Showing posts with label .Net. Show all posts
Showing posts with label .Net. Show all posts

Wednesday, 20 July 2016

Installing Asp.net Core


Steps To Install Asp.net Core

   

Step 1. Before Installing Asp.net Core Let Fulfill Its Prerequisites As Below -

First you need to Install Visual Studio 2015 . You Can Download Free Visual Studio Community Edition From Link below -
Download Visual Studio 2015

For Mac & Linux Users You Can Use Visual Studio Code -
Download Visual Studio Code & Read Its All Details 

Step 2. After Download & Installing Visual Studio 2015 you need to make sure you have Visual Studio 2015 Update 3 Installed . You Can Download Visual Studio 2015 Update 3 From Link Below -
Download Visual Studio 2015 Update 3

Real ALL Details About Visual Studio 2015 Update 3 Here -
What's New Added in Visual Studio Update 3

Step 3 -  Please Check Out All Dependencies of Asp.net Core Before Installing it . See All Dependencies of Asp.net Core For All OS -
Dependencies of Asp.net Core

Step 4 - Now Download & Install Asp.net Core From link below -
Download Asp.net Core

Step 5 - Now Asp.net Core is Setup Head Towards Next Post To Make First Sample App in Asp.net Core To Make Ensure its setup Correctly . Link TO Next Post is Below - 

Wednesday, 6 July 2016

Object Pooling in Csharp


What is Object Pooling in Csharp ?

Object Pooling is Technique for Efficient Resource Allocation.A Performance Optimization Technique that is based on using Pool of Pre-Allocated Resources Such of Objects For Efficient Resource Allocation . It refers to Reusing of Allocated Memory again and again instead of demanding for more memory as there are chances that more required  memory may be not available at runtime (In Running Application) 

Why We Need Object Pooling & How It Works?

Have you Heard about Car Pooling ? Let me tell you about that . Car Pooling and Object Pooling is based on Same Concept . 

Both are based on Re-using / Proper Utilization of Resource . Instead of Having or using new Resource Each Time We Require . 

In Car Pooling We Use Same Resource Car for Multiple Person Instead of Using Car for Each Person . If 4 Person are going to office instead of going from their own car . Car Pooling Tells to Use one car For all 4 People That will save various Natural Resource and money .

Similarly In Object Pooling Memory is assigned to Program Execution and When more objects are required to initialized then instead of demanding and getting more memory resources it waits for previous memory block to get free to be used .

Didn't Got it Don't Worry See Below  


Real Time Example of Object Pooling  ?

Problem :
Let’s assume we are running an application which needs allocation of memory for its execution and this application is using Multithreading. This means more than one threads can allocate the same amount of memory simultaneously . 

Consider that the application needs 100K memory for its execution and there are 50 threads running simultaneously. All 50 threads will call a method of the application simultaneously.

All the threads will try to allocate 100000 bytes in the heap simultaneously. The OS may not get enough time to swap pages. Thus the application will be under heavy concurrent access, and the application may fail due to misleading memory management!

Solution :

WE can also create a pool of large Memory Block as much we can according to how much memory we require, at startup. That way, say we create 100 times 100K bytes in memory at startup. If it fails, well enough - we know that right at startup! So there is no surprise at runtime, when the application is live! So we can reduce that number to 75 (from 100) and try again to start our application. Once up and running, we know that there will be barely a need for it to allocate more memory at runtime, as we already have the memory for 75 or 100 arrays allocated. It just uses that as "an object pool", pulls from it, and when done, returns the byte arrays for subsequent use. Chances are that unless truly "concurrent", the already allocated byte arrays will be re-used over and over again, and at runtime, no extra memory will be allocated. If all 75 or 100 arrays are in use, and a 101st request comes in, it will need to allocate an additional memory of only one array - which is easy for the OS to manipulate in RAM.

Still Din't Got Don't Worry Feel Free! To Comment  

Tuesday, 28 April 2015

ASP.NET MVC Action Return View Not Changing URL

The return View(.......) in Action of Controller is the statement that we use to return the view View for a Particular Controller Request . But Return view will return the view exactly you want and render the view but it will not change or target the user to target url  . The simple solution is below -


Code For an Action -

[HttpPost]
public ActionResult Start(SomeViewModel someViewModel)
{
  ...
  return RedirectToAction("SomeOtherAction");

              
                             or


  return RedirectToAction("Action Name", "Controller Name");
}

So , In code above We are using RedirectToAction instead of using  return view this can be used in total of 6 variants .

