如何设置DataGird合并行或列？

其实很简单，就是在绑定数据后对Cells属性进行操作。
设置Cells.Visible,RowSpan,ColSpan 属性等。

private void SetTableStyle()
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("id",typeof(string));
            dt.Columns.Add("name",typeof(string));
            dt.Columns.Add("title",typeof(string));
            for(int i = 0; i< 10; i++)
            {
                DataRow dr = dt.NewRow();
                dr[0] = 1;
                dr[1] = "name " + i.ToString();
                dr[2] = "title " + i.ToString();
                dt.Rows.Add(dr);
            }
            this.DataGrid1.DataSource = dt;
            this.DataGrid1.DataBind();
            int rowspan = 3;
            if ( this.DataGrid1.Items.Count > 0 )
            {
                for( int i = 0 ; i < this.DataGrid1.Items.Count; i ++ )
                {
                    if ( i < 3 )
                    {
                        if ( i == 0  )
                            this.DataGrid1.Items[i].Cells[0].RowSpan = rowspan;
                        else
                        {
                            this.DataGrid1.Items[i].Cells[0].Visible = false;
                        }
                    }
                    else
                    {
                        this.DataGrid1.Items[i].Cells[0].Visible = false;
                        this.DataGrid1.Items[i].Cells[2].ColumnSpan = 2;
                    }
                }
            }