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Asked: 2026-05-26T23:33:12+00:00

I placed a GridView inside an update panel. <asp:UpdatePanel ID=UpdatePanel4 UpdateMode=Conditional ChildrenAsTriggers=true runat=server> <asp:GridView

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I placed a GridView inside an update panel.

<asp:UpdatePanel ID="UpdatePanel4" UpdateMode="Conditional" ChildrenAsTriggers="true"
                runat="server">
                        <asp:GridView ID="GridView_Overview" OnRowCommand="GridView_Layout_RowCommand" />
</asp:GridView>
</asp:UpdatePanel>

When the user press a button, the gridView will be filled up with a datatable:

GridView_Overview.DataSource = dataTable;
GridView_Overview.DataBind();

The dataTable contains more than 10000 records. Therefore, the binding process to the gridview took about 3,4 seconds.

When a row is selected in the gridview:

protected void GridView_Layout_RowCommand(object sender, GridViewCommandEventArgs e)
 {if (e.CommandName.Equals("Select"))
      {
          int index = Convert.ToInt32(e.CommandArgument);
          GridViewRow row = this.GridView_Overview.Rows[index];
          Int64 pID = Int64.Parse(((Label)row.FindControl("ID")).Text); // abc
      }
 }

It took 5,6 seconds to perform GridView_Layout_RowCommand as above. What is the issue here? How can I improve the performance of selecting a row. If I discard the //abc code line then it is fast but then I can not get the ID value for further process.

Thanks in advance.

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1 Answer

  1. Editorial Team

    This problem is occurring because the asynchronous postback from the UpdatePanel will be triggered only after walking through the entire DOM. If you’re adding over 10000 records to the page then your DOM is going to be huge and the delay will be significant.

    The key to solving your problem is destroying the GridView DOM elements before the postback is triggered. This way, there will be much less DOM to be traversed.

    See this blog post for some tips on handling the situation: Slow performance of a GridView inside an UpdatePanel

    At the very least, including even the most basic form of paging will improve client-side performance as it will reduce the number of DOM elements added to the page. For maximum results, you’ll want to have a solution that also only selects each page of data so that you don’t need to return 10000 records but only display a subset.

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