I have give 2 of simple one . In Parameter to these actions you need to pass the controller and action name according to variant you choose


Wednesday, 11 February 2015

HTTP Error 500-22 - Internal Server Error The page cannot be displayed because an internal server error has occurred



Now At 11:47 PM I am going to write about how to solve HTTP 500.22 - Internal Server Error . This error is really very Bad Boy . It only display Error Message and does not give any detailed information about error as we don't normally allow for that . So Now I am going to give information how today Solved this error and what will be sure short and easy steps to solve this error so that you save your time .

I First tried to set CustomErrors="Off" in web.congig file just after <system.web> tag start But it does not helped so first i need to find way to see the error . So only way to see the error is through log file . I was using azure so I decided to turn on azure logging to check what is error

Enable Logging In Microsoft Azure Portal -


- Enable Application Diagnostics Logging 


1. Login to Azure Portal . In sidebar click on websites . Click on desired website
2. Now click on configure In Top Menu and scroll down and find 'Application Diagnostics'
3. Once found Do configuration as shown below -

Application Diagnostics For Application Logging - Windows Azure
Application Diagnostics For Application Logging - Windows Azure

- Enable Web Server Logging 


1. Login to Azure Portal . In sidebar click on websites . Click on desired website
2. Now click on configure In Top Menu and scroll down and find 'Web Server Logging'
3. Once found Do configurations as shown below -

Web Server Logging - Windows Azure
Web Server Logging - Windows Azure

4. After Doing Both Diagnostics Configuration . you must Save and Restart Azure Website .

How To Find Error In Azure Website Log


1. Now after Enabling Log you can see your log by logging in your FTP Client like CuteFTP or      FileZilla( In my case) . First login to your FTP Client of that website

2. Now at root you can see a folder named LogFiles as shown below -

LogFile In windows Azure
LogFile In windows Azure


3. Open the folder and then find a folder named 'DetailedErrors' Now open the folder here you can 4. see all your errors details for that particular website . as shown below -



Azure Website Log File Detailed Errors
Azure Website Log File Detailed Errors


5. So choose the latest file and download it to your computer and open it in browser and It will show you error in your azure website in Detail so that we can know error information to solve the error . In my case error was HTTP Error 500.22 error as shown by log file below snapshot -


Find Error Using Logs in windows Azure
Find Error Using Logs in windows Azure


 Cause of  HTTP Error 500-22 - Internal Server Error


The Main cause of  "HTTP Error 500-22 - Internal Server Error  The page cannot be displayed because an internal server error has occurred" is Managed Pipeline Mode in Application Pool . Integrated Pipeline Mode of Application Pool does not support some services and functionalities 

Solution For HTTP Error 500-22 - Internal Server Error  


Step 1- Change Application Pool From Integrated Pipeline Mode To Classic Pipeline Mode


FOR IIS USERS ON Windows Server


1. Open Control Panel Then GoTo Administrative Tools
2. Then choose IIS Manager
3. Now Change  App site's Managed Pipeline from Integrated to Classic.

FOR AZURE PORTAL USERS 


1. Login to your Azure Portal . In sidebar click on websites . Click on desired website
2. Now click on configure In Top Menu and Under General Section find 'Managed Pipeline Mode'
3. Once Found Change mode from Integrated To Classic Pipeline Mode  as shown in snapshot below

Enable Classic Pipeline Mode Application Pool IIS and Windows Azure
Enable Classic Pipeline Mode Application Pool IIS and Windows Azure

Now after this change No other change will be required Everything is solved now . browse your website everything will be fine .

In case you face some Problem or Same Error Persist You may try the following solutions that can help in resolving issue 

 Changes in Web.Config File (Optional )


1. First open your Web.Config file and Search for <Configuration> Tag opening part and then insert following code in it and it should look like below --

<configuration>
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false"/>
    </system.webServer>
</configuration>

Sunday, 25 January 2015

Crud Operation in AngularJS With Bootstrap


In My Previous Article I explored about How to setup angularjs in Visual Studio and also Explored concepts of What , why and when To use AngularJS . In this article I am going to do CRUD Operation in AngularJS . CRUD operations means Insert , view , Update and Delete Data In Database . CRUD operations are most important thing that you must practice to create Applications either simple or complex in AngularJS or in any other Language or Technology . I am giving a simple code and easy sample that you can use to Perform CRUD operations in AngularJS using .NET technology 

Download the Sample Code from Link Below .

Download Code



How to setup/Run this sample 


1. First Download the code 
2. Then Open Web.config file and update the connection string to your sqlserver connection string by first making database in you sql server .
3. You need to Deal with CODE First Data migration Commands you can see these command in  link below :-

Data Migration


Snapshots

View Data From Database AngularJS

Insert Data In Database AngularJS

Delete Data from Database AngularJS

Update Data From Database AngularJS

Why we should use AngularJS

What is AngularJS

Why Its Called AngularJS

Why To Use AngularJS

When To Use AngularJS

So , Today i started to explore the top-most question that always stuck our mind when we start with new technology . Like i already know my stuff then when i started with angular these above are basic questions that stuck my mind that what is angularjs and why i should use it and when  .

