Image.GetBounds(GraphicsUnit) 方法

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.RectangleF

Public Function GetBounds (ByRef pageUnit As GraphicsUnit) As RectangleF

参数

返回

表示 RectangleF 指定单位中图像的边界。

示例

下面的代码示例演示如何使用Icon枚举从GraphicsUnit句柄加载位图，以及如何使用Round该方法绘制位图的矩形边界。

此示例旨在与 Windows 窗体一起使用。 创建包含名为 <a0/> 的按钮的窗体。 将代码粘贴到窗体中，并将此方法与按钮 Click 的事件相关联。

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