How to Find Gridview Control on Button Click in Asp.Net C#

In this article I will show you how you can detect checkbox checked which is present in gridview using c#.net in asp.net on button click event.

Some of my previous articles are as follows: Nested GridView Using c#.Net In Asp.Net, Read XML File in Dataset And Bind To GridView In Asp.Net Using C#.Net, Bind XML File Data to Gridview By Category and SubCategory in Asp.Net Using C#.Net, Comment System OR Form and Display In GridView Using C# In Asp.Net, Hide Or Show Gridview Column By Column Index at RunTime In Asp.Net Using C#.Net, Hide Or Show Gridview Row By Column Name at RunTime In Asp.Net Using C#.Net, Display Grand Total In Gridview Footer On RowDataBound In Asp.Net Using C#.Net.

So for this article first we will create a new asp.net application and add a gridview control in it.

<asp:GridView ID="gvApproveRejectAdds" runat="server" CssClass="gridtable" AllowPaging="True"                  ShowHeaderWhenEmpty="True" EmptyDataText="No records found"                     AutoGenerateColumns="False" PageSize="10" Width="100%"                      onpageindexchanging="gvApproveRejectAdds_PageIndexChanging">                     <Columns>                                                 <asp:TemplateField HeaderText="SELECT">                             <HeaderTemplate>                                <input id="chkSelectAll" type="checkbox" />                             </HeaderTemplate>                             <ItemTemplate>                                 <asp:CheckBox ID="chkItem" runat="server" CssClass="chkItem"/>                             </ItemTemplate>                               <ItemStyle Width="50px" />                         </asp:TemplateField>                         <asp:TemplateField HeaderText="ADD LINK">                             <ItemTemplate>                                 <a href='detail.aspx?id=<%#Eval("PostId") %>' target="_blank"> <%#Eval("Title")%></a>                                 <asp:HiddenField ID="hfId" runat="server" Value='<%#Eval("PostId") %>'/>                             </ItemTemplate>                              <ItemStyle Width="200px" />                         </asp:TemplateField>                         <asp:TemplateField HeaderText="DETAIL">                             <ItemTemplate>                                 <asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine" Width="100%" Height="30px"                                     Text='<%#Eval("RequestDetail") %>'></asp:TextBox>                             </ItemTemplate>                             <ItemStyle Width="200px" />                         </asp:TemplateField>                     </Columns>                     <PagerSettings Position="TopAndBottom" />                 </asp:GridView>

Now add the below code on button click event.

protected void bthApproveall_Click(object sender, EventArgs e)         {             string postId = "";             foreach (GridViewRow row in gvApproveRejectAdds.Rows)             {                 CheckBox chkPostItem = (CheckBox)row.FindControl("chkItem");                 HiddenField txtPostId = (HiddenField)row.FindControl("hfId");             }         }

Now run the application to check the output. Here is the output what you get when you execute the code.