How to call event ItemsRequest from custom button on footer template

[Vaios Vaitsis]

Hi, 

I have a following scenario:
Generate page with dynamic controls. One of these controls is rad combo box with footer template and item template. 
In footer template was added button. I want this button to call the event ItemsRequest.
I will use this button to clean cache rad combo box.

[Ivana]

Hello Vaios,

Take a look at the following example:

function clientClicked(sender, args) {
    var combo = $find("RadComboBox1");
    combo.requestItems("", true);
}

<telerik:RadComboBox runat="server" ID="RadComboBox1" OnItemsRequested="RadComboBox1_ItemsRequested"
    EnableLoadOnDemand="true">
    <FooterTemplate>
        <telerik:RadButton runat="server" Text="More" ID="RadButton1" OnClientClicked="clientClicked"
            AutoPostBack="false" />
    </FooterTemplate>
</telerik:RadComboBox>

protected void RadComboBox1_ItemsRequested(object sender, Telerik.Web.UI.RadComboBoxItemsRequestedEventArgs e)
{
    RadComboBox1.Items.Add(new RadComboBoxItem("item1"));
}

I hope this will help.

Regards,
Ivana
the Telerik team

[Vaios Vaitsis]

Thanks Ivana,
your example helped me to fix it.

[Vaios Vaitsis]

Hi, 

I have the same scenario, but now I want to write in the box without opening combobox list. Is this possible?
At the moment I've set the following properties:

private void SetProperties(FieldData fieldInfo, RadComboBox control)
{
   control.EnableLoadOnDemand = true;
   control.ShowMoreResultsBox = true;
   control.AllowCustomText = true;
   control.ItemsPerRequest = 50;
   control.EnableTextSelection = true;
   control.HighlightTemplatedItems = true;
   control.LoadingMessage = "Loading...";
   control.ShowDropDownOnTextboxClick = false;
   control.Filter = RadComboBoxFilter.None;
   control.Height = Unit.Pixel(150);
   control.DropDownWidth = Unit.Pixel(420);

   control.Attributes.Add("relFile", fieldInfo.RelFile);

   control.HeaderTemplate = new HeaderTemplate();
   control.FooterTemplate = new FooterTemplate();
   control.ItemTemplate = new ItemTemplate();
}

[Ivana]

Hello Vaios,

The property ShowDropDownOnTextboxClick should do just that. If you, however, need to have some more control over the drop-down list, when it should be opened, you could subscribe to the OnClientDropDownOpening event and cancel its default action if your scenario does not satisfy certain criteria.

All the best,
Ivana
the Telerik team