In this article I’m going to explain how to use CheckBox control in Gridview to Check or Uncheck all checkbox using JavaScript

        To implement this concept we have to use one Checkbox control in Gridview header template and one more checkbox control in Gridview item template.   And we need to use javascript to avoid postback and change gridview row color if checkbox was checked or unchecked.

        Here I’m going to write two javascript functions for check or uncheck row and check or uncheck all row in gridview

Table Design: 

Column Name

Data Type

empid

varchar(50)

name

varchar(100)

designation

varchar(100)

city

varchar(50)

Create table script:

CREATE TABLE [dbo].[EmployeeDetails](

     [empid] [varchar](50) NULL,

     [name] [varchar](100) NULL,

     [designation] [varchar](100) NULL,

     [city] [varchar](50) NULL,

     [country] [varchar](50) NULL

) ON [PRIMARY]


Designer Source Code:

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title>Chckbox in Gridview</title>

    <script type="text/javascript">

        function CheckRow(objRef) {

            //Get the Row based on checkbox

            var row = objRef.parentNode.parentNode;

            if (objRef.checked) {

                //Change the gridview row color when checkbox checked change

                row.style.backgroundColor = "#5CADFF";

            }

            else {

                //If checkbox not checked change default row color

                if (row.rowIndex % 2 == 0) {

                    //Alternating Row Color

                    row.style.backgroundColor = "#AED6FF";

                }

                else {

                    row.style.backgroundColor = "white";

                }

            } 

            //Get the reference of GridView

            var GridView = row.parentNode; 

            //Get all input elements in Gridview

            var inputList = GridView.getElementsByTagName("input"); 

            for (var i = 0; i < inputList.length; i++) {

                //The First element is the Header Checkbox

                var headerCheckBox = inputList[0]; 

                //Based on all or none checkboxes

                //are checked check/uncheck Header Checkbox

                var checked = true;

                if (inputList[i].type == "checkbox" && inputList[i]

                                               != headerCheckBox) {

                    if (!inputList[i].checked) {

                        checked = false;

                        break;

                    }

                }

            }

            headerCheckBox.checked = checked; 

        } 

        function checkAllRow(objRef) {

            var GridView = objRef.parentNode.parentNode.parentNode;

            var inputList = GridView.getElementsByTagName("input");

            for (var i = 0; i < inputList.length; i++) {

                //Get the Cell To find out ColumnIndex

                var row = inputList[i].parentNode.parentNode;

                if (inputList[i].type == "checkbox" && objRef

                                                != inputList[i]) {

                    if (objRef.checked) {

                        //If the header checkbox is checked

                        //check all checkboxes

                        //and highlight all rows

                        row.style.backgroundColor = "#5CADFF";

                        inputList[i].checked = true;

                    }

                    else {

                        //If the header checkbox is checked

                        //uncheck all checkboxes

                        //and change rowcolor back to original

                        if (row.rowIndex % 2 == 0) {

                            //Alternating Row Color

                            row.style.backgroundColor = "#AED6FF";

                        }

                        else {

                            row.style.backgroundColor = "white";

                        }

                        inputList[i].checked = false;

                    }

                }

            }

        }

    </script>

</head>

<body>

<form id="form1" runat="server">

<div>

<asp:GridView ID="gvUpload" runat="server" AutoGenerateColumns="false"  ShowFooter="true">

<Columns>

    <asp:TemplateField>

        <HeaderTemplate>

            <asp:CheckBox ID="chkSelectAll" runat="server"  onclick="checkAllRow(this);" />

        </HeaderTemplate>

        <ItemTemplate>

            <asp:CheckBox ID="chkSelectRow" runat="server"  onclick="CheckRow(this);" />

        </ItemTemplate>

    </asp:TemplateField>

    <asp:BoundField DataField="empid" HeaderText="Employee-ID" />   

    <asp:BoundField DataField="name" HeaderText="Name" />    

<asp:BoundField DataField="designation" HeaderText="Designation" />

    <asp:BoundField DataField="city" HeaderText="City" /> 

    <asp:BoundField DataField="country" HeaderText="Country" />

</Columns>

<HeaderStyle BackColor="#0063A6" ForeColor="White" />

</asp:GridView>

<asp:Label ID="lblMsg" runat="server"></asp:Label>

</div>

</form>

</body>

</html>

 

Code Behind:

 

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;

public partial class _Default : System.Web.UI.Page

{

    SqlConnection conn = new SqlConnection("Data Source=SPIDER;Initial Catalog=Demo;

                                                         Integrated Security=True");

    protected void Page_Load(object sender, EventArgs e)

    {       

        if (!IsPostBack)

        {           

            BindGrid();

        }

    }

 

    protected void BindGrid()

    {

        DataSet ds = new DataSet();       

        conn.Open();

        string cmdstr = "Select * from EmployeeDetails";

        SqlCommand cmd = new SqlCommand(cmdstr, conn);

        SqlDataAdapter adp = new SqlDataAdapter(cmd);

        adp.Fill(ds);

        cmd.ExecuteNonQuery();

        gvUpload.DataSource = ds;

        gvUpload.DataBind();

        conn.Close();

    }

}

 

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View demo Download
http://www.dotnetfox.com/Document/1010/0Demo1.gif

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