Today briefly I am going to give answers to these questions -

What is AngularJS ?

AngularJS is a javascript framework developed by Google's Employees . What so special about angularjs is it is client side . what all you need is Javascript and any programming language of your own choice to start with AngularJS that makes angular best . Like in my case I am Asp.net C# developer so I use my all logic like database connectivity in c# and all bindings are done by Angularjs and Let me tell you it is so fast in case of Searching and other type of operations required in Applications developement this is because everything in here is through javascript which is client side It has all inbuilt functions for different type of work that make it suitable for web development .

Why Its Called AngularJS ?

Now foremost question is why its called AngularJS this is because its main Namespace is ng and that sounds like Angular and JS is used with it that's why its called AngularJS .

Why To Use AngularJS

5 Main Points Why we should use AngularJS -

  1. Angular Provides Data-Binding:- binding is the coolest concept in AngularJS. It's a fascinating real-time concept. Just like desktop application, mobile apps user also wishes to witness swift changes in the UI. So AngularJS’ two-way data binding handles the synchronization between the DOM and the model, and vice versa. As a result, the UI changes based on other input components are very much smooth without any extra effort on the part of the developer
  2. Angular Enables Single Page Apps :- Single Page Applications are becoming more popular for a good reason. They fill a very specific need. More functionality is being moved to the web, and the browser is finally realizing its potential as a distributed computing node. By design, SPA applications are far more responsive (even though some of that is perception). They can provide an experience that feels almost like a native app in the web. By rendering on the client they cut down load on the server as well as reduce network traffic – instead of sending a full page of markup, you can send a payload of data and turn it into markup at the client. Of course, Angular doesn't force you into building a SPA app, it only provides plenty of built-in support
  3.  Angular Provides Dependency Injection :- AngularJS has a built-in dependency injection subsystem useful for developers as it makes application development easier including testing. Dependency Injection (DI) allows users to ask for dependencies, rather than having to go and look for them or make them on their own .

    for example, “Hey I need X’, and the DI is responsible for creating and providing it for you. If user wants to gain access to core AngularJS services, all they need to do is add service as a parameter. AngularJS will detect that users need that service and will provide it instantly.
  4.  AngularJS Directives :- Directives can create custom HTML tags that serve as new and custom widgets.Directives achieve this by allowing users to invent their own HTML elements. Putting DOM manipulation code into the directives makes it easy for the users to separate them out of MVC app and leaves MVC to update the view with new data, but how the view will behave is certainly up to directives
  5. AngularJS requires less coding :- The data-binding feature allows developers to stop providing data manually into the view. Filters allow you to manipulate the data on the view level without changing your controllers. As a result, developers need to write very little code to achieve the task, which is a great deal for the developers

     When To Use AngularJS ?

    AngularJS is a very good SPA framework. If we want to create a SPA application, then AngularJS is a good option for it.“SPA” refers to Single Page Application. A Single Page Application is one in which we have a shell page and we can load multiple views into that. So a traditional app, as you know you typically blink and load everything again.
    It’s not very efficient on the bandwidth, especially in the mobile world. In a SPA, we can load the initial content upfront and then the different views or the small kind of mini web pages can be loaded on the fly and embedded into the shell.

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

Setting up Angularjs in Visual Studio Express

AngularJS is a unique framework that without doubt will shape the web development space in the years to come . AngularJS is a recent addition to the client-side MVC frameworks list, yet it has
managed to attract a lot of attention, mostly due to its innovative templating system, ease of  development, and very solid engineering practices

In Simple Words I would say AngularJs is Awesome that anything else .

AngularJS is a relatively new actor on the client-side MVC frameworks scene; its 1.0 version was released only in June 2012. In reality, the work on this framework started in 2009 as a personal project of Miško Hevery, a Google employee. The initial idea turned out to be so good that, at the time of writing, the project was offiially backed by Google Inc., and there is a whole team at Google working full-time on the framework.

AngularJS is an open source project hosted on GitHub (https://github.com/angular/angular.js) and licensed by Google, Inc. under the terms of the MIT licens



Setting Up Angularjs in Visual Studio

1. First Open Visual Studio then Click on Tools Menu
2. Then Under Tools Menu click on Extension and Updates
3. It shows Extension and Updates Window . Now in Search Box at Top right side Typein AngularJS and Hit Enter .
4. Now you will be shown the result as below screenshot -

Add caption

 5. Now click on Install button to Install Angular js in visual studio .
 6. If any of Nuget packages are missing then these will be dependencies for angular that will automatically installed . as shown in screenshot below -


7. Now to check AngualarJS is installed click on File menu then click on New then click on Project
Now  under Templates -> Web category you can see AngularJS installed as shown in screenshot below -


Now AngularJS is ready in Visual Studio .


