DataGridView合併列標題

下面的示例實現如下形式的列標題合併。

-----------------------------------------------------------------

               |   January     |   February   |     March       |
               |  Win | Loss |  Win | Loss |  Win | Loss |
-----------------------------------------------------------------
Team1  |          |           |          |            |          |           |
Team2  |          |           |          |            |          |           |
Team3  |          |           |          |            |          |           |
-----------------------------------------------------------------

 

部分代碼：

public partial class DgvColumnHeaderMerge : Form
    {
        public DgvColumnHeaderMerge()
        {
            InitializeComponent();
        }

        private void DgvColumnHeaderMerge_Load(object sender, EventArgs e)
        {
            this.dataGridView1.Columns.Add("JanWin", "Win");
            this.dataGridView1.Columns.Add("JanLoss", "Loss");
            this.dataGridView1.Columns.Add("FebWin", "Win");
            this.dataGridView1.Columns.Add("FebLoss", "Loss");
            this.dataGridView1.Columns.Add("MarWin", "Win");
            this.dataGridView1.Columns.Add("MarLoss", "Loss");

            for (int j = 0; j < this.dataGridView1.ColumnCount; j++)
            {
                this.dataGridView1.Columns[j].Width = 45;
            }
            this.dataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.EnableResizing;
            this.dataGridView1.ColumnHeadersHeight = this.dataGridView1.ColumnHeadersHeight * 2;
            this.dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.BottomCenter;
            this.dataGridView1.CellPainting += new DataGridViewCellPaintingEventHandler(dataGridView1_CellPainting);
            this.dataGridView1.Paint += new PaintEventHandler(dataGridView1_Paint);
        }

        void dataGridView1_Paint(object sender, PaintEventArgs e)
        {
            string[] monthes = { "January", "February", "March" };
            for (int j = 0; j < 6;)
            {
                Rectangle r1 = this.dataGridView1.GetCellDisplayRectangle(j, -1, true); //get the column header cell
                r1.X += 1;
                r1.Y += 1;
                r1.Width = r1.Width * 2 - 2;
                r1.Height = r1.Height / 2 - 2;
                e.Graphics.FillRectangle(new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.BackColor), r1);
                StringFormat format = new StringFormat();
                format.Alignment = StringAlignment.Center;
                format.LineAlignment = StringAlignment.Center;
                e.Graphics.DrawString(monthes[j/2],
                    this.dataGridView1.ColumnHeadersDefaultCellStyle.Font,
                    new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
                    r1,
                    format);
                j += 2;
            }
        }

        void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
        {
            if (e.RowIndex == -1 && e.ColumnIndex > -1)
            {
                e.PaintBackground(e.CellBounds, false);            
                Rectangle r2 = e.CellBounds;
                r2.Y += e.CellBounds.Height / 2;
                r2.Height = e.CellBounds.Height / 2;
                e.PaintContent(r2);
                e.Handled = true;
            }
        }
    }

 

 

 

轉載請註明出處！！！

http://blog.csdn.net/stuqbx