转载： c#实现动态加载Dll 收藏

  1、利用反射进行动态加载和调用.
 Assembly assembly=Assembly.LoadFrom(DllPath); //利用dll的路径加载,同时将此程序集所依赖的程序集加载进来,需后辍名.dll
Assembly.LoadFile 只加载指定文件，并不会自动加载依赖程序集.Assmbly.Load无需后辍名
 
2、加载dll后,需要使用dll中某类.
Type type=ass.GetType(“TypeName”);//用类型的命名空间和名称获得类型
 
3、需要实例化类型,才可以使用,参数可以人为的指定,也可以无参数,静态实例可以省略
Object obj = Activator.CreateInstance(type,params[]);//利用指定的参数实例话类型
 
4、调用类型中的某个方法:
需要首先得到此方法
MethodInfo mi=type.GetMethod(“MehtodName”);//通过方法名称获得方法
 
5、然后对方法进行调用,多态性利用参数进行控制
mi.Invoke(obj,params[]);//根据参数直线方法,返回值就是原方法的返回值

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#region 声明动态载入DLL的参数  
       object obj=null;  
       byte[] filesByte;  
       Assembly assembly;  
       Type type;  
       MethodInfo timerInitial;  
       MethodInfo timerDispose; 
       #endregion  
 
    private void LoadDll()//加载DLL   
       {  
           try 
           {  
               filesByte = File.ReadAllBytes(Path.GetDirectoryName(Application.ExecutablePath) + "//loadDll.dll");  
               assembly = Assembly.Load(filesByte);  
               type = assembly.GetType("test.loadDll");  
               obj = System.Activator.CreateInstance(type);  
               timerStart = tp.GetMethod("TimerStart");  
               timerStop = tp.GetMethod("TimerStop");  
               if (timerStart != null)  
               {  
                   timerStart.Invoke(obj, null);  
               }  
           }  
           catch(Exception)  
           {  
 
           }  
       } 
 #region 声明动态载入DLL的参数
        object obj=null;
        byte[] filesByte;
        Assembly assembly;
        Type type;
        MethodInfo timerInitial;
        MethodInfo timerDispose;
        #endregion

  private void LoadDll()//加载DLL
        {
            try
            {
                filesByte = File.ReadAllBytes(Path.GetDirectoryName(Application.ExecutablePath) + "//loadDll.dll");
                assembly = Assembly.Load(filesByte);
                type = assembly.GetType("test.loadDll");
                obj = System.Activator.CreateInstance(type);
                timerStart = tp.GetMethod("TimerStart");
                timerStop = tp.GetMethod("TimerStop");
                if (timerStart != null)
                {
                    timerStart.Invoke(obj, null);
                }
            }
            catch(Exception)
            {

            }
        }

以下摘自MSDN

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public class A  
{  
    public virtual int method () {return 0;}  
}  
 
public class B  
{  
    public virtual int method () {return 1;}  
}  
 
class Mymethodinfo  
{  
    public static int Main()  
    {  
        Console.WriteLine ("/nReflection.MethodInfo");  
        A MyA = new A();  
        B MyB = new B();  
 
        // Get the Type and MethodInfo.  
        Type MyTypea = Type.GetType("A");  
        MethodInfo Mymethodinfoa = MyTypea.GetMethod("method");  
 
        Type MyTypeb = Type.GetType("B");  
        MethodInfo Mymethodinfob = MyTypeb.GetMethod("method");  
 
        // Get and display the Invoke method.  
        Console.Write("/nFirst method - " + MyTypea.FullName +  
            " returns " + Mymethodinfoa.Invoke(MyA, null));  
        Console.Write("/nSecond method - " + MyTypeb.FullName +  
            " returns " + Mymethodinfob.Invoke(MyB, null));  
        return 0;  
    }  
} 
public class A
{
    public virtual int method () {return 0;}
}

public class B
{
    public virtual int method () {return 1;}
}

class Mymethodinfo
{
    public static int Main()
    {
        Console.WriteLine ("/nReflection.MethodInfo");
        A MyA = new A();
        B MyB = new B();

        // Get the Type and MethodInfo.
        Type MyTypea = Type.GetType("A");
        MethodInfo Mymethodinfoa = MyTypea.GetMethod("method");

        Type MyTypeb = Type.GetType("B");
        MethodInfo Mymethodinfob = MyTypeb.GetMethod("method");

        // Get and display the Invoke method.
        Console.Write("/nFirst method - " + MyTypea.FullName +
            " returns " + Mymethodinfoa.Invoke(MyA, null));
        Console.Write("/nSecond method - " + MyTypeb.FullName +
            " returns " + Mymethodinfob.Invoke(MyB, null));
        return 0;
    }
}

http://msdn.microsoft.com/en-us/library/a89hcwhh.aspx

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/lanruoshui/archive/2009/12/28/5090710.aspx