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Editorial Team
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Asked: 2026-06-14T08:53:29+00:00

I have a GridView with more than 30 columns. Most are plain controls but

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I have a GridView with more than 30 columns. Most are plain controls but for some I have added a template control (DropDownList, Calendar and CheckBox control). Here is the aspx code for the control in question

     <asp:TemplateField HeaderText="Field1 Caption" SortExpression="Field1">
         <ItemTemplate>
            <asp:Label ID="lblConstructionArea" runat="server" Text='<%# Eval("Field1") %>'></asp:Label>
         </ItemTemplate>
         <EditItemTemplate>
              <asp:DropDownList ID="ddlField1" EnableViewState="true" runat="server"></asp:DropDownList>
          </EditItemTemplate>
      </asp:TemplateField>

I wanted a dropdown to be shown on the column when a user clicked on Edit. So I add this code (and the above EditItemTemplate)

  protected void gvData_RowEditing(object sender, GridViewEditEventArgs e)
    {
        string fieldOne = CommonUtils.ExtractControlValue(e,"lblField1",gvData);

        gvData.SelectedIndex = e.NewEditIndex;
        gvData.EditIndex = e.NewEditIndex;
        gvData.DataBind();

        BindGridDropDownData(e, CommonUtils.GetConstructionAreas() ,"ddlConstructionArea", constructionArea, "Field1", fieldOne);
    }

In the above code I am getting the current available and passing it to another method so that when the dropdown is displayed the selected index can be shown accurately. After this I do a change on the dropdownlist and click on the “Update button” on the GridView and the following event is triggered

   protected void gvData_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        int rowEditIndex = e.RowIndex;
        GridViewRow gRow = gvData.Rows[rowEditIndex];


        DropDownList ddlConstructionArea = (DropDownList) gvData.Rows[rowEditIndex].FindControl("ddlConstructionArea"); //This does not work

        ddlConstructionArea = (DropDownList)gRow.FindControl("ddlConstructionArea");//This does not work 

        ddlConstructionArea = (DropDownList)gvData.Rows[rowEditIndex].Cells[7].FindControl("ddlConstructionArea");//this does not work either
        gvData.EditIndex = -1;//this works and the text boxes disappear
        gvData.DataBind();//this works and the old data shows up on the gridview
    }

I am curious as to how to do an update on a Grid where I have the binding is runtime.

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1 Answer

  1. Editorial Team

    The problem was with the way the grid was being bound. I had written code to refresh the grid on page load and anytime I clicked on the Edit button the page was being refreshed and the grid binding was getting triggered instead of the updating event. I removed the code refreshing the grid on page load and put it in the places where it is needed and the order of events were getting triggered the way I would want it to and the update worked perfectly without a problem.

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