hi,
i have nested datalist ,
i want select all checkbox jquery code when we click on sub header .
can any one help me.
i am posting my code ,please help me
 
thanks in advance
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Example3.aspx.cs"
    Inherits="Example3" %>
<!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 id="Head1" runat="server">
    <title></title>
    <style type="text/css">
        
        
        .btnStyle1
        {
            color: white;
            border: 1px solid #3E84F5;
            background-color: #5896D2;
            font-weight: bold;
            font-family: Verdana;
        }
        .btnStyle1:hover
        {
            color: white;
            border: 1px solid #3E84F5;
            background-color: #00AFF0;
            font-weight: bold;
            font-family: Verdana;
            cursor: pointer;
        }
        .allcaps
        {
            text-transform: uppercase;
        }
        input.twitterStyleTextbox
        {
            border: 1px solid #c4c4c4;
            font-size: 12px;
            padding: 4px 4px 4px 4px;
            border-radius: 4px;
            -moz-border-radius: 4px;
            -webkit-border-radius: 4px;
            box-shadow: 0px 0px 8px #d9d9d9;
            -moz-box-shadow: 0px 0px 8px #d9d9d9;
            -webkit-box-shadow: 0px 0px 8px #d9d9d9;
        }
        
        input.twitterStyleTextbox:focus
        {
            outline: none;
            border: 1px solid #7bc1f7;
            box-shadow: 0px 0px 8px #7bc1f7;
            -moz-box-shadow: 0px 0px 8px #7bc1f7;
            -webkit-box-shadow: 0px 0px 8px #7bc1f7;
        }
    </style>
    <style type="text/css">
        body
        {
            font-family: Arial;
            font-size: 10pt;
        }
        .table
        {
            border: 1px solid #ccc;
            border-collapse: collapse;
            background-color: #fff;
            width: 190px;
        }
        .table th
        {
            background-color: #B8DBFD;
            color: #333;
            font-weight: bold;
        }
        .table td:first-child
        {
            font-weight: bold;
        }
        .table th, .table td
        {
            padding: 5px;
            border: 1px solid #ccc;
        }
        .table, .table table td
        {
            border: 0px solid #ccc;
        }
    </style>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">
        $(function () {
            // For Main Select All
            $("[id*=chk_Select_All]").click(function () {
                if ($(this).is(":checked")) {
                    $("[id*=DataList_Main] [id*=chk_Header]").attr("checked", "checked");
                    $("[id*=DataList_Main] [id*=chk_Row]").attr("checked", "checked");
                } else {
                    $("[id*=DataList_Main] [id*=chk_Header]").removeAttr("checked");
                    $("[id*=DataList_Main] [id*=chk_Row]").removeAttr("checked");
                }
            });
            // For Sub Header Select all
            $("[id*=DataList_Main] [id*=chk_Header]").click(function () {
                if ($(this).is(":checked")) {                    
                    $("[id*=DataList_Main] [id*=chk_Row]").attr("checked", "checked");
                } else {                    
                    $("[id*=DataList_Main] [id*=chk_Row]").removeAttr("checked");
                }
            });
            // For row checkbox
            $("[id*=DataList_Main] [id*=chk_Row]").click(function () {
                if ($("[id*=DataList_Main] [id*=chk_Row]").length == $("[id*=DataList_Main] [id*=chk_Row]:checked").length) {
                    $("[id*=chk_Select_All]").attr("checked", "checked");
                } else {
                    $("[id*=chk_Select_All]").removeAttr("checked");
                }
            });
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table>
            <tr>
                <td>
                    <asp:CheckBoxList ID="CheckBoxList1" runat="server" Font-Names="Verdana" Font-Size="12px"
                        AutoPostBack="true" CellPadding="4" CellSpacing="0" Font-Underline="true" RepeatDirection="Horizontal"
                        OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged">
                    </asp:CheckBoxList>
                </td>
            </tr>
        </table>
        <br />
        <div>
            <table>
                <tr>
                    <td align="left" valign="top">
                        <asp:DataList ID="DataList_Main" runat="server" OnItemDataBound="DataList_Main_ItemDataBound"
                            >
                            <HeaderTemplate>
                                <asp:CheckBox ID="chk_Select_All" runat="server" Text="Select All" ClientIDMode="Static"/>
                            </HeaderTemplate>
                            <ItemTemplate>
                                <table align="left" cellpadding="4" cellspacing="0" rules="all" style="border: 1px solid gray;
                                    border-collapse: collapse;">
                                    <tr>
                                        <td align="left" valign="top" style="background-color: LightGray; width:25px;">
                                            <asp:CheckBox ID="chk_Header" runat="server" Checked="false" ClientIDMode="Static" />
                                        </td>
                                        <td align="center" valign="top" style="background-color: LightGray; width:100px;">
                                            <asp:Label ID="lbl_Dept_Name" runat="server" Text='<%#Eval("Dept_Name")%>' Font-Bold="true"></asp:Label>
                                        </td>
                                    </tr>
                                    <tr>
                                        <td align="left" valign="top" colspan="2">
                                            <asp:DataList ID="DataList_Child" runat="server" Width="100%">
                                                <ItemTemplate>
                                                    <table align="left" width="100%" cellpadding="4" cellspacing="0" rules="all" style="border: 1px solid gray;
                                                        border-collapse: collapse;">
                                                        <tr>
                                                            <td align="left" valign="top" style="width: 25px;">
                                                                <asp:CheckBox ID="chk_Row" runat="server" Checked="false" ClientIDMode="Static"/>
                                                            </td>
                                                            <td align="left" valign="top" style="width: 100px;">
                                                                <asp:Label ID="lbl_Emp_Name" runat="server" Text='<%#Eval("Emp_Name")%>'></asp:Label>
                                                            </td>
                                                        </tr>
                                                    </table>
                                                </ItemTemplate>
                                                <ItemStyle HorizontalAlign="Left" VerticalAlign="Top" />
                                            </asp:DataList>
                                        </td>
                                    </tr>
                                </table>
                            </ItemTemplate>
                            <ItemStyle HorizontalAlign="Left" VerticalAlign="Top" />
                        </asp:DataList>
                    </td>
                </tr>
            </table>
        </div>
    </div>
    </form>
</body>
</html>
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
public partial class Example1 : System.Web.UI.Page
{
    
