如何在vb.net中向gridview添加组合框？

Question

我尝试在gridview中添加组合框但是我收到此错误：

  

异常：类型的值   'System.Windows.Forms.DataGridViewComboBoxColumn'无法转换   到'System.Web.UI.WebControls.DataControlField'。

这是我的代码：

Dim bsCountry As BindingSource

            Dim col As New DataGridViewComboBoxColumn
            col.DataPropertyName = "countryName"
            col.HeaderText = "Country"
            col.Name = "cName"

            col.DataSource = bsCountry
            col.DisplayMember = "countryName"
            col.ValueMember = "countryId"

            GridView2.Columns.Add(col)
            GridView2.DataBind()