C# String Equals(String, String, StringComparison)

Description

String Equals(String, String, StringComparison) determines whether two specified String objects have the same value. A parameter specifies the culture, case, and sort rules used in the comparison.

Syntax

String.Equals(String, String, StringComparison) has the following syntax.


public static bool Equals(
  string a,//from  w  ww.  j  a v a  2  s.  c o  m
  string b,
  StringComparison comparisonType
)

Parameters

String.Equals(String, String, StringComparison) has the following parameters.

a - The first string to compare, or null.
b - The second string to compare, or null.
comparisonType - One of the enumeration values that specifies the rules for the comparison.

Returns

String.Equals(String, String, StringComparison) method returns true if the value of the a parameter is equal to the value of the b parameter; otherwise, false.

Example


//ww  w  .  j  a  v a  2s . c o  m
using System;
using System.Globalization;
using System.Threading;

public class Example
{
   public static void Main()
   {
      String[] cultureNames = { "en-US", "se-SE" };
      String[] strings1 = { "case",  "encyclop?dia",  
                            "encyclop?dia", "Arch?ology" };
      String[] strings2 = { "Case", "encyclopaedia", 
                            "encyclopedia" , "ARCH?OLOGY" };
      StringComparison[] comparisons = (StringComparison[]) Enum.GetValues(typeof(StringComparison));

      foreach (var cultureName in cultureNames) {
         Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(cultureName);
         Console.WriteLine("Current Culture: {0}", CultureInfo.CurrentCulture.Name);
         for (int ctr = 0; ctr <= strings1.GetUpperBound(0); ctr++) {
            foreach (var comparison in comparisons) 
               Console.WriteLine("   {0} = {1} ({2}): {3}", strings1[ctr],
                                 strings2[ctr], comparison, 
                                 String.Equals(strings1[ctr], strings2[ctr], comparison));

            Console.WriteLine();         
         }
         Console.WriteLine();
      }
   }
}

The code above generates the following result.