StringSplitOptions Enumeration

Referenz

Definition

Namespace:: System

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Wichtig

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Diese Enumeration gibt Optionen für anwendbare Split-Methodenüberladungen angegeben. Beispielsweise, ob leere Teilzeichenfolgen aus dem zurückgegebenen Array ausgelassen werden sollen oder Leerzeichen aus Teilzeichenfolgen abgeschnitten werden sollen.

Diese Enumeration unterstützt eine bitweise Kombination ihrer Memberwerte.

public enum class StringSplitOptions

[System.Flags]
public enum StringSplitOptions

[System.Flags]
[System.Runtime.InteropServices.ComVisible(false)]
public enum StringSplitOptions

[<System.Flags>]
type StringSplitOptions =

[<System.Flags>]
[<System.Runtime.InteropServices.ComVisible(false)>]
type StringSplitOptions =

Public Enum StringSplitOptions

Vererbung: Object

ValueType

Enum
StringSplitOptions

Attribute: FlagsAttribute ComVisibleAttribute

Felder

None

Dieses Feld verwendet die Standardoptionen beim Aufteilen von Zeichenfolgen.

RemoveEmptyEntries

Dieses lässt Arrayelemente aus, die eine leere Zeichenfolge aus dem Ergebnis enthalten.

Wenn RemoveEmptyEntries und TrimEntries angegeben werden, werden die Teilzeichenfolgen, die nur aus Leerzeichen bestehen, ebenfalls aus dem Ergebnis entfernt.

TrimEntries

Hier werden Leerzeichen am Ende aller Teilzeichenfolgen im Ergebnis entfernt. Dieses Feld ist nur in .NET 5 und höher verfügbar.

Wenn RemoveEmptyEntries und TrimEntries angegeben werden, werden die Teilzeichenfolgen, die nur aus Leerzeichen bestehen, ebenfalls aus dem Ergebnis entfernt.

Beispiele

Im folgenden Beispiel wird gezeigt, wie die Aufzählung verwendet wird, um Teilzeichenfolgen einzuschließen oder auszuschließen, die StringSplitOptions von der String.Split Methode generiert werden:

// This example demonstrates the String.Split(Char[], Boolean) and 
//                               String.Split(Char[], Int32, Boolean) methods
using namespace System;
void Show( array<String^>^entries )
{
   Console::WriteLine( "The return value contains these {0} elements:", entries->Length );
   System::Collections::IEnumerator^ myEnum = entries->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      String^ entry = safe_cast<String^>(myEnum->Current);
      Console::Write( "<{0}>", entry );
   }

   Console::Write( "{0}{0}", Environment::NewLine );
}

int main()
{
   String^ s = ",one,,,two,,,,,three,,";
   array<Char>^sep = gcnew array<Char>{
      ','
   };
   array<String^>^result;
   
   //
   Console::WriteLine( "The original string is \"{0}\".", s );
   Console::WriteLine( "The separation character is '{0}'.", sep[ 0 ] );
   Console::WriteLine();
   
   //
   Console::WriteLine( "Split the string and return all elements:" );
   result = s->Split( sep, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return all non-empty elements:" );
   result = s->Split( sep, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 elements:" );
   result = s->Split( sep, 2, StringSplitOptions::None );
   Show( result );
   
   //
   Console::WriteLine( "Split the string and return 2 non-empty elements:" );
   result = s->Split( sep, 2, StringSplitOptions::RemoveEmptyEntries );
   Show( result );
}

/*
This example produces the following results:

The original string is ",one,,,two,,,,,three,,".
The separation character is ','.

Split the string and return all elements:
The return value contains these 12 elements:
<><one><><><two><><><><><three><><>

Split the string and return all non-empty elements:
The return value contains these 3 elements:
<one><two><three>

Split the string and return 2 elements:
The return value contains these 2 elements:
<><one,,,two,,,,,three,,>

Split the string and return 2 non-empty elements:
The return value contains these 2 elements:
<one><,,two,,,,,three,,>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.
string s1 = ",ONE,,TWO,,,THREE,,";
string s2 = "[stop]" +
            "ONE[stop][stop]" +
            "TWO[stop][stop][stop]" +
            "THREE[stop][stop]";
char[] charSeparators = new char[] { ',' };
string[] stringSeparators = new string[] { "[stop]" };
string[] result;
// ------------------------------------------------------------------------------
// Split a string delimited by characters.
// ------------------------------------------------------------------------------
Console.WriteLine("1) Split a string delimited by characters:\n");

