private void DrawCell(DataGridViewCellPaintingEventArgs e)
{
if (e.CellStyle.Alignment == DataGridViewContentAlignment.NotSet)
{
e.CellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
}
if (!MergeColumnNames.Contains(Columns[e.ColumnIndex].Name))
{
return;
}
var rect = e.CellBounds;
var g = e.Graphics;
var upRowNum = GetUpRowNum(e.RowIndex, e.ColumnIndex);
var downRowNum = GetDownRowNum(e.RowIndex, e.ColumnIndex);
var tag = Columns[e.ColumnIndex].Tag.ToString();
if (!string.IsNullOrEmpty(tag))
{
var index = Columns[tag]?.Index;
upRowNum = GetUpRowNum(e.RowIndex, index ?? 0);
downRowNum = GetDownRowNum(e.RowIndex, index ?? 0);
}
var backBrush = new SolidBrush(e.CellStyle.BackColor);
// Fills by background color.
g.FillRectangle(backBrush, rect);
// Draws string.
DrawString(e, upRowNum, downRowNum);
// Declares a grid pen.
var gridPen = new Pen(GridColor);
// Draws bottom line.
if (downRowNum == 1)
{
g.DrawLine(gridPen, rect.Left, rect.Bottom - 1, rect.Right, rect.Bottom - 1);
}
// Draws right line.
if (e.ColumnIndex < ColumnCount - 1)
{
g.DrawLine(gridPen, rect.Right - 1, rect.Top, rect.Right - 1, rect.Bottom);
}
}
/// <summary>
/// 画单元格
/// </summary>
/// <param name="e"></param>
private void DrawCell(DataGridViewCellPaintingEventArgs e)
{
if (e.CellStyle.Alignment == DataGridViewContentAlignment.NotSet)
{
e.CellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
}
Brush gridBrush = new SolidBrush(GridColor);
var backBrush = new SolidBrush(e.CellStyle.BackColor);
var fontBrush = new SolidBrush(e.CellStyle.ForeColor);
int cellwidth;
//上面相同的行数
var upRows = 0;
//下面相同的行数
var downRows = 0;
//总行数
var count = 0;
if (MergeColumnNames.Contains(Columns[e.ColumnIndex].Name) && e.RowIndex != -1)
{
cellwidth = e.CellBounds.Width;
var gridLinePen = new Pen(gridBrush);
var curValue = e.Value == null ? "" : e.Value.ToString().Trim();
var curSelected = CurrentRow.Cells[e.ColumnIndex].Value == null ? "" : CurrentRow.Cells[e.ColumnIndex].Value.ToString().Trim();
if (!string.IsNullOrEmpty(curValue))
{
#region 获取下面的行数
for (var i = e.RowIndex; i < Rows.Count; i++)
{
if (Rows[i].Cells[e.ColumnIndex].Value.ToString().Equals(curValue))
{
//this.Rows[i].Cells[e.ColumnIndex].Selected = this.Rows[e.RowIndex].Cells[e.ColumnIndex].Selected;
downRows++;
if (e.RowIndex != i)
{
cellwidth = cellwidth < Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : Rows[i].Cells[e.ColumnIndex].Size.Width;
}
}
else
{
break;
}
}
#endregion
#region 获取上面的行数
for (var i = e.RowIndex; i >= 0; i--)
{
if (Rows[i].Cells[e.ColumnIndex].Value.ToString().Equals(curValue))
{
//this.Rows[i].Cells[e.ColumnIndex].Selected = this.Rows[e.RowIndex].Cells[e.ColumnIndex].Selected;
upRows++;
if (e.RowIndex != i)
{
cellwidth = cellwidth < Rows[i].Cells[e.ColumnIndex].Size.Width ? cellwidth : Rows[i].Cells[e.ColumnIndex].Size.Width;
}
}
else
{
break;
}
}
#endregion
count = downRows + upRows - 1;
if (count < 2)
{
return;
}
}
if (Rows[e.RowIndex].Selected)
{
backBrush.Color = e.CellStyle.SelectionBackColor;
fontBrush.Color = e.CellStyle.SelectionForeColor;
}
//以背景色填充
e.Graphics.FillRectangle(backBrush, e.CellBounds);
//画字符串
PaintingFont(e, cellwidth, upRows, downRows, count);
if (downRows == 1)
{
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Left, e.CellBounds.Bottom - 1, e.CellBounds.Right - 1, e.CellBounds.Bottom - 1);
count = 0;
}
// 画右边线
e.Graphics.DrawLine(gridLinePen, e.CellBounds.Right - 1, e.CellBounds.Top, e.CellBounds.Right - 1, e.CellBounds.Bottom);
e.Handled = true;
}
}