CharacterRange CharacterRange CharacterRange CharacterRange Struct

Definition

Gibt einen Bereich von Zeichenpositionen in einer Zeichenfolge an.Specifies a range of character positions within a string.

public value class CharacterRange
public struct CharacterRange
type CharacterRange = struct
Public Structure CharacterRange
Vererbung
CharacterRangeCharacterRangeCharacterRangeCharacterRange

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie zum Erstellen einer CharacterRange und zum Teil einer Zeichenfolge zu markieren.The following code example demonstrates how to create a CharacterRange and use it to highlight part of a string. In diesem Beispiel wird mit Windows Forms verwendet werden soll.This example is designed to be used with Windows Forms. Fügen Sie das Beispiel in einem Formular, und rufen die HighlightACharacterRange Methode bei der Behandlung des Formulars Paint Ereignis, und übergeben e als PaintEventArgs.Paste the example into a form and call the HighlightACharacterRange method when handling the form's Paint event, passing e as PaintEventArgs.

void HighlightACharacterRange( PaintEventArgs^ e )
{
   // Declare the string to draw.
   String^ message = "This is the string to highlight a word in.";

   // Declare the word to highlight.
   String^ searchWord = "string";

   // Create a CharacterRange array with the searchWord 
   // location and length.
   array<CharacterRange>^ temp = {CharacterRange( message->IndexOf( searchWord ), searchWord->Length )};
   array<CharacterRange>^ranges = temp;

   // Construct a StringFormat object.
   StringFormat^ stringFormat1 = gcnew StringFormat;

   // Set the ranges on the StringFormat object.
   stringFormat1->SetMeasurableCharacterRanges( ranges );

   // Declare the font to write the message in.
   System::Drawing::Font^ largeFont = gcnew System::Drawing::Font( FontFamily::GenericSansSerif,16.0F,GraphicsUnit::Pixel );

   // Construct a new Rectangle.
   Rectangle displayRectangle = Rectangle(20,20,200,100);

   // Convert the Rectangle to a RectangleF.
   RectangleF displayRectangleF = displayRectangle;

   // Get the Region to highlight by calling the 
   // MeasureCharacterRanges method.
   array<System::Drawing::Region^>^charRegion = e->Graphics->MeasureCharacterRanges( message, largeFont, displayRectangleF, stringFormat1 );

   // Draw the message string on the form.
   e->Graphics->DrawString( message, largeFont, Brushes::Blue, displayRectangleF );

   // Fill in the region using a semi-transparent color.
   e->Graphics->FillRegion( gcnew SolidBrush( Color::FromArgb( 50, Color::Fuchsia ) ), charRegion[ 0 ] );
   delete largeFont;
}
private void HighlightACharacterRange(PaintEventArgs e)
{

    // Declare the string to draw.
    string message = "This is the string to highlight a word in.";

    // Declare the word to highlight.
    string searchWord = "string";

    // Create a CharacterRange array with the searchWord 
    // location and length.
    CharacterRange[] ranges = 
        new CharacterRange[]{new CharacterRange
        (message.IndexOf(searchWord), searchWord.Length)};

    // Construct a StringFormat object.
    StringFormat stringFormat1 = new StringFormat();

    // Set the ranges on the StringFormat object.
    stringFormat1.SetMeasurableCharacterRanges(ranges);

    // Declare the font to write the message in.
    Font largeFont = new Font(FontFamily.GenericSansSerif, 16.0F,
        GraphicsUnit.Pixel);

    // Construct a new Rectangle.
    Rectangle displayRectangle = new Rectangle(20, 20, 200, 100);

    // Convert the Rectangle to a RectangleF.
    RectangleF displayRectangleF = (RectangleF)displayRectangle;

    // Get the Region to highlight by calling the 
    // MeasureCharacterRanges method.
    Region[] charRegion = e.Graphics.MeasureCharacterRanges(message, 
        largeFont, displayRectangleF, stringFormat1);

    // Draw the message string on the form.
    e.Graphics.DrawString(message, largeFont, Brushes.Blue, 
        displayRectangleF);

    // Fill in the region using a semi-transparent color.
    e.Graphics.FillRegion(new SolidBrush(Color.FromArgb(50, Color.Fuchsia)), 
        charRegion[0]);

    largeFont.Dispose();

}
Private Sub HighlightACharacterRange(ByVal e As PaintEventArgs)

    ' Declare the string to draw.
    Dim message As String = _
        "This is the string to highlight a word in."

