Image.GetBounds(GraphicsUnit) 方法

定義

命名空間:

System.Drawing

組件:

System.Drawing.Common.dll

套件:

System.Drawing.Common v8.0.0

來源:

Image.cs

取得使用指定單位之影像的界限。

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.RectangleF

Public Function GetBounds (ByRef pageUnit As GraphicsUnit) As RectangleF

參數

pageUnit

GraphicsUnit

其中一個 GraphicsUnit 值，指示周框的測量單位。

傳回

RectangleF

RectangleF，表示影像的界限 (使用指定的單位)。

範例

下列程式代碼範例示範如何使用 列舉從 Icon 句柄載入點陣圖， GraphicsUnit 以及如何使用 Round 方法繪製位圖的矩形界限。

此範例的設計目的是要與 Windows Forms 搭配使用。 Create 表單，其中包含名為的Button2按鈕。 將程式代碼貼到表單中，並將這個方法與按鈕的事件 Click 產生關聯。

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