C# Winform DataGridView中实现二维表头

2025-01-07 16:24:02
推荐回答(4个)
回答1:

1,继承DataGridView,添加表头信息类。
2,添加CellPainting,代码如下:
private void DataGridViewEx_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
{
if (e.RowIndex == -1)
{
// int w = dataGridView1.HorizontalScrollingOffset + dataGridView1.TopLeftHeaderCell.Size.Width + dataGridView1.Columns[0].Width + 10;

Rectangle newRect = new Rectangle(e.CellBounds.X + 1,
e.CellBounds.Y + 1, e.CellBounds.Width - 4,
e.CellBounds.Height - 4);

using (
Brush gridBrush = new SolidBrush(this.GridColor),
backColorBrush = new SolidBrush(e.CellStyle.BackColor))
{
using (Pen gridLinePen = new Pen(gridBrush))
{
// Erase the cell.
e.Graphics.FillRectangle(backColorBrush, e.CellBounds);

// Draw the grid lines (only the right and bottom lines;
// DataGridView takes care of the others).
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left,
e.CellBounds.Bottom - 1, e.CellBounds.Right - 1,
e.CellBounds.Bottom - 1);
if (e.ColumnIndex > -1 && topRow!=null&&topRow.Cells[e.ColumnIndex].ColSpan>1)
{
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,
e.CellBounds.Top + e.ClipBounds.Height / 2, e.CellBounds.Right - 1,
e.CellBounds.Bottom);
}
else
{
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1,
e.CellBounds.Top, e.CellBounds.Right - 1,
e.CellBounds.Bottom);
}

// Draw the inset highlight box.
// e.Graphics.DrawRectangle(Pens.Blue, newRect);

int scale = e.CellBounds.Height/3;
if (e.ColumnIndex > -1 && topRow.Cells[e.ColumnIndex].Text != null)
{
scale= e.CellBounds.Height / 2;
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - e.CellBounds.Height / 2, e.CellBounds.Right, e.CellBounds.Bottom - e.CellBounds.Height / 2);
}
// Draw the text content of the cell, ignoring alignment.

if (e.Value != null)
{
e.Graphics.DrawString(e.Value.ToString(), e.CellStyle.Font,
Brushes.Crimson, e.CellBounds.X + 2,
e.CellBounds.Y + scale+ 2, StringFormat.GenericDefault);

}

if (e.ColumnIndex > -1 && topRow.Cells[e.ColumnIndex].RelateIndex > -1 && topRow.Cells[e.ColumnIndex].Text!=null)

{
Rectangle recCell = new Rectangle(e.CellBounds.X - 1 - topRow.Cells[e.ColumnIndex].SpanRowWith,
e.CellBounds.Y + 1, topRow.Cells[e.ColumnIndex].SpanRowWith,
e.CellBounds.Height / 2);

StringFormat sf = new StringFormat();

sf.Alignment = StringAlignment.Center;

e.Graphics.DrawString(topRow.Cells[e.ColumnIndex].Text, e.CellStyle.Font, Brushes.Crimson, recCell, sf);

}

e.Handled = true;
}
}
}

}
3,调用方法
dataGridViewEx1.TopRow.Cells[2].Text = "入库";
dataGridViewEx1.TopRow.Cells[2].ColSpan = 2;

dataGridViewEx1.TopRow.Cells[4].Text = "出库";
dataGridViewEx1.TopRow.Cells[4].ColSpan = 2;4,效果图

至于表尾合计,也做出了原型。二维表头+表尾合计,基本上满足需求了。

回答2:

那就出钱买第三方控件吧!别只想伸手拿来!!自己画,滚动条一拉,列头就花了,那只能说明水平太烂,没控制好

回答3:

sourcegrid
试下这个~

回答4:

自定义表头不行吗?在 creat的时候 忘记是个什么方法了。