c# - 如何更改 DatagridviewCheckboxCell 中的复选框大小

Question

我知道复选框的大小可以像这样改变。

checkBox1.Size = new Size(10, 10);

我想用 DataGridViewCheckBoxColumn 更改 DataGridview 中的复选框大小，我试图继承 DatagridviewCheckboxCell，但我发现有任何方法可以做到这一点。

class DGCBC : DataGridViewCheckBoxColumn
{
    public DGCBC()
    {
        this.CellTemplate = new DatagridviewCheckboxCustomCell();
    }

    class DatagridviewCheckboxCustomCell : DataGridViewCheckBoxCell
    {
        public int row_index { get; set; }
        /// <summary>   
        /// constructor   
        /// </summary>   
        /// 
        public DatagridviewCheckboxCustomCell()
        {
        }

        protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates elementState,
         object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle,
         DataGridViewPaintParts paintParts)
        {
            *//I tried many way in there,but it's not work*
            base.Paint(graphics, clipBounds, cellBounds, rowIndex, elementState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts);
        }

    }
}

Answer 1

要以您机器的当前样式绘制系统控件，您应该使用 ControlPaint class 中的许多便捷方法之一。 .

下面是一个示例，将三个 Checkboxes 绘制到 Panel 上:

private void panel1_Paint(object sender, PaintEventArgs e)
{
    ControlPaint.DrawCheckBox(e.Graphics, 11, 11, 22, 22, ButtonState.Checked);
    ControlPaint.DrawCheckBox(e.Graphics, 11, 44, 33, 33, ButtonState.Checked);
    ControlPaint.DrawCheckBox(e.Graphics, 11, 88, 44, 44, ButtonState.Checked);
}

当然，您需要在 CellPainting 事件中对此进行调整，以使用您想要的大小和单元格的坐标!

这是一个简单的示例，它几乎用 CheckBox填充单元格:

private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
{
    if (e.ColumnIndex == 1 && e.RowIndex >= 0)
    {
        e.PaintBackground(e.CellBounds, true);
        ControlPaint.DrawCheckBox(e.Graphics, e.CellBounds.X + 1, e.CellBounds.Y + 1, 
            e.CellBounds.Width - 2, e.CellBounds.Height - 2,
            (bool) e.FormattedValue ? ButtonState.Checked : ButtonState.Normal);
        e.Handled = true;
    }

您会想要找到适合您需要的尺寸..

请注意，您可以组合一些 ButtonState .因此，要实现平面外观，这是 DataGridView CheckBoxCells 的默认设置，您可以编写 ButtonState.Checked | ButtonState.Flat 等..:

ControlPaint.DrawCheckBox(e.Graphics, 11, 11, 22, 22, ButtonState.Checked);
ControlPaint.DrawCheckBox(e.Graphics, 11, 44, 33, 33, ButtonState.Checked | ButtonState.Flat);
ControlPaint.DrawCheckBox(e.Graphics, 11, 88, 44, 44, ButtonState.Checked | ButtonState.Flat | ButtonState.Inactive);