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StringBuilder.Equals Method (StringBuilder)

Silverlight

Returns a value indicating whether this instance is equal to a specified object.

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

'Declaration
Public Function Equals ( _
	sb As StringBuilder _
) As Boolean

Parameters

sb: Type: System.Text.StringBuilder
An object to compare with this instance or Nothing.

Return Value

Type: System.Boolean
true if this instance and sb have equal string, maximum capacity, and Capacity values; otherwise, false.

Examples

The following code uses the Equals method to check whether two StringBuilder objects are equal. The method is called repeatedly after small changes are made to each object, and the results are displayed to the console.


Imports System.Text

Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Dim sb1 As New StringBuilder("abc")
      Dim sb2 As New StringBuilder("abc", 16)

      outputBlock.Text &= vbCrLf
      outputBlock.Text += String.Format("a1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity) & vbCrLf
      outputBlock.Text += String.Format("a2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity) & vbCrLf
      outputBlock.Text += String.Format("a3) sb1.ToString() = ""{0}"", sb2.ToString() & vbCrLf = ""{1}""", _
                             sb1.ToString(), sb2.ToString())
      outputBlock.Text += String.Format("a4) sb1 equals sb2: {0}", sb1.Equals(sb2)) & vbCrLf

      outputBlock.Text &= vbCrLf
      outputBlock.Text &= "Ensure sb1 has a capacity of at least 50 characters." & vbCrLf
      sb1.EnsureCapacity(50)

      outputBlock.Text &= vbCrLf
      outputBlock.Text += String.Format("b1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity) & vbCrLf
      outputBlock.Text += String.Format("b2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity) & vbCrLf
      outputBlock.Text += String.Format("b3) sb1.ToString() = ""{0}"", sb2.ToString() & vbCrLf = ""{1}""", _
                             sb1.ToString(), sb2.ToString())
      outputBlock.Text += String.Format("b4) sb1 equals sb2: {0}", sb1.Equals(sb2)) & vbCrLf

      outputBlock.Text &= vbCrLf
      outputBlock.Text &= "Set the length of sb1 to zero." & vbCrLf
      outputBlock.Text &= "Set the capacity of sb2 to 51 characters." & vbCrLf
      sb1.Length = 0
      sb2.Capacity = 51

      outputBlock.Text &= vbCrLf
      outputBlock.Text += String.Format("c1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity) & vbCrLf
      outputBlock.Text += String.Format("c2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity) & vbCrLf
      outputBlock.Text += String.Format("c3) sb1.ToString() = ""{0}"", sb2.ToString() & vbCrLf = ""{1}""", _
                             sb1.ToString(), sb2.ToString())
      outputBlock.Text += String.Format("c4) sb1 equals sb2: {0}", sb1.Equals(sb2)) & vbCrLf
   End Sub 
End Class 
' The example displays the following output:
'       a1) sb1.Length = 3, sb1.Capacity = 16
'       a2) sb2.Length = 3, sb2.Capacity = 16
'       a3) sb1.ToString() = "abc", sb2.ToString() = "abc"
'       a4) sb1 equals sb2: True
'       
'       Ensure sb1 has a capacity of at least 50 characters.
'       
'       b1) sb1.Length = 3, sb1.Capacity = 50
'       b2) sb2.Length = 3, sb2.Capacity = 16
'       b3) sb1.ToString() = "abc", sb2.ToString() = "abc"
'       b4) sb1 equals sb2: False
'       
'       Set the length of sb1 to zero.
'       Set the capacity of sb2 to 51 characters.
'       
'       c1) sb1.Length = 0, sb1.Capacity = 50
'       c2) sb2.Length = 3, sb2.Capacity = 51
'       c3) sb1.ToString() = "", sb2.ToString() = "abc"
'       c4) sb1 equals sb2: False