C#中的Type

简介: Type 类表示类型声明:类类型、接口类型、数组类型、值类型、枚举类型、类型参数、泛型类型定义,以及开放或封闭构造的泛型类型。

Type 类

表示类型声明:类类型、接口类型、数组类型、值类型、枚举类型、类型参数、泛型类型定义,以及开放或封闭构造的泛型类型。

Type 初始化 Type 类的新实例

C#中通过 Type类可以访问任意数据类型信息。
1.获取给定类型的Type引用有3种方式:
   a.使用typeof运算符,如Type t = typeof(int);
   b.使用GetType()方法,如int i;Type t = i.GetType();
   c.使用 Type类的静态方法GetType(),如Type t =Type.GetType("System.Double");
2.Type的属性:
   Name:数据类型名;
   FullName:数据类型的完全限定名,包括命名空间;
   Namespace:数据类型的命名空间;
   BaseType:直接基本类型;
   UnderlyingSystemType:映射类型;
3.Type的方法:
   GetMethod():返回一个方法的信息;
   GetMethods():返回所有方法的信息。

using System;
using System.Reflection;

namespace Magci.Test.Reflection
{
     public class TestType
     {
         public static void Main()
         {
             //基本数据类型
             Type intType = typeof(int);
            
             //属性
             Console.WriteLine("intType.Name = " + intType.Name);
             Console.WriteLine("intType.FullName = " + intType.FullName);
             Console.WriteLine("intType.Namespace = " + intType.Namespace);
             Console.WriteLine("intType.IsAbstract = " + intType.IsAbstract);
             Console.WriteLine("intType.IsClass = " + intType.IsClass);
             Console.WriteLine("intType.IsEnum = " + intType.IsEnum);
             Console.WriteLine("intType.IsPrimitive = " + intType.IsPrimitive);
             Console.WriteLine("intType.IsValueType = " + intType.IsValueType);

             //方法
             MethodInfo[] methods = intType.GetMethods();
             foreach (MethodInfo method in methods)
             {
                 Console.WriteLine(method.DeclaringType + " " + method.MemberType + " " + method.Name);
             }
         }
     }
}

using System;
using System.Text;
using System.Windows.Forms;
using System.Reflection;

namespace Magci.Test.Reflection
{
     public class TestTypeView
     {
         public static StringBuilder OutputText = new StringBuilder();

         public static void Main()
         {
             Type t = typeof(double);
             AnalyzeType(t);
             MessageBox.Show(OutputText.ToString());
         }

         public static void AnalyzeType(Type t)
         {
             //数据类型名
             OutputText.Append("/nType Name: " + t.Name);
             //数据类型的完全限定名,包括命名空间
             OutputText.Append("/nFull Name: " + t.FullName);
             //数据类型的命名空间
             OutputText.Append("/nNamespace: " + t.Namespace);
            
             //直接基本类型
             Type tBase = t.BaseType;
             if (tBase != null)
             {
                 OutputText.Append("/nBase Type: " + tBase.Name);
             }
            
             //映射类型
             Type tUnderlyingSystem = t.UnderlyingSystemType;
             if (tUnderlyingSystem != null)
             {
                 OutputText.Append("/nUnderlyingSystem Type: " + tUnderlyingSystem.Name);
             }

             //所有公共方法
             OutputText.Append("/n/nPublic members:");
             MemberInfo[] methods = t.GetMethods();
             foreach (MemberInfo method in methods)
             {
                 OutputText.Append("/n" + method.DeclaringType + " " + method.MemberType + "" + method.Name);
             }
         }
     }
}


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