GridView1_RowDataBound如何改变当前行某单元格值？

C# code

 protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)        {            if (e.Row.RowType == DataControlRowType.DataRow)            {               //。。。。。                GridViewRow row = e.Row;    Users users_child = row.DataItem as Users;                users_child.daysCount = count;//重新某单元格值              }}

C# code

(e.Row. DataItem as Users). daysCount=count;