FontFamily.GetEmHeight(FontStyle) 方法

定義

命名空間:

System.Drawing

組件:

System.Drawing.Common.dll

取得指定樣式之 em 平方的高度，以字型設計單位表示。

public:
 int GetEmHeight(System::Drawing::FontStyle style);

public int GetEmHeight (System.Drawing.FontStyle style);

member this.GetEmHeight : System.Drawing.FontStyle -> int

Public Function GetEmHeight (style As FontStyle) As Integer

參數

style

FontStyle

要取得 em 高度的 FontStyle。

傳回

Int32

em 平方的高度。

範例

下列程式代碼範例是專為搭配 Windows Forms 使用而設計，而且需要 PaintEventArgse，這是 Paint 事件處理程式的參數。 程式代碼會執行下列動作：

• 建立 FontFamily。

• 取得該字型系列的 em 平方高度。

• 將 em 高度的值繪製到螢幕做為文字。

public:
   void GetEmHeight_Example( PaintEventArgs^ e )
   {
      // Create a FontFamily object.
      FontFamily^ emFontFamily = gcnew FontFamily( "arial" );

      // Get the em height of the font family in design units.
      int emHeight = emFontFamily->GetEmHeight( FontStyle::Regular );

      // Draw the result as a string to the screen.
      e->Graphics->DrawString( String::Format( "emFontFamily.GetEmHeight() returns {0}.", emHeight ),
            gcnew System::Drawing::Font( emFontFamily,16 ), Brushes::Black, PointF(0,0) );
   }

public void GetEmHeight_Example(PaintEventArgs e)
{
    // Create a FontFamily object.
    FontFamily emFontFamily = new FontFamily("arial");
             
    // Get the em height of the font family in design units.
    int emHeight = emFontFamily.GetEmHeight(FontStyle.Regular);
             
    // Draw the result as a string to the screen.
    e.Graphics.DrawString(
        "emFontFamily.GetEmHeight() returns " + emHeight.ToString() + ".",
        new Font(emFontFamily, 16),
        Brushes.Black,
        new PointF(0, 0));
}

Public Sub GetEmHeight_Example(ByVal e As PaintEventArgs)

    ' Create a FontFamily object.
    Dim emFontFamily As New FontFamily("arial")

    ' Get the em height of the font family in design units.
    Dim emHeight As Integer = _
    emFontFamily.GetEmHeight(FontStyle.Regular)

    ' Draw the result as a string to the screen.
    e.Graphics.DrawString("emFontFamily.GetEmHeight() returns " & _
    emHeight.ToString() + ".", New Font(emFontFamily, 16), _
    Brushes.Black, New PointF(0, 0))
End Sub

備註

Em 方形 是一個印刷樣式字詞，是指字型最寬字母所佔用的矩形，傳統上是字母 M。

另請參閱

• 如何：取得字型計量