String::CompareOrdinal Method (String, String)

Compares two specified String objects by evaluating the numeric values of the corresponding Char objects in each string.

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

static int CompareOrdinal(
	String^ strA, 
	String^ strB


Type: System::String

The first string to compare.

Type: System::String

The second string to compare.

Return Value

Type: System::Int32
An integer that indicates the lexical relationship between the two comparands.



Less than zero

strA is less than strB.


strA and strB are equal.

Greater than zero

strA is greater than strB.

This method performs a case-sensitive comparison using ordinal sort rules. For more information about word, string, and ordinal sorts, see System.Globalization::CompareOptions. To perform a case-insensitive comparison using ordinal sort rules, call the Compare(String, String, StringComparison) method with the comparisonType argument set to StringComparison::OrdinalIgnoreCase.

Because CompareOrdinal(String, String) is a static method, strA and strB can be nullptr. If both values are nullptr, the method returns 0 (zero), which indicates that strA and strB are equal. If only one of the values is nullptr, the method considers the non-null value to be greater.

The following example performs and ordinal comparison of two strings that only differ in case.

// Sample for String::CompareOrdinal(String, String) 
using namespace System;
int main()
   String^ str1 = "ABCD";
   String^ str2 = "abcd";
   String^ str;
   int result;
   Console::WriteLine( "Compare the numeric values of the corresponding Char objects in each string." );
   Console::WriteLine( "str1 = '{0}', str2 = '{1}'", str1, str2 );
   result = String::CompareOrdinal( str1, str2 );
   str = ((result < 0) ? "less than" : ((result > 0) ? (String^)"greater than" : "equal to"));
   Console::Write( "String '{0}' is ", str1 );
   Console::Write( "{0} ", str );
   Console::WriteLine( "String '{0}'.", str2 );

This example produces the following results:

Compare the numeric values of the corresponding Char objects in each string.
str1 = 'ABCD', str2 = 'abcd'
String 'ABCD' is less than String 'abcd'.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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