Hello Sunil,

In order to assign the selected item for your WebDropDown from the code behind file, you must set the SelectedItemIndex property of your WebDropDown. One way to do this is to find the item from the item list using FindItemsByValue.

For example:

//For this example, I am using a simple object for demonstration. Obviously your Model would be used instead.

Public Class item

	Public Property value() As Integer
		Get
			Return m_value
		End Get
		Set
			m_value = Value
		End Set
	End Property
	Private m_value As Integer
	Public Property text() As String
		Get
			Return m_text
		End Get
		Set
			m_text = Value
		End Set
	End Property
	Private m_text As String

	Public Sub New(val As Integer, txt As String)
		value = val
		text = txt
	End Sub
End Class

//Here we bind the sample items to the list

ItemDropDown.DataSource = New BindingList(Of item)() From { _
	New item(1, "item1"), _
	New item(2, "item2"), _
	New item(1, "item3") _
}
ItemDropDown.ValueField = "value"
ItemDropDown.TextField = "text"
ItemDropDown.DataBind()

//Lastly we find the item and then select it by index.

Dim index = ItemDropDown.Items.FindItemByValue("2").Index

ItemDropDown.SelectedItemIndex = index

Alternatively, you can also loop through the items list in order to compare against the item text or the item text and value simultaneously.

Sincerely,
Jon
Infragistics, Inc.
<http://es.infragistics.com/support/get-help.aspx>