C# Winform DataGridView中实现二维表头

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 = 24，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。

你应该现自定义你的datagridview列的名称（点击datagridview右上方的三角，选择编辑列，进入编辑列的界面，如果还不懂就慢慢摸索一下吧。），然后你再将你定义的列跟你的ds.Table[0]的列绑定。当然还有一个不使用自定义列的方式就是在产生ds.Table[0]这个表时，将Table[0]的各个字段都转换成你要显示的中文的列的名称。

另外你不应该使用语句：

datagridview1.datasource=ds.Table[0].toString()

而应该使用：

datagridview1.datasource=ds.Table[0]

实现思路：把每一列的【SortMode】属性设置为【NotSortTable】

代码实现：

for(int i=0i <this.dataGridView1.Columns.Counti++)

{

this.dataGridView1.Columns[i].SortMode = DataGridViewColumnSortMode.Programmatic

}

添加dataGridView1的ColumnHeaderMouseClick事件：

private int sortOrder = 0

private void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)

{

if (sortOrder == 0)

{

this.dataGridView1.Sort(this.dataGridView1.Columns[e.ColumnIndex], ListSortDirection.Descending)

sortOrder++

}

else

{

this.dataGridView1.Sort(this.dataGridView1.Columns[e.ColumnIndex], ListSortDirection.Ascending)

sortOrder--

}

this.dataGridView1.Columns[0].HeaderCell.SortGlyphDirection = System.Windows.Forms.SortOrder.None

}

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