marshalling

问题 I want to read a native struct into a C# type using Marshalling. My method to Marshal structs is like so: T ReadObject<T>(BinaryReader br) { var bytes = br.ReadBytes(Marshal.SizeOf(typeof(T))); var handle = GCHandle.Alloc(bytes, GCHandleType.Pinned); try { return (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T)); } finally { handle.Free(); } } Now this works fine in general, the problem arises with the following type: [StructLayout(LayoutKind.Sequential, Pack=1)] class SubData

问题 I'm trying to write a Notification object to a File. The best way I could find was to write the object to a parcel, marshall that parcel to get a byte[] and then write it to a file. Parcel notif = Parcel.obtain(); notification.writeToParcel(notif, 0); byte[] notifArray = notif.marshall(); I get a Runtime exception when I try to marshall the parcel though: "Tried to marshall a Parcel that contained Binder objects." Is there a better way of writing Notification objects to file? Else, how do I

问题 I've written this little C# test DLL using UnmanagedExports (obtained as a NuGet package), which is working fine. However, I'm wondering if, and if so how, it's possible to immediately return a String() array instead of returning a string which has to be Split() in a VBA wrapper function. That is to say, the point of interest is the method GetFilesWithExtension(). The other methods in the dll are just small tests I made while figuring out how to pass strings with the correct encoding. The DLL

问题 I've written this little C# test DLL using UnmanagedExports (obtained as a NuGet package), which is working fine. However, I'm wondering if, and if so how, it's possible to immediately return a String() array instead of returning a string which has to be Split() in a VBA wrapper function. That is to say, the point of interest is the method GetFilesWithExtension(). The other methods in the dll are just small tests I made while figuring out how to pass strings with the correct encoding. The DLL

问题 I am wondering about Marshal.GetFunctionPointerForDelegate. Namely I want to know how it converts a delegate to a function that is non static into a function pointer. Does it dynamically generate a code stub that has the instance attached somehow? And if so, doesn't this leak memory? Perhaps the delegate frees it in its finalizer? It doesn't look like System.Delegate has a finalizer, so I am very interested in how this mechanism works. I would assume that it would take 4 bytes for the

问题 Say, I've got that prototype of a function that is exposed on a DLL: int CALLBACK worker (char* a_inBuf, int a_InLen, char** a_pOutBuf, int* a_pOutLen, char** a_pErrBuf, int* a_pErrLen) I'm sure that it's ridiculously easy to call that DLL function from my C# code but it doesn't work with this code: [DllImport("mydll.dll")] public static extern int worker( [In, MarshalAs(UnmanagedType.LPArray)] byte[] inBuf, int inputLen, [Out, MarshalAs(UnmanagedType.LPArray)] byte[] outBuf, out int

问题 Their Seems to be a problem when i attempt to run JAXB marshaller in a netbeans module. Originally I thought it was the node implimentation so i spent a couple of days reorganizing everything however I was still recieveing the odd error message javax.xml.bind.JAXBException: ClassCastException: attempting to cast jar:file:/C:/Program%20Files/jmonkeyplatform/ide/modules/ext/jaxb/api/jaxb-api.jar!/javax/xml/bind/JAXBContext.class to jar:file:/C:/Program%20Files/Java/jdk1.6.0_21/jre/lib/rt.jar!

问题 I am trying to Marshall c call backs that are in a struct. I am pretty sure I have everything correct, but when using my C# example I don't get events, when using c++ I do get events. Here is the C# class Program { [DllImport("Some.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)] public static extern int SetCallbacks(Callbacks callBack); static Callbacks Callback = new Callbacks { DataArrived = DataArrived, SendFailure = SendFailure }; static void Main(string[] args

问题 What I'm trying to do is to be able to intercept calls to an object's methods and properties for cross-cutting concerns. I'm using proxy-based AOP using ContextBoundObject . However this doesn't work for recursive method calls, The first call against the target will be intercepted by the proxy and successfully invoked, allowing me to do cross-cut here. However subsequent method calls from within the first method will stay within the target class and are not intercepted by the proxy as if no

问题 I am trying to get ANGLE working in C# using P/Invoke. Basically, I am creating a simple 2D surface, and then passing that off to skia (using SkiaSharp). Everything is working and all that, but I am having a problem marshalling PropertySet to the unmanaged code. This bit works fine: // the properties var props = new PropertySet(); props.Add("EGLNativeWindowTypeProperty", swapChainPanel); // the surface attributes int[] surfaceAttrs = { EGL_ANGLE_SURFACE_RENDER_TO_BACK_BUFFER, EGL_TRUE, EGL