template field column of gridview is being created on each click

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this is aspx code in which I put a grid view in ajax panel.

XML

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

        <asp:ScriptManager ID="ScriptManager1" runat="server">
            </asp:ScriptManager>

            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
            <asp:GridView ID="GridView1" runat="server" DataKeyNames="head_code" >
            </asp:GridView>
            
            </ContentTemplate>
            </asp:UpdatePanel>

        </div>
        </form>
    </body>

Following is code behind:

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace gridview_button
{

    public partial class WebForm2 : System.Web.UI.Page, ITemplate
    {

        protected void Page_Load(object sender, EventArgs e)
        {
            hitechLatestEntities database = new hitechLatestEntities();
            GridView1.DataSource = database.HEADs;

            TemplateField tfObject = new TemplateField();
            tfObject.HeaderText = "Sub-Head";

            tfObject.ItemTemplate = new WebForm2(ListItemType.Item);

            GridView1.Columns.Add(tfObject);
            GridView1.DataBind();

        }

       /////////////////////////////// For template field //////////////////////////////////

        public WebForm2()
        {
        }

        public WebForm2(ListItemType Item)
        {
            myListItemType = Item;
        }

        private ListItemType myListItemType;

        public void InstantiateIn(Control container)
        {

            if (myListItemType == ListItemType.Item)
            {
                Button btn = new Button();
                container.Controls.Add(btn);
            }
        }

      ////////////////////////////////////////////////////////////////////////////////////
    }

}

I have created template field dynamically and Above code is working fine but only problem is that every time when i click on button in template field, a new blank template field column appears with same header text. Even ajax is not working for me.
or
can anyone tell me how to add btn to UpdatePanel1 dynamically??

Posted 30-Jan-14 1:30am

Basit Elahi

Updated 30-Jan-14 2:14am

v6

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Comments

Tom Marvolo Riddle 30-Jan-14 7:48am

I'm not sure try with toolscriptmanager

1 solution

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King Fisher · Answer 1 · 2014-01-30T01:44:00

Solution 1

C#

<asp:updatepanel id="UpdatePanel1" updatemode="Conditional" runat="server" xmlns:asp="#unknown">
  </asp:updatepanel>

Posted 30-Jan-14 1:44am

King Fisher