StringBuilder.Append Method (array<Char[], Int32, Int32)

Parameters

• value
  Type: array<System.Char[]
  A character array.

• startIndex
  Type: System.Int32
  The starting position in value.

• charCount
  Type: System.Int32
  The number of characters to append.

Return Value

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

Dim chars() As Char = { "a"c, "b"c, "c"c, "d"c, "e"c}
Dim sb As New System.Text.StringBuilder()
Dim startPosition As Integer = Array.IndexOf(chars, "a"c)
Dim endPosition As Integer = Array.IndexOf(chars, "c"c)
If startPosition >= 0 AndAlso endPosition >= 0 Then
   sb.Append("The array from positions ").Append(startPosition).
             Append(" to ").Append(endPosition).Append(" contains ").
             Append(chars, startPosition, endPosition + 1).Append(".")
   outputBlock.Text += sb.ToString() + vbCrLf
End If             
' The example displays the following output:
'       The array from positions 0 to 2 contains abc.

char[] chars = { 'a', 'b', 'c', 'd', 'e'};
System.Text.StringBuilder sb = new System.Text.StringBuilder();
int startPosition = Array.IndexOf(chars, 'a');
int endPosition = Array.IndexOf(chars, 'c');
if (startPosition >= 0 && endPosition >= 0) {
   sb.Append("The array from positions ").Append(startPosition).
             Append(" to ").Append(endPosition).Append(" contains ").
             Append(chars, startPosition, endPosition + 1).Append(".");
   outputBlock.Text += sb + Environment.NewLine;
}             
// The example displays the following output:
//       The array from positions 0 to 2 contains abc.

Imports System.Text

Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Dim sep As String = ", "
      Dim head As String = "<<<"
      Dim tail As Char() = {">"c, ">"c, ">"c}
      Dim dash As Char = "-"c
      Dim obj As [Object] = 0

      Dim xBool As Boolean = True
      Dim xByte As Byte = 1
      Dim xInt16 As Short = 2
      Dim xInt32 As Integer = 3
      Dim xInt64 As Long = 4
      Dim xDecimal As [Decimal] = 5
      Dim xSingle As Single = 6.6F
      Dim xDouble As Double = 7.7

      ' The following types are not CLS-compliant.
      Dim xUInt16 As UShort = 8
      Dim xUInt32 As UInteger = 9
      Dim xUInt64 As ULong = 10
      Dim xSByte As SByte = -11
      '
      Dim sb As New StringBuilder()

      sb = sb.Append(head)              ' <<<
      sb = sb.Append(head, 2, 1)        ' <<<<
      sb = sb.Append(dash)              ' <<<<-
      sb = sb.Append(dash).Append(dash) ' <<<<---
      sb = sb.Append(xBool).Append(sep)
      sb = sb.Append(obj).Append(sep).Append(xByte).Append(sep)
      sb = sb.Append(xInt16)
      sb = sb.Append(sep)
      sb = sb.Append(xInt32)
      sb = sb.Append(sep)
      sb = sb.Append(xInt64)
      sb = sb.Append(sep)
      sb = sb.Append(xDecimal).Append(sep)
      sb = sb.Append(xSingle).Append(sep).Append(xDouble)

      ' The following Append methods are not CLS-compliant.
      sb.Append(xUInt16).Append(sep)
      sb.Append(xUInt32).Append(sep).Append(xUInt64).Append(sep)
      sb.Append(xSByte)
      '
      sb = sb.Append(dash, 3)           ' ---
      sb = sb.Append(tail)              ' --->>>
      sb = sb.Append(tail, 2, 1)        ' --->>>>
      Dim str As [String] = sb.ToString()
      outputBlock.Text &= "The appended string is:" & vbCrLf
      outputBlock.Text &= str & vbCrLf
   End Sub 'Main
End Class 'Sample
'
'This example produces the following results:
'The appended string is:
'<<<<---True, 0, 1, 2, 3, 4, 5, 6.6, 7.78, 9, 10, -11--->>>>
'

using System;
using System.Text;

class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      string sep = ", ";
      string head = "<<<";
      char[] tail = { '>', '>', '>' };
      char dash = '-';
      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;
      //
      StringBuilder sb = new StringBuilder();

      sb = sb.Append(head);                // <<<
      sb = sb.Append(head, 2, 1);          // <<<<
      sb = sb.Append(dash);                // <<<<-
      sb = sb.Append(dash).Append(dash);   // <<<<---

      sb = sb.Append(xBool).Append(sep);
      sb = sb.Append(obj).Append(sep).Append(xByte).Append(sep);
      sb = sb.Append(xInt16);
      sb = sb.Append(sep);
      sb = sb.Append(xInt32);
      sb = sb.Append(sep);
      sb = sb.Append(xInt64);
      sb = sb.Append(sep);
      sb = sb.Append(xDecimal).Append(sep);
      sb = sb.Append(xSingle).Append(sep).Append(xDouble).Append(sep);

      // The following Append methods are not CLS-compliant.
      sb = sb.Append(xUInt16).Append(sep);
      sb = sb.Append(xUInt32).Append(sep).Append(xUInt64).Append(sep);
      sb = sb.Append(xSByte);
      //
      sb = sb.Append(dash, 3);             // ---
      sb = sb.Append(tail);                // --->>>
      sb = sb.Append(tail, 2, 1);          // --->>>>

      String str = sb.ToString();
      outputBlock.Text += "The appended string is:" + "\n";
      outputBlock.Text += str + "\n";
   }
}
/*
This example produces the following results:
The appended string is:
<<<<---True, 0, 1, 2, 3, 4, 5, 6.6, 7.7, 8, 9, 10, -11--->>>>
*/