『转载』C# winform 中dataGridView的重绘（进度条，虚线，单元格合并等）

原文转载自：http://hi.baidu.com/suming/item/81e45b1ab9b4585f2a3e2243

最近比较浅的研究了一下dataGridView的重绘，发现里面还是有很多东西可以学习的，摘录如下（其实就是在dataGridView1_CellPainting写一些代码）

主要代码：

    int top = ;
    int left = ;
    int height = ;
    int width1 = ;
    /// <summary>
    /// 窗体的重绘事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
        /** 表头处理*************************************/
        if (e.RowIndex == -)
        {
            if (e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex == )
            {
                top = e.CellBounds.Top;
                left = e.CellBounds.Left - ;
                height = e.CellBounds.Height;
                width1 = e.CellBounds.Width;
                Rectangle rect1 = new Rectangle(left, top, width1, e.CellBounds.Height);
                //表头第一列
                if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.Blue))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //表头第二列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.Orange))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //表头第三列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.Orange))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //表头第四列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.Orange))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //表头第五列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.Blue))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //表头第六列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.Blue))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                using (Pen gridLinePen = new Pen(Color.Green , ))
                {
                    //绘出上线
                    e.Graphics.DrawLine(gridLinePen, left, top, left + width1, top);
                    //绘出下线
                    e.Graphics.DrawLine(gridLinePen, left, top + height, left + width1, top + height);
                    //绘出左线
                    e.Graphics.DrawLine(gridLinePen, left, top, left, top + height);
                    string columnValue = "";
                    //计算绘制字符串的位置
                    if (e.ColumnIndex == )
                    {
                        columnValue = "零件号";
                    }
                    else if (e.ColumnIndex == )
                    {
                        columnValue = "8:00--11:59";
                    }
                    else if (e.ColumnIndex == )
                    {
                        columnValue = "12:00--16:59";
                    }
                    else if (e.ColumnIndex == )
                    {
                        columnValue = "18:00--30:59";
                    }
                    else if (e.ColumnIndex == )
                    {
                        columnValue = "进度";
                    }
                    else if (e.ColumnIndex == )
                    {
                        columnValue = "进度率";
                    }
                    SizeF sf = e.Graphics.MeasureString(columnValue, e.CellStyle.Font);
                    float lstr = (width1 - sf.Width) / ;
                    //float rstr = sf.Height/2;
                    float rstr = (height - sf.Height) / ;
                    //画出文本框

                    if (columnValue != "")
                    {
                        e.Graphics.DrawString(columnValue, e.CellStyle.Font,
                                                   new SolidBrush(Color.White),
                                                     left + lstr,
                                                     top + rstr,
                                                     StringFormat.GenericDefault);
                    }
                }
                e.Handled = true;
            }

        }
         /** 内容处理*************************************/
        else
        {
            if (e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex == )
            {
                top = e.CellBounds.Top;
                left = e.CellBounds.Left - ;
                height = e.CellBounds.Height;
                width1 = e.CellBounds.Width;
                Rectangle rect1 = new Rectangle(left, top, width1, e.CellBounds.Height);
                //内容第一列
                if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.LightGreen))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //内容第二列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.White))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //内容第三列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.White))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //内容第四列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.White))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //内容第五列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.LightGreen))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                //内容第六列
                else if (e.ColumnIndex == )
                {
                    using (Brush backColorBrush = new SolidBrush(Color.LightGreen))
                    {
                        //抹去原来的cell背景
                        e.Graphics.FillRectangle(backColorBrush, rect1);
                    }
                }
                using (Pen gridLinePen = new Pen(Color.Green, ))
                {
                    //绘出左线
                    e.Graphics.DrawLine(gridLinePen, left, top, left, top + height);

                }
                //绘出进度率的线
                if (e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex == )
                {
                    string str = e.Value.ToString();
                    int index =str.LastIndexOf ("/");
                    int widths = Convert.ToInt32(Convert.ToDouble(str.Substring(, index)) / Convert.ToDouble(str.Substring(index + )) * width1);
                    if (widths > width1)
                    {
                        widths = width1;
                    }
                    using (Pen gridLinePen = new Pen(Color.Blue, Convert.ToInt32(height / )))
                    {

                        e.Graphics.DrawLine(gridLinePen, left, top + height /  + Convert.ToInt32(height / ), left + widths, top + height /  + Convert.ToInt32(height /));

                    }
                }
                //画出上下线，中线和单元格的数据
                using (Pen gridLinePen = new Pen(Color.Green , ))
                {
                    float[] BlueValues = { , ,,  };
                    gridLinePen.DashPattern = BlueValues;
                    //绘出上线
                    e.Graphics.DrawLine(gridLinePen, left, top, left + width1, top);
                    //绘出下线
                    e.Graphics.DrawLine(gridLinePen, left, top + height, left + width1, top + height);
                    if (e.ColumnIndex ==  || e.ColumnIndex ==  || e.ColumnIndex == )
                    {                          

                        //绘出中线
                        e.Graphics.DrawLine(gridLinePen, left, top + height / , left + width1, top + height / );
                        e.Graphics.DrawLine(gridLinePen, left + width1/, top + height / , left + width1/, top + height);
                        e.Graphics.DrawLine(gridLinePen, left + width1 / , top + height / , left + width1 / , top + height);
                        e.Graphics.DrawLine(gridLinePen, left + width1* / , top + height / , left + width1* / , top + height);
                    }                       

                    string columnValue =e.Value.ToString () ;
                    SizeF sf = e.Graphics.MeasureString(columnValue, e.CellStyle.Font);
                    float lstr = (width1 - sf.Width) / ;
                    //float rstr = sf.Height/2;
                    float rstr = (height/ - sf.Height) / ;
                    //画出文本框数据
                    if (columnValue != "")
                    {
                        e.Graphics.DrawString(columnValue, e.CellStyle.Font,
                                                   new SolidBrush(Color.Black),
                                                     left + lstr,
                                                     top + rstr,
                                                     StringFormat.GenericDefault);
                    }
                }
                e.Handled = true;
            }
        }
    }

例图如下：