将datagrid视图背景设置为透明 [英] Set datagrid view background to transparent

问题描述

我试图将数据网格视图的背景颜色设置为属性透明，但它表示不是有效的属性。

I tried to set the background color of a data grid view to be "transparent" from properties but it it said "not a valid property".

如何我做了吗？

推荐答案

我做了这个解决方案的一个具体的问题（当网格包含在一个表单与背景图像）通过简单的修改，您可以调整它来创建一个通用的透明网格，只要问父母是否有背景图像，否则只需使用父背景来绘制网格，这就是所有。

I did this solution to a specific problem (when the grid was contained in a form with background image) with simples modifications you can adapt it to create a generic transparent Grid, just ask if the parent have background image, else just use the parent backcolor to paint your grid, and that is all.

您必须继承DataGridView并覆盖PaintBackground方法，如下所示：

You must inherit from DataGridView and override the PaintBackground method like this:

protected override void PaintBackground(Graphics graphics, Rectangle clipBounds,  Rectangle gridBounds)
  {
    base.PaintBackground(graphics, clipBounds, gridBounds);
    Rectangle rectSource = new Rectangle(this.Location.X, this.Location.Y, this.Width, this.Height);
    Rectangle rectDest = new Rectangle(0, 0, rectSource.Width, rectSource.Height);

    Bitmap b = new Bitmap(Parent.ClientRectangle.Width, Parent.ClientRectangle.Height);
    Graphics.FromImage(b).DrawImage(this.Parent.BackgroundImage, Parent.ClientRectangle);


    graphics.DrawImage(b, rectDest, rectSource, GraphicsUnit.Pixel);
    SetCellsTransparent();
  }


public void SetCellsTransparent()
{
    this.EnableHeadersVisualStyles = false;
    this.ColumnHeadersDefaultCellStyle.BackColor = Color.Transparent;
    this.RowHeadersDefaultCellStyle.BackColor = Color.Transparent;


    foreach (DataGridViewColumn col in this.Columns)
    {
        col.DefaultCellStyle.BackColor = Color.Transparent;
        col.DefaultCellStyle.SelectionBackColor = Color.Transparent;
    }
}

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