String.Compare Method (String, String)

Parameters

• strA
  Type: System.String
  The first string to compare.

• strB
  Type: System.String
  The second string to compare.

Return Value

Type: System.Int32
A 32-bit signed integer indicating the lexical relationship between the two comparands.

Imports System.Collections.Generic
Imports System.Text

Public Class Example
   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      Dim myAL As New List(Of String)
      ' Creates and initializes a new ArrayList.
      myAL.Add("Eric")
      myAL.Add("Mark")
      myAL.Add("Lance")
      myAL.Add("Rob")
      myAL.Add("Kris")
      myAL.Add("Brad")
      myAL.Add("Kit")
      myAL.Add("Bradley")
      myAL.Add("Keith")
      myAL.Add("Susan")

      ' Displays the properties and values of the List.
      outputBlock.Text += String.Format("Count: {0}", myAL.Count) & vbCrLf
      PrintValues(outputBlock, "Unsorted", myAL)
      myAL.Sort()
      PrintValues(outputBlock, "Sorted", myAL)
      Dim comp As New ReverseStringComparer
      myAL.Sort(comp)
      PrintValues(outputBlock, "Reverse", myAL)
   End Sub 

   Public Shared Sub PrintValues(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal title As String, _
                                 ByVal myList As IEnumerable(Of String))
      outputBlock.Text += String.Format("{0,10}: ", title)
      Dim sb As New StringBuilder()
      Dim s As String
      For Each s In myList
         sb.AppendFormat("{0}, ", s)
      Next s
      sb.Remove(sb.Length - 2, 2)
      outputBlock.Text &= sb.ToString() & vbCrLf
   End Sub
End Class 'SamplesArrayList

Public Class ReverseStringComparer
   Implements IComparer(Of String)

   Function Compare(ByVal x As String, ByVal y As String) As Integer _
            Implements IComparer(Of String).Compare
      Dim s1 As String = CStr(x)
      Dim s2 As String = CStr(y)

      'negate the return value to get the reverse order
      Return -[String].Compare(s1, s2)

   End Function
End Class 

using System;
using System.Text;
using System.Collections.Generic;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      // Creates and initializes a new generic List.
      List<string> myAL = new List<string>();
      myAL.Add("Eric");
      myAL.Add("Mark");
      myAL.Add("Lance");
      myAL.Add("Rob");
      myAL.Add("Kris");
      myAL.Add("Brad");
      myAL.Add("Kit");
      myAL.Add("Bradley");
      myAL.Add("Keith");
      myAL.Add("Susan");

      // Displays the properties and values of  the ArrayList.
      outputBlock.Text += String.Format("Count: {0}", myAL.Count) + "\n";

      PrintValues(outputBlock, "Unsorted", myAL);
      myAL.Sort();
      PrintValues(outputBlock, "Sorted", myAL);
      myAL.Sort(new ReverseStringComparer());
      PrintValues(outputBlock, "Reverse", myAL);
   }

   public static void PrintValues(System.Windows.Controls.TextBlock outputBlock, string title, IEnumerable<string> myList)
   {
      outputBlock.Text += String.Format("{0,10}: ", title);
      StringBuilder sb = new StringBuilder();
      foreach (string s in myList)
      {
         sb.AppendFormat("{0}, ", s);
      }
      sb.Remove(sb.Length - 2, 2);
      outputBlock.Text += sb + "\n";
   }
}
public class ReverseStringComparer : IComparer<string>
{
   public int Compare(string x, string y)
   {
      string s1 = x as string;
      string s2 = y as string;
      //negate the return value to get the reverse order
      return -String.Compare(s1, s2);

   }
}