// Display the original string and delimiter characters.
Console.WriteLine($"1a) The original string is \"{s1}\".");
Console.WriteLine($"The delimiter character is '{charSeparators[0]}'.\n");

// Split a string delimited by characters and return all elements.
Console.WriteLine("1b) Split a string delimited by characters and " +
                  "return all elements:");
result = s1.Split(charSeparators, StringSplitOptions.None);
Show(result);

// Split a string delimited by characters and return all non-empty elements.
Console.WriteLine("1c) Split a string delimited by characters and " +
                  "return all non-empty elements:");
result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the original string into the string and empty string before the
// delimiter and the remainder of the original string after the delimiter.
Console.WriteLine("1d) Split a string delimited by characters and " +
                  "return 2 elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the original string into the string after the delimiter and the
// remainder of the original string after the delimiter.
Console.WriteLine("1e) Split a string delimited by characters and " +
                  "return 2 non-empty elements:");
result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// ------------------------------------------------------------------------------
// Split a string delimited by another string.
// ------------------------------------------------------------------------------
Console.WriteLine("2) Split a string delimited by another string:\n");

// Display the original string and delimiter string.
Console.WriteLine($"2a) The original string is \"{s2}\".");
Console.WriteLine($"The delimiter string is \"{stringSeparators[0]}\".\n");

// Split a string delimited by another string and return all elements.
Console.WriteLine("2b) Split a string delimited by another string and " +
                  "return all elements:");
result = s2.Split(stringSeparators, StringSplitOptions.None);
Show(result);

// Split the original string at the delimiter and return all non-empty elements.
Console.WriteLine("2c) Split a string delimited by another string and " +
                  "return all non-empty elements:");
result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Split the original string into the empty string before the
// delimiter and the remainder of the original string after the delimiter.
Console.WriteLine("2d) Split a string delimited by another string and " +
                  "return 2 elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.None);
Show(result);

// Split the original string into the string after the delimiter and the
// remainder of the original string after the delimiter.
Console.WriteLine("2e) Split a string delimited by another string and " +
                  "return 2 non-empty elements:");
result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries);
Show(result);

// Display the array of separated strings using a local function
void Show(string[] entries)
{
    Console.WriteLine($"The return value contains these {entries.Length} elements:");
    foreach (string entry in entries)
    {
        Console.Write($"<{entry}>");
    }
    Console.Write("\n\n");
}

/*
This example produces the following results:

1) Split a string delimited by characters:

1a) The original string is ",ONE,,TWO,,,THREE,,".
The delimiter character is ','.

1b) Split a string delimited by characters and return all elements:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Split a string delimited by characters and return all non-empty elements:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1d) Split a string delimited by characters and return 2 elements:
The return value contains these 2 elements:
<><ONE,,TWO,,,THREE,,>

1e) Split a string delimited by characters and return 2 non-empty elements:
The return value contains these 2 elements:
<ONE><TWO,,,THREE,,>

2) Split a string delimited by another string:

2a) The original string is "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]".
The delimiter string is "[stop]".

2b) Split a string delimited by another string and return all elements:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Split a string delimited by another string and return all non-empty elements:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2d) Split a string delimited by another string and return 2 elements:
The return value contains these 2 elements:
<><ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]>

2e) Split a string delimited by another string and return 2 non-empty elements:
The return value contains these 2 elements:
<ONE><TWO[stop][stop][stop]THREE[stop][stop]>

*/

// This example demonstrates the String.Split() methods that use
// the StringSplitOptions enumeration.
 
// Display the array of separated strings using a local function
let show  (entries: string[]) =
    printfn $"The return value contains these {entries.Length} elements:"
    for entry in entries do
        printf $"<{entry}>"
    printf "\n\n"

let s1 = ",ONE,,TWO,,,THREE,,"
let s2 = "[stop]" +
         "ONE[stop][stop]" +
         "TWO[stop][stop][stop]" +
         "THREE[stop][stop]"
let charSeparators = [| ',' |]
let stringSeparators = [| "[stop]" |]
// ------------------------------------------------------------------------------
// Split a string delimited by characters.
// ------------------------------------------------------------------------------
printfn "1) Split a string delimited by characters:\n"

