.NET Winform Datagridview 实现多行表头

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最近把我们的b/s系统,增加智能客户端的功能。确实智能客户端是非常好用的东西。可惜winform的控件功能不怎么强大,相比vb差很多啊。比如DataGridView不支持二维表头,不支持表尾合计,相比之下 web的好办多了(还是喜欢Web的排版、导航,但喜欢Win的操作性,希望WPF早日流行)。

但是 MIS系统没有二维表头确实是客户不能接受的,尝试了com控件flexgrid或者开源的SourceGrid3,但都不怎么好用,于是想改造一下DataGridView。我的做法是在CellPainting做手脚。花了一天时间尝试,只是做出原型,还没有完善,希望有需要的朋友少走弯路。

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,DataGridViewCellPaintingEventArgse)
{
if(e.RowIndex==-1)
{
//intw=dataGridView1.HorizontalScrollingOffset+dataGridView1.TopLeftHeaderCell.Size.Width+dataGridView1.Columns[0].Width+10;


RectanglenewRect
=newRectangle(e.CellBounds.X+1,
e.CellBounds.Y
+1,e.CellBounds.Width-4,
e.CellBounds.Height
-4);

using(
BrushgridBrush
=newSolidBrush(this.GridColor),
backColorBrush
=newSolidBrush(e.CellStyle.BackColor))
{
using(PengridLinePen=newPen(gridBrush))
{
//Erasethecell.
e.Graphics.FillRectangle(backColorBrush,e.CellBounds);

//Drawthegridlines(onlytherightandbottomlines;
//DataGridViewtakescareoftheothers).
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.Top
+e.ClipBounds.Height/2,
e.CellBounds.Bottom);
}

else
{
e.Graphics.DrawLine(gridLinePen,
e.CellBounds.Top,
e.CellBounds.Bottom);
}


//DrawtheinsethighlightBox.
//e.Graphics.DrawRectangle(Pens.Blue,newRect);

intscale=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.Bottom
-e.CellBounds.Height/2,e.CellBounds.Right,e.CellBounds.Bottom-e.CellBounds.Height/2);
}

//Drawthetextcontentofthecell,ignoringalignment.



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)

{
RectanglerecCell
=newRectangle(e.CellBounds.X-1-topRow.Cells[e.ColumnIndex].SpanRowWith,topRow.Cells[e.ColumnIndex].SpanRowWith,
e.CellBounds.Height
/2);


StringFormatsf
=newStringFormat();

sf.Alignment
=StringAlignment.Center;


e.Graphics.DrawString(topRow.Cells[e.ColumnIndex].Text,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
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。 原文链接:https://www.f2er.com/vb/260678.html

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