C# : row-clickable GridView and get and set gridview rows using JavaScript

Complete C# code:
----------------

using System;
using System.ComponentModel;
using System.Configuration;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace CustomGridView
{
/// <summary>
/// Summary description for ClickableGridView
/// </summary>
public class ClickableGridView : GridView
{
public string RowCssClass
{
get
{
string rowClass = (string)ViewState["rowClass"];
if (!string.IsNullOrEmpty(rowClass))
return rowClass;
else
return string.Empty;
}
set
{
ViewState["rowClass"] = value;
}
}

public string HoverRowCssClass
{
get
{
string hoverRowClass = (string)ViewState["hoverRowClass"];
if (!string.IsNullOrEmpty(hoverRowClass))
return hoverRowClass;
else
return string.Empty;
}
set
{
ViewState["hoverRowClass"] = value;
}
}

private static readonly object RowClickedEventKey = new object();

public event GridViewRowClicked RowClicked;
protected virtual void OnRowClicked(GridViewRowClickedEventArgs e)
{
if (RowClicked != null)
RowClicked(this, e);
}

protected override void RaisePostBackEvent(string eventArgument)
{
if (eventArgument.StartsWith("rc"))
{
int index = Int32.Parse(eventArgument.Substring(2));
GridViewRowClickedEventArgs args = new GridViewRowClickedEventArgs(Rows[index]);
OnRowClicked(args);
}
else
base.RaisePostBackEvent(eventArgument);
}

protected override void PrepareControlHierarchy()
{
base.PrepareControlHierarchy();

for (int i = 0; i < Rows.Count; i++)
{
string argsData = "rc" + Rows[i].RowIndex.ToString();
Rows[i].Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(this, argsData));

if (RowCssClass != string.Empty)
Rows[i].Attributes.Add("onmouseout", "this.className='" + RowCssClass + "';");

if (HoverRowCssClass != string.Empty)
Rows[i].Attributes.Add("onmouseover", "this.className='" + HoverRowCssClass + "';");
}
}
}

public class GridViewRowClickedEventArgs : EventArgs
{
private GridViewRow _row;

public GridViewRowClickedEventArgs(GridViewRow aRow)
: base()
{
_row = aRow;
}

public GridViewRow Row
{
get
{ return _row; }
}
}

public delegate void GridViewRowClicked(object sender, GridViewRowClickedEventArgs args);
}

I am having following example to access gridview rows and columns using JAVA Script. You
can call setCellValue to set the value of selected row/column cell.

<script language="javascript" type="text/javascript">
var gridViewCtlId = '<%=ctlGridView.ClientID%>';
var gridViewCtl = null;
var curSelRow = null;
var curRowIdx = -1;
function getGridViewControl()
{
if (null == gridViewCtl)
{
gridViewCtl = document.getElementById(gridViewCtlId);
}
}

function onGridViewRowSelected(rowIdx)
{
var selRow = getSelectedRow(rowIdx);
if (null != selRow)
{
curSelRow = selRow;
var cellValue = getCellValue(rowIdx, 0);
alert(cellValue);
}
}

function getSelectedRow(rowIdx)
{
return getGridRow(rowIdx);
}

function getGridRow(rowIdx)
{
getGridViewControl();
if (null != gridViewCtl)
{
return gridViewCtl.rows[rowIdx];
}
return null;
}

function getGridColumn(rowIdx, colIdx)
{
var gridRow = getGridRow(rowIdx);
if (null != gridRow)
{
return gridRow.cells[colIdx];
}
return null;
}

function getCellValue(rowIdx, colIdx)
{
var gridCell = getGridColumn(rowIdx, colIdx);
if (null != gridCell)
{
return gridCell.innerText;
}
return null;
}
function setCellValue(rowIdx, colIdx)
{
var gridCell = getGridColumn(rowIdx, colIdx);

gridCell.innerText = "Your value";

}

</script>

Regards