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C# Uri.FromHex()用法及代碼示例


Uri.FromHex(Char)方法用於獲取十六進製數字的十進製值。

用法： public static int FromHex (char digit);

Here, it takes the hexadecimal digit (0-9, a-f, A-F) to convert.

返回值：此方法返回一個Int32值，該值包含一個從0到15的數字，該數字對應於指定的十六進製數字。


異常：如果該數字不是有效的十六進製數字(0-9，a-f，A-F)，則此方法將引發ArgumentException。

以下示例程序旨在說明Uri.FromHex(Char)方法的用法：

示例1:

// C# program to demonstrate the 
// Uri.FromHex(Char) Method 
using System; 
using System.Globalization; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        // Declaring and initializing Char value 
        char value = 'A'; 
  
        // Gets the decimal value  
        // of a hexadecimal digit. 
        // using FromHex() method 
        int dec = Uri.FromHex(value); 
  
        // Displaying the result 
        Console.WriteLine("Converted int value : {0}", dec); 
    } 
}
輸出： 
Converted int value : 10

示例2:對於ArgumentException

// C# program to demonstrate the 
// Uri.FromHex(Char) Method 
using System; 
using System.Globalization; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        try { 
  
            // Declaring and initializing 
            // Char value 
            char value = '.'; 
  
            // Gets the decimal value  
            // of a hexadecimal digit. 
            // using FromHex() method 
            int dec = Uri.FromHex(value); 
  
            // Displaying the result 
            Console.WriteLine("Converted int value : {0}", dec); 
        } 
  
        catch (ArgumentException e)  
        { 
            Console.WriteLine("Digit should be a valid "+ 
                   "Hexadecimal digit (0-9, a-f, A-F)."); 
            Console.Write("Exception Thrown: "); 
            Console.Write("{0}", e.GetType(), e.Message); 
        } 
    } 
}
輸出： 
Digit should be a valid Hexadecimal digit (0-9, a-f, A-F).
Exception Thrown: System.ArgumentException

參考：



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注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 C# | Uri.FromHex() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。