Assembly : System.Drawing (dans system.drawing.dll)
SyntaxePublic Structure CharacterRange
Dim instance As CharacterRange
public struct CharacterRange
public value class CharacterRange
public final class CharacterRange extends ValueType
JScript prend en charge l'utilisation de structures mais pas la déclaration de nouvelles structures.
ExempleL'exemple de code suivant montre comment créer un CharacterRange et l'utiliser pour mettre en surbrillance une partie d'une chaîne. Cet exemple est conçu pour être utilisé avec Windows Forms. Collez l'exemple dans un formulaire et appelez la méthode HighlightACharacterRange lors de la gestion de l'événement Paint du formulaire, en passant l'argument e comme PaintEventArgs.
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
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(); }
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.get_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.get_GenericSansSerif(), 16, GraphicsUnit.Pixel); // Construct a new Rectangle. Rectangle displayRectangle = new Rectangle(20, 20, 200, 100); // Convert the Rectangle to a RectangleF. RectangleF displayRectangleF = RectangleF.op_Implicit(displayRectangle); // Get the Region to highlight by calling the // MeasureCharacterRanges method. Region charRegion[] = e.get_Graphics().MeasureCharacterRanges(message, largeFont, displayRectangleF, stringFormat1); // Draw the message string on the form. e.get_Graphics().DrawString(message, largeFont, Brushes.get_Blue(), displayRectangleF); // Fill in the region using a semi-transparent color. e.get_Graphics().FillRegion(new SolidBrush(Color.FromArgb(50, Color.get_Fuchsia())), charRegion[0]); largeFont.Dispose(); } //HighlightACharacterRange
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Plates-formesWindows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Édition Media Center, Windows XP Professionnel Édition x64, Windows XP SP2, Windows XP Starter Edition
Le .NET Framework ne prend pas en charge toutes les versions de chaque plate-forme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise.
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