Graphics.MeasureCharacterRanges 方法

參考

定義

命名空間:: System.Drawing

組件:: System.Drawing.Common.dll

組件:: System.Drawing.dll

套件:: System.Drawing.Common v8.0.6

套件:: System.Drawing.Common v9.0.0-preview.5.24306.5

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

多載

MeasureCharacterRanges(String, Font, RectangleF, StringFormat)	取得 Region 物件的陣列，每個物件都會係結指定字串內的字元位置範圍。
MeasureCharacterRanges(ReadOnlySpan<Char>, Font, RectangleF, StringFormat)	取得 Region 物件的陣列，每個物件都會係結指定字串內的字元位置範圍。

MeasureCharacterRanges(String, Font, RectangleF, StringFormat)

來源:: Graphics.cs

來源:: Graphics.cs

來源:: Graphics.cs

來源:: Graphics.cs

來源:: Graphics.cs

取得 Region 物件的陣列，每個物件都會係結指定字串內的字元位置範圍。

public:
 cli::array <System::Drawing::Region ^> ^ MeasureCharacterRanges(System::String ^ text, System::Drawing::Font ^ font, System::Drawing::RectangleF layoutRect, System::Drawing::StringFormat ^ stringFormat);

public System.Drawing.Region[] MeasureCharacterRanges (string? text, System.Drawing.Font font, System.Drawing.RectangleF layoutRect, System.Drawing.StringFormat? stringFormat);

public System.Drawing.Region[] MeasureCharacterRanges (string text, System.Drawing.Font font, System.Drawing.RectangleF layoutRect, System.Drawing.StringFormat stringFormat);

member this.MeasureCharacterRanges : string * System.Drawing.Font * System.Drawing.RectangleF * System.Drawing.StringFormat -> System.Drawing.Region[]

Public Function MeasureCharacterRanges (text As String, font As Font, layoutRect As RectangleF, stringFormat As StringFormat) As Region()

參數

text: String

要測量的字串。

font: Font

Font，定義字串的文字格式。

layoutRect: RectangleF

RectangleF 結構，指定字串的配置矩形。

stringFormat: StringFormat

StringFormat，代表字串的格式資訊，例如行距。

傳回

Region[]

這個方法會傳回 Region 對象的陣列，每個數位都會系結指定字串內的字元位置範圍。

例外狀況

ArgumentNullException

font null。

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：

設定字串「First 和 Second ranges」和字型來顯示字串（“Times New Roman”， 16 點）。
設定字串內的兩個字元範圍（對應至 “First” 和 “Second” 字組）。
建立要在其中顯示字串的矩形。
設定字串 3/4 的格式設定，包括兩個字元範圍。
將字串繪製到畫面。
測量字元範圍，決定系結兩個指定範圍的矩形。
將兩個矩形繪製到畫面。

結果是顯示字串，第一個範圍（“First”）以紅色矩形和第二個範圍（“Second”）系結於藍色矩形。

public:
   void MeasureCharacterRangesRegions( PaintEventArgs^ e )
   {
      // Set up string.
      String^ measureString = "First and Second ranges";
      System::Drawing::Font^ stringFont = gcnew System::Drawing::Font( "Times New Roman",16.0F );

      // Set character ranges to "First" and "Second".
      array<CharacterRange>^ characterRanges = {CharacterRange(0,5),CharacterRange(10,6)};

      // Create rectangle for layout.
      float x = 50.0F;
      float y = 50.0F;
      float width = 35.0F;
      float height = 200.0F;
      RectangleF layoutRect = RectangleF(x,y,width,height);

      // Set string format.
      StringFormat^ stringFormat = gcnew StringFormat;
      stringFormat->FormatFlags = StringFormatFlags::DirectionVertical;
      stringFormat->SetMeasurableCharacterRanges( characterRanges );

      // Draw string to screen.
      e->Graphics->DrawString( measureString, stringFont, Brushes::Black, x, y, stringFormat );

      // Measure two ranges in string.
      array<System::Drawing::Region^>^stringRegions = e->Graphics->MeasureCharacterRanges( measureString, 
    stringFont, layoutRect, stringFormat );

