我正在尝试用参数在我的C#代码中调用matlab方法。我使用反射在运行时将一个带有matlab函数的dll加载到我的应用程序中,它工作得很好:
Assembly matlabAssembly = Assembly.LoadFrom(info.FullName);
List<Type> types = new List<Type>();
types = matlabAssembly.GetTypes().ToList();
List<MethodInfo> methods = new List<MethodInfo>();
methods.AddRange(types[0].GetMethods());
dynamic dynamicObject = Activator.CreateInstance(types[0]);dll包含具有一个函数的一种类型:
MWArray MyMatlabFunction(MWArray, MWArray, MWArray, MWArray);我创建了一些数组,并希望将它们作为参数传递给此函数。为了使C#在编译时可以使用MWArray类型,我静态地将C#运行时中的程序集"MWArray.dll“添加到我的项目中。
MWArray array1 = new MWNumericArray(120);
MWArray array2 = new MWNumericArray(100);
MWArray array3 = new MWNumericArray(15);
MWArray array4 = new MWLogicalArray(true);
object[] params = new object[] {array1, array2, array3, array4};
MethodInfo matlabFuncion = methods[5]; //MyMatlabFunction
matlabFunction.Invoke(dynamicObject, params);当我调用invoke方法时,我得到一个异常,MWNummericArray不能转换为MWArray,尽管MWNummericArray直接从MWArray派生。是我漏掉了什么,还是我做错了什么?
发布于 2019-10-23 17:32:15
如果有人遇到同样的问题,这里是我找到的解决方案:
当您想要在C#应用程序中运行Matlab代码时,您需要从Matlab运行时引用"MWArray.dll“。但是,如果您将对此dll的引用静态地添加到您的项目中,它将无法工作,因为不知何故无法加载该引用。
解决方案是使用反射加载对"MWArray“的引用,并动态创建对"MWArray”的实例。
public void Foo()
{
AppDomain currentDomain = AppDomain.CurrentDomain;
currentDomain.AssemblyResolve += new ResolveEventHandler(MyResolveEventHandler);
// Load dll which was exported from Matlab into application
string path = @"..\..\..\..\MatlabDlls\Matlab-Integration";
string dllName = "MyExportedMatlabDLL.dll";
List<string> dllPaths = Directory.GetFiles(path).Where(file => file.EndsWith(dllName)).ToList();
FileInfo info = new FileInfo(dllPaths[0]);
Assembly matlabAssembly = Assembly.LoadFrom(info.FullName);
// Get types from exported dll
List<Type> exportedMatlabTypes = new List<Type>();
exportedMatlabTypes = matlabAssembly.GetTypes().ToList();
List<MethodInfo> methods = new List<MethodInfo>();
methods.AddRange(exportedMatlabTypes[0].GetMethods());
// Create instance of exported Matlabtype
dynamic dynamicObject = Activator.CreateInstance(exportedMatlabTypes[0]);
// Select MWArray from loaded Assemblies
// Important: MWArray could only be loaded into the application with
// the ResolveEventHandler further below
Assembly mwArrayAssembly = AppDomain.CurrentDomain.GetAssemblies().Where(name => name.FullName.Contains("MWArray")).ToList()[0];
// Get all available types of MWArray
List<Type> MWArrayTypes = mwArrayAssembly.GetTypes().ToList();
// Create some MWArrays
// MWNummericArray
dynamic array1 = Activator.CreateInstance(MWArrayTypes[9], new object[] { new byte[640 * 480]});
//MWNummericArray
dynamic array2 = Activator.CreateInstance(MWArrayTypes[9], new object[] { 100 });
//MWLogicalArray
dynamic array3 = Activator.CreateInstance(MWArrayTypes[5], new object[] { true });
// Parameters for Matlab function
object[] params= new object[] { array1, array2, array3};
MethodInfo matlabFuncion = methods[5];
var result = matlabFuncion.Invoke(dynamicObject, params);
}
// The ResolveEventHandler ensures the proper loading of dependent assemblies
// I wrote a crawler that would search inside the Matlab runtime for dependent
// assemblies. It is enough to just load "MWArray" from a static path...
private Assembly MyResolveEventHandler(object sender, ResolveEventArgs args)
{
Assembly dependentAssembly = null;
string assemblyName = args.Name.Split(',')[0];
string assemblypath = _crawler.getFullName(_runtimepath, assemblyName);
if (assemblypath != string.Empty)
dependentAssembly = Assembly.LoadFile(assemblypath);
return dependentAssembly;
}https://stackoverflow.com/questions/58489646
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