Add a Checkbox in ASP GridView with the Select All Functionality

Introduction

This code will show you how to add a checkbox in ASP Gridview with the select all functionality. It also shows how to get selected checkbox Gridview row values. I have added only two columns in Gridview, but you can use the code as per your requirement.

 

Code

 

.aspx page code

 

Add a Javascript reference to your page:

<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
   $(document).ready(function () {
      var headerChk = $(".chkHeader input");
      var itemChk = $(".chkItem input");
         headerChk.click(function () {
            itemChk.each(function () {
               this.checked = headerChk[0].checked;
         })
   });
   itemChk.each(function () {
         $(this).click(function () {
            if (this.checked == false)
            {
               headerChk[0].checked = false;
             }
            })
         });
   });
</script>

<asp:GridView ID="gvdashboard" ClientIDMode="Static" runat="server" class="table table-striped"
AutoGenerateColumns="False" GridLines="None" CellPadding="4" ForeColor="#333333">
<AlternatingRowStyle BackColor="White" />
   <Columns>
      <asp:TemplateField ItemStyle-Width="10px" HeaderStyle-Width="10px">
         <HeaderTemplate>
            <asp:CheckBox ID="chkSelectAll" CssClass="chkHeader" runat="server" />
         </HeaderTemplate>
      <ItemTemplate>
      <asp:CheckBox ID="chkRow" CssClass="chkItem" runat="server" />
      </ItemTemplate>
      <HeaderStyle Width="10px"></HeaderStyle>
         <ItemStyle Width="10px"></ItemStyle>
     </asp:TemplateField>
     <asp:BoundField DataField="ID" HeaderText="ID" ></asp:BoundField>
     <asp:BoundField DataField="Name" HeaderText="Name"></asp:BoundField>
</Columns>
   <EditRowStyle BackColor="#2461BF" />
   <FooterStyle BackColor="#507CD1" ForeColor="White" Font-Bold="True" />
   <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
   <PagerStyle CssClass="pagination" BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
   <RowStyle BackColor="#EFF3FB" />
   <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
   <SortedAscendingCellStyle BackColor="#F5F7FB" />
   <SortedAscendingHeaderStyle BackColor="#6D95E1" />
   <SortedDescendingCellStyle BackColor="#E9EBEF" />
   <SortedDescendingHeaderStyle BackColor="#4870BE" />
</asp:GridView>

.aspx.cs page code 

foreach (GridViewRow row in gvdashboard.Rows)
{
   if (row.RowType == DataControlRowType.DataRow)
      {
         CheckBox chkRow = (row.Cells[0].FindControl("chkRow") as CheckBox);
      if (chkRow.Checked)
      {
         // do whatever your logic
      }
   }
}