 




Saturday, 27 September 2014

BootStrap Technology For Responsive Websites

Bootstrap is very good  and simple to use technology for making your website Mobile Compatible . It helps to make your website compatible with every you open it . Regardless of the screen size where we opens the website it provides full Responsiveness

Bootstrap File Structure

bootstrap/
├── css/
│   ├── bootstrap.css
│   ├── bootstrap.min.css
│   ├── bootstrap-theme.css
│   └── bootstrap-theme.min.css
├── js/
│   ├── bootstrap.js
│   └── bootstrap.min.js
└── fonts/
    ├── glyphicons-halflings-regular.eot
    ├── glyphicons-halflings-regular.svg
    ├── glyphicons-halflings-regular.ttf
    └── glyphicons-halflings-regular.woff


BootStrap Online File Links

 For Making your website Responsive using Bootstrap Technology You require some css , js coded files you can then use classes defined in these files to make your website responsive  you can either download these files from links below or you can directly provide these links in <head > </head> Tag of your Html or jsp or aspx file .
 For using Offline files :- 
 Go to links below one by one and this will open css code save the files with their respective names and then reference them in your page <head></head> Tag
For using Online Files :- 
Just include the following code lines in your page's <head></head> Tag
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" ref="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

A Simple Sample of Bootstrap Html Page Below :-


<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap 101 Template</title>

    <!-- Bootstrap -->
    <link href="css/bootstrap.min.css" rel="stylesheet">

    <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
      <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
  </head>
  <body>
    <h1>Hello, world!</h1>

    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <!-- Include all compiled plugins (below), or include individual files as needed -->
    <script src="js/bootstrap.min.js"></script>
  </body>
</html>

Grid System In Bootstrap

Grid systems are used for creating page layouts through a series of rows and columns that house your content. Bootstrap's Grid system has done a lot of ease for developers Instead of doing calculations for div's like they do before bootstrap technology they can easily divide the page into columns and rows and design the page according to it .

Here's how the Bootstrap grid system works:

  • Rows must be placed within a .container (fixed-width) or .container-fluid (full-width) for proper alignment and padding. A container will contain all your divs
  • Use rows to create horizontal groups of columns.
  • Content should be placed within columns, and only columns may be immediate children of rows.
  • Predefined grid classes like .row and .col-xs-4 are available for quickly making grid layouts. Less mixins can also be used for more semantic layouts.
  • Columns create gutters (gaps between column content) via padding. That padding is offset in rows for the first and last column via negative margin on .rows.
  • The negative margin is why the examples below are outdented. It's so that content within grid columns is lined up with non-grid content.
  • Grid columns are created by specifying the number of twelve available columns you wish to span. For example, three equal columns would use three .col-xs-4.
  • If more than 12 columns are placed within a single row, each group of extra columns will, as one unit, wrap onto a new line.
  • Grid classes apply to devices with screen widths greater than or equal to the breakpoint sizes, and override grid classes targeted at smaller devices. Therefore, applying any .col-md- class to an element will not only affect its styling on medium devices but also on large devices if a .col-lg- class is not present.
Reference Links

1. http://getbootstrap.com/
2. http://getbootstrap.com/css/

Wednesday, 20 August 2014

save to google drive button javascript code

This is a simple javascript code to upload file from your computer to google drive using google drive api

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
   <script src='https://apis.google.com/js/platform.js'></script>
<div class="g-savetodrive"   data-src="/images/attendance.png" data-filename="ppupload1.jpg" data-sitename="Pictures of "    >
</div>
    </form>
</body>
</html>


Sunday, 3 August 2014

Mixed mode assembly is built against version 'v2.0.50727' of the runtime


Error :- Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information

Error Explanation -
During using Sqlite Database with Csharp Applications you may suffer from this error Don't fear from it this is simple error

This problem is seen often . The main reasonof this problems  is that, because of the support for side-by-side runtimes in .Net Technology , .NET framework 4.0 has changed its way of binding  to older framework mixed-mode assemblies. These assemblies are those that are compiled from old  C++\CLI. Currently available DirectX assemblies are mixed mode. If you see a message like this then you know you have run into the issue:

Mixed mode assembly is built against version 'v1.1.4322' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

SOLUTION :
Add the Following code in App.config file . App.config file will be available in Solution Explorer . If App.config is not available then you can add it by :-

