C# Type.GetTypeHandle()用法及代碼示例

Type.GetTypeHandle()方法用於獲取指定對象的Type的句柄。

用法： public static RuntimeTypeHandle GetTypeHandle (object o);

Here, it takes the object for which to get the type handle.

返回值：此方法返回指定對象的Type的句柄。

異常：如果o為null，則此方法引發ArgumentNullException。

以下示例程序旨在說明Type.GetTypeHandle()方法的使用：

示例1:

// C# program to demonstrate the 
// Type.GetTypeHandle() Method 
using System; 
using System.Globalization; 
using System.Reflection; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // try-catch block for handling Exception 
        try { 
  
            // creating and initializing object Type 
            Type type = typeof(int); 
  
            // getting handle of given type 
            // by using GetTypeHandle() Method 
            RuntimeTypeHandle handle = Type.GetTypeHandle(type); 
  
            // Display the Result 
            Console.WriteLine("Type referenced is {0}", handle); 
        } 
  
        // catch ArgumentNullException here 
        catch (ArgumentNullException e)  
        { 
            Console.WriteLine("object is null."); 
            Console.Write("Exception Thrown: "); 
            Console.Write("{0}", e.GetType(), e.Message); 
        } 
    } 
}

輸出：

Type referenced is System.RuntimeTypeHandle

示例2:

// C# program to demonstrate the 
// Type.GetTypeHandle() Method 
using System; 
using System.Globalization; 
using System.Reflection; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // try-catch block for handling Exception 
        try { 
  
            // creating and initializing object Type 
            Type type = typeof(int); 
  
            // getting handle of given type 
            // by using GetTypeHandle() Method 
            RuntimeTypeHandle handle = Type.GetTypeHandle(null); 
  
            // Display the Result 
            Console.WriteLine("Type referenced is {0}", handle); 
        } 
  
        // catch ArgumentNullException here 
        catch (ArgumentNullException e) 
        { 
            Console.WriteLine("object is null."); 
            Console.Write("Exception Thrown: "); 
            Console.Write("{0}", e.GetType(), e.Message); 
        } 
    } 
}

輸出：

object is null.
Exception Thrown: System.ArgumentNullException

參考：

https://docs.microsoft.com/en-us/dotnet/api/system.type.gettypehandle?view=netframework-4.8

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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# | Type.GetTypeHandle() 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。