CharacterRange CharacterRange CharacterRange CharacterRange Struct

Definizione

Specifica un intervallo di posizioni di caratteri all'interno di una stringa.Specifies a range of character positions within a string.

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

Esempi

Esempio di codice seguente viene illustrato come creare un CharacterRange e usarlo per evidenziare parte di una stringa.The following code example demonstrates how to create a CharacterRange and use it to highlight part of a string. In questo esempio è progettato per essere usato con Windows Form.This example is designed to be used with Windows Forms. Incollare l'esempio in un form e si chiama il HighlightACharacterRange metodo durante la gestione del modulo Paint evento passando e come 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

Costruttori

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

Inizializza una nuova istanza della struttura CharacterRange, specificando un intervallo di posizioni di caratteri all'interno di una stringa.Initializes a new instance of the CharacterRange structure, specifying a range of character positions within a string.

Proprietà

First First First First

Ottiene o imposta la posizione nella stringa del primo carattere di questo oggetto CharacterRange.Gets or sets the position in the string of the first character of this CharacterRange.

Length Length Length Length

Ottiene o imposta il numero di posizioni in questo CharacterRange.Gets or sets the number of positions in this CharacterRange.

Metodi

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

Ottiene un valore che indica se l'oggetto è equivalente all'oggetto specificato.Gets a value indicating whether this object is equivalent to the specified object.

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

Restituisce il codice hash per l'istanza.Returns the hash code for this instance.

Operatori

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

Confronta due oggetti CharacterRange.Compares two CharacterRange objects. Ottiene un valore che indica se i valori First e Length dei due oggetti CharacterRange sono uguali.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)

Confronta due oggetti CharacterRange.Compares two CharacterRange objects. Ottiene un valore che indica se i valori First o Length dei due oggetti CharacterRange non sono uguali.Gets a value indicating whether the First or Length values of the two CharacterRange objects are not equal.

Si applica a