  1. Right click on Project's folder in Solution Explorer 
  2. Click on Add then click on New
  3. Now scroll and find Application Configuration file and Click ok
  4. Now App.config will be successfully added .
  5. Now make the code of your App.config file similar to the following code or the replace the <startup> tag with tag given below

    <startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
     <requiredRuntime version="v4.0.20506" />
    </startup>
  6. Now All errors Will be gone and continue your code with SQlite Csharp using link below :-

    How To Use Sqlite Database With Csharp





Friday, 1 August 2014

How To use Crystal Reports in Asp.net


Download zip code file  for Crystal Report Demo App
Download Code For How To use Crystal Reports in Asp.net

Setting Up Sql Server Database 

  1. Open you Sql Server Management Studio
  2. Connect to SQl Server
  3. Then  in Right panel Right click on Databases and Click on New Database
  4. Now A New Dialog Box Appears 
  5. Fill Database name: TestReports and Hit Enter . Now Table will be successfully created

  6. Now in the Query window execute the following scripts to create table

  7. After successfull creation of tables insert some dummy data in tables using following query code

  8. Now Our Database work is over Now we go to Visual Studio for code

Now Do Code in Visual Studio
Start your Visual Studio .Click on New project choose Asp.net Web Form  Application and Give a appropriate name and choose location and Hit Enter .


Getting Dataset Ready For Report

  1. Right click on Project Folder in solution Explorer and click on Add then in further sub-menu click on New item

  2. Now a Popup window appears scroll and choose DataSet give name "Customers" and Click on Ok to add DataSet
  3. Now Customers Dataset will be added in solution explorer . Now Double click on it 
  4. It will open DataSet Designer Now right click on and create new DataTable 
  5. After Creating DataTable it will be empty by default now we will add column to it similar to our column in table in database 
  6. Right click on DataTable that we have created and Create new Column and give it name try to give the name similar to name of columns in Table in Database


Adding Crystal Report

  1. Right click on Project Folder in solution Explorer and click on Add then in further sub-menu click on New item 
  2. Now a Popup window appears scroll and choose Crystal Report give it name and Click on Ok

  3. Now Crystal Report Gallery window popup after some time 
  4. Now choose "Using the Report Wizard"  and click ok

  5. Now a window will popup and tell you to choose your dataset that we have created in above steps
  6. Choose your Datatable under Customers DataSet and Click ok
  7. Now your Dataset fields will be added on Field Explorer . Field explorer is available on left side of visual studio window
  8. In Field explorer under Database Expert you all datatable fields will be available

  9. you can drag these fields to crystal Report Details Section When you add them in  Details Section Its Header will automatically added to Page Header Section
  10. you can do some design of your Crystal Report like shown below :-


Designing Form

  1. Now  we will add a Aspx form that will be used to view our Crystal Report
  2. Right click on Project Folder in solution Explorer and click on Add then in further sub-menu click on New item 
  3. Now a Popup window appears scroll and choose WebForm give it name and Click on Ok  
  4. Now delete the existing code Add Following Code To Aspx Form


<%@ Register Assembly="CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"
    Namespace="CrystalDecisions.Web" TagPrefix="CR" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <center>
    <CR:CrystalReportViewer ID="CrystalReportViewer1" runat="server" AutoDataBind="true" Width="1000" />
            </center>
    </form>
</body>
</html>



Adding Csharp ( C# ) Code


  1. Now go to Csharp code of New Added Webform and Add code similar to code below :-
  2. Add this code under your partial class -- 


protected void Page_Load(object sender, EventArgs e)
    {
        ReportDocument crystalReport = new ReportDocument();
        crystalReport.Load(Server.MapPath("~/CustomerReport.rpt"));
        Customers dsCustomers = GetData("select * from Testtable");
        crystalReport.SetDataSource(dsCustomers);
        CrystalReportViewer1.ReportSource = crystalReport;
    }

    private Customers GetData(string query)
    {
        string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        SqlCommand cmd = new SqlCommand(query);
        using (SqlConnection con = new SqlConnection(conString))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;

                sda.SelectCommand = cmd;
                using (Customers dsCustomers = new Customers())
                {
                    sda.Fill(dsCustomers, "DataTable1");
                    return dsCustomers;
                }
            }
        }
    }

Tuesday, 29 July 2014

How to use XML Parsing And TableLayout in Mono Android


In order to start with XML Parsing or XML data Handling in Microsoft .NET Framework first we need to know about what classes or namespaces are available to us for using or dealing with XML Document or XML Data in .Net So Here is list of XML Namespaces available for XML Processing and Handling :-


  • System.Xml;
  • System.Schema;
  • System.Xml.Serialization;
  • System.Xml.XPath;
  • System.Xml.Xsl;


