C＃ - 没有引用它执行从.NET的DLL（类库）代码？(C# - Execute code fro

我试图在其中找到我可以从一个.NET的DLL我的应用程序已经启动后执行代码的方式。我已经包括下面一些伪代码可能会试着解释什么，我试图做的。我知道这可能是一个复杂多了，比我使它看起来。

ClassLibrary myLibrary = new ClassLibrary("C:\\Users\\Admin\\Desktop\\myTestLibrary.dll");
myLibrary.executeMethod("showMessageMethod", arg1, arg2, arg3...);

这就是我想做的事情，虽然我知道这是很可能比复杂得多！

我还想说清楚，我不明白，你注定要引用库在您的项目等等......但我的项目要求我不要做这种方式。

提前致谢！

Answer 1:

你需要从磁盘加载组件，如下所示：

Assembly myLibrary = System.Reflection.Assembly
    .LoadFile("C:\\Users\\Admin\\Desktop\\myTestLibrary.dll");

之后，你将需要使用反射来得到正确的类型，并调用适当的方法。这将是最方便的，当你想调用类实现了在在启动过程中引用的程序集中定义的接口：

Type myClass = (
    from type in myLibrary.GetExportedTypes()
    where typeof(IMyInterface).IsAssignableFrom(type)
    select type)
    .Single();

var instance = (IMyInterface)Activator.CreateInstance(myClass);

instance.executeMethod("showMessageMethod", arg1, arg2, arg3...);

Answer 2:

我希望下面的代码示例帮助。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;

namespace zielonka.co.uk.stackoverflow.examples.Reflection
{
    class Program
    {
        static void Main(string[] args)
        {

            // dynamically load assembly from file Test.dll
            Assembly testAssembly = Assembly.LoadFile(@"c:\Test.dll");


            // get type of class Calculator from just loaded assembly
            Type calcType = testAssembly.GetType("Test.Calculator");


            // create instance of class Calculator
            object calcInstance = Activator.CreateInstance(calcType);

            // get info about property: public double Number
            PropertyInfo numberPropertyInfo = calcType.GetProperty("Number");

            // get value of property: public double Number
            double value = (double)numberPropertyInfo.GetValue(calcInstance, null);

            // set value of property: public double Number
            numberPropertyInfo.SetValue(calcInstance, 10.0, null);

            // get info about static property: public static double Pi
            PropertyInfo piPropertyInfo = calcType.GetProperty("Pi");

            // get value of static property: public static double Pi
            double piValue = (double)piPropertyInfo.GetValue(null, null);

            // invoke public instance method: public void Clear()
            calcType.InvokeMember("Clear",
                BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Public,
                null, calcInstance, null);

            // invoke private instance method: private void DoClear()
            calcType.InvokeMember("DoClear",
                BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.NonPublic,
                null, calcInstance, null);

            // invoke public instance method: public double Add(double number)
            double value = (double)calcType.InvokeMember("Add",
                BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Public,
                null, calcInstance, new object[] { 20.0 });

            // invoke public static method: public static double GetPi()
            double piValue = (double)calcType.InvokeMember("GetPi",
                BindingFlags.InvokeMethod | BindingFlags.Static | BindingFlags.Public,
                null, null, null);


            // get value of private field: private double _number
            double value = (double)calcType.InvokeMember("_number",
                BindingFlags.GetField | BindingFlags.Instance | BindingFlags.NonPublic,
                null, calcInstance, null);

        }
    }
}