Only happens when the code is called from .NET. When the same code is compiled as a C++ console app, or called from a C++ console app, it runs without errors. The following code compiles a C++ DLL called from .NET, and it prints “mq_open failed, code 1, message Operation not permitted”: extern "C" __attribute__((visibility("default"))) ..
Category : .net-5
I used to use PInvoke: [DllImport("Kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] private extern static bool GetVolumeInformation( string rootPathName, StringBuilder volumeNameBuffer, int volumeNameSize, out uint volumeSerialNumber, out uint maximumComponentLength, out FileSystemFeature fileSystemFlags, StringBuilder fileSystemNameBuffer, int nFileSystemNameSize); public static VolumeInformation GetVolumeInfo(string path) { string root = System.IO.Path.GetPathRoot(path); const int maxPath = 261; StringBuilder volumeNameBuffer ..
I have a solution of .NET 5 SDK-style csprojs that works with dotnet build and dotnet test. I’d like to add a C++ project to it (pure C++, not C++/CLI), which breaks these. The error I get is error MSB4019: The imported project "C:Microsoft.Cpp.Default.props" was not found. Confirm that the expression in the Import declaration ..
In the past I used the classes Installer, ServiceInstaller and ServiceProcessInstaller to make my app self-installable. I just had to run InstallUtil.exe MyApp to install the app as a Windows Service. But I can’t find those classes on DotNet5. They won’t be ported? There are any other approach to replace them? Can anyone point me ..
I have a .net 5.0 windows service defined as bellow .UseWindowsService(); which is set to auto start delayed but it wont start automatically only manually so I know that there no issue with the service its self. the only thing I can think of is that the service uses System.IO.FileWatcher and System.IO.Pipes. is that a ..
Can someone please help me fill my queried results into the existing datatable or a new datatable ”dt is filled with data from a csv file. Dim dataRows As DataRow() = dt.Select(“[Calendar year TEXT] = ‘2020’”) dt.Clear() ‘Clear the datatable dt.Rows.Add(dataRows) ‘Add the result to the existing datatable or a new databletable if possible ? ..
I have a simple .NET 5.0 executable written which is executing in a loop. Everything works fine but whenever Windows goes to sleep and resumes, the program’s loop execution has stopped. Does anyone know how to properly handle cases like this? This is the simple public class Program { public static void Main(string[] args) { ..
I’m having trouble with unmanaged-to-managed callback in C++/CLI. It works exactly one time and then silently fails My managed Device class holds an unmanaged object (GsDevice) from a separate DLL. It gives the unamanaged object a callback function set up via interop. GsDevice needs to asynchronously notify Device when things change. The callback was silently ..
Trying to get screenshots of minimized windows in my C# program (I’m able to use either Core 3 or .NET 5, application has to be cross platform – bare minimum, has to work on Mac + Windows). I’m currently using PrintWindow() to get this done but it’s a Win32 function so it’s Windows only. I’m ..
I have an object that keeps the connection to a websocket, only that I have 4 views that have to read this connection, in the home that keeps the connection at a refresh, but if I switch from one view to another it doesn’t keep, how can I solve? how is it possible to keep ..
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