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CompareInfo.LastIndexOf-Methode (String, Char, Int32, Int32, CompareOptions)
Namespace: System.Globalization
Assembly: mscorlib (in mscorlib.dll)
public virtual int LastIndexOf( string source, char value, int startIndex, int count, CompareOptions options )
Parameter
- source
- Typ: System.String
Die zu durchsuchende Zeichenfolge.
- value
- Typ: System.Char
Das Zeichen, das in der source gesucht werden soll.
- startIndex
- Typ: System.Int32
Der nullbasierte Startindex für die Rückwärtssuche.
- count
- Typ: System.Int32
Die Anzahl der Elemente im zu durchsuchenden Abschnitt.
- options
- Typ: System.Globalization.CompareOptions
Ein Wert, der definiert, wie source und value verglichen werden sollen. options ist entweder der Enumerationswert Ordinaloder eine bitweise Kombination aus einem oder mehreren der folgenden Werte: IgnoreCase, IgnoreSymbols, IgnoreNonSpace, IgnoreWidthund IgnoreKanaType.
Rückgabewert
Typ: System.Int32| Ausnahme | Bedingung |
|---|---|
| ArgumentNullException | |
| ArgumentOutOfRangeException | |
| ArgumentException |
 Hinweis |
|---|
using System; using System.Globalization; public class Example { public static void Main() { CompareInfo ci = CultureInfo.CurrentCulture.CompareInfo; string s1 = "ani\u00ADmal"; string s2 = "animal"; int position = 0; // Find the index of the soft hyphen using culture-sensitive comparison. position = ci.LastIndexOf(s1, 'm'); Console.WriteLine("'m' at position {0}", position); if (position >= 0) Console.WriteLine(ci.LastIndexOf(s1, '\u00AD', position, position + 1, CompareOptions.IgnoreCase)); position = ci.LastIndexOf(s2, 'm'); Console.WriteLine("'m' at position {0}", position); if (position >= 0) Console.WriteLine(ci.LastIndexOf(s2, '\u00AD', position, position + 1, CompareOptions.IgnoreCase)); // Find the index of the soft hyphen using ordinal comparison. position = ci.LastIndexOf(s1, 'm'); Console.WriteLine("'m' at position {0}", position, CompareOptions.Ordinal); if (position >= 0) Console.WriteLine(ci.LastIndexOf(s1, '\u00AD', position, position + 1, CompareOptions.Ordinal)); position = ci.LastIndexOf(s2, 'm'); Console.WriteLine("'m' at position {0}", position, CompareOptions.Ordinal); if (position >= 0) Console.WriteLine(ci.LastIndexOf(s2, '\u00AD', position, position + 1, CompareOptions.Ordinal)); } } // The example displays the following output: // 'm' at position 4 // 4 // 'm' at position 3 // 3 // 'm' at position 4 // 3 // 'm' at position 3 // -1
using System; using System.Globalization; public class SamplesCompareInfo { public static void Main() { // Creates CompareInfo for the InvariantCulture. CompareInfo myComp = CultureInfo.InvariantCulture.CompareInfo; // iS is the starting index of the substring. int iS = 8; // iL is the length of the substring. int iL = 18; // myT1 and myT2 are the strings used for padding. String myT1 = new String( '-', iS ); String myT2; // Searches for the ligature Æ. String myStr = "Is AE or ae the same as Æ or æ?"; myT2 = new String( '-', myStr.Length - iS - iL ); Console.WriteLine(); Console.WriteLine( "Original : {0}", myStr ); Console.WriteLine( "No options : {0}{1}{2}", myT1, myStr.Substring( iS, iL ), myT2 ); PrintMarker( " AE : ", myComp.IndexOf( myStr, "AE", iS, iL ), myComp.LastIndexOf( myStr, "AE", iS + iL - 1, iL ) ); PrintMarker( " ae : ", myComp.IndexOf( myStr, "ae", iS, iL ), myComp.LastIndexOf( myStr, "ae", iS + iL - 1, iL ) ); PrintMarker( " Æ : ", myComp.IndexOf( myStr, 'Æ', iS, iL ), myComp.LastIndexOf( myStr, 'Æ', iS + iL - 1, iL ) ); PrintMarker( " æ : ", myComp.IndexOf( myStr, 'æ', iS, iL ), myComp.LastIndexOf( myStr, 'æ', iS + iL - 1, iL ) ); Console.WriteLine( "Ordinal : {0}{1}{2}", myT1, myStr.Substring( iS, iL ), myT2 ); PrintMarker( " AE : ", myComp.IndexOf( myStr, "AE", iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, "AE", iS + iL - 1, iL, CompareOptions.Ordinal ) ); PrintMarker( " ae : ", myComp.IndexOf( myStr, "ae", iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, "ae", iS + iL - 1, iL, CompareOptions.Ordinal ) ); PrintMarker( " Æ : ", myComp.IndexOf( myStr, 'Æ', iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, 'Æ', iS + iL - 1, iL, CompareOptions.Ordinal ) ); PrintMarker( " æ : ", myComp.IndexOf( myStr, 'æ', iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, 'æ', iS + iL - 1, iL, CompareOptions.Ordinal ) ); Console.WriteLine( "IgnoreCase : {0}{1}{2}", myT1, myStr.Substring( iS, iL ), myT2 ); PrintMarker( " AE : ", myComp.IndexOf( myStr, "AE", iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, "AE", iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); PrintMarker( " ae : ", myComp.IndexOf( myStr, "ae", iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, "ae", iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); PrintMarker( " Æ : ", myComp.IndexOf( myStr, 'Æ', iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, 'Æ', iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); PrintMarker( " æ : ", myComp.IndexOf( myStr, 'æ', iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, 'æ', iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); // Searches for the combining character sequence Latin capital letter U with diaeresis or Latin small letter u with diaeresis. myStr = "Is \u0055\u0308 or \u0075\u0308 the same as \u00DC or \u00FC?"; myT2 = new String( '-', myStr.Length - iS - iL ); Console.WriteLine(); Console.WriteLine( "Original : {0}", myStr ); Console.WriteLine( "No options : {0}{1}{2}", myT1, myStr.Substring( iS, iL ), myT2 ); PrintMarker( " U\u0308 : ", myComp.IndexOf( myStr, "U\u0308", iS, iL ), myComp.LastIndexOf( myStr, "U\u0308", iS + iL - 1, iL ) ); PrintMarker( " u\u0308 : ", myComp.IndexOf( myStr, "u\u0308", iS, iL ), myComp.LastIndexOf( myStr, "u\u0308", iS + iL - 1, iL ) ); PrintMarker( " Ü : ", myComp.IndexOf( myStr, 'Ü', iS, iL ), myComp.LastIndexOf( myStr, 'Ü', iS + iL - 1, iL ) ); PrintMarker( " ü : ", myComp.IndexOf( myStr, 'ü', iS, iL ), myComp.LastIndexOf( myStr, 'ü', iS + iL - 1, iL ) ); Console.WriteLine( "Ordinal : {0}{1}{2}", myT1, myStr.Substring( iS, iL ), myT2 ); PrintMarker( " U\u0308 : ", myComp.IndexOf( myStr, "U\u0308", iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, "U\u0308", iS + iL - 1, iL, CompareOptions.Ordinal ) ); PrintMarker( " u\u0308 : ", myComp.IndexOf( myStr, "u\u0308", iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, "u\u0308", iS + iL - 1, iL, CompareOptions.Ordinal ) ); PrintMarker( " Ü : ", myComp.IndexOf( myStr, 'Ü', iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, 'Ü', iS + iL - 1, iL, CompareOptions.Ordinal ) ); PrintMarker( " ü : ", myComp.IndexOf( myStr, 'ü', iS, iL, CompareOptions.Ordinal ), myComp.LastIndexOf( myStr, 'ü', iS + iL - 1, iL, CompareOptions.Ordinal ) ); Console.WriteLine( "IgnoreCase : {0}{1}{2}", myT1, myStr.Substring( iS, iL ), myT2 ); PrintMarker( " U\u0308 : ", myComp.IndexOf( myStr, "U\u0308", iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, "U\u0308", iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); PrintMarker( " u\u0308 : ", myComp.IndexOf( myStr, "u\u0308", iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, "u\u0308", iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); PrintMarker( " Ü : ", myComp.IndexOf( myStr, 'Ü', iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, 'Ü', iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); PrintMarker( " ü : ", myComp.IndexOf( myStr, 'ü', iS, iL, CompareOptions.IgnoreCase ), myComp.LastIndexOf( myStr, 'ü', iS + iL - 1, iL, CompareOptions.IgnoreCase ) ); } public static void PrintMarker( String Prefix, int First, int Last ) { // Determines the size of the array to create. int mySize; if ( Last > First ) mySize = Last; else mySize = First; if ( mySize > -1 ) { // Creates an array of Char to hold the markers. Char[] myCharArr = new Char[mySize+1]; // Inserts the appropriate markers. if ( First > -1 ) myCharArr[First] = 'f'; if ( Last > -1 ) myCharArr[Last] = 'l'; if ( First == Last ) myCharArr[First] = 'b'; // Displays the array of Char as a String. Console.WriteLine( "{0}{1}", Prefix, new String( myCharArr ) ); } else Console.WriteLine( Prefix ); } } /* This code produces the following output. Original : Is AE or ae the same as Æ or æ? No options : -------- ae the same as Æ ----- AE : b ae : b Æ : b æ : b Ordinal : -------- ae the same as Æ ----- AE : ae : b Æ : b æ : IgnoreCase : -------- ae the same as Æ ----- AE : f l ae : f l Æ : f l æ : f l Original : Is U" or u" the same as Ü or ü? No options : -------- u" the same as Ü ----- U" : b u" : b Ü : b ü : b Ordinal : -------- u" the same as Ü ----- U" : u" : b Ü : b ü : IgnoreCase : -------- u" the same as Ü ----- U" : f l u" : f l Ü : f l ü : f l */
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