GridTemplateColumn with FilterTemplate when AllowFiltering=true causes an error.

[Greg S]

After a few hours of searching the internet on the error "Specified argument was out of the range of valid values", I discovered that the cause was the GridTemplateColumn behaving differently that a GridBoundColumn with regards to filtering. In the code snippet below, you can use the one filter just fine. If you change the telerik:GridTemplateColumn (column 2) to AllowFiltering='true' while having a <FilterTemplate> element, using the filter on column 3 will throw an error. AllowFiltering='true' doesn't cause a problem if there's no <FilterTemplate> element. Note that changing the GridBoundColumn ( column 1) between AllowFiltering= true/false doesn't cause an issue. It's only the GridTemplateColumn type.

The different behavior between the GridBoundColumn and GridTemplateColumn types seems like a bug.

 

      <telerik:RadGrid runat="server" DataSourceID="sql_tables" AllowFilteringByColumn="true" AutoGenerateColumns="false">
            <MasterTableView>
                <Columns>
                    <telerik:GridBoundColumn DataField="name" HeaderText="name" AllowFiltering="true" UniqueName="name1">
                        <FilterTemplate>
                            custom filter template on GridBoundColumn is OK
                        </FilterTemplate>
                    </telerik:GridBoundColumn>

                    <telerik:GridTemplateColumn DataField="name" HeaderText="name-template" AllowFiltering="false" UniqueName="name2">
                        <ItemTemplate>
                            <%#Eval("name") %>
                        </ItemTemplate>
                        <FilterTemplate>custom filter on GridTemplateColumn breaks filtering.</FilterTemplate>
                        <HeaderStyle BackColor="Pink" />
                    </telerik:GridTemplateColumn>

<telerik:GridBoundColumn DataField="type" HeaderText="type" AllowFiltering="true" UniqueName="type"/>
                </Columns>
            </MasterTableView>
        </telerik:RadGrid>

        <asp:SqlDataSource runat="server" ID="sql_tables" ConnectionString="<%$ ConnectionStrings:MyDB%>" SelectCommand="select top 4 name, object_id, schema_id, type, type_desc from sys.tables" />

[Maria Ilieva]

Hi Greg,

The same scenario is presented in the online demo below and works properly without an error:
http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/filtering/filter-templates/defaultcs.aspx

Test it on your end and verify what the difrenace in your case is.

Regards,
Maria Ilieva
Telerik by Progress