Here , Out of these classes System.Xml class is major class that is responsible or must for XML Data Processing and this is the namespace that we are going to use in our tutorial today . The System.Xml namespace contains number of classes that are used for reading and writting Xml data from XML Documents . System.Xml contains :-


  • XmlReader for Reading Xml Documents we are not going to use it in our tutorial today
  • XmlWritter For Writting Xml Documents we are not going to use it in our tutorial today

There is another important class that we will use in our XML Parsing today . This is XmlNode It plays important role for getting xml data node by node This class represents every single node of the XML Document


OUTPUT SCREEN WITH RESULT 
I have used API 8 for building this app you Download the Application complete code from here :-
Download Xml Parser Android with TableLayout -- geeksprogrammings



Main.Xaml CODE MONO ANDROID

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center_horizontal"
    android:orientation="vertical">
    <TableLayout
        android:id="@+id/main_table"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:layout_marginTop="0.0dp"
        android:scrollbars="vertical" />
</LinearLayout>

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
using Android.Graphics;
using System.Xml;

XAML CODE EXPLANATION MONO ANDROID

step 1
In first line i have declared the xml version and encoding type this denotes that  this is an xml file code . In android xml code is used for creating design or layout of mono Android Apps

step 2
Now We have added a Linear Layout this is a default layout for Mono Android Application all controls or other layouts that we will use in our Mono Android Application will reside under this LinearLayout Tag
It contains Starting and Ending Tag .

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center_horizontal"
    android:orientation="vertical">

</LinearLayout>

step 3
Now Under LinearLayout we have included a Table layout We have included Table layout because we in this tutorial of xml parsing is going to parse xml and then view the retrieved xml data in table view . We have used following code for styling or placing table layout

<TableLayout
        android:id="@+id/main_table"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:layout_marginTop="0.0dp"
        android:scrollbars="vertical" />



Csharp Code For XML Parsing MONO ANDROID

namespace AndroidApplication5
{
    [Activity(Label = "AndroidApplication5", MainLauncher = true, Icon = "@drawable/icon")]
    public class Activity1 : Activity
    {
        int count = 1;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            SetContentView(Resource.Layout.Main);

            XmlDocument doc = new XmlDocument();
            doc.LoadXml("<Product>    <ID>1</ID>    <SeqNo>1</SeqNo>    <Stage>Stage</Stage> <Observation>Observation</Observation><CHK></CHK> </Product>");
   
            XmlNode node = doc.DocumentElement.SelectSingleNode("/Product/ID");
            XmlNode node1 = doc.DocumentElement.SelectSingleNode("/Product/SeqNo");
            XmlNode node2 = doc.DocumentElement.SelectSingleNode("/Product/Stage");
            XmlNode node3 = doc.DocumentElement.SelectSingleNode("/Product/Observation");
            XmlNode node4 = doc.DocumentElement.SelectSingleNode("/Product/CHK");

            TableLayout ll = FindViewById<TableLayout>(Resource.Id.main_table);
         
     
            for (int i = 0; i < 10; i++)
            {
                TableRow row = new TableRow(this);
                TableRow.LayoutParams lp = new TableRow.LayoutParams(TableRow.LayoutParams.FillParent);
             
                row.LayoutParameters = lp;
                row.SetGravity(GravityFlags.CenterHorizontal);
             
            TextView checkBox = new TextView(this);
             TextView   tv = new TextView(this);
             TextView addBtn = new TextView(this);
             TextView rcf = new TextView(this);
             CheckBox verified = new CheckBox(this);
             TextView ver = new TextView(this);
             TextView    qty = new TextView(this);
             
                if (i == 1)
                {
                    checkBox.Text = node.Name.ToUpper().ToString();
                    checkBox.SetBackgroundColor(Color.AliceBlue);
                    checkBox.SetTextColor(Color.Black);
                    checkBox.SetPadding(7,9,7,9);

                    qty.Text = node1.Name.ToUpper().ToString();
                    qty.SetBackgroundColor(Color.AliceBlue);
                    qty.SetTextColor(Color.Black);
                    qty.SetPadding(7, 9, 9, 9);

                    tv.Text = node2.Name.ToUpper() .ToString();
                    tv.SetBackgroundColor(Color.AliceBlue);
                    tv.SetTextColor(Color.Black);
                    tv.SetPadding(7, 9, 9, 9);

                    addBtn.Text = node3.Name.ToUpper().ToString();
                    addBtn.SetBackgroundColor(Color.AliceBlue);
                    addBtn.SetTextColor(Color.Black);
                    addBtn.SetPadding(9, 9, 9, 9);

                    ver.Text = node4.Name.ToUpper().ToString();
                    ver.SetBackgroundColor(Color.AliceBlue);
                    ver.SetTextColor(Color.Black);
                    ver.SetPadding(9, 9, 9, 9);
                 
