i am able to populate the Combobox , but i am having problem populating the GridView, once i select a value from the ComboBox.

i put this piece of code on the Load event of the form which populate the ComboBox.

Private Sub Receive_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim con As New SqlConnection(" Data Source=GX520B;Initial Catalog=ReturnEquipment;Integrated Security=True")
Dim cmd As New SqlCommand("Select ItemSerialNumber FROM dbo.RmaDetails")
cmd.Connection = con
Dim da As New SqlDataAdapter
Dim ds As New DataSet
da.SelectCommand = cmd
ds.Clear()
da.Fill(ds, "dbo.RmaDetails")
If ds.Tables("dbo.RmaDetails").Rows.Count = 0 Then
MessageBox.Show("There are currently no registries in the database.")
Else
ComboBox1.DataSource = ds.Tables("dbo.RmaDetails")
 
ComboBox1.DisplayMember = "ItemSerialNumber"
End If
End Sub

If someone out there can help me with the grid view would be apreciated