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Setting default value
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Vijaianand
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Vijaianand asked on 21 Sep 2011, 02:46 PM
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.

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Shinu
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answered on 22 Sep 2011, 05:01 AM
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.
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Vijaianand
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answered on 22 Sep 2011, 02:02 PM
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. 
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Ivana
Telerik team
answered on 23 Sep 2011, 03:54 PM
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
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Vijaianand
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answered on 23 Sep 2011, 04:34 PM
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.?

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Ivana
Telerik team
answered on 27 Sep 2011, 03:05 PM
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
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Vijaianand
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answered on 16 Oct 2012, 06:55 PM
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
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Vijaianand
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Shinu
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Vijaianand
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Ivana
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