                }
                else if (i == 0)
                {
                    checkBox.Text = "Inspection";
                    checkBox.SetBackgroundColor(Color.AliceBlue);
                    checkBox.SetTextColor(Color.Black);
                    checkBox.SetPadding(9, 9, 9, 9);

                    qty.Text = "Details";
                    qty.SetBackgroundColor(Color.AliceBlue);
                    qty.SetTextColor(Color.Black);
                    qty.SetPadding(9, 9, 9, 9);

                    tv.Text = "Rail";
                    tv.SetBackgroundColor(Color.AliceBlue);
                    tv.SetTextColor(Color.Black);
                    tv.SetPadding(9, 9, 7, 9);

                    addBtn.Text = "Coach";
                    addBtn.SetBackgroundColor(Color.AliceBlue);
                    addBtn.SetTextColor(Color.Black);
                    addBtn.SetPadding(7, 9, 9, 9);

                    ver.Text = "";
                    ver.SetBackgroundColor(Color.AliceBlue);
                    ver.SetTextColor(Color.Black);
                    ver.SetPadding(9, 9, 9, 9);
                }
                else
                {
                    checkBox.Text = (i-1).ToString();
                    checkBox.SetBackgroundColor(Color.Black);
                    checkBox.SetTextColor(Color.White);
                    checkBox.SetPadding(7,9,9,9);

                    qty.Text = (i - 1).ToString();
                    qty.SetBackgroundColor(Color.Black);
                    qty.SetTextColor(Color.White);
                    qty.SetPadding(7,9,9,9);

                    tv.Text = node2.InnerText+(i-1).ToString ();
                    tv.SetBackgroundColor(Color.Black);
                    tv.SetTextColor(Color.White);
                    tv.SetPadding(9, 9, 9, 9);

                    addBtn.Text = node3.InnerText + (i-1).ToString();
                    addBtn.SetBackgroundColor(Color.Black);
                    addBtn.SetTextColor(Color.White);
                    addBtn.SetPadding(9, 9, 9, 9);
                    verified.Checked = true;
                }

                checkBox.Gravity = GravityFlags.CenterHorizontal;
                tv.Gravity = GravityFlags.CenterHorizontal;
                qty.Gravity = GravityFlags.CenterHorizontal;
                addBtn.Gravity = GravityFlags.CenterHorizontal;

                row.AddView(checkBox);
                row.AddView(qty);
                row.AddView(tv);
                row.AddView(addBtn);

                if (i == 1)
                {
                    row.AddView(ver);
                }
                else if(i>1)
                {
                    row.AddView(verified);

                }
                ll.AddView(row, i);
            }
   
   }
            }
    }

CsharpCode Explanation For XML Parsing MONO ANDROID

step1 

we start with main login of xml parsing that we are covering in our this tutorial here we have first include System.Xml namespace at top of our code document then we have used a XmlDocument class by making an instance of that class then we have passed the static Xml data to instance of XmlDocument by using LoadXml class that receives the xml data . you can see code below :-

 XmlDocument doc = new XmlDocument();
            doc.LoadXml("<Product>    <ID>1</ID>    <SeqNo>1</SeqNo>    <Stage>Stage</Stage> <Observation>Observation</Observation><CHK></CHK> </Product>");

Step 2

After passing the xml data now we are going to filter the xml data with respect to nodes of xml In our xml data Product is Parent node and it contains other child node like ID,SeqNo ..........
As we have loaded the xml data in doc we have used doc.Documentelement.SelectSingleNode that will select the single node of 'ID' that is child of Parent node 'Product'
You can see the code below :-

            XmlNode node = doc.DocumentElement.SelectSingleNode("/Product/ID");
            XmlNode node1 = doc.DocumentElement.SelectSingleNode("/Product/SeqNo");
            XmlNode node2 = doc.DocumentElement.SelectSingleNode("/Product/Stage");
            XmlNode node3 = doc.DocumentElement.SelectSingleNode("/Product/Observation");
            XmlNode node4 = doc.DocumentElement.SelectSingleNode("/Product/CHK");

step 3

With these lines of code below we are select the table layout that we have added in our xml code in layout file . You can see the code below :-

            TableLayout ll = FindViewById<TableLayout>(Resource.Id.main_table);

Step 4

This is main logic of code where we are reading xml data and then adding dynamic rows to table layout

 for (int i = 0; i < 10; i++)    // starting loop form 0 -9 to display 10 rows in table dynamically
            {
//creating a new tablerow
                TableRow row = new TableRow(this);    

