命名空間導致NullReferenceException？

Question

我有以下程序，它是一段代碼示例，顯示了C＃反射如何在類上運行。一切正常，沒有問題。

public class Program 
{ 

public static void Main() 
{ 

    Type T = Type.GetType("Customer"); 
    Console.WriteLine("Information about the Type object: "); 
    Console.WriteLine(T.Name); 
    Console.WriteLine(T.FullName); 
    Console.WriteLine(); 

    Console.WriteLine("Property info:"); 
    PropertyInfo[] myPropertyInfoArray = T.GetProperties(); 

    foreach(PropertyInfo myProperty in myPropertyInfoArray) 
    { 
     Console.WriteLine(myProperty.PropertyType.Name); 
    } 
    Console.WriteLine(); 

    Console.WriteLine("Methods in Customer:"); 
    MethodInfo[] myMethodInfoArray = T.GetMethods(); 

    foreach(MethodInfo myMethod in myMethodInfoArray) 
    { 
     Console.WriteLine(myMethod.Name); 
    } 


    Console.ReadKey(); 
} 

} 


class Customer 
{ 

public int ID {get;set;} 
public string Name {get;set;} 

public Customer() 
{ 
    this.ID = -1; 
    this.Name = string.Empty; 
} 

public Customer(int ID, string Name) 
{ 
    this.ID = ID; 
    this.Name = Name; 
} 

public void PrintID() 
{ 
    Console.WriteLine("ID: {0}", this.ID); 
} 

public void PrintName() 
{ 
    Console.WriteLine("Name: {0}", this.Name); 
} 

} 

是我遇到的問題是，當我包裝所有的代碼命名空間中，我suddently獲得Type對象上一個NullReferenceException。爲什麼會這樣呢？

Answer 1

因爲它不再知道客戶在哪裏。您需要

Type T = Type.GetType("NameSpaceName.Customer");