数据列表项命令事件不起作用

Question

I am trying to work on itemcommand event of datalist. I want to work with the button that is bind in datalist. But when i add a breakpoint on the itemcommand event the event doesnot run.Please tell me why it is not working here is the datalist source and my code

<asp:DataList ID="DataList1" runat="server" RepeatDirection="Horizontal" 
            onitemcommand="DataList1_ItemCommand1" >
        <ItemTemplate>
         <ul>
        <li>
    <a href="#"><asp:Image ID="Image1" runat="server" ImageUrl='<%#Eval("pictureurl") %>' Width="170px" Height="104px" /></a><br /><br />
        <asp:Label ID="Label1" runat="server" Text='<%#Eval("fullname") %>'></asp:Label><br />
                <asp:ImageButton ID="ImageButton2" runat="server" ImageUrl="~/images/Icons/accept1.png" CommandName="Accept"   />&nbsp;<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/Icons/decline.png"   />&nbsp;

        </li>
        </ul>
        </ItemTemplate>
        </asp:DataList>

Code:

  if (e.CommandName == "Accept")
        {
            string id = DataList1.DataKeys[e.Item.ItemIndex].ToString() ;

            SqlCommand CmdAcceptRequest = new SqlCommand("Update FriendRequest set requeststatus='Accept' where RequestFrom='" + id + "'", con);
            CmdAcceptRequest.CommandType = CommandType.Text;
            CmdAcceptRequest.ExecuteNonQuery();
            CmdAcceptRequest.Dispose();



         }

This code is not working for me. Item command event is not working Please experts tell me where i am wrong

Answer 1

I assume that you are databinding the DataList on every postback. Check the IsPostNack property, eg:

protected void Page_Load(Object sender, EventArgs e)
{
    if(!IsPostBack)
    {
         DataBindDataList();
    }
}

private void DataBindDataList()
{
    var dataSource = getSource(); // some data
    DataList1.DataSource = dataSource;
    DataList1.DataBind();
}

Otherwise events won't be triggered if you DataBind a webdatabound control to it's DataSource again. This is true only for manually databound controls not for declarative datasource controls like SqlDataSource or ObjectDataSource .