protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e)
{
//采用双缓冲技术的控件必需的设置
this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.SetStyle(ControlStyles.UserPaint, true);
try
{
if (e.RowIndex > -1 && e.ColumnIndex > -1)
{
DrawCell(e);
if (e.ColumnIndex == 0)
{
e.CellStyle.BackColor = gridColumnBackColor;
}
}
else
{
//二维表头
// 绘制表头（标题样式）
if (e.RowIndex == -1)
{
// 字体
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
// 画表头边框
Graphics g = e.Graphics;
e.Paint(e.CellBounds, DataGridViewPaintParts.Background | DataGridViewPaintParts.Border);
int left = e.CellBounds.Left, top = e.CellBounds.Top,
right = e.CellBounds.Right, bottom = e.CellBounds.Bottom;
// 两个标题背景色
g.FillRectangle(new SolidBrush(gridHeadBackColor /*this._mergecolumnheaderbackcolor*/), left, top,
right - left, bottom - top);
if (e.ColumnIndex == 0)
{
g.DrawString(e.Value.ToString() /*工艺号*/, bigFont, Brushes.White,
new Rectangle(left, top, right - left, bottom - top), sf);
}
// 绘制上下两层标题
if (SpanRows.ContainsKey(e.ColumnIndex)) //被合并的列
{
/*
* switch (SpanRows[e.ColumnIndex].Position)
* {
* case 1:
* left += 1;
* break;
*
* case 2:
* break;
*
* case 3:
* right -= 1;
* break;
* } */
// 画中线(横线）
g.DrawLine(new Pen(this.GridColor), left, (top + bottom) / 2,
right, (top + bottom) / 2);
// 画竖线
if (e.ColumnIndex % 2 == 1)
{
g.DrawLine(new Pen(this.GridColor), left - 1, top, left - 1, bottom);
}
else
{
g.DrawLine(new Pen(this.GridColor), left - 1, (bottom - top) / 2 + 3, left - 1, bottom);
}
// 小标题
string eValue = "时间";
if (e.ColumnIndex % 2 != 0)
{
eValue = "温度";
}
g.DrawString(eValue /*e.Value*/, e.CellStyle.Font, Brushes.White, new Rectangle(left, (top + bottom) / 2, right - left, (bottom - top) / 2), sf);
left = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Left, true).Left - 2;
if (left < 0)
{
left = this.GetCellDisplayRectangle(-1, -1, true).Width;
}
right = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Right, true).Right - 2;
if (right < 0)
{
right = this.Width;
}
// 大标题
g.DrawString(SpanRows[e.ColumnIndex].Text, bigFont, Brushes.White,
new Rectangle(left, top, right - left, (bottom - top) / 2), sf);
}
e.Handled = true;// 通知系统，我已经自定义处理。
}
}
// 打开了文字抗锯齿
e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
base.OnCellPainting(e);
}
catch
{ }
}
protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e)
{
//added by stone
e.Handled = true;
e.PaintBackground(e.CellBounds, true);
e.PaintContent(e.CellBounds);
try
{
if (e.RowIndex > -1 && e.ColumnIndex > -1)
{
DrawCell(e);
}
else
{
//二维表头
if (e.RowIndex == -1)
{
if (SpanRows.ContainsKey(e.ColumnIndex)) //被合并的列
{
//画边框
Graphics g = e.Graphics;
e.Paint(e.CellBounds, DataGridViewPaintParts.Background | DataGridViewPaintParts.Border);
int left = e.CellBounds.Left, top = e.CellBounds.Top + 2,
right = e.CellBounds.Right, bottom = e.CellBounds.Bottom;
switch (SpanRows[e.ColumnIndex].Position)
{
case 1:
left += 2;
break;
case 2:
break;
case 3:
right -= 2;
break;
}
//画上半部分底色
g.FillRectangle(new SolidBrush(this._mergecolumnheaderbackcolor), left, top,
right - left, (bottom - top) / 2);
//画中线
g.DrawLine(new Pen(this.GridColor), left, (top + bottom) / 2,
right, (top + bottom) / 2);
//写小标题
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
g.DrawString(e.Value + "", e.CellStyle.Font, Brushes.Black,
new Rectangle(left, (top + bottom) / 2, right - left, (bottom - top) / 2), sf);
left = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Left, true).Left - 2;
if (left < 0)
{
left = this.GetCellDisplayRectangle(-1, -1, true).Width;
}
right = this.GetColumnDisplayRectangle(SpanRows[e.ColumnIndex].Right, true).Right - 2;
if (right < 0)
{
right = this.Width;
}
g.DrawString(SpanRows[e.ColumnIndex].Text, e.CellStyle.Font, Brushes.Black,
new Rectangle(left, top, right - left, (bottom - top) / 2), sf);
e.Handled = true;
}
}
}
base.OnCellPainting(e);
}
catch
{ }
}
/// <summary>
/// 清除合并的列
/// </summary>
public void ClearSpanInfo()
{
SpanRows.Clear();
//ReDrawHead();
}