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C# DLL动态调用
yo · 2009-03-13 · via 博客园 - yo

由于项目需要,不能使用VS自身的添加引用功能,开始想通过反射来调用DLL,虽然实现了应用程序与DLL间的调用,但对于DLL间的调用还是无法实现(不知哪位大侠能否指点一下),后来想利用GAC,但还是无法实现DLL间的调用,最后尝试了动态调用,目前基本能够实现DLL间的相互调用,但不知道是否会有冲突出现,哪位大侠也给指点一下。以下是部分代码:

1.     在原来项目中添加动态调用DLL的类,如InvokeDLL.cs

class InvokeDLL

    {

        public object GetDLL(string spaceName, string className, string methodName,object[] args)

        {

            string path = ConfigurationSettings.AppSettings["DALPath"].ToString();

            Assembly assembly = Assembly.LoadFrom(path);

            Type t = assembly.GetType(spaceName + "." + className);

            Object obj = t.InvokeMember( null,

                   BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.CreateInstance,

                   null, null, null);

            Object varReturn = t.InvokeMember(methodName,

                                           BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.InvokeMethod,

                                           null, obj, args);

            return varReturn;

        }

    }

2.     在需要调用该DLL的类中调用该方法,并把参数传过来。例如

public DataSet getList(string Customer_id, string Customer_Name, string contactman, string tel, string addr, int flag)

        {

InvokeDLL invokeDll = new InvokeDLL();

            DataSet ds = new DataSet();

                object[] obj = new object[] { Customer_id, Customer_Name, contactman, tel, addr, flag };

                ds = (DataSet)invokeDll.GetDLL("DAL","DAL","getList",obj);

            return ds;

        }

这样就实现了DLL的动态调用。