Set selected value in RadComboBox after selecting with Google-like filtering

[john81]

I've implemented Google-like filtering in my RadGrid FilterTemplate column similar to how its described here.  It works great except when you make a selection the value doesn't stay present in the RadComboBox.  Is there a way to accomplish this?  I tried using sender.set_text() but it doesn't seem to work.

<telerik:GridBoundColumn DataField="last_name" DataType="System.String" HeaderText="Last Name" SortExpression="last_name"
    UniqueName="last_name" ShowFilterIcon="True" AutoPostBackOnFilter="true" CurrentFilterFunction="Contains">
    <FilterTemplate>
        <telerik:RadComboBox runat="server" ID="rcblast" DataTextField="last_name" DataValueField="last_name" EnableEmbeddedSkins="False" Skin="2015"
            Width="100px" EnableLoadOnDemand="True" MarkFirstMatch="True" ShowToggleImage="False" OnClientDropDownOpening="lastName_ClientDropDownOpening"
            OnClientSelectedIndexChanged="lastName_ClientSelectedIndexChanged" OnClientItemsRequesting="lastName_ItemsRequested"
            OnItemsRequested="rcblast_ItemsRequested">
        </telerik:RadComboBox>
        <telerik:RadScriptBlock ID="RadScriptBlock2" runat="server">
            <script type="text/javascript">
                function lastName_ClientSelectedIndexChanged(sender, args) {
                    $find("<%= rgTraining.ClientID %>").get_masterTableView().filter("last_name", args.get_item().get_text(), "StartsWith");

                    // doesn't seem to work
                    sender.set_text(args.get_item().get_text());
                }
                function lastName_ItemsRequested(sender, args) {
                    if (args.get_text().length < 3)
                        args.set_cancel(true);
                    else
                        args.set_cancel(false);
                }
                function lastName_ClientDropDownOpening(sender, args) {
                    var comboText = sender.get_text();
                    if (comboText.length < 3) {
                        args.set_cancel(true);
                    }
                }
            </script>
        </telerik:RadScriptBlock>
    </FilterTemplate>

    <ItemStyle VerticalAlign="Top" />
    <HeaderStyle HorizontalAlign="Left" VerticalAlign="Bottom" Font-Bold="True" Font-Underline="True" />
</telerik:GridBoundColumn>

[Princy]

Hi,

Please add the following code to your RadComboBox to set the selected value on filter.

ASPX:

<telerik:RadComboBox runat="server" ID="rcblast"
SelectedValue='<%# ((GridItem)Container).OwnerTableView.GetColumn("last_name").CurrentFilterValue %>' . .  >

Thanks,
Princy

[john81]

I would think that would work but it ends up causing an exception.

Selection out of range
Parameter name: value
  Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

 Exception Details: System.ArgumentOutOfRangeException: Selection out of range
Parameter name: value

I'm going to guess that is because the RadComboBox has no items at that point.  I was able to come up with a different approach by checking for GridFilteringItem in the ItemDataBound of the RadGrid.

if (e.Item is GridFilteringItem)
{
    var filterItem = (GridFilteringItem)e.Item;
    if (rgTraining.MasterTableView.GetColumn("last_name").CurrentFilterValue != "")
        filterItem["last_name"].Text = rgTraining.MasterTableView.GetColumn("last_name").CurrentFilterValue;
}

The weird thing about this approach is it turns the filter textbox into a label.  I'd like to to remain a textbox though.

[Princy]

Hi,

Please try the following code snippet to set the selected text in RadComboBox:

C#:

if (e.Item is GridFilteringItem)
{
  var filterItem = (GridFilteringItem)e.Item;
  if (RadGrid1.MasterTableView.GetColumn("last_name").CurrentFilterValue != "")
  {
    RadComboBox last_name = (RadComboBox)filterItem.FindControl("rcblast");
    last_name.Text = RadGrid1.MasterTableView.GetColumn("last_name").CurrentFilterValue;
  }
}

Thanks,
Princy