DataGrid(WinForm)显示行号最简单的方法

同样是重载OnPaint 方法,但是方法应该是比较巧妙的!而且不用担心标题是不是有显示,也不用去计算坐标,很方便的说!

protected override void OnPaint(PaintEventArgs e)
   { 
 
    base.OnPaint(e);   if(this.DataSource!=null)
    {   
     if( this.VisibleRowCount == 0 )return;    Rectangle currRct;
    int iRowCount = this.VisibleRowCount;
    string sText = "";
    int nowY = 0;
    for( int i = 0 ; i < iRowCount ; i++ )
     { 
      currRct = (Rectangle)this.GetCellBounds( i, 0 );
      nowY = currRct.Y + 2;
      sText = string.Format( " {0}", i+1 );   
      e.Graphics.DrawString( sText, this.Font, new SolidBrush(Color.Black), 10, nowY ); 
     }   }
    }