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c#com-port

"Provider is not capable of the attempted operation" exception when I want to create COM


This is a sample code for creating COM. first Create a new instance of the Win32_PnPEntity WMI class then Create a new instance of the Win32_PnPEntity class. It seems to some things wrong with Win23_PnPEntity.

I run this "wmic /namespace:\root\cimv2 path Win32_PnPEntity get ProviderType /format:list " and get "Node - DEV-2023 ERROR: Description = Invalid query"

ManagementScope scope = new ManagementScope(@"\\.\root\cimv2");

        // Create a new instance of the Win32_SerialPort WMI class
        ManagementClass serialClass = new ManagementClass(scope, new ManagementPath("Win32_SerialPort"), new ObjectGetOptions());

        // Create a new instance of the Win32_SerialPort class
        ManagementObject serial = serialClass.CreateInstance();

        // Set the properties for the new serial port
        serial["DeviceID"] = "COM3"; // Set the COM port number
        serial["Name"] = "My Serial Port"; // Set the name of the port
        serial["Description"] = "This is my serial port"; // Set the description
        serial["Caption"] = "My Serial Port"; // Set the caption
        //serial["ProviderType"] = "RS232"; // Set the provider type

        // Save the new serial port instance
        serial.Put();

Solution

  • After some search about this, it seems, creating a virtual serial port requires kernel-level support, usually in the form of a driver. As such, this cannot be done in C#.