如何插入一个空行中DOTNET到网格视图

protected void FillBlankRowToGrid()

{  

    //here your code to fill your data table with data base records.....

    //if it will return 15 records then this loop will fill 5 black row to your grid

    DataRow dr;

    for (int i = dt.Rows.Count; i < 20; i++)

    {

        dr = dt.NewRow();

        dr[0] = dr[1] = dr[2] = dr[3] = dr[4] = "";

        dt.Rows.Add(dr);

    }

    dt.AcceptChanges();

    grdView.DataSource = dt;

    grdView.DataBind();

}