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I have a scenario:I loaded my combox box with the datatable in my Form Load as below:

m_dtDelayedDeliveryDays = GetDelayedDeliveryDays()

       For Each dr As DataRow In m_dtDelayedDeliveryDays.Rows

       cmbDelayedDeliveryDays.DataSource = m_dtDelayedDeliveryDays
       cmbDelayedDeliveryDays.DisplayMember = "DeliveryDelayDays"
       cmbDelayedDeliveryDays.ValueMember = "DeliveryDelayDaysID"

In also i am able to pick the Id based on the user selection as below:
Private Sub cmbDelayedDeliveryDays_SelectedIndexChanged(sender As System.Object, e As System.EventArgs) Handles cmbDelayedDeliveryDays.SelectedIndexChanged

        Dim selectedDataRow As DataRow = DirectCast(cmbDelayedDeliveryDays.SelectedItem, DataRowView).Row
        Dim delayId As Integer = Convert.ToInt32(selectedDataRow("DeliveryDelayDaysID"))

    End Sub

My combo box is loaded with values like 0,3,7,15,20,30..
With the above code my combo box is with default value 0. I want me combo box to be empty by default.

Please help.

Posted 19-Feb-13 6:18am

1 solution

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Solution 1

cmbDelayedDeliveryDays.ValueMember = "DeliveryDelayDaysID"
put the following
cmbDelayedDeliveryDays..SelectedIndex = -1

In Sub cmbDelayedDeliveryDays_SelectedIndexChanged you need to wrap any code that refers to cmbDelayedDeliveryDays.SelectedItem with a check on
If cmbDelayedDeliveryDays.SelectedIndex > 0 Then
End If

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