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System
Object 类
Object 方法
 GetType 方法
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此页面仅适用于
Microsoft Visual Studio 2005/.NET Framework 2.0

同时提供下列产品的其他版本:
.NET Framework 类库
Object.GetType 方法

获取当前实例的 Type

命名空间:System
程序集:mscorlib(在 mscorlib.dll 中)

Visual Basic(声明)
Public Function GetType As Type
Visual Basic(用法)
Dim instance As Object
Dim returnValue As Type

returnValue = instance.GetType
C#
public Type GetType ()
C++
public:
Type^ GetType ()
J#
public Type GetType ()
JScript
public function GetType () : Type

返回值

Type 实例,表示当前实例的确切运行时类型。

对于具有相同运行时类型的两个对象 xyObject.ReferenceEquals(x.GetType(),y.GetType()) 返回 true

Type 对象公开与当前 Object 的类关联的元数据。

下面的代码示例说明 GetType 返回当前实例的运行时类型。

C#
using System;

public class MyBaseClass: Object {
}

public class MyDerivedClass: MyBaseClass {
}

public class Test {

   public static void Main() {
      MyBaseClass myBase = new MyBaseClass();
      MyDerivedClass myDerived = new MyDerivedClass();
      object o = myDerived;
      MyBaseClass b = myDerived;

      Console.WriteLine("mybase: Type is {0}", myBase.GetType());
      Console.WriteLine("myDerived: Type is {0}", myDerived.GetType());
      Console.WriteLine("object o = myDerived: Type is {0}", o.GetType());
      Console.WriteLine("MyBaseClass b = myDerived: Type is {0}", b.GetType());
   }
}


/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/
C++
using namespace System;
public ref class MyBaseClass: public Object{};

public ref class MyDerivedClass: public MyBaseClass{};

int main()
{
   MyBaseClass^ myBase = gcnew MyBaseClass;
   MyDerivedClass^ myDerived = gcnew MyDerivedClass;
   Object^ o = myDerived;
   MyBaseClass^ b = myDerived;
   Console::WriteLine( "mybase: Type is {0}", myBase->GetType() );
   Console::WriteLine( "myDerived: Type is {0}", myDerived->GetType() );
   Console::WriteLine( "object o = myDerived: Type is {0}", o->GetType() );
   Console::WriteLine( "MyBaseClass b = myDerived: Type is {0}", b->GetType() );
}

/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/
J#
import System.*;

public class MyBaseClass extends Object
{
} //MyBaseClass

public class MyDerivedClass extends MyBaseClass
{
} //MyDerivedClass

public class Test
{
    public static void main(String[] args)
    {
        MyBaseClass myBase = new MyBaseClass();
        MyDerivedClass myDerived = new MyDerivedClass();
        Object o = myDerived;
        MyBaseClass b = myDerived;

        Console.WriteLine("mybase: Type is {0}", myBase.GetType());
        Console.WriteLine("myDerived: Type is {0}", myDerived.GetType());
        Console.WriteLine("object o = myDerived: Type is {0}", o.GetType());
        Console.WriteLine("MyBaseClass b = myDerived: Type is {0}", b.GetType());
    } //main
} //Test

/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/
JScript
import System

public class MyBaseClass extends Object {
}

public class MyDerivedClass extends MyBaseClass {
}

public class Test {

   public static function Main() {
      var myBase : MyBaseClass = new MyBaseClass();
      var myDerived : MyDerivedClass = new MyDerivedClass();
      var o = myDerived;
      var b : MyBaseClass = myDerived;

      Console.WriteLine("mybase: Type is {0}", myBase.GetType());
      Console.WriteLine("myDerived: Type is {0}", myDerived.GetType());
      Console.WriteLine("object o = myDerived: Type is {0}", o.GetType());
      Console.WriteLine("MyBaseClass b = myDerived: Type is {0}", b.GetType());
   }
}

Test.Main();

/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/

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.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求

.NET Framework

受以下版本支持:2.0、1.1、1.0

.NET Compact Framework

受以下版本支持:2.0、1.0
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