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Fill_Chklst_dept();
        }
    }
    public void Fill_Chklst_dept()
    {
        DataTable dt = new DataTable("Rajesh Report1");
        dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Dept_ID", typeof(Int32)), new DataColumn("Dept_Name", typeof(String)) });
        dt.Rows.Add(1, "Account");
        dt.Rows.Add(2, "Admin");
        dt.Rows.Add(3, "Other");
        CheckBoxList1.Items.Clear();
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            CheckBoxList1.Items.Add(new ListItem(dt.Rows[i]["Dept_Name"].ToString(), dt.Rows[i]["Dept_ID"].ToString()));
        }
    }
    public DataTable Fill_Dt1()
    {
        DataTable dt = new DataTable("Rajesh Report1");
        dt.Columns.AddRange(new DataColumn[4] { new DataColumn("ID", typeof(Int32)), new DataColumn("Dept_ID", typeof(Int32)), new DataColumn("Dept_Name", typeof(String)), new DataColumn("Emp_Name", typeof(String)) });
        dt.Rows.Add(1, 1, "Account", "AAAAA");
        dt.Rows.Add(2, 1, "Account", "BBBBB");
        dt.Rows.Add(3, 1, "Account", "CCCCC");
        dt.Rows.Add(4, 2, "Admin", "PPPPP");
        dt.Rows.Add(5, 2, "Admin", "QQQQQQ");
        dt.Rows.Add(6, 3, "Other", "WWWWWW");
        dt.Rows.Add(7, 3, "Other", "RRRRRR");
        dt.Rows.Add(8, 3, "Other", "TTTTTT");
        dt.Rows.Add(9, 3, "Other", "YYYYYY");
        return dt;
    }
    protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataList_Main.DataSource = null;
        DataList_Main.DataBind();
        var selected = string.Join(", ", CheckBoxList1.Items.Cast<ListItem>().Where(li => li.Selected).Select(x => x.Value).ToArray());
        if (selected.ToString() != "")
        {
            DataTable dt = new DataTable("Rajesh Report1");
            dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Dept_ID", typeof(Int32)), new DataColumn("Dept_Name", typeof(String)) });
            dt.Rows.Add(1, "Account");
            dt.Rows.Add(2, "Admin");
            dt.Rows.Add(3, "Other");
            DataRow[] dr = dt.Select("Dept_ID in(" + selected + ")");
            DataList_Main.DataSource = dr.CopyToDataTable();
            DataList_Main.DataBind();
        }
    }
    string Dept_ID1 = "";
    int chk = 1;
    protected void DataList_Main_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item | e.Item.ItemType == ListItemType.AlternatingItem)
        {
            DataRowView drv = e.Item.DataItem as DataRowView;
            string Dept_ID = drv["Dept_ID"].ToString();
            DataList DataList_Child = e.Item.FindControl("DataList_Child") as DataList;
            DataTable dt = Fill_Dt1();
            DataRow[] dr = dt.Select("Dept_ID in(" + Dept_ID + ")");
            if (dr.Length > 0)
            {
                if (Dept_ID1.ToString() != "")
                {
                    if (Dept_ID1.ToString() != Dept_ID)
                    {
                        DataList_Main.RepeatDirection = RepeatDirection.Vertical;
                        DataList_Main.RepeatColumns = chk;
                    }
                }
                DataList_Child.DataSource = dr.CopyToDataTable();
                DataList_Child.DataBind();
            }
            Dept_ID1 = Dept_ID;
            chk++;
        }
    }
}