StringBuilder.Remove(Int32, Int32) Method

Definition

Namespace:

System.Text

Assembly:

System.Runtime.dll

Source:

StringBuilder.cs

Removes the specified range of characters from this instance.

public:
 System::Text::StringBuilder ^ Remove(int startIndex, int length);

public System.Text.StringBuilder Remove (int startIndex, int length);

member this.Remove : int * int -> System.Text.StringBuilder

Public Function Remove (startIndex As Integer, length As Integer) As StringBuilder

Parameters

startIndex

Int32

The zero-based position in this instance where removal begins.

length

Int32

The number of characters to remove.

Returns

StringBuilder

A reference to this instance after the excise operation has completed.

Exceptions

ArgumentOutOfRangeException

If startIndex or length is less than zero, or startIndex + length is greater than the length of this instance.

Examples

The following example demonstrates the Remove method.

using namespace System;
using namespace System::Text;
int main()
{
   String^ rule1 = "0----+----1----+----2----+----3----+----4---";
   String^ rule2 = "01234567890123456789012345678901234567890123";
   String^ str = "The quick brown fox jumps over the lazy dog.";
   StringBuilder^ sb = gcnew StringBuilder( str );
   Console::WriteLine();
   Console::WriteLine( "StringBuilder.Remove method" );
   Console::WriteLine();
   Console::WriteLine( "Original value:" );
   Console::WriteLine( rule1 );
   Console::WriteLine( rule2 );
   Console::WriteLine( "{0}", sb );
   Console::WriteLine();
   sb->Remove( 10, 6 ); // Remove "brown "
   Console::WriteLine( "New value:" );
   Console::WriteLine( rule1 );
   Console::WriteLine( rule2 );
   Console::WriteLine( "{0}", sb );
}

/*
This example produces the following results:

StringBuilder.Remove method

Original value:
0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick brown fox jumps over the lazy dog.

New value:
0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick fox jumps over the lazy dog.

*/

using System;
using System.Text;

class Sample
{
    public static void Main()
    {
    string rule1 = "0----+----1----+----2----+----3----+----4---";
    string rule2 = "01234567890123456789012345678901234567890123";
    string str =   "The quick brown fox jumps over the lazy dog.";
    StringBuilder sb = new StringBuilder(str);

    Console.WriteLine();
    Console.WriteLine("StringBuilder.Remove method");
    Console.WriteLine();
    Console.WriteLine("Original value:");
    Console.WriteLine(rule1);
    Console.WriteLine(rule2);
    Console.WriteLine("{0}", sb.ToString());
    Console.WriteLine();

    sb.Remove(10, 6); // Remove "brown "

    Console.WriteLine("New value:");
    Console.WriteLine(rule1);
    Console.WriteLine(rule2);
    Console.WriteLine("{0}", sb.ToString());
    }
}
/*
This example produces the following results:

StringBuilder.Remove method

Original value:
0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick brown fox jumps over the lazy dog.

New value:
0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick fox jumps over the lazy dog.

*/

open System.Text

let rule1 = "0----+----1----+----2----+----3----+----4---"
let rule2 = "01234567890123456789012345678901234567890123"
let str = "The quick brown fox jumps over the lazy dog."
let sb = StringBuilder str

printfn "StringBuilder.Remove method\n"
printfn "Original value:"
printfn $"{rule1}"
printfn $"{rule2}"
printfn $"{sb}\n"

sb.Remove(10, 6) |> ignore // Remove "brown "

printfn "New value:"
printfn $"{rule1}"
printfn $"{rule2}"
printfn $"{sb}"

// This example produces the following results:
//       StringBuilder.Remove method
//
//       Original value:
//       0----+----1----+----2----+----3----+----4---
//       01234567890123456789012345678901234567890123
//       The quick brown fox jumps over the lazy dog.
//
//       New value:
//       0----+----1----+----2----+----3----+----4---
//       01234567890123456789012345678901234567890123
//       The quick fox jumps over the lazy dog.

Imports System.Text

Class Sample
   Public Shared Sub Main()
      Dim rule1 As String = "0----+----1----+----2----+----3----+----4---"
      Dim rule2 As String = "01234567890123456789012345678901234567890123"
      Dim str As String   = "The quick brown fox jumps over the lazy dog."
      Dim sb As New StringBuilder(str)
      
      Console.WriteLine()
      Console.WriteLine("StringBuilder.Remove method")
      Console.WriteLine()
      Console.WriteLine("Original value:")
      Console.WriteLine(rule1)
      Console.WriteLine(rule2)
      Console.WriteLine("{0}", sb.ToString())
      Console.WriteLine()
      
      sb.Remove(10, 6) ' Remove "brown "

      Console.WriteLine("New value:")
      Console.WriteLine(rule1)
      Console.WriteLine(rule2)
      Console.WriteLine("{0}", sb.ToString())
   End Sub
End Class
'
'This example produces the following results:
'
'StringBuilder.Remove method
'
'Original value:
'0----+----1----+----2----+----3----+----4---
'01234567890123456789012345678901234567890123
'The quick brown fox jumps over the lazy dog.
'
'New value:
'0----+----1----+----2----+----3----+----4---
'01234567890123456789012345678901234567890123
'The quick fox jumps over the lazy dog.
'

Remarks

The current method removes the specified range of characters from the current instance. The characters at (startIndex + length) are moved to startIndex, and the string value of the current instance is shortened by length. The capacity of the current instance is unaffected.

Note

The Remove method modifies the value of the current StringBuilder instance and returns that instance. It does not create and return a new StringBuilder object.

See also

• Replace(String, String)