    ' Declare the word to highlight.
    Dim searchWord As String = "string"

    ' Create a CharacterRange array with the searchWord 
    ' location and length.
    Dim ranges() As CharacterRange = _
        New CharacterRange() _
            {New CharacterRange(message.IndexOf(searchWord), _
            searchWord.Length)}

    ' Construct a StringFormat object.
    Dim stringFormat1 As New StringFormat

    ' Set the ranges on the StringFormat object.
    stringFormat1.SetMeasurableCharacterRanges(ranges)

    ' Declare the font to write the message in.
    Dim largeFont As Font = New Font(FontFamily.GenericSansSerif, _
        16.0F, GraphicsUnit.Pixel)

    ' Construct a new Rectangle.
    Dim displayRectangle As New Rectangle(20, 20, 200, 100)

    ' Convert the Rectangle to a RectangleF.
    Dim displayRectangleF As RectangleF = _
        RectangleF.op_Implicit(displayRectangle)

    ' Get the Region to highlight by calling the 
    ' MeasureCharacterRanges method.
    Dim charRegion() As Region = _
        e.Graphics.MeasureCharacterRanges(message, _
        largeFont, displayRectangleF, stringFormat1)

    ' Draw the message string on the form.
    e.Graphics.DrawString(message, largeFont, Brushes.Blue, _
        displayRectangleF)

    ' Fill in the region using a semi-transparent color.
    e.Graphics.FillRegion(New SolidBrush(Color.FromArgb(50, _
        Color.Fuchsia)), charRegion(0))

End Sub

Konstruktoren

CharacterRange(Int32, Int32) CharacterRange(Int32, Int32) CharacterRange(Int32, Int32) CharacterRange(Int32, Int32)

Initialisiert eine neue Instanz der CharacterRange-Struktur, die in einer Zeichenfolge einen Bereich von Zeichenpositionen angibt.Initializes a new instance of the CharacterRange structure, specifying a range of character positions within a string.

Eigenschaften

First First First First

Ruft die Position des ersten Zeichens dieses CharacterRange in der Zeichenfolge ab oder legt diese fest.Gets or sets the position in the string of the first character of this CharacterRange.

Length Length Length Length

Ruft die Anzahl von Positionen in diesem CharacterRange ab oder legt diese fest.Gets or sets the number of positions in this CharacterRange.

Methoden

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Ruft einen Wert ab, der angibt, ob dieses Objekt dem angegebenen Objekt entspricht.Gets a value indicating whether this object is equivalent to the specified object.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Gibt den Hashcode für diese Instanz zurück.Returns the hash code for this instance.

Operatoren

Equality(CharacterRange, CharacterRange) Equality(CharacterRange, CharacterRange) Equality(CharacterRange, CharacterRange) Equality(CharacterRange, CharacterRange)

Vergleicht zwei CharacterRange-Objekte.Compares two CharacterRange objects. Ruft einen Wert ab, der angibt, ob der First-Wert und Length-Wert der beiden CharacterRange-Objekte gleich sind.Gets a value indicating whether the First and Length values of the two CharacterRange objects are equal.

Inequality(CharacterRange, CharacterRange) Inequality(CharacterRange, CharacterRange) Inequality(CharacterRange, CharacterRange) Inequality(CharacterRange, CharacterRange)

Vergleicht zwei CharacterRange-Objekte.Compares two CharacterRange objects. Ruft einen Wert ab, der angibt, ob der First-Wert oder der Length-Wert der beiden CharacterRange-Objekte ungleich ist.Gets a value indicating whether the First or Length values of the two CharacterRange objects are not equal.

Gilt für: