Get reference to control embedded in filter template code behind

[Marty]

Hi,

I'm using the following grid.  I need to get a reference to the combobox "cboGrdSysAppsFilter" that I have embedded in my filter template.  I'm not quite sure how to do it, nor can I find any articles/forum posts that directly reference this.  I've tried every way I know to access grid items, to no avail.  I'm sure it's easy, just need to be pointed in the right direction. 

Thanks,
Marty

<telerik:RadGrid OnDetailTableDataBind="GrdSysApps_DetailTableDataBind" ID="GrdSysApps"
    runat="server" OnNeedDataSource="GrdSysApps_OnNeedDataSource" AllowMultiRowSelection="True"
    ClientSettings-Scrolling-AllowScroll="true" AutoGenerateColumns="False" Width="99%"
    ClientSettings-Scrolling-ScrollHeight="150" GridLines="None" ShowGroupPanel="true"
    ClientSettings-Scrolling-SaveScrollPosition="true" ClientSettings-Scrolling-UseStaticHeaders="true"
    AllowFilteringByColumn="true" AllowSorting="true" ClientSettings-AllowColumnsReorder="false">
    <MasterTableView DataKeyNames="SystemApplicationID" ClientDataKeyNames="SystemApplicationID">
        <RowIndicatorColumn>
            <HeaderStyle Width="20px"></HeaderStyle>
        </RowIndicatorColumn>
        <ExpandCollapseColumn>
            <HeaderStyle Width="20px"></HeaderStyle>
        </ExpandCollapseColumn>
        <Columns>
            <telerik:GridBoundColumn DataField="SystemApplicationID" EmptyDataText="&amp;nbsp;"
                UniqueName="column" Visible="False">
            </telerik:GridBoundColumn>
            <custom:CustomClientSelectColumn UniqueName="SelectedRows">
                <FilterTemplate>
                    <asp:DropDownList Font-Size="X-Small" ID="cboGrdSysAppsFilter" AutoPostBack="true"
                        runat="server" OnSelectedIndexChanged="cboSelected_SelectedIndexChanged">
                        <asp:ListItem>All</asp:ListItem>
                        <asp:ListItem>Selected</asp:ListItem>
                        <asp:ListItem>Not Selected</asp:ListItem>
                    </asp:DropDownList>
                </FilterTemplate>
            </custom:CustomClientSelectColumn>
            <telerik:GridBoundColumn DataField="Name" EmptyDataText="&amp;nbsp;" HeaderText="Name"
                UniqueName="column2">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="Description" EmptyDataText="&amp;nbsp;" HeaderText="Description"
                UniqueName="column3">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="ManagerDel" EmptyDataText="&amp;nbsp;" HeaderText="Mgr Approver"
                UniqueName="column5">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="DirectorDel" EmptyDataText="&amp;nbsp;" HeaderText="Dir Approver"
                UniqueName="column9">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="Director2Del" EmptyDataText="&amp;nbsp;" HeaderText="Dir2 Approver"
                UniqueName="column6">
            </telerik:GridBoundColumn>
        </Columns>
        <DetailTables>
            <telerik:GridTableView DataKeyNames="SystemApplicationID" HierarchyLoadMode="ServerOnDemand"
                AllowSorting="false" AllowFilteringByColumn="false" Name="OriginalOwners">
                <ParentTableRelation>
                    <telerik:GridRelationFields MasterKeyField="SystemApplicationID" DetailKeyField="SystemApplicationID" />
                </ParentTableRelation>
                <Columns>
                    <telerik:GridBoundColumn HeaderText="Default System Manager" HeaderButtonType="TextButton"
                        DataField="Manager">
                    </telerik:GridBoundColumn>
                    <telerik:GridBoundColumn HeaderText="Default System Director" HeaderButtonType="TextButton"
                        DataField="Director">
                    </telerik:GridBoundColumn>
                    <telerik:GridBoundColumn HeaderText="Default System 2nd Director" HeaderButtonType="TextButton"
                        DataField="Director2">
                    </telerik:GridBoundColumn>
                </Columns>
            </telerik:GridTableView>
        </DetailTables>
    </MasterTableView>
    <ClientSettings AllowDragToGroup="true">
        <Selecting AllowRowSelect="true" />
        <ClientEvents OnRowSelected="GrdSysApps_RowSelected" OnRowDeselected="GrdSysApps_RowDeselected"
            OnRowCreated="GrdSysApps_RowCreated" OnCommand="RaiseCommand" />
    </ClientSettings>
    <FilterMenu EnableTheming="True">
        <CollapseAnimation Type="OutQuint" Duration="200"></CollapseAnimation>
    </FilterMenu>
</telerik:RadGrid>

[Shinu]

Hi Marty,

Normally you can access the controls in the FilterTemplate of a column using the column's UniqueName property.I was also not able to access the control in the case of a GridClientSelectColumn. But from what I know filtering is not possisble with GridClientSelectColumn and hence I don't think FilterTemplateis required for a GridClientSelectColumn. May be Telerik can suggest a solution for this.

Thanks
Shinu

[Marty]

The following code got the job done, as suggested, Thank you.

 foreach (GridFilteringItem filterItem in grdSysAppsRef.MasterTableView.GetItems(GridItemType.FilteringItem))
        {
            DropDownList combo = (DropDownList)filterItem.FindControl("cboGrdSysAppsFilter");
         }

Marty

[Marty]

OK, the plans changed a bit.  Is there a way to do the same thing with client-side code?  I'm looking at the API reference and do not see a way to get the filterItems...

Anybody?

Thanks.

[Princy]

Hello Marty,

You can place a script block with the dropdownlist in the filter template which should register the client ID of the dropdown. Then retrieve the clientId for each dropdownlist and thereby access the dropdownlist on the client event(for instance on button click). To understand better refer to the code library submission link given below:
Accessing server controls in a grid template on the client

Thanks
Princy.

[Marty]

Thank you for the response.

I just wanted to note that I was able to find another way of doing this that was a bit easier:

I replaced my DropDownList with a RadComboBox, then wired the OnClientLoadEvent to a client-side handler to assign a reference to the combobox when it's created as seen in the help article Here.

Thanks again!

Marty