Graphics.MeasureCharacterRanges 方法

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

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

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

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

Public Function MeasureCharacterRanges (text As ReadOnlySpan(Of Char), font As Font, layoutRect As RectangleF, stringFormat As StringFormat) As Region()

參數

傳回

此方法回傳一組 Region 物件陣列，每個物件會界定指定字串中某一範圍的字元位置。

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

來源:

Graphics.cs

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

傳回

此方法回傳一組 Region 物件陣列，每個物件會界定指定字串中某一範圍的字元位置。

例外狀況

範例

以下程式碼範例是為 Windows Forms 設計的，並需要 PaintEventArgse，這是 Paint 事件處理程序的參數。 此程式碼會執行下列動作：

• 設定字串「First and Second ranges」及字型（「Times New Roman」，16 點）。

• 在字串中設置兩個字元範圍（對應「First」和「Second」）。

• 建立一個矩形來顯示字串。

• 設定字串的格式為 3/4，包含兩個字元範圍。

• 把繩子拉到螢幕上。

• 測量字元範圍，決定界定兩個指定範圍的矩形。

• 將兩個矩形畫到螢幕上。

結果是顯示的字串，第一個範圍（「第一」）被紅色矩形圍住，第二個範圍（「第二」）被藍色矩形圍住。

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

此方法回傳的區域會依解析度而異，因此若字串在元檔案中以一種解析度錄製，之後以不同解析度播放，可能會有些微的準確度損失。

另請參閱

• MeasureString(String, Font)
• MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)