StringBuilder::Insert Method (Int32, String^, Int32)

 

Inserts one or more copies of a specified string into this instance at the specified character position.

Namespace:   System.Text
Assembly:  mscorlib (in mscorlib.dll)

public:
StringBuilder^ Insert(
	int index,
	String^ value,
	int count
)

Parameters

index
Type: System::Int32

The position in this instance where insertion begins.

value
Type: System::String^

The string to insert.

count
Type: System::Int32

The number of times to insert value.

Return Value

Type: System.Text::StringBuilder^

A reference to this instance after insertion has completed.

Exception Condition
ArgumentOutOfRangeException

index is less than zero or greater than the current length of this instance.

-or-

count is less than zero.

OutOfMemoryException

The current length of this StringBuilder object plus the length of value times count exceeds MaxCapacity.

Existing characters are shifted to make room for the new text. The capacity of this instance is adjusted as needed.

This StringBuilder object is not changed if value is null, value is not null but its length is zero, or count is zero.

The following example demonstrates the Insert method.

using namespace System;
using namespace System::Text;
ref class Sample
{
private:

   //                           index: 012345
   static String^ initialValue = "--[]--";
   static StringBuilder^ sb;

public:
   static void Main()
   {
      String^ xyz = "xyz";
      array<Char>^abc = {'a','b','c'};
      Char star = '*';
      Object^ obj = 0;
      bool xBool = true;
      Byte xByte = 1;
      short xInt16 = 2;
      int xInt32 = 3;
      long xInt64 = 4;
      Decimal xDecimal = 5;
      float xSingle = 6.6F;
      double xDouble = 7.7;

      // The following types are not CLS-compliant.
      UInt16 xUInt16 = 8;
      UInt32 xUInt32 = 9;
      UInt64 xUInt64 = 10;
      SByte xSByte = -11;

      //
      Console::WriteLine( "StringBuilder.Insert method" );
      sb = gcnew StringBuilder( initialValue );
      sb->Insert( 3, xyz, 2 );
      Show( 1, sb );
      sb->Insert( 3, xyz );
      Show( 2, sb );
      sb->Insert( 3, star );
      Show( 3, sb );
      sb->Insert( 3, abc );
      Show( 4, sb );
      sb->Insert( 3, abc, 1, 2 );
      Show( 5, sb );
      sb->Insert( 3, xBool ); // True
      Show( 6, sb );
      sb->Insert( 3, obj ); // 0
      Show( 7, sb );
      sb->Insert( 3, xByte ); // 1
      Show( 8, sb );
      sb->Insert( 3, xInt16 ); // 2
      Show( 9, sb );
      sb->Insert( 3, xInt32 ); // 3
      Show( 10, sb );
      sb->Insert( 3, xInt64 ); // 4
      Show( 11, sb );
      sb->Insert( 3, xDecimal ); // 5
      Show( 12, sb );
      sb->Insert( 3, xSingle ); // 6.6
      Show( 13, sb );
      sb->Insert( 3, xDouble ); // 7.7
      Show( 14, sb );

      // The following Insert methods are not CLS-compliant.
      sb->Insert( 3, xUInt16 ); // 8
      Show( 15, sb );
      sb->Insert( 3, xUInt32 ); // 9
      Show( 16, sb );
      sb->Insert( 3, xUInt64 ); // 10
      Show( 17, sb );
      sb->Insert( 3, xSByte ); // -11
      Show( 18, sb );

      //
   }

   static void Show( int overloadNumber, StringBuilder^ sbs )
   {
      Console::WriteLine( "{0,2:G} = {1}", overloadNumber, sbs );
      sb = gcnew StringBuilder( initialValue );
   }

};

int main()
{
   Sample::Main();
}

/*
This example produces the following results:

StringBuilder.Insert method
 1 = --[xyzxyz]--
 2 = --[xyz]--
 3 = --[*]--
 4 = --[abc]--
 5 = --[bc]--
 6 = --[True]--
 7 = --[0]--
 8 = --[1]--
 9 = --[2]--
10 = --[3]--
11 = --[4]--
12 = --[5]--
13 = --[6.6]--
14 = --[7.7]--
15 = --[8]--
16 = --[9]--
17 = --[10]--
18 = --[-11]--

*/

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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