C# | EndsWith() Method

In C#, EndsWith() is a string method. This method is used to check whether the ending of the current string instance matches with a specified string or not. If it matches, then it returns the string otherwise false. Using “foreach” loop, it is possible to check many strings. This method can be overloaded by passing different type and number of arguments to it.

• String.EndsWith(String) Method
• String.EndsWith(String, Boolean, CultureInfo) Method
• String.EndsWith(String, StringComparison) Method

String.EndsWith(String) Method

This method is used to check whether the ending of the string object matches with a particular string or not. If it matches then it returns the string otherwise return false.
Syntax: 

public bool EndsWith(string input_string)

Parameter:

input_string: It is the required string which is to be compared and type of this parameter is System.String.

Return Type: This function returns the Boolean value i.e. true if it found a match, else it will return false. Return type is System.Boolean.
Below are the programs to demonstrates the use of String.EndsWith(String) method:

• Program 1:

CSHARP

// C# program to illustrate the
// String.EndsWith(String) Method
using System;

public class GFG {

    // Main Method
    static public void Main()
    {

        // Input two string
        string str1 = "Sudo Placement++";
        string str2 = "Sudo Placement++";
        bool x, y;

        // Implement EndsWith() method
        x = str1.EndsWith("++");
        y = str2.EndsWith("--");

        // Return  match string "True"
        Console.WriteLine(x.ToString());

        // Return no match string "False"
        Console.WriteLine(y.ToString());
    }
}

Output:

True
False

• Program 2:
  

CSHARP

// C# program to illustrate the
// String.EndsWith (String) Method
using System;

public class GFG {

    // Main method
    static public void Main()
    {

        // Html ending  tag (</) will be remove
        // then print the result
        string[] input_str = {
            "

<p> GeekforGeeks Computer Science Portal </p>

",
            "<h1> GeekforGeeks Sudo Placement </h1>",
            "<h2> GeekforGeeks Placement Preparation </h2>",
            "<h3> GeekforGeeks Contribute </h3>",
            "<h4> GeekforGeeks Contribute ",
            "<h> GeekforGeeks Interview </h>",
        };

        // Display result after implementation EndsWith()
        // method in strings  ending tag  to be  removed.
        foreach(var n in input_str)
            Console.WriteLine(htmlEndTags(n));
    }

    private static string htmlEndTags(string str)
    {

        // set found false
        bool found = false;

        // To check ending tag to be found or not
        if (str.Trim().EndsWith(">")) {

            // To search  opening tag
            int end = str.LastIndexOf("</");

            // if got ending tag then remove
            if (end >= 0) {

                // found set become True
                found = true;

                // update string
                str = str.Substring(0, end);
            }
        }

        // if found to be true then
        // return after removing string
        if (found)
            str = htmlEndTags(str);

        return str;
    }
}

Note:

• If the input_string is Null then this method will give ArgumentNullException.
• This method also performs a case-sensitive and culture-sensitive comparison by using the current culture.

String.EndsWith(String, Boolean, CultureInfo) Method

This method is used to check whether the ending of current string instance matches the specified string when it compared using the specified culture. If match found, then return the string otherwise return false.
Syntax:

public bool EndsWith(string str,
                   bool case,
                   CultureInfo cul)

Parameters:

str: It is the string which is to be compared and the type of this parameter is System.String.
case: It will set true to ignore case during the comparison, otherwise false and the type of this parameter is System.Boolean.
cul: It is the Cultural information which checks how current string and str are compared. If culture is null, the current culture is used and the type of this parameter is System.Globalization.CultureInfo.

Return Value: This function returns the value of type System.Boolean that evaluates true if the str matches with the ending of current string else false.
Exception: If the value of str is null then this method will give ArgumentNullException.
Example: 

CSHARP

// C# program to illustrate the
// String. Endswith()h (string,
// bool, CultureInfo) Method
using System.Threading;
using System.Globalization;
using System;

class StringStartWith {

    // Main Method
    public static void Main(string[] args)
    {

        // Input string
        string str1 = "Geeksforgeeks";
        string str2 = "SudoPlacement ";

        // Implementation of Endswith() function
        // test for original string
        bool result_a = str1.EndsWith("Geeks", false,
                       CultureInfo.InvariantCulture);

        // test for small letter string
        bool result_b = str1.EndsWith("geeks", false,
                        CultureInfo.InvariantCulture);

        // test for capital letter string
        bool result_c = str1.EndsWith("GEEKS", false,
                       CultureInfo.InvariantCulture);

        // test in no string parameter
        bool result_d = str1.EndsWith(" ", false,
                    CultureInfo.InvariantCulture);

        // test for strin2 argument .
        bool result_x = str2.EndsWith("Sudo", false,
                       CultureInfo.InvariantCulture);

        // Display result
        Console.WriteLine(result_a);
        Console.WriteLine(result_b);
        Console.WriteLine(result_c);
        Console.WriteLine(result_d);
        Console.WriteLine(result_x);
    }
}

Output:

False
True
False
False
False

String.EndsWith Method(String, StringComparison)

This method is used to check whether the ending of current string instance matches the specified string or not when compared using the specified comparison option. If match found, then it returns the string otherwise false.
Syntax:

bool EndsWith(String str, StringComparison cType)

Parameters: 

str: It is the required string which is to be compared and type of this parameter is System.String.
cType: It is one of the enumeration values that determine how current string and str are compared. Type of this parameter is System.StringComparison. 

Return Value :This function returns the Boolean value i.e. true if it found a match, else it will return false. Return type is System.Boolean.
Exceptions:

• If the value of str is null then this method will give ArgumentNullException.
• If the value of cType is not a StringComparison value then this method will give ArgumentException.

Example:

CSHARP

// C# program to illustrate the
// EndsWith(String, StringComparison)
// method
using System;

class Sudo {

    // Main Method
    public static void Main(string[] args)
    {

        // Input two string
        string str1 = "GeeksforGeeks";
        string str2 = "Sudo Placement";
        string str3 = "Geeks Article";

        // Implementation of startswith() function
        // test for original string1 value.
        bool result_a = str1.EndsWith("Geek",
            StringComparison.CurrentCulture);

        // test for small letter string1 value .
        bool result_b = str1.EndsWith("geek",
            StringComparison.CurrentCulture);

        // test for string2 value .
        bool result_tt = str2.EndsWith("Placement",
                    StringComparison.CurrentCulture);

        bool result_t = str2.EndsWith("Sudo",
            StringComparison.CurrentCulture);

        // test for string3 value .
        bool result_x = str3.EndsWith("Article",
                StringComparison.CurrentCulture);

        bool result_xx = str3.EndsWith("Geeks",
               StringComparison.CurrentCulture);

        // Display result
        Console.WriteLine(result_a);
        Console.WriteLine(result_b);
        Console.WriteLine(result_tt);
        Console.WriteLine(result_t);
        Console.WriteLine(result_x);
        Console.WriteLine(result_xx);
    }
}

Output:

False
False
True
False
True
False

Reference: https://docs.microsoft.com/en-us/dotnet/api/system.string.endswith?view=netframework-4.7.2