I try to load a assembly into my source code in C#. So i first compile the source file:
private bool testAssemblies(String sourceName)
{
FileInfo sourceFile = new FileInfo(sourceName);
CodeDomProvider provider = null;
bool compileOk = false;
// Select the code provider based on the input file extension.
if (sourceFile.Extension.ToUpper(CultureInfo.InvariantCulture) == ".CS")
{
provider = CodeDomProvider.CreateProvider("CSharp");
}
else if (sourceFile.Extension.ToUpper(CultureInfo.InvariantCulture) == ".VB")
{
provider = CodeDomProvider.CreateProvider("VisualBasic");
}
else
{
Console.WriteLine("Source file must have a .cs or .vb extension");
}
if (provider != null)
{
// Format the executable file name.
// Build the output assembly path using the current directory
// and <source>_cs.exe or <source>_vb.exe.
String exeName = String.Format(@"{0}\{1}.exe",
System.Environment.CurrentDirectory,
sourceFile.Name.Replace(".", "_"));
CompilerParameters cp = new CompilerParameters();
// Generate an executable instead of
// a class library.
cp.GenerateExecutable = true;
// Specify the assembly file name to generate.
cp.OutputAssembly = exeName;
// Save the assembly as a physical file.
cp.GenerateInMemory = false;
// Set whether to treat all warnings as errors.
cp.TreatWarningsAsErrors = false;
// Invoke compilation of the source file.
CompilerResults cr = provider.CompileAssemblyFromFile(cp,
sourceName);
if (cr.Errors.Count > 0)
{
// Display compilation errors.
Console.WriteLine("Errors building {0} into {1}",
sourceName, cr.PathToAssembly);
foreach (CompilerError ce in cr.Errors)
{
Console.WriteLine(" {0}", ce.ToString());
Console.WriteLine();
}
}
else
{
// Display a successful compilation message.
Console.WriteLine("Source {0} built into {1} successfully.",
sourceName, cr.PathToAssembly);
}
// Return the results of the compilation.
if (cr.Errors.Count > 0)
{
compileOk = false;
}
else
{
compileOk = true;
}
}
return compileOk;
}
This works well, but if I later try to load the assembly, I always get an exception:
System.Reflection.TargetInvocationException was unhandled
Message=Exception has been thrown by the target of an invocation.
Source=mscorlib
StackTrace:
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at Microsoft.Surface.Shell.ApiEventManager.EventSubscriberInfo.InvokeCallback(Object arg)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.Run()
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at Prototype_Ver1.App.Main() in C:\Users\Roflcoptr\Documents\Visual Studio 2008\Projects\Prototype_Ver1\Prototype_Ver1\obj\Debug\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.IO.FileLoadException
Message=Could not load file or assembly 'C:\\Users\\Roflcoptr\\Desktop\\hello.cs' or one of its dependencies. The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)
Source=mscorlib
FileName=C:\\Users\\Roflcoptr\\Desktop\\hello.cs
FusionLog=""
StackTrace:
at System.Reflection.AssemblyName.nInit(Assembly& assembly, Boolean forIntrospection, Boolean raiseResolveEvent)
at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
at System.Reflection.Assembly.Load(String assemblyString)
at Prototype_Ver1.SurfaceWindow1.OnApplicationActivated(Object sender, EventArgs e) in C:\Users\Roflcoptr\Documents\Visual Studio 2008\Projects\Prototype_Ver1\Prototype_Ver1\MainWindow.xaml.cs:line 91
InnerException:
My loading Method looks like this:
if (testAssemblies("C:\\Users\\Roflcoptr\\Desktop\\hello.cs"))
{
Assembly a = Assembly.Load("C:\\Users\\Roflcoptr\\Documents\\Visual Studio 2008\\Projects\\Prototype_Ver1\\Prototype_Ver1\\bin\\Debug\\hello_cs.exe");
}
Any ideas why it doesnt work?
I think your syntax is wrong. Assembly.load(string) expects the assembly name
Assembly.Load("SampleAssembly, Version=1.0.2004.0, Culture=neutral, PublicKeyToken=8744b20f8da049e3");
Also make sure you're using the right overload for your needs (which usually is indeed Assembly.Load) http://blogs.msdn.com/b/suzcook/archive/2003/05/29/57143.aspx
EDIT use this:
AssemblyName an = AssemblyName.GetAssemblyName(filePath);
Assembly.Load(an);
来源：https://stackoverflow.com/questions/4058617/load-assembly-doesnt-worked-correctly