要创建具有额外内容的DataGridView 单元格,您需要编写CellPainting 事件。
首先,您将单元格设置为有足够的空间容纳额外的内容并根据需要布置正常内容..:
DataGridView DGV = dataGridView1; // quick reference
Font fatFont = new Font("Arial Black", 22f);
DGV .DefaultCellStyle.Font = fatFont;
DGV .RowTemplate.Height = 70;
DGV .DefaultCellStyle.Alignment = DataGridViewContentAlignment.TopCenter;
接下来我填写一些内容;我将额外的内容添加到单元格的Tags。对于具有更多字体等的更复杂的事物,您将需要创建一个类或结构来保存它,也许也在Tags..
DGV.Rows.Clear();
DGV.Rows.Add(3);
DGV[1, 0].Value = "Na"; DGV[1, 0].Tag = "Natrium";
DGV[1, 1].Value = "Fe"; DGV[1, 1].Tag = "Ferrum";
DGV[1, 2].Value = "Au"; DGV[1, 2].Tag = "Aurum";
下面是编码CellPainting事件的示例:
private void dataGridView1_CellPainting(object sender,
DataGridViewCellPaintingEventArgs e)
{
if (e.RowIndex < 0) return; // header? nothing to do!
if (e.ColumnIndex == yourAnnotatedColumnIndex )
{
DataGridViewCell cell = dataGridView1[e.ColumnIndex, e.RowIndex];
string footnote = "";
if (cell.Tag != null) footnote = cell.Tag.ToString();
int y = e.CellBounds.Bottom - 15; // pick your font height
e.PaintBackground(e.ClipBounds, true); // show selection? why not..
e.PaintContent(e.ClipBounds); // normal content
using (Font smallFont = new Font("Times", 8f))
e.Graphics.DrawString(footnote, smallFont,
cell.Selected ? Brushes.White : Brushes.Black, e.CellBounds.Left, y);
e.Handled = true;
}
}
对于更长的多行脚注,您可以使用边界 Rectangle 而不仅仅是 x&y 坐标..