C# DataGridView中合並單元格

 

///   合並GridView列中相同的行   
    ///      
    ///   GridView對象   
    ///   需要合並的列   
    public static void GroupRows(GridView GridView1, int cellNum)
    {
        int i = 0, rowSpanNum = 1;
        while (i < GridView1.Rows.Count - 1)
        {
            GridViewRow gvr = GridView1.Rows[i];
            for (++i; i < GridView1.Rows.Count; i++)
            {
                GridViewRow gvrNext = GridView1.Rows[i];
                if (gvr.Cells[cellNum].Text == gvrNext.Cells[cellNum].Text)
                {
                    gvrNext.Cells[cellNum].Visible = false;
                    rowSpanNum++;
                }
                else
                {
                    gvr.Cells[cellNum].RowSpan = rowSpanNum;
                    rowSpanNum = 1;
                    break;
                } 
                if (i == GridView1.Rows.Count - 1)
                {
                    gvr.Cells[cellNum].RowSpan = rowSpanNum;
                }
            }
        }
    } 
    ///      
    ///   根據條件列合並GridView列中相同的行   
    ///      
    ///   GridView對象   
    ///   需要合並的列
    ///   ///   條件列(根據某條件列還合並)
    public static void GroupRows(GridView GridView1, int cellNum, int cellNum2)
    {
        int i = 0, rowSpanNum = 1;
        while (i < GridView1.Rows.Count - 1)
        {
            GridViewRow gvr = GridView1.Rows[i];
            for (++i; i < GridView1.Rows.Count; i++)
            {
                GridViewRow gvrNext = GridView1.Rows[i];
                if (gvr.Cells[cellNum].Text + gvr.Cells[cellNum2].Text == gvrNext.Cells[cellNum].Text + gvrNext.Cells[cellNum2].Text)
                {
                    gvrNext.Cells[cellNum].Visible = false;
                    rowSpanNum++;
                }
                else
                {
                    gvr.Cells[cellNum].RowSpan = rowSpanNum;
                    rowSpanNum = 1;
                    break;
                } 
                if (i == GridView1.Rows.Count - 1)
                {
                    gvr.Cells[cellNum].RowSpan = rowSpanNum;
                }
            }
        }
    } 
  
第二個方法只是在第一個方法的修改了一點點, 在判斷單元格的時候，加上了一個條件列：
if (gvr.Cells[cellNum].Text + gvr.Cells[cellNum2].Text == gvrNext.Cells[cellNum].Text + gvrNext.Cells[cellNum2].Text)。當然，第二個方法還可以擴展，根據多個列的條件來合並。