// Display the original string and delimiter characters.
printfn $"1a) The original string is \"{s1}\"."
printfn $"The delimiter character is '{charSeparators[0]}'.\n"

// Split a string delimited by characters and return all elements.
printfn "1b) Split a string delimited by characters and return all elements:"
let result = s1.Split(charSeparators, StringSplitOptions.None)
show result

// Split a string delimited by characters and return all non-empty elements.
printfn "1c) Split a string delimited by characters and return all non-empty elements:"
let result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the original string into the string and empty string before the
// delimiter and the remainder of the original string after the delimiter.
printfn "1d) Split a string delimited by characters and return 2 elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.None)
show result

// Split the original string into the string after the delimiter and the
// remainder of the original string after the delimiter.
printfn "1e) Split a string delimited by characters and return 2 non-empty elements:"
let result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

// ------------------------------------------------------------------------------
// Split a string delimited by another string.
// ------------------------------------------------------------------------------
printfn "2) Split a string delimited by another string:\n"

// Display the original string and delimiter string.
printfn $"2a) The original string is \"{s2}\"."
printfn $"The delimiter string is \"{stringSeparators[0]}\".\n"

// Split a string delimited by another string and return all elements.
printfn "2b) Split a string delimited by another string and return all elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.None)
show result

// Split the original string at the delimiter and return all non-empty elements.
printfn "2c) Split a string delimited by another string and return all non-empty elements:"
let result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
show result

// Split the original string into the empty string before the
// delimiter and the remainder of the original string after the delimiter.
printfn "2d) Split a string delimited by another string and return 2 elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
show result

// Split the original string into the string after the delimiter and the
// remainder of the original string after the delimiter.
printfn "2e) Split a string delimited by another string and return 2 non-empty elements:"
let result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
show result

(*
This example produces the following results:

1) Split a string delimited by characters:

1a) The original string is ",ONE,,TWO,,,THREE,,".
The delimiter character is ','.

1b) Split a string delimited by characters and return all elements:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

1c) Split a string delimited by characters and return all non-empty elements:
The return value contains these 3 elements:
<ONE><TWO><THREE>

1d) Split a string delimited by characters and return 2 elements:
The return value contains these 2 elements:
<><ONE,,TWO,,,THREE,,>

1e) Split a string delimited by characters and return 2 non-empty elements:
The return value contains these 2 elements:
<ONE><TWO,,,THREE,,>

2) Split a string delimited by another string:

2a) The original string is "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]".
The delimiter string is "[stop]".

2b) Split a string delimited by another string and return all elements:
The return value contains these 9 elements:
<><ONE><><TWO><><><THREE><><>

2c) Split a string delimited by another string and return all non-empty elements:
The return value contains these 3 elements:
<ONE><TWO><THREE>

2d) Split a string delimited by another string and return 2 elements:
The return value contains these 2 elements:
<><ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]>

2e) Split a string delimited by another string and return 2 non-empty elements:
The return value contains these 2 elements:
<ONE><TWO[stop][stop][stop]THREE[stop][stop]>

*)

    Dim s1 As String = ",ONE,,TWO,,,THREE,,"
    Dim s2 As String = "[stop]" &
                       "ONE[stop][stop]" &
                       "TWO[stop][stop][stop]" &
                       "THREE[stop][stop]"
    Dim charSeparators() As Char = {","c}
    Dim stringSeparators() As String = {"[stop]"}
    Dim result() As String
    ' ------------------------------------------------------------------------------
    ' Split a string delimited by characters.
    ' ------------------------------------------------------------------------------
    Console.WriteLine("1) Split a string delimited by characters:" & vbCrLf)

    ' Display the original string and delimiter characters.
    Console.WriteLine("1a) The original string is ""{0}"".", s1)
    Console.WriteLine("The delimiter character is '{0}'." & vbCrLf, charSeparators(0))

    ' Split a string delimited by characters and return all elements.
    Console.WriteLine("1b) Split a string delimited by characters and " &
                      "return all elements:")
    result = s1.Split(charSeparators, StringSplitOptions.None)
    Show(result)

