[Solved] Setting an initial value in RadComboBox while using Load on Demand

[Andrea]

My combo is empty until I click the dropdown (items request event is fire): so what is the best strategy to set an initial item (value and text) in RadComboBox while using Loading on Demand?

Thx

[Princy]

Hi,

One suggestion is that you can add an initial RadComboBoxItem as follows.

ASPX:

<telerik:RadComboBox ID="RadComboBox1" runat="server" EnableLoadOnDemand="True" MarkFirstMatch="True" OnItemsRequested="RadComboBox1_ItemsRequested">
</telerik:RadComboBox>

C#:

protected void Page_Load(object sender, EventArgs e)
{
   //adding initial RadComboBoxItem
    if (!Page.IsPostBack)
    {
        RadComboBoxItem item = new RadComboBoxItem();
        item.Text = "initial item";
        item.Value = "0";
        RadComboBox1.Items.Add(item);
    }
}
protected void RadComboBox1_ItemsRequested(object o, Telerik.Web.UI.RadComboBoxItemsRequestedEventArgs e)
{
    //Your code
}

Please take a look into this for more information.

Hope this helps.

Regards,
Princy.

[Rahul]

Hi Princy,
              How can do it client side on page load.
Thanks,
Rahul

[Princy]

Hi Rahul,

Please have a look into the following code snippet to add a new item to the RadComboBox from the client side.

JavaScript:

<script type="text/javascript">
    function pageLoad() {
        var combo = $find("<%= RadComboBox1.ClientID %>");
        var comboItem = new Telerik.Web.UI.RadComboBoxItem();
        comboItem.set_text("New Item");
        combo.trackChanges();
        combo.get_items().add(comboItem);
        combo.commitChanges();
    }
</script>

Thanks,
Princy.