C# | Char。GetUnicodeCategory(String，Int32)方法示例

原文:https://www . geeksforgeeks . org/c-sharp-char-getunicodecategorystring-int 32-method-with-examples/

此方法用于将指定字符串中指定位置的字符分类到由其中一个 UnicodeCategory 值标识的组中。

语法:

公共静态系统。UnicodeCategory GetUnicodeCategory(字符串 s，int index)；

参数:

s :是弦。
索引:是 s 中的人物位置。

返回值:该方法返回一个 UnicodeCategory 枚举常量，该常量标识包含位于的中位置索引处的字符的组。

异常:

参数空异常:如果 s 为空。
argumentout of range exception:如果指数小于零或者大于 s 中的最后一个位置。

以下程序说明了字符的使用。GetUnicodeCategory(String，Int32) 方法:

例 1:

// C# program to demonstrate the
// Char.GetUnicodeCategory(String,
// Int32) Method
using System;
using System.Globalization;

class GFG {

    // Main Method
    public static void Main()
    {
        try {

            // calling check() Method
            check("1234", 3);
            check("Tsunami", 0);
            check("psyc0lo", 2);
        }
        catch (ArgumentNullException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentOutOfRangeException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }

    // Defining check() method
    public static void check(string s, int i)
    {

        // checking condition
        // using GetNumericValue() Method
        UnicodeCategory val = Char.GetUnicodeCategory(s, i);

        // Display the values
        Console.WriteLine("the letter present at "+
                      "index {0} is {1} ", i, val);
    }
}

Output:

the letter present at index 3 is DecimalDigitNumber 
the letter present at index 0 is UppercaseLetter 
the letter present at index 2 is LowercaseLetter

示例 2: 适用于参数异常

// C# program to demonstrate the
// Char.GetUnicodeCategory(String,
// Int32) Method
using System;
using System.Globalization;

class GFG {

    // Main Method
    public static void Main()
    {
        try {

            // calling check() Method
            check("1234", 3);
            check("Tsunami", 0);
            check("psyc0lo", 2);
            Console.WriteLine("");
            Console.WriteLine("s is null");
            check(null, 2);
        }
        catch (ArgumentNullException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentOutOfRangeException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
    // Defining check() method
    public static void check(string s, int i)
    {
        // checking condition
        // using GetNumericValue() Method
        UnicodeCategory val = Char.GetUnicodeCategory(s, i);

        // Display the values
        Console.WriteLine("the letter present at "+
                      "index {0} is {1} ", i, val);
    }
}

Output:

the letter present at index 3 is DecimalDigitNumber 
the letter present at index 0 is UppercaseLetter 
the letter present at index 2 is LowercaseLetter 

s is null
Exception Thrown: System.ArgumentNullException

例 3: 为argumentout of range exception

// C# program to demonstrate the
// Char.GetUnicodeCategory(String,
// Int32) Method
using System;
using System.Globalization;

class GFG {

    // Main Method
    public static void Main()
    {
        try {

            // calling check() Method
            check("1234", 3);
            check("Tsunami", 0);
            check("psyc0lo", 2);
            Console.WriteLine("");
            Console.WriteLine("index is less than zero");
            check("null", -1);
        }
        catch (ArgumentNullException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
        catch (ArgumentOutOfRangeException e) {

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
    // Defining check() method
    public static void check(string s, int i)
    {
        // checking condition
        // using GetNumericValue() Method
        UnicodeCategory val = Char.GetUnicodeCategory(s, i);

        // Display the values
        Console.WriteLine("the letter present at "+
                      "index {0} is {1} ", i, val);
    }
}

Output:

the letter present at index 3 is DecimalDigitNumber 
the letter present at index 0 is UppercaseLetter 
the letter present at index 2 is LowercaseLetter 

index is less than zero
Exception Thrown: System.ArgumentOutOfRangeException

参考:

https://docs . Microsoft . com/en-us/dotnet/API/system . char . getunicodecategory？view = net framework-4 . 7 . 2 # System _ Char _ GetUnicodeCategory _ System _ String _ System _ int 32 _

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