作者：XIE绍雄 | 来源：互联网 | 2024-09-30 13:09
C# |类型。GetTypeHandle()方法
原文:https://www . geesforgeks . org/c-sharp-type-gettypehandle-method/
类型。GetTypeHandle()方法用于获取指定对象类型的句柄。
语法:公共静态 RuntimeTypeHandle GetTypeHandle(对象 o)；
在这里，它需要为其获取类型句柄的对象。
返回值:该方法返回指定对象类型的句柄。
异常:如果 o 为空，这个方法抛出 ArgumentNullException 。
以下程序说明了类型的使用。GetTypeHandle() 方法:
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);
}
}
}
输出:
Type referenced is System.RuntimeTypeHandle
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);
}
}
}
输出:
object is null.
Exception Thrown: System.ArgumentNullException
参考:
- https://docs . Microsoft . com/en-us/dotnet/API/system . type . gettypehandle？视图=netframework-4.8
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