Activator.CreateInstance 方法 (Type) 的用法
Activator.CreateInstance 方法 (Type)
使用与指定参数匹配程度最高的构造函数来创建指定类型的实例。
命名空间:System
程序集:mscorlib(在 mscorlib.dll 中)
C#
public static Object CreateInstance (Type type)
public static Object CreateInstance (Type type)
Activator.CreateInstance 泛型方法 ()
注意:此方法在 .NET Framework 2.0 版中是新增的。
创建类型的一个实例,该类型由指定的泛型类型参数指定。
命名空间:System
程序集:mscorlib(在 mscorlib.dll 中)
C#
public static T CreateInstance<T> ()
Activator.CreateInstance public static T CreateInstance<T> ()
(Type)实例
输入一个类的名称为参数,返回一个相应的类的实例。
这在工厂模式中是非常有用的,这样,可以使程序有更高的扩展性
/*
* Created by SharpDevelop.
* User: 19004991
* Date: 2009-8-6
* Time: 9:10
*/
using System;
namespace ActivatorCreateInstance
{
public interface IObject
{
void printName();
}
public class ClassExam : IObject
{
private string name="default name";
public ClassExam()
{
}
public ClassExam(string name)
{
this.name = name;
}
public void printName()
{
Console .WriteLine (this.name );
}
}
public class Program
{
public Program()
{
}
public static void Main(string[] args)
{
// TODO: Implement Functionality Here
IObject obj1=(IObject)Activator.CreateInstance(System.Type.GetType ("ActivatorCreateInstance.ClassExam"));
obj1.printName();
IObject obj2=(IObject)Activator.CreateInstance(System.Type.GetType("ActivatorCreateInstance.ClassExam"),new string[]{"seted new name"});
obj2.printName();
Console.Write("Press any key to continue . . . ");
Console.ReadKey(true);
}
}
}
* Created by SharpDevelop.
* User: 19004991
* Date: 2009-8-6
* Time: 9:10
*/
using System;
namespace ActivatorCreateInstance
{
public interface IObject
{
void printName();
}
public class ClassExam : IObject
{
private string name="default name";
public ClassExam()
{
}
public ClassExam(string name)
{
this.name = name;
}
public void printName()
{
Console .WriteLine (this.name );
}
}
public class Program
{
public Program()
{
}
public static void Main(string[] args)
{
// TODO: Implement Functionality Here
IObject obj1=(IObject)Activator.CreateInstance(System.Type.GetType ("ActivatorCreateInstance.ClassExam"));
obj1.printName();
IObject obj2=(IObject)Activator.CreateInstance(System.Type.GetType("ActivatorCreateInstance.ClassExam"),new string[]{"seted new name"});
obj2.printName();
Console.Write("Press any key to continue . . . ");
Console.ReadKey(true);
}
}
}
网上代码System.Type.GetType内为"ActivatorCreateInstance.ClassExam,ActivatorExample"编译失败