合并 DataGrid 中相同数据的行。

效果如图：

把下面这段代码 COPY 在 DataGridItem_DataBind 事件处理程序 或 其他自己写的方法中都可以

            if(DataGrid1.Items.Count <= 1)
                return;
            TableCell oldTc = DataGrid1.Items[0].Cells[0];
            
            for(int i=1;i<DataGrid1.Items.Count;i++)
            {
                DataGridItem di = DataGrid1.Items[i];
                                TableCell tc = DataGrid1.Items[i].Cells[0];
                if(oldTc.Text == tc.Text)
                {
                    tc.Visible = false;
                
                    if(oldTc.RowSpan == 0)
                    {
                        oldTc.RowSpan = 1;
                    }
                    oldTc.RowSpan++;
                    oldTc.VerticalAlign = VerticalAlign.Middle;
                    
                }
                else
                {
                    oldTc = tc;

                }
            }

// from CSDN, 原贴： http://dev.csdn.net/article/41/41567.shtm