Graphics.MeasureCharacterRanges(String, Font, RectangleF, StringFormat) Graphics.MeasureCharacterRanges(String, Font, RectangleF, StringFormat) Graphics.MeasureCharacterRanges(String, Font, RectangleF, StringFormat) Method

Definizione

Ottiene una matrice di oggetti Region, ciascuno dei quali delimita un intervallo di posizioni di caratteri nella stringa specificata.Gets an array of Region objects, each of which bounds a range of character positions within the specified string.

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

Parametri

text
String String String

Stringa da misurare.String to measure.

font
Font Font Font

Oggetto Font che definisce il formato di testo della stringa.Font that defines the text format of the string.

layoutRect
RectangleF RectangleF RectangleF

Struttura RectangleF che specifica il rettangolo di layout per la stringa.RectangleF structure that specifies the layout rectangle for the string.

stringFormat
StringFormat StringFormat StringFormat

Oggetto StringFormat che rappresenta le informazioni di formattazione per la stringa, ad esempio l'interlinea.StringFormat that represents formatting information, such as line spacing, for the string.

Restituisce

Region[]

Questo metodo restituisce una matrice di oggetti Region, ciascuno dei quali delimita un intervallo di posizioni di caratteri nella stringa specificata.This method returns an array of Region objects, each of which bounds a range of character positions within the specified string.

Esempi

L'esempio di codice seguente è progettato per l'uso con Windows Forms e richiede PaintEventArgs e, che Paint è un parametro del gestore eventi.The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. Nel codice vengono eseguite le seguenti azioni:The code performs the following actions:

  • Imposta una stringa "primo e secondo intervallo" e un tipo di carattere per la visualizzazione della stringa ("Times New Roman", 16 Point).Sets a string "First and Second ranges" and a font for display of the string ("Times New Roman", 16 point).

  • Imposta due intervalli di caratteri all'interno della stringa (che corrispondono alle parole "First" e "Second").Sets two character ranges within the string (which correspond to the words "First" and "Second").

  • Crea un rettangolo in cui visualizzare la stringa.Creates a rectangle in which to display the string.

  • Imposta la formattazione della stringa 3/4, inclusi i due intervalli di caratteri.Sets the formatting of the string ¾ including the two character ranges.

  • Disegna la stringa sullo schermo.Draws the string to the screen.

  • Misura gli intervalli di caratteri, determina i rettangoli che hanno associato i due intervalli specificati.Measures the character ranges, determines rectangles that bound the two specified ranges.

  • Disegna i due rettangoli sullo schermo.Draws the two rectangles to the screen.

Il risultato è la stringa visualizzata con il primo intervallo ("First") delimitato da un rettangolo rosso e il secondo intervallo ("Second") delimitato da un rettangolo blu.The result is the displayed string with the first range ("First") bounded by a red rectangle and the second range ("Second") bounded by a blue rectangle.

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

Commenti

Le aree restituite da questo metodo sono dipendenti dalla risoluzione, pertanto potrebbe verificarsi una lieve perdita di precisione se le stringhe vengono registrate in un metafile a una risoluzione e successivamente riprodotte con una risoluzione diversa.The regions returned by this method are resolution-dependent, so there might be a slight loss of accuracy if strings are recorded in a metafile at one resolution and later played back at a different resolution.

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