.Net Core - copy to clipboard?

Question

Is it possible to copy something to the clipboard using .Net Core (in a platform-agnostic way)?

It seems that the Clipboard class is missing, and P/Invoking is

Answer 1

Necromancing.
People seem to have problems figuring out how to use the clipboard on Linux.

Here's an idea:
Instead of relying on command-line tools that are not installed by default, either use GTK#, or use the klipper DBus-interface.
Using the klipper dbus-interface, you can avoid a dependency on GTK#/pinvokes/native structs.

Note: klipper must be running (which it is, if you use KDE). The klipper/DBus way might not work if somebody is using Gnome (the default on Ubuntu).

Here's the code for the Klipper DBus-Interface (a bit large for stackoverflow):
https://pastebin.com/HDsRs5aG

And the abstract class:
https://pastebin.com/939kDvP8

And the actual clipboard-code (requires Tmds.Dbus - for handling DBus)

using System.Threading.Tasks;

namespace TestMe
{
    using NiHaoRS; // TODO: Rename namespaces to TestMe

    public class LinuxClipboard
        : GenericClipboard

    {

        public LinuxClipboard()
        { }


        public static async Task TestClipboard()
        {
            GenericClipboard lc = new LinuxClipboard();
            await lc.SetClipboardContentsAsync("Hello KLIPPY");
            string cc = await lc.GetClipboardContentAsync();
            System.Console.WriteLine(cc);
        } // End Sub TestClipboard 


        public override async Task SetClipboardContentsAsync(string text)
        {
            Tmds.DBus.ObjectPath objectPath = new Tmds.DBus.ObjectPath("/klipper");
            string service = "org.kde.klipper";

            using (Tmds.DBus.Connection connection = new Tmds.DBus.Connection(Tmds.DBus.Address.Session))
            {
                await connection.ConnectAsync();

                Klipper.DBus.IKlipper klipper = connection.CreateProxy(service, objectPath);
                await klipper.setClipboardContentsAsync(text);
            } // End using connection 

        } // End Task SetClipboardContentsAsync 


        public override async Task GetClipboardContentAsync()
        {
            string clipboardContents = null;

            Tmds.DBus.ObjectPath objectPath = new Tmds.DBus.ObjectPath("/klipper");
            string service = "org.kde.klipper";

            using (Tmds.DBus.Connection connection = new Tmds.DBus.Connection(Tmds.DBus.Address.Session))
            {
                await connection.ConnectAsync();

                Klipper.DBus.IKlipper klipper = connection.CreateProxy(service, objectPath);

                clipboardContents = await klipper.getClipboardContentsAsync();
            } // End Using connection 

            return clipboardContents;
        } // End Task GetClipboardContentsAsync 


    } // End Class LinuxClipBoardAPI 


} // End Namespace TestMe

AsyncEx is required in the abstract class for synchronizing in the get/set property. AsyncEx not required for the actual clipboard handling, as long as you don't want to utilize the get/set clipboard contents in a synchronous context.