在网上找到这方面的源代码。
http://www.codeproject.com/Questions/152113/How-can-i-merge-DataGridView-Rows-Cells-with-Equal
http://forums.codeguru.com/showthread.php?415930-DataGridView-Merging-Cells
namespace Sample5
{
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");
this.dataGridView1.Columns.Add("AprWin", "Win");
this.dataGridView1.Columns.Add("AprLoss", "Loss");
this.dataGridView1.Columns.Add("MayWin", "Win");
this.dataGridView1.Columns.Add("MayLoss", "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);
this.dataGridView1.Scroll += new ScrollEventHandler(dataGridView1_Scroll);
this.dataGridView1.ColumnWidthChanged += new DataGridViewColumnEventHandler(dataGridView1_ColumnWidthChanged);
}
void dataGridView1_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
{
Rectangle rtHeader = this.dataGridView1.DisplayRectangle;
rtHeader.Height = this.dataGridView1.ColumnHeadersHeight / 2;
this.dataGridView1.Invalidate(rtHeader);
}
void dataGridView1_Scroll(object sender, ScrollEventArgs e)
{
Rectangle rtHeader = this.dataGridView1.DisplayRectangle;
rtHeader.Height = this.dataGridView1.ColumnHeadersHeight / 2;
this.dataGridView1.Invalidate(rtHeader);
}
void dataGridView1_Paint(object sender, PaintEventArgs e)
{
string[] monthes = { "January", "February", "March","April" ,"May"};
for (int j = 0; j < 10;)
{
Rectangle r1 = this.dataGridView1.GetCellDisplayRectangle(j, -1,true);
int w2 = this.dataGridView1.GetCellDisplayRectangle(j + 1, -1, true).Width;
r1.X += 1;
r1.Y += 1;
r1.Width = r1.Width + w2 - 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)
{
Rectangle r2 = e.CellBounds;
r2.Y += e.CellBounds.Height / 2;
r2.Height = e.CellBounds.Height / 2;
e.PaintBackground(r2, true);
e.PaintContent(r2);
e.Handled = true;
}
}
}
}