Setting default value

[Vijaianand]

I am using the RadCombobox with design time datasource setting because I need to use the Itemperrequest property. I know itemperrequest and showmoreresult property don't work if you have dynamic datasource setting. Because of designtime datasource setup, I don't know how to set the default value to the combo using valuefield. 

Help me here.

[Shinu]

Hello VijayAnand,

You can try the following code library approach to achieve your scenario.
Setting an initial value in RadComboBox while using Load on Demand.

Thanks,
Shinu.

[Vijaianand]

It doesn't show how to set the default value. It only shows how to load the combobox with filtered data. I need to set the combo to a value checking the value field. 

[Ivana]

Hi Vijaianand,

You could subscribe to the OnClientItemsRequested client-side event and set a selected item from there.

Here is an example:

function OnClientItemsRequested(sender, eventArgs) {
    var items = sender.get_items();
    var firstItem = items.getItem(0);
    firstItem.select();
}

Hope this helps.

Greetings,
Ivana
the Telerik team

[Vijaianand]

I guess I wasn't clear about my requirement. I have the combobox. If I load runtime, I cannot use Itemperrequest and Showmoreresult stuff since its a restriction. If I loaded using design time sqldatasource, I don't have access to the data in codebehind and I am not able to set the initial value from it. So what is the solution to set initial value for the combobox not select item.?

[Ivana]

Hello Vijaianand,

You could use the EmptyMessage property of the RadComboBox to set an initial value.

You could refer to the following help article, to see how to insert a default item when databinding the RadComboBox: Insert a default item when databinding RadComboBox.

Also, you could take a look at the automatic load on demand example on our website:
RadComboBox: Automatic Load on Demand.

Hope this helps.

Best wishes,
Ivana
the Telerik team

[Vijaianand]

I was able to figure out the right answer from some help.

If Not TypeOf DataItem Is Telerik.Web.UI.GridInsertionObject Then
            Dim dv As System.Data.DataRowView = CType(_dtItem, System.Data.DataRowView)
            If dv IsNot Nothing Then
Dim selectedItem As New RadComboBoxItem()
                selectedItem.Value = dv.Row.Item("NetworkManagerId").ToString
                NetworkManagerId.Items.Add(selectedItem)
                selectedItem.Selected = True
                selectedItem.DataBind()
End If
End If