Javascript code to check/uncheck all checkboxes from header check box

<script type="text/javascript">
var TotalChkBx;
var Counter;
window.onload = function()
{
    TotalChkBx = parseInt('<%= this.GridView3.Rows.Count %>');
    Counter = 0;
}
function SelectAll(CheckBox)
{
    var TargetBaseControl = document.getElementById('<%= this.GridView3.ClientID %>');
    var TargetChildControl = "chkselect";
    var Inputs = TargetBaseControl.getElementsByTagName("input");
    for(var n = 0; n < Inputs.length; ++n)
    if(Inputs[n].type == 'checkbox' && Inputs[n].id.indexOf(TargetChildControl,0) >= 0)
    Inputs[n].checked = CheckBox.checked;
    Counter = CheckBox.checked ? TotalChkBx : 0;
}
function ChildClick(CheckBox, HCheckBox)
{
    var HeaderCheckBox = document.getElementById(HCheckBox);
    if(CheckBox.checked && Counter < TotalChkBx)
    Counter++;
    else if(Counter > 0)
    Counter--;
    if(Counter < TotalChkBx)
    HeaderCheckBox.checked = false;
    else if(Counter == TotalChkBx)
    HeaderCheckBox.checked = true;
}
</script>
onclick="javascript:SelectAll(this);"

GridView Events Summary

Introduction

In this article i have tried to summarize all the  events of grid view which i came across.

What is a GridView?

The DataGrid or GridView control displays data in tabular form, and it also supports selecting, sorting, paging, and editing the data inside the grid itself. The DataGrid or GridView generates a BoundColumn for each field in the data source (AutoGenerateColumns=true). By directly assigning the data source to the GridView, the data can be rendered in separate columns, in the order it occurs in the data source. By default, the field names appear in the grid's column headers, and values are rendered in text labels. A default format is applied to non-string values and it can be changed.

GridView Fields

Column Name		Description
BoundColumn		To control the order and rendering of columns.
HyperLinkColumn		Presents the bound data in HyperLink controls
ButtonColumn		Bubbles a user command from within a row to the grid event handler
TemplateColumn		Controls which controls are rendered in the column
CommandField		Displays Edit, Update, and Cancel links in response to changes in the DataGrid control's EditItemIndex property.

OOPs Concept

Class

• A class is a user defined data type that behaves like a built in data type.


• A class acts as a blueprint for an object.


• A class contains all the attributes and behavior of an object.


• A class is a wrapper/container of an object.


• A class doesn’t occupy apace in memory.

Object

Instance of Class is called object. An object is created in memory using keyword “new”.

• An object is an instance of a class.


• It is a run time entity.


• Anything in this real world can be termed as object.


• An object possesses attributes and behavior.


• An object occupies space in memory and utilizes CPU processing.

Object Serialization in the .NET Framework

Introduction

Serialization can be defined as the process of storing the state of an object instance to a storage medium. During this process, the public and private fields of the object and the name of the class, including the assembly containing the class, is converted to a stream of bytes, which is then written to a data stream. When the object is subsequently deserialized, an exact clone of the original object is created.

When implementing a serialization mechanism in an object-oriented environment, you have to make a number of tradeoffs between ease of use and flexibility. The process can be automated to a large extent, provided you are given sufficient control over the process. For example, situations may arise where simple binary serialization is not sufficient, or there might be a specific reason to decide which fields in a class need to be serialized. The following sections examine the robust serialization mechanism provided with the .NET Framework and highlight a number of important features that allow you to customize the process to meet your needs.

JSON – Serialization and Deserialization

What is JSON?

JSON is another format of expressing data, just like XML. But, JSON is very simpler than XML, and tiny than XML. So, it is becoming popular in the web world to choose the JSON notation over XML since JSON notation are usually shorter, and less data to be transmitted if at all they were to be.

Okay, I understood a little about JSON. Give me an example!

 I know an example will get your understanding much better. Below is a simple example of how an object can be expressed in JSON notation. Let’s take a classical example of a Person object, and expressing myself as an object.

{

   “firstName”: “Rakki”,

   “lastName”:”Muthukumar”,

   “department”:”Microsoft PSS”,

   “address”: {

      “addressline1”: “Microsoft India GTSC”,

      “addressline2”: “PSS - DSI”,

      “city”: “Bangalore”,

      “state”: “Karnataka”,

      “country”: “India”,

      “pin”: 560028

   }

   “technologies”: [“IIS”, “ASP.NET”,“JavaScript”,“AJAX”]

}

In the above example, address is another object inside my Person, and technologies is an array or strings.