I'm having some problems calling a C function from a DLL, and was hoping someone could help me out. The function is returning -101 which translates as a "bad parameter". The values I am passing have been returned from another, successful function call, so my current assumption is that I've built the structure incorrectly. Any help is ...
I'm creating a web service in Java that will be consumed by an external application, probably written in C#. In my Purchase bean, I have a Currency object for the total cost. However, this leads to the following error: Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions java.util...
I have a native C++ application that, for the time being simply needs to send its command line string and current mouse cursor coordinates to a WPF application. The message is sent and received just fine, but I cannot convert the IntPtr instance in C# to a struct. When I try to do so, the application will either crash without exception ...
This is what I tried f = 1.2 f = Marshal.dump(f) #\004\bf\v1.2\00033 after that I tried to save this f into text column and this is an error I got. ActiveRecord::StatementInvalid: SQLException: unrecognized token: "fϾ1.2 33" (Ͼ is male symbol, but I can't find one). ...
Hi there! I'm writing a program to do some image processing on the GPU. For this I'm using CUDA.Net, but unfortunaly the CUDA doesn't recognize the type byte, in which I was able to store the pixels information using this code: BitmapData bData = bmp.LockBits(new Rectangle(new Point(), bmp.Size), ImageLo...
I have the following .NET value types: [StructLayout(LayoutKind.Sequential)] public struct Date { public UInt16 V; } [StructLayout(LayoutKind.Sequential)] public struct StringPair { public String A; public String B; public String C; public Date D; public double V; } I have code that is passing a pointer to a v...
My application requires to keep large data objects in session. There are like 3-4 data objects each created by parsing a csv containing 150 X 20 cells having strings of 3-4 characters. My application shows this error- "marshal data too short". I tried this- Deleting the old session table. Deleting the old migration for session table. ...
How to convert this code: MYCLASS ebt = new MYCLASS(); ebt.cbStruct = Marshal.SizeOf(ebt); into this: MYCLASS ebt = new MYCLASS(cbStruct = Marshal.SizeOf('What comes here?')); ...
Sorry for the verbose introduction that follows. I need insight from someone knowing P/Invoke internals better than I do. Here is how I'm marshalling structures containing function pointers from C to C#. I would like to know whether it's the cleanest and/or most efficient way of doing it. I'm interfacing with a native DLL coded in C th...
I am trying to determine if the COM interop is becoming a bottle neck in my software. This article on MSDN helps http://msdn.microsoft.com/en-us/library/ms998579.aspx#scalenetchapt15%5Ftopic11. But I really do not have have a point of reference for a "normal" or "high" value for # of marshalling to determine if it is impacting performanc...
>>> idmapfile = open("idmap", mode="w") >>> pickle.dump(idMap, idmapfile) >>> idmapfile.close() >>> idmapfile = open("idmap") >>> unpickled = pickle.load(idmapfile) >>> unpickled == idMap False idMap[1] {1537: (552, 1, 1537, 17.793827056884766, 3), 1540: (4220, 1, 1540, 19.31205940246582, 3), 1544: (592, 1, 1544, ...
I am calling a DLL using PInvoke. The DLL's function returns a C string in codepage 437. Is there a way to have the .Net marshaling convert the string to unicode, or could someone suggest which parameters I should give to DllImport() and MarshalAs() and a conversion function to use in order to get an output in unicode? For reference, t...
I have a C++ struct that looks like this: struct unmanagedstruct { int flags; union { int offset[6]; struct { float pos[3]; float q[4]; } posedesc; } u; }; And I'm trying to Marshal it like so in C#: [StructLayout(Layou...
I've got a few classes that implement Parcelable and some of these classes contain each other as properties. I'm marshalling the classes into a Parcel to pass them between activities. Marshalling them TO the Parcel works fine, but when I try to unmarshall them I get the following error: ... AndroidRuntime E Caused by: android.os.BadPa...
Hi, I'm using Marshal.Copy() to copy the pixel information from a Bitmap to an int[] array, the problem resides in the fact that the information that is coming to this array is coming all wrong, like: [0] = -8682109; [1] = -8682109; [2] = -8616573; [3] = -8616573; [4...
I posted a question not to long ago about how my program was essentially leaking memory: see here. I have now tracked it specifically to some code in which I copy the raw bytes of a Bitmap object into a managed array. The relevant code: public class FastBitmap { ... private byte[] rgbValues; private int height; private i...
I'm trying to subclass an unmanaged statusbar window from my managed COM server using a class inherited from NativeWindow, and am running into a wall trying to make sense of how to properly marshal the contents of an lParam. http://msdn.microsoft.com/en-us/library/bb760757%28VS.85%29.aspx says that the contents of this lParam is of type...
I'm working with an unmanaged library through P/Invoke and it uses three structs (although they all have the same basic layout, so I'll only post one): struct Agraph_t { int tag:4; int kind:4; int handle:24; char **attr; char *didset; char *name; Agdata_t *univ; Dict_t *nodes, *inedges, *outedges; Agr...
Hello Folks, json support is one of the new features of delphi 2009 and delphi 2010. I want to know if it's there any simple function to marshalling/unmarshalling directly between string and object like in superobject library. Example: MyKnownObject := FromJSON('{name:"francis", surname:"lee"}'); ...
I have some data in a stream which is actually in the format of uint. System.IO.Stream only allows me to read the content out to a byte array, but I don't want to read the bytes and then convert them into a uint array with 1/4 the length of the byte array. I want to read it directly into the memory of the uint array so that it saves time...