我正在创建一个透明的datagridview
//我得到了父背景图片
位图parentBackGround =新位图(this.Parent.BackgroundImage);
//将我想要创建的区域设置为等于网格的大小
Rectangle rect = new Rectangle(this.Location.X,this.Location.Y,this.Width,this.Height);
//在整个网格中绘制用网格覆盖的背景图像区域,形成“透明”效果。
graphics.DrawImage(parentBackGround.Clone(rect,PixelFormat.Format32bppRgb),gridBounds);
当网格父项的背景图像以正常布局显示时,一切正常,但如果布局是拉伸,居中或任何其他,透明效果消失了,您有什么想法修复它吗?
答案 0 :(得分:0)
为什么不尝试使用TransparencyKey属性(Form)? http://msdn.microsoft.com/en-us/library/system.windows.forms.form.transparencykey.aspx
答案 1 :(得分:0)
我创建一个位图并将其格式化为网格格式父级的背景图像,然后仅使用它覆盖网格的部分。
我从网格继承并覆盖这些方法:
protected override void PaintBackground(Graphics graphics, Rectangle clipBounds, Rectangle gridBounds)
{
base.PaintBackground(graphics, clipBounds, gridBounds);
if (DesignMode) return;
Control tmpParent = Parent;
int locationX = this.Location.X;
int locationY = this.Location.Y;
while (tmpParent.BackgroundImage == null)
{
locationX += tmpParent.Location.X;
locationY += tmpParent.Location.Y;
tmpParent = tmpParent.Parent;
}
Rectangle rectSource = new Rectangle(locationX, locationY, this.Width, this.Height);
Rectangle rectDest = new Rectangle(0, 0, rectSource.Width, rectSource.Height);
Bitmap b = new Bitmap(tmpParent.ClientRectangle.Width, tmpParent.ClientRectangle.Height);
Graphics.FromImage(b).DrawImage(tmpParent.BackgroundImage, tmpParent.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;
}
}