title: radGrid control not showing data in aspx page
body: <p>I have an asp.net application (created by a previous developer) that uses a RadGrid control to display data. However, the RadGrid does not show data if there is an  on the page. The radGrid works fine soon as I remove the UpdatePanel. If I remove the Updatepanel, then RadCombobox makes a whole page submit (instead of using Ajax).   </p>
  
  <p>Is there anyway to make radGrid and  work together?   </p>
  
  <pre><code>    &lt;asp:UpdatePanel ID="upnlFilter" runat="server" UpdateMode="Conditional"&gt;
          &lt;ContentTemplate&gt;
              &lt;span class="subHeader"&gt;VTRIP Log Search:  &lt;/span&gt;
              &lt;asp:Panel ID="Panel1" runat="server" BorderColor="#E3B391" BorderStyle="Solid" 
                  BorderWidth="1" Width="994px"&gt;
                  &lt;div style="height:10px; width:994px"&gt;
                  &lt;/div&gt;                  
                      &lt;table style="width: 974px; margin: 10px" border="0"&gt;                                          
                      &lt;tr&gt;
                          &lt;td width="200px"&gt;
                              &lt;telerik:RadComboBox ID="DriverDD" runat="server" Height="120px" Width="180px"
                                  DropDownWidth="180px" EmptyMessage="Choose a Driver" 
                                  HighlightTemplatedItems="true" AutoPostBack="true" 
                                  AppendDataBoundItems="true"
                                  onselectedindexchanged="DriverDD_SelectedIndexChanged" &gt;
                              &lt;/telerik:RadComboBox&gt;
                          &lt;/td&gt;
  
                          &lt;td width="220px"&gt;
                              &lt;asp:TextBoxWatermarkExtender ID="TextBoxWatermarkExtender1" runat="server" TargetControlID="txtDOS"
                                  WatermarkText="Select today or any previous day" WatermarkCssClass="watermarked"&gt;
                              &lt;/asp:TextBoxWatermarkExtender&gt;
                              &lt;asp:TextBox ID="txtDOS" runat="server" Width="200px" EnableViewState="true" CssClass="SetTextbox"
                                  Height="20px" BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px"&gt;&lt;/asp:TextBox&gt;
                              &lt;asp:CalendarExtender ID="txtDOS_CalendarExtender" runat="server" Enabled="True" 
                                  TargetControlID="txtDOS"&gt;
                              &lt;/asp:CalendarExtender&gt;
                          &lt;/td&gt;
                          &lt;td style="width:350px"&gt;&amp;nbsp;&lt;/td&gt;
                      &lt;/tr&gt;
                   &lt;/table&gt;
          &lt;/asp:Panel&gt;
      &lt;/ContentTemplate&gt;
  &lt;/asp:UpdatePanel&gt;   
  
      &lt;br/&gt;   
          &lt;telerik:RadGrid ID="RadGrid1" OnSortCommand="RadGrid1_SortCommand" 
  OnPageIndexChanged="RadGrid1_PageIndexChanged"
              Width="99%" Height="181px" OnPageSizeChanged="RadGrid1_PageSizeChanged" AllowSorting="True"
              PageSize="5" AllowPaging="True" AllowMultiRowSelection="True" runat="server"
              GridLines="None" AutoGenerateColumns="False"&gt;
              &lt;MasterTableView Height="100px" Width="100%" Summary="RadGrid table"&gt;
                  &lt;CommandItemSettings ExportToPdfText="Export to PDF" /&gt;
                  &lt;RowIndicatorColumn FilterControlAltText="Filter RowIndicator column" 
                      Visible="True"&gt;
                  &lt;/RowIndicatorColumn&gt;
                  &lt;ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column" 
                      Visible="True"&gt;
                  &lt;/ExpandCollapseColumn&gt;
                  &lt;Columns&gt;
                      &lt;telerik:GridBoundColumn DataField="TripId" HeaderText="Trip ID" SortExpression="TripID"
                          UniqueName="TripID"  
                          SortAscImageUrl="SortAsc.gif" SortDescImageUrl="SortDesc.gif"&gt;
                      &lt;/telerik:GridBoundColumn&gt;
                      &lt;telerik:GridBoundColumn DataField="MemberName" HeaderText="Member Name" SortExpression="MemberName"
                          UniqueName="MemberName"  
                          SortAscImageUrl="SortAsc.gif" SortDescImageUrl="SortDesc.gif"&gt;
                      &lt;/telerik:GridBoundColumn&gt;
                      &lt;telerik:GridBoundColumn DataField="VehicleType" HeaderText="Vehicle Type" SortExpression="VehicleType"
                          UniqueName="VehicleType"
                          SortAscImageUrl="SortAsc.gif" SortDescImageUrl="SortDesc.gif"&gt;
                      &lt;/telerik:GridBoundColumn&gt;
                      &lt;telerik:GridBoundColumn DataField="Status" HeaderText="Status" SortExpression="Status"
                          UniqueName="Status"  
                          SortAscImageUrl="SortAsc.gif" SortDescImageUrl="SortDesc.gif"&gt;
                      &lt;/telerik:GridBoundColumn&gt;
                  &lt;/Columns&gt;
                  &lt;EditFormSettings&gt;
                      &lt;EditColumn FilterControlAltText="Filter EditCommandColumn column"&gt;
                      &lt;/EditColumn&gt;
                  &lt;/EditFormSettings&gt;
                  &lt;PagerStyle PageSizeControlType="RadComboBox" /&gt;
              &lt;/MasterTableView&gt;
              &lt;PagerStyle Mode="NextPrevAndNumeric"&gt;&lt;/PagerStyle&gt;
              &lt;FilterMenu EnableImageSprites="False"&gt;
              &lt;/FilterMenu&gt;
          &lt;/telerik:RadGrid&gt;
  </code></pre>
  
  <p>Code behind: (populate grid using <a href="http://demos.telerik.com/aspnet-ajax/grid/examples/programming/simplebinding/defaultcs.aspx" rel="nofollow">Grid - Simple Data Binding</a>)  </p>
  
  <pre><code>private void LoadData()
  {
      if (Session["TripMaster"] != null)
      {
          RadGrid1.DataSource = Session["TripMaster"];
          RadGrid1.DataBind();
      }
  }
  </code></pre>