C ++ / CLI在运行时显式加载托管DLL（相当于LoadLibrary for Unmanaged） [英] C++/CLI Explicitly Load Managed DLL at runtime (the equivalent of LoadLibrary for Unmanaged)

问题描述

问题1：

有没有办法在运行时显式加载库，而不是在C ++ / CLI中的编译时。目前我在编译时使用.NET添加参考。
我想显式加载一个托管dll。是否有相当于LoadLibrary的.NET？

Is there a way to explicitly load a library at runtime instead of at compile time in C++/CLI. Currently I am using the .NET "Add Reference" at compile time. I would like to explicitly load a managed dll. Is there the .NET equivalent of LoadLibrary?

更新：感谢Randolpho

Update: Thanks to Randolpho

Assembly :: LoadFrom示例来自 MSDN

Assembly::LoadFrom example from MSDN

Assembly^ SampleAssembly;
SampleAssembly = Assembly::LoadFrom( "c:\\Sample.Assembly.dll" );
// Obtain a reference to a method known to exist in assembly.
MethodInfo^ Method = SampleAssembly->GetTypes()[ 0 ]->GetMethod( "Method1" );
// Obtain a reference to the parameters collection of the MethodInfo instance.
array<ParameterInfo^>^ Params = Method->GetParameters();
// Display information about method parameters.
// Param = sParam1
//   Type = System::String
//   Position = 0
//   Optional=False
for each ( ParameterInfo^ Param in Params )
{
   Console::WriteLine( "Param= {0}", Param->Name );
   Console::WriteLine( "  Type= {0}", Param->ParameterType );
   Console::WriteLine( "  Position= {0}", Param->Position );
   Console::WriteLine( "  Optional= {0}", Param->IsOptional );
}

问题2：

如果Assembly :: LoadFrom是相当于LoadLibrary的.NET。 GetProcAddress是什么等价物？如何为方法创建FunctionPointer？

If Assembly::LoadFrom is the .NET equivalent of LoadLibrary. What is the equivalent of GetProcAddress? How do I create FunctionPointers to the methods?

更新： MethodBase.Invoke from MSDN

Update: MethodBase.Invoke from MSDN

using namespace System;
using namespace System::Reflection;

public ref class MagicClass
{
private:
    int magicBaseValue;

public:
    MagicClass()
    {
        magicBaseValue = 9;
    }

    int ItsMagic(int preMagic)
    {
        return preMagic * magicBaseValue;
    }
};

public ref class TestMethodInfo
{
public:
    static void Main()
    {
        // Get the constructor and create an instance of MagicClass

        Type^ magicType = Type::GetType("MagicClass");
        ConstructorInfo^ magicConstructor = magicType->GetConstructor(Type::EmptyTypes);
        Object^ magicClassObject = magicConstructor->Invoke(gcnew array<Object^>(0));

        // Get the ItsMagic method and invoke with a parameter value of 100

        MethodInfo^ magicMethod = magicType->GetMethod("ItsMagic");
        Object^ magicValue = magicMethod->Invoke(magicClassObject, gcnew array<Object^>(1){100});

        Console::WriteLine("MethodInfo.Invoke() Example\n");
        Console::WriteLine("MagicClass.ItsMagic() returned: {0}", magicValue);
    }
};

int main()
{
    TestMethodInfo::Main();
}

推荐答案

查看 http://www.informit.com/articles/article.aspx?p=25948 了解反射信息。可能是您要找的机票（不知道更多的问题，很难说）

Check out http://www.informit.com/articles/article.aspx?p=25948 for information about Reflection. Might be the ticket you're looking for (without knowing more of the issue, it's hard to say)

它有一个关于动态加载程序集并将其探测到的部分找出方法和属性，而且没有。

It has a whole section about dynamically loading assemblies and probing them to find out methods and properties and whatnot.

这篇关于C ++ / CLI在运行时显式加载托管DLL（相当于LoadLibrary for Unmanaged）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！