    ' Split a string delimited by characters and return all non-empty elements.
    Console.WriteLine("1c) Split a string delimited by characters and " &
                      "return all non-empty elements:")
    result = s1.Split(charSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the original string into the string and empty string before the 
    ' delimiter and the remainder of the original string after the delimiter.
    Console.WriteLine("1d) Split a string delimited by characters and " &
                      "return 2 elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the original string into the string after the delimiter and the 
    ' remainder of the original string after the delimiter.
    Console.WriteLine("1e) Split a string delimited by characters and " &
                      "return 2 non-empty elements:")
    result = s1.Split(charSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' ------------------------------------------------------------------------------
    ' Split a string delimited by another string.
    ' ------------------------------------------------------------------------------
    Console.WriteLine("2) Split a string delimited by another string:" & vbCrLf)

    ' Display the original string and delimiter string.
    Console.WriteLine("2a) The original string is ""{0}"".", s2)
    Console.WriteLine("The delimiter string is ""{0}""." & vbCrLf, stringSeparators(0))

    ' Split a string delimited by another string and return all elements.
    Console.WriteLine("2b) Split a string delimited by another string and " &
                      "return all elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.None)
    Show(result)

    ' Split the original string at the delimiter and return all non-empty elements.
    Console.WriteLine("2c) Split a string delimited by another string and " &
                      "return all non-empty elements:")
    result = s2.Split(stringSeparators, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

    ' Split the original string into the empty string before the 
    ' delimiter and the remainder of the original string after the delimiter.
    Console.WriteLine("2d) Split a string delimited by another string and " &
                      "return 2 elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.None)
    Show(result)

    ' Split the original string into the string after the delimiter and the 
    ' remainder of the original string after the delimiter.
    Console.WriteLine("2e) Split a string delimited by another string and " &
                      "return 2 non-empty elements:")
    result = s2.Split(stringSeparators, 2, StringSplitOptions.RemoveEmptyEntries)
    Show(result)

End Sub


' Display the array of separated strings.
Public Shared Sub Show(ByVal entries() As String)
    Console.WriteLine("The return value contains these {0} elements:", entries.Length)
    Dim entry As String
    For Each entry In entries
        Console.Write("<{0}>", entry)
    Next entry
    Console.Write(vbCrLf & vbCrLf)

End Sub

'This example produces the following results:
'
'1) Split a string delimited by characters:
'
'1a) The original string is ",ONE,,TWO,,,THREE,,".
'The delimiter character is ','.
'
'1b) Split a string delimited by characters and return all elements:
'The return value contains these 9 elements:
'<><ONE><><TWO><><><THREE><><>
'
'1c) Split a string delimited by characters and return all non-empty elements:
'The return value contains these 3 elements:
'<ONE><TWO><THREE>
'
'1d) Split a string delimited by characters and return 2 elements:
'The return value contains these 2 elements:
'<><ONE,,TWO,,,THREE,,>
'
'1e) Split a string delimited by characters and return 2 non-empty elements:
'The return value contains these 2 elements:
'<ONE><TWO,,,THREE,,>
'
'2) Split a string delimited by another string:
'
'2a) The original string is "[stop]ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]".
'The delimiter string is "[stop]".
'
'2b) Split a string delimited by another string and return all elements:
'The return value contains these 9 elements:
'<><ONE><><TWO><><><THREE><><>
'
'2c) Split a string delimited by another string and return all non-empty elements:
'The return value contains these 3 elements:
'<ONE><TWO><THREE>
'
'2d) Split a string delimited by another string and return 2 elements:
'The return value contains these 2 elements:
'<><ONE[stop][stop]TWO[stop][stop][stop]THREE[stop][stop]>
'
'2e) Split a string delimited by another string and return 2 non-empty elements:
'The return value contains these 2 elements:
'<ONE><TWO[stop][stop][stop]THREE[stop][stop]>
'

Hinweise

Die String.Split Methode gibt ein Array der Unterzeichenfolgen in einer bestimmten Zeichenfolge zurück, die durch angegebene Zeichen oder Zeichenfolgen getrennt sind. Benachbarte Trennzeichen liefern ein Arrayelement, das eine leere Zeichenfolge ("") enthält. Eine der Felder der Enumeration gibt an, ob ein Element, das eine leere Zeichenfolge enthält, in das StringSplitOptions zurückgegebene Array einbezogen werden soll.

Geben Sie das Feld an, um das None Standardverhalten der String.Split Methode aufzurufen, was nicht zum Kürzen von Leerzeichen ist und leere Teilzeichenfolgen enthalten soll.

Das TrimEntries Feld ist nur in .NET 5- und höher-Versionen verfügbar.

Gilt für

Siehe auch

Empty

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