DataGridView重绘代码参考.doc

1、CellFormatting事件，一般重绘单元格属性。 private Bitmap highPriImage; private Bitmap mediumPriImage; private Bitmap lowPriImage;private void dataGridView1_CellFormatting(object sender, System.Windows.Forms.DataGridViewCellFormattingEventArgs e) / Set the background to red for negative values in the Balance column. if (dataGridView1.Columnse.ColumnIndex.Name.Equals(Balance) Int32 intValue; if (Int32.TryParse(String)e.Value, out intValue) & (intValue = 0) if (this.nextcol != null & e.ColumnIndex = this.nextcol) e.CellStyle.BackColor = Color.LightBlue; this.nextcol = null; if (this.nextrow != null & e.RowIndex = nextrow) e.CellStyle.BackColor = Color.LightPink; this.nextrow = null; if (e.RowIndex != this.dataGridView1.RowCount - 1) if (e.Value.ToString() = this.dataGridView1.Rowse.RowIndex + 1.Cellse.ColumnIndex.Value.ToString() e.CellStyle.BackColor = Color.LightPink; nextrow = e.RowIndex + 1; if (this.dataGridView1.Columnsname.Index = e.ColumnIndex & e.RowIndex = 0) if (e.Value.ToString() = this.dataGridView1.Rowse.RowIndex.Cellse.ColumnIndex + 1.Value.ToString() e.CellStyle.BackColor = Color.LightBlue; nextcol = e.ColumnIndex + 1; /= /绘制单元格private void dataGridView1_CellPainting(object sender, System.Windows.Forms.DataGridViewCellPaintingEventArgs e) /纵向合并 if (this.dataGridView1.Columnsdescription.Index = e.ColumnIndex & e.RowIndex = 0) using ( Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor), backColorBrush = new SolidBrush(e.CellStyle.BackColor) using (Pen gridLinePen = new Pen(gridBrush) / 擦除原单元格背景 e.Graphics.FillRectangle(backColorBrush, e.CellBounds); /绘制线条,这些线条是单元格相互间隔的区分线条, /因为我们只对列name做处理,所以datagridview自己会处理左侧和上边缘的线条 if (e.RowIndex != this.dataGridView1.RowCount - 1) if (e.Value.ToString() != this.dataGridView1.Rowse.RowIndex + 1.Cellse.ColumnIndex.Value.ToString() e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);/下边缘的线 /绘制值 if (e.Value != null) e.Graphics.DrawString(String)e.Value, e.CellStyle.Font, Brushes.Crimson, e.CellBounds.X + 2, e.CellBounds.Y + 2, StringFormat.GenericDefault); else e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);/下边缘的线 /绘制值 if (e.Value != null) e.Graphics.DrawString(String)e.Value, e.CellStyle.Font, Brushes.Crimson, e.CellBounds.X + 2, e.CellBounds.Y + 2, StringFormat.GenericDefault); /右侧的线 e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1); e.Handled = true; /横向合并 if (this.dataGridView1.Columnsname.Index = e.ColumnIndex & e.RowIndex = 0) using ( Brush gridBrush = new SolidBrush(this.dataGridView1.GridColor), backColorBrush = new SolidBrush(e.CellStyle.BackColor) using (Pen gridLinePen = new Pen(gridBrush) / 擦除原单元格背景 e.Graphics.FillRectangle(backColorBrush, e.CellBounds); if (e.Value.ToString() != this.dataGridView1.Rowse.RowIndex.Cellse.ColumnIndex + 1.Value.ToString() /右侧的线 e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1); /绘制值 if (e.Value != null) e.Graphics.DrawString(String)e.Value, e.CellStyle.Font, Brushes.Crimson, e.CellBounds.X + 2, e.CellBounds.Y + 2, StringFormat.Generic