CharacterRange CharacterRange CharacterRange CharacterRange Struct

Определение

Определяет диапазон позиций символа в пределах строки.Specifies a range of character positions within a string.

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

Примеры

В следующем примере кода демонстрируется создание CharacterRange и использовать его для выделения строки.The following code example demonstrates how to create a CharacterRange and use it to highlight part of a string. Этот пример предназначен для использования с Windows Forms.This example is designed to be used with Windows Forms. Вставьте пример в форму и вызовите HighlightACharacterRange метод при обработке формы Paint передачи событий e как 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

Конструкторы

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

Инициализирует новый экземпляр структуры CharacterRange, определяющей диапазон позиций символа в пределах строки.Initializes a new instance of the CharacterRange structure, specifying a range of character positions within a string.

Свойства

First First First First

Получает или устанавливает позицию первого символа диапазона CharacterRange в строке.Gets or sets the position in the string of the first character of this CharacterRange.

Length Length Length Length

Получает или задает число позиций в этом диапазоне CharacterRange.Gets or sets the number of positions in this CharacterRange.

Методы

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

Возвращает значение, показывающее, равен ли данный объект заданному объекту.Gets a value indicating whether this object is equivalent to the specified object.

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

Возвращает хэш-код данного экземпляра.Returns the hash code for this instance.

Операторы

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

Сравнивает два объекта CharacterRange.Compares two CharacterRange objects. Возвращает значение, показывающее, равны ли значенияFirst и Length двух объектов CharacterRange.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)

Сравнивает два объекта CharacterRange.Compares two CharacterRange objects. Возвращает значение, показывающее, являются ли неравными значенияFirst или Length двух объектов CharacterRange.Gets a value indicating whether the First or Length values of the two CharacterRange objects are not equal.

Применяется к