FindControl in InsertItem of RadGrid with FormTemplate(EditForm Template)

[siva sankaran]

<p><telerik:RadGrid ID="SampleGrid"  GridLines="None" runat="server" AllowAutomaticDeletes="false"<br>                              AllowPaging="True" PageSize="10" AllowAutomaticInserts="false" AllowAutomaticUpdates="false"<br>                              AutoGenerateColumns="False" MasterTableView-EditMode="EditForms" ShowFooter="false"<br>                              MasterTableView-CommandItemSettings-ShowRefreshButton="false"<br>                              OnNeedDataSource="SampleGrid_NeedDataSource" OnInsertCommand="SampleGrid_InsertCommand"<br>                              OnItemCommand="SampleGrid_ItemCommand" OnUpdateCommand="SampleGrid_UpdateCommand" OnItemDataBound="SampleGrid_ItemDataBound"<br>                              Width="100%"><br>                              <PagerStyle Mode="NextPrevAndNumeric" /><br>                              <MasterTableView Width="100%" CommandItemDisplay="Top" HorizontalAlign="NotSet" AutoGenerateColumns="False"<br>                                  DataKeyNames="ID" Caption="Sample" ><br>                                  <Columns></p><p><telerik:GridTemplateColumn HeaderText="Action" AllowFiltering="false"><br>                                          <ItemTemplate><br>                                              <asp:ImageButton ID="ImgBtnEdit" runat="server" CommandName="Edit" CausesValidation="False"<br>                                                  ImageUrl="../Images/icons/page-edit.png" ToolTip="Edit" ImageAlign="AbsMiddle"><br>                                              </asp:ImageButton><br>                                          </ItemTemplate><br>                                          </telerik:GridTemplateColumn></p><p>  <telerik:GridBoundColumn DataField="NAME" HeaderText="Name" UniqueName="NAME"<br>                                          ItemStyle-Width="120px"><br>                                      </telerik:GridBoundColumn></p><p>  </Columns><br>                                  <EditFormSettings EditFormType="Template"><br>                                      <FormTemplate></p><p><table class="detailtable" cellspacing="2" cellpadding="1" width="100%" border="0"<br>                rules="none" style="border-collapse: collapse;"><br>                <tr><br>                    <td class="detaillabel"><br>                        Brand:<br>                    </td><br>                    <td><br>                         <telerik:RadComboBox ID="Name" runat="server" Width="250px"   AllowCustomText="true" EmptyMessage="Select" EnabledStyle-HorizontalAlign="Right"><br>                                                       </telerik:RadComboBox><br>                    </td><br>                </tr><br>            </table><br>        </div><br>    </FormTemplate><br></EditFormSettings></p>  </MasterTableView><br>                              <GroupingSettings CaseSensitive="false" ShowUnGroupButton="true" /><br>                              <ClientSettings EnableRowHoverStyle="true" AllowDragToGroup="true" ReorderColumnsOnClient="true"<br>                                  AllowGroupExpandCollapse="true" AllowColumnsReorder="true"><br>                                  <Selecting AllowRowSelect="True" EnableDragToSelectRows="true" /><br>                              </ClientSettings><br><br>                          </telerik:RadGrid><br>

 

I want to find the ComboBox and bind combo box with some values so that While inserting record , the end user can choose a value to insert or save

<p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;"></code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;"> protected void SumInsGrid_ItemDataBound(object sender, GridItemEventArgs e)<br>        {<br><br>            GridDataItem dataItem = e.Item as GridDataItem;<br><br>            if (e.Item is GridEditFormInsertItem)<br>            {<br>                RadComboBox Name = (RadComboBox)e.Item.FindControl("Name");<br>                BindComboBox(Name);<br>            }</code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;">            else if (e.Item is GridEditFormItem && e.Item.IsInEditMode)<br>            {</code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;">                     ...........</code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;">                     RadComboBox Name = (RadComboBox)e.Item.FindControl("Name");<br style="color: rgb(0, 0, 0); font-family: monospace;">                     BindComboBox(Name);</code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;">                     ...</code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;">            }</code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;">    }</code></span></span></p><p style=" background-color: #fff;"><span style=" "><span style=" margin-left: 0px !important;"><code style="color: #000;"></code></span></span></p>

 

While Editing findControl method works by returning the ComboBox object but not While Inserting. I want to bind values programmatically to the RadComboBox. 

[siva sankaran]

Sorry., Formatting is a mess

aspx code is here http://pastebin.com/uTxsvuqF

Code behind is here http://pastebin.com/4nKAC61M

[Eyup]

Hello Siva,

The most straightforward way of achieving combo editing is placing a combo control inside the EditItemTemplate of GridTemplateColumn or FormTemplate:
http://demos.telerik.com/aspnet-ajax/grid/examples/columns-rows/columns/column-types/defaultcs.aspx

And make avail of the SelectedValue property and the Bind expression:
http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/form-template-update/defaultcs.aspx
https://msdn.microsoft.com/en-us/library/vstudio/ms178366%28v=vs.100%29.aspx

Alternatively, you can use GridDropDownColumn:
http://demos.telerik.com/aspnet-ajax/grid/examples/columns-rows/columns/column-types/defaultcs.aspx
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/columns/column-types#griddropdowncolumn

The GridDropDownColumn generates a combo control only during insert or edit mode:
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/how-to/customize-griddropdowncolumn

Therefore, you can access it only during these modes:
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/rows/accessing-cells-and-rows#accessing-controls-in-editinsert-mode

If you use GridTemplateColumn approach, you can also bind the combo using its DataBinding event handler:
http://www.telerik.com/forums/grid-filter-contains-not-finding-anything#ZhplbQLMI0iOiGnkWdM0OQ

I hope this will prove helpful.

Regards,
Eyup
Telerik by Progress