สอบถามปัญหา binding ข้อมูลมาลง combobox พอโชว์ มันแสดง "System.Data.DataRowView"

Private Sub Combotype_SelectedIndexChanged() Handles Combotype.SelectedIndexChanged
        Dim typeID As Integer = GetCategoryID(Combotype.SelectedItem)

        sql = "SELECT DISTINCT pro_price FROM Product WHERE pro_id_type =" & typeID
        command = New SqlCommand(sql, connection)
        adapter = New SqlDataAdapter(command)
        datast = New DataSet()
        adapter.Fill(datast, "Product")

        bindingsrc = New BindingSource()
        bindingsrc.DataSource = datast.Tables("Product")

        Comboprice.DataSource = datast.Tables("Product")
        Comboprice.DisplayMember = "pro_price"

        UpdateBinding()
        Comboprice.SelectedIndex = 0
    End Sub

    Private Sub Comboprice_SelectedIndexChanged() Handles Comboprice.SelectedIndexChanged
        MessageBox.Show(Comboprice.Text)
    End Sub