      // Draw rectangle for first measured range.
      RectangleF measureRect1 = stringRegions[ 0 ]->GetBounds( e->Graphics );
      e->Graphics->DrawRectangle( gcnew Pen( Color::Red,1.0f ), Rectangle::Round( measureRect1 ) );

      // Draw rectangle for second measured range.
      RectangleF measureRect2 = stringRegions[ 1 ]->GetBounds( e->Graphics );
      e->Graphics->DrawRectangle( gcnew Pen( Color::Blue,1.0f ), Rectangle::Round( measureRect2 ) );
   }

private void MeasureCharacterRangesRegions(PaintEventArgs e)
{

    // Set up string.
    string measureString = "First and Second ranges";
    Font stringFont = new Font("Times New Roman", 16.0F);

    // Set character ranges to "First" and "Second".
    CharacterRange[] characterRanges = { new CharacterRange(0, 5), new CharacterRange(10, 6) };

    // Create rectangle for layout.
    float x = 50.0F;
    float y = 50.0F;
    float width = 35.0F;
    float height = 200.0F;
    RectangleF layoutRect = new RectangleF(x, y, width, height);

    // Set string format.
    StringFormat stringFormat = new StringFormat();
    stringFormat.FormatFlags = StringFormatFlags.DirectionVertical;
    stringFormat.SetMeasurableCharacterRanges(characterRanges);

    // Draw string to screen.
    e.Graphics.DrawString(measureString, stringFont, Brushes.Black, x, y, stringFormat);

    // Measure two ranges in string.
    Region[] stringRegions = e.Graphics.MeasureCharacterRanges(measureString, 
stringFont, layoutRect, stringFormat);

    // Draw rectangle for first measured range.
    RectangleF measureRect1 = stringRegions[0].GetBounds(e.Graphics);
    e.Graphics.DrawRectangle(new Pen(Color.Red, 1), Rectangle.Round(measureRect1));

    // Draw rectangle for second measured range.
    RectangleF measureRect2 = stringRegions[1].GetBounds(e.Graphics);
    e.Graphics.DrawRectangle(new Pen(Color.Blue, 1), Rectangle.Round(measureRect2));
}

Private Sub MeasureCharacterRangesRegions(ByVal e As PaintEventArgs)

    ' Set up string.
    Dim measureString As String = "First and Second ranges"
    Dim stringFont As New Font("Times New Roman", 16.0F)

    ' Set character ranges to "First" and "Second".
    Dim characterRanges As CharacterRange() = _
    {New CharacterRange(0, 5), New CharacterRange(10, 6)}

    ' Create rectangle for layout.
    Dim x As Single = 50.0F
    Dim y As Single = 50.0F
    Dim width As Single = 35.0F
    Dim height As Single = 200.0F
    Dim layoutRect As New RectangleF(x, y, width, height)

    ' Set string format.
    Dim stringFormat As New StringFormat
    stringFormat.FormatFlags = StringFormatFlags.DirectionVertical
    stringFormat.SetMeasurableCharacterRanges(characterRanges)

    ' Draw string to screen.
    e.Graphics.DrawString(measureString, stringFont, Brushes.Black, _
    x, y, stringFormat)

    ' Measure two ranges in string.
    Dim stringRegions() As [Region] = e.Graphics.MeasureCharacterRanges(measureString, _
stringFont, layoutRect, stringFormat)

    ' Draw rectangle for first measured range.
    Dim measureRect1 As RectangleF = _
    stringRegions(0).GetBounds(e.Graphics)
    e.Graphics.DrawRectangle(New Pen(Color.Red, 1), _
    Rectangle.Round(measureRect1))

    ' Draw rectangle for second measured range.
    Dim measureRect2 As RectangleF = _
    stringRegions(1).GetBounds(e.Graphics)
    e.Graphics.DrawRectangle(New Pen(Color.Blue, 1), _
    Rectangle.Round(measureRect2))
End Sub

備註

這個方法傳回的區域相依於解析，因此，如果字串以一個解析度記錄在元檔中，稍後在不同的解析度播放時，可能會稍微遺失精確度。

另請參閱

適用於

MeasureCharacterRanges(ReadOnlySpan<Char>, Font, RectangleF, StringFormat)

來源:: Graphics.cs

來源:: Graphics.cs

來源:: Graphics.cs