C# 命名空间导致NullReferenceException?
我有以下程序,这是一段示例代码,显示了C#reflection如何对类进行操作。一切正常,一点问题也没有C# 命名空间导致NullReferenceException?,c#,oop,exception,namespaces,C#,Oop,Exception,Namespaces,我有以下程序,这是一段示例代码,显示了C#reflection如何对类进行操作。一切正常,一点问题也没有 public class Program { public static void Main() { Type T = Type.GetType("Customer"); Console.WriteLine("Information about the Type object: "); Console.WriteLine(T.Name); Console.
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);
}
}
我遇到的问题是,当我将所有代码包装到一个名称空间中时,我突然在类型对象上得到一个NullReferenceException。为什么会这样?因为它不再知道客户在哪里。你需要
Type T = Type.GetType("NameSpaceName.Customer");
因为它不再知道客户在哪里。你需要
Type T = Type.GetType("NameSpaceName.Customer");
具体在哪一行?您的名称空间名称是什么?具体在哪一行?您的命名空间名称是什么?对,因为GetType不知道有关命名空间的任何信息。对,因为GetType不知道有关命名空间的任何信息