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StringBuilder.Insert Method (Int32, Boolean)

May 11, 2014

Inserts the string representation of a Boolean value into this instance at the specified character position.

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

public StringBuilder Insert(
	int index,
	bool value
)

Parameters

index
Type: System.Int32
The position in this instance where insertion begins.
value
Type: System.Boolean
The value to insert.

Return Value

Type: System.Text.StringBuilder
A reference to this instance after the insert operation has completed.

ExceptionCondition
ArgumentOutOfRangeException

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

OutOfMemoryException

Enlarging the value of this instance would exceed MaxCapacity.

Boolean.ToString is used to get a string representation of value. Existing characters are shifted to make room for the new text. The capacity is adjusted as needed.

Notes to Callers

In the .NET Framework 3.5 Service Pack 1 and earlier versions, calls to this method threw an ArgumentOutOfRangeException if inserting value would cause the object's total length to exceed MaxCapacity. Starting with the .NET Framework version 4, the method throws an OutOfMemoryException.

The following example demonstrates the Insert method.


using System;
using System.Text;

class Example
{
   //                         index: 012345
   static string initialValue = "--[]--";
   static StringBuilder sb;

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      string xyz = "xyz";
      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.
      ushort xUInt16 = 8;
      uint xUInt32 = 9;
      ulong xUInt64 = 10;
      sbyte xSByte = -11;
      //
      outputBlock.Text += "StringBuilder.Insert method" + "\n";
      sb = new StringBuilder(initialValue);

      sb.Insert(3, xyz, 2);
      Show(outputBlock, 1, sb);

      sb.Insert(3, xyz);
      Show(outputBlock, 2, sb);

      sb.Insert(3, star.ToString());
      Show(outputBlock, 3, sb);

      sb.Insert(3, abc);
      Show(outputBlock, 4, sb);

      sb.Insert(3, abc, 1, 2);
      Show(outputBlock, 5, sb);

      sb.Insert(3, xBool.ToString());     // True
      Show(outputBlock, 6, sb);

      sb.Insert(3, obj.ToString());       // 0
      Show(outputBlock, 7, sb);

      sb.Insert(3, xByte.ToString());     // 1
      Show(outputBlock, 8, sb);

      sb.Insert(3, xInt16.ToString());    // 2
      Show(outputBlock, 9, sb);

      sb.Insert(3, xInt32.ToString());    // 3
      Show(outputBlock, 10, sb);

      sb.Insert(3, xInt64.ToString());    // 4
      Show(outputBlock, 11, sb);

      sb.Insert(3, xDecimal.ToString());  // 5
      Show(outputBlock, 12, sb);

      sb.Insert(3, xSingle.ToString());   // 6.6
      Show(outputBlock, 13, sb);

      sb.Insert(3, xDouble.ToString());   // 7.7
      Show(outputBlock, 14, sb);

      // The following Insert methods are not CLS-compliant.
      sb.Insert(3, xUInt16.ToString());   // 8
      Show(outputBlock, 15, sb);

      sb.Insert(3, xUInt32.ToString());   // 9
      Show(outputBlock, 16, sb);

      sb.Insert(3, xUInt64.ToString());   // 10
      Show(outputBlock, 17, sb);

      sb.Insert(3, xSByte.ToString());    // -11
      Show(outputBlock, 18, sb);
      //
   }

   public static void Show(System.Windows.Controls.TextBlock outputBlock, int overloadNumber, StringBuilder sbs)
   {
      outputBlock.Text += String.Format("{0,2:G} = {1}", overloadNumber, sbs.ToString()) + "\n";
      sb = new StringBuilder(initialValue);
   }
}
/*
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]--

*/


Windows Phone OS

Supported in: 8.1, 8.0

Afficher:
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