Image.GetBounds(GraphicsUnit) 方法  
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
以指定的单位获取图像的界限。
public:
 System::Drawing::RectangleF GetBounds(System::Drawing::GraphicsUnit % pageUnit);public System.Drawing.RectangleF GetBounds (ref System.Drawing.GraphicsUnit pageUnit);member this.GetBounds : GraphicsUnit -> System.Drawing.RectangleFPublic Function GetBounds (ByRef pageUnit As GraphicsUnit) As RectangleF参数
- pageUnit
- GraphicsUnit
GraphicsUnit 值之一,指示边框的测量单位。
返回
RectangleF,以指定的单位表示图像的界限。
示例
下面的代码示例演示如何使用 GraphicsUnit 枚举从Icon句柄加载位图,以及如何使用 Round 方法绘制位图的矩形边界。
此示例旨在与 Windows 窗体 一起使用。 Create包含名为 的按钮的Button2窗体。 将代码粘贴到窗体中,并将此方法与按钮的事件 Click 相关联。
void Button2_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   Bitmap^ bitmap1 = Bitmap::FromHicon( SystemIcons::Hand->Handle );
   Graphics^ formGraphics = this->CreateGraphics();
   GraphicsUnit units = GraphicsUnit::Point;
   RectangleF bmpRectangleF = bitmap1->GetBounds( units );
   Rectangle bmpRectangle = Rectangle::Round( bmpRectangleF );
   formGraphics->DrawRectangle( Pens::Blue, bmpRectangle );
   delete formGraphics;
}
private void Button2_Click(System.Object sender, System.EventArgs e)
{
    Bitmap bitmap1 = Bitmap.FromHicon(SystemIcons.Hand.Handle);
    Graphics formGraphics = this.CreateGraphics();
    GraphicsUnit units = GraphicsUnit.Point;
    RectangleF bmpRectangleF = bitmap1.GetBounds(ref units);
    Rectangle bmpRectangle = Rectangle.Round(bmpRectangleF);
    formGraphics.DrawRectangle(Pens.Blue, bmpRectangle);
    formGraphics.Dispose();
}
Private Sub Button2_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button2.Click
    Dim bitmap1 As Bitmap = Bitmap.FromHicon(SystemIcons.Hand.Handle)
    Dim formGraphics As Graphics = Me.CreateGraphics()
    Dim units As GraphicsUnit = GraphicsUnit.Point
    Dim bmpRectangleF As RectangleF = bitmap1.GetBounds(units)
    Dim bmpRectangle As Rectangle = Rectangle.Round(bmpRectangleF)
    formGraphics.DrawRectangle(Pens.Blue, bmpRectangle)
    formGraphics.Dispose()
End Sub