先上效果图！

实现代码！

1    protected void Page_Load(object sender, EventArgs e) 2     { 3 //... 4         GridView1.DataSource = dt; 5         GridView1.DataBind(); 6         GroupName(0); 7         GroupName(1); 8         GroupName(3); 9         GroupSex();10     }11     public void GroupName(int col)12     {13         TableCell oldName = GridView1.Rows[0].Cells[col];14         for (int i = 1; i < GridView1.Rows.Count; i++)15         {16             TableCell Name = GridView1.Rows[i].Cells[col];17             if (oldName.Text == Name.Text)18             {19                 Name.Visible = false;20                 if (oldName.RowSpan == 0)21                 {22                     oldName.RowSpan = 1;23                 }24                 oldName.RowSpan++;25                 oldName.VerticalAlign = VerticalAlign.Middle;26             }27             else28             {29                 oldName = Name;30             }31         }32     }