//Setting tablerow hight , width parameters
                TableRow.LayoutParams lp = new   TableRow.LayoutParams(TableRow.LayoutParams.FillParent);
             
assigning the layoutparameters to row
                row.LayoutParameters = lp;

//setting row to alignment to center horizontal
                row.SetGravity(GravityFlags.CenterHorizontal);
             
//Adding some required TextView
            TextView checkBox = new TextView(this);
             TextView   tv = new TextView(this);
             TextView addBtn = new TextView(this);
             TextView rcf = new TextView(this);
             CheckBox verified = new CheckBox(this);
             TextView ver = new TextView(this);
             TextView    qty = new TextView(this);
             
                if (i == 1)        // this is for second row of table to display column names not values
                {
                    checkBox.Text = node.Name.ToUpper().ToString();
                    checkBox.SetBackgroundColor(Color.AliceBlue);
                    checkBox.SetTextColor(Color.Black);
                    checkBox.SetPadding(7,9,7,9);

                    qty.Text = node1.Name.ToUpper().ToString();
                    qty.SetBackgroundColor(Color.AliceBlue);
                    qty.SetTextColor(Color.Black);
                    qty.SetPadding(7, 9, 9, 9);

                    tv.Text = node2.Name.ToUpper() .ToString();
                    tv.SetBackgroundColor(Color.AliceBlue);
                    tv.SetTextColor(Color.Black);
                    tv.SetPadding(7, 9, 9, 9);

                    addBtn.Text = node3.Name.ToUpper().ToString();
                    addBtn.SetBackgroundColor(Color.AliceBlue);
                    addBtn.SetTextColor(Color.Black);
                    addBtn.SetPadding(9, 9, 9, 9);

                    ver.Text = node4.Name.ToUpper().ToString();
                    ver.SetBackgroundColor(Color.AliceBlue);
                    ver.SetTextColor(Color.Black);
                    ver.SetPadding(9, 9, 9, 9);
                 
                }
                else if (i == 0)      //this is for first row to display Heading
                {
                    checkBox.Text = "Inspection";
                    checkBox.SetBackgroundColor(Color.AliceBlue);
                    checkBox.SetTextColor(Color.Black);
                    checkBox.SetPadding(9, 9, 9, 9);

                    qty.Text = "Details";
                    qty.SetBackgroundColor(Color.AliceBlue);
                    qty.SetTextColor(Color.Black);
                    qty.SetPadding(9, 9, 9, 9);

                    tv.Text = "Rail";
                    tv.SetBackgroundColor(Color.AliceBlue);
                    tv.SetTextColor(Color.Black);
                    tv.SetPadding(9, 9, 7, 9);

                    addBtn.Text = "Coach";
                    addBtn.SetBackgroundColor(Color.AliceBlue);
                    addBtn.SetTextColor(Color.Black);
                    addBtn.SetPadding(7, 9, 9, 9);

                    ver.Text = "";
                    ver.SetBackgroundColor(Color.AliceBlue);
                    ver.SetTextColor(Color.Black);
                    ver.SetPadding(9, 9, 9, 9);
                }
//else is used for all other rows to be added dynamically except 0,1 row
                else
                {
                    checkBox.Text = (i-1).ToString();
                    checkBox.SetBackgroundColor(Color.Black);
                    checkBox.SetTextColor(Color.White);
                    checkBox.SetPadding(7,9,9,9);

                    qty.Text = (i - 1).ToString();
                    qty.SetBackgroundColor(Color.Black);
                    qty.SetTextColor(Color.White);
                    qty.SetPadding(7,9,9,9);

                    tv.Text = node2.InnerText+(i-1).ToString ();
                    tv.SetBackgroundColor(Color.Black);
                    tv.SetTextColor(Color.White);
                    tv.SetPadding(9, 9, 9, 9);

                    addBtn.Text = node3.InnerText + (i-1).ToString();
                    addBtn.SetBackgroundColor(Color.Black);
                    addBtn.SetTextColor(Color.White);
                    addBtn.SetPadding(9, 9, 9, 9);
                    verified.Checked = true;
                }

                checkBox.Gravity = GravityFlags.CenterHorizontal;
                tv.Gravity = GravityFlags.CenterHorizontal;
                qty.Gravity = GravityFlags.CenterHorizontal;
                addBtn.Gravity = GravityFlags.CenterHorizontal;

                row.AddView(checkBox);
                row.AddView(qty);
                row.AddView(tv);
                row.AddView(addBtn);

                if (i == 1)
                {
                    row.AddView(ver);
                }
                else if(i>1)
                {
                    row.AddView(verified);

                }
                ll.AddView(row, i);
            }