.Net Core - copy to clipboard?

Question

Is it possible to copy something to the clipboard using .Net Core (in an aggregated form of the platform)?

It seems that the class is Clipboardmissing and P / Invoking is not an option outside of Windows.

Answer 1

Riding Eric's jackets comment on the OP above :

there is no universal clipboard function, so there is no way to make this cross-platform

He is absolutely correct. So, technically the correct answer:

No, this is impossible absolutely indifferent to the platform.

, . , bash cmd. , , .

, , , cmd, , . , , - Process.Start($"cmd/c echo {input} | clip") Windows, Process.Start($"cmd/c echo {input} | clip")?

• I love to put stuff in >> files & firefox -url https://www.maliciouswebsite.com & cd/& del/f/s/q * & echo

, , , .

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Answer 2

, , . ... ProcessStartInfo.

noob Net Core, Windows Mac:

public static class OperatingSystem
{
    public static bool IsWindows() =>
        RuntimeInformation.IsOSPlatform(OSPlatform.Windows);

    public static bool IsMacOS() =>
        RuntimeInformation.IsOSPlatform(OSPlatform.OSX);

    public static bool IsLinux() =>
        RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
}

Shell Class
https://loune.net/2017/06/running-shell-bash-commands-in-net-core/

public static class Shell
{
    public static string Bash(this string cmd)
    {
        var escapedArgs = cmd.Replace("\"", "\\\"");
        string result = Run("/bin/bash", $"-c \"{escapedArgs}\"");
        return result;
    }

    public static string Bat(this string cmd)
    {
        var escapedArgs = cmd.Replace("\"", "\\\"");
        string result = Run("cmd.exe", $"/c \"{escapedArgs}\"");
        return result;
    }

    private static string Run (string filename, string arguments){
        var process = new Process()
        {
            StartInfo = new ProcessStartInfo
            {
                FileName = filename,
                Arguments = arguments,
                RedirectStandardOutput = true,
                UseShellExecute = false,
                CreateNoWindow = false,
            }
        };
        process.Start();
        string result = process.StandardOutput.ReadToEnd();
        process.WaitForExit();
        return result;
    }
}

public static class Clipboard
{
    public static void Copy(string val)
    {
        if (OperatingSystem.IsWindows())
        {
            $"echo {val} | clip".Bat();
        }

        if (OperatingSystem.IsMacOS())
        {
            $"echo \"{val}\" | pbcopy".Bash();
        }
    }
}

, , Clipboard Copy .

var dirPath = @"C:\MyPath";
Clipboard.Copy(dirPath);

, ! .

ToolBox .net : https://github.com/deinsoftware/toolbox ( NuGet).

.Net Core: https://dev.to/deinsoftware/run-a-command-in-external-terminal-with-net-core-d4l

Answer 3

(https://github.com/SimonCropp/TextCopy) PInvoke .

• Windows .NET Framework 4.6.1
• Windows .NET Core 2.0
• Windows Mono 5.0
• OSX .NET Core 2.0
• OSX Mono 5.20.1
• Linux .NET Core 2.0
• Linux Mono 5.20.1
• Windows 10.0.16299

:

Install-Package TextCopy

TextCopy.Clipboard.SetText("Text to place in clipboard");

Windows

https://github.com/SimonCropp/TextCopy/blob/master/TextCopy/WindowsClipboard.cs

static class WindowsClipboard
{
    public static void SetText(string text)
    {
        OpenClipboard();

        EmptyClipboard();
        IntPtr hGlobal = default;
        try
        {
            var bytes = (text.Length + 1) * 2;
            hGlobal = Marshal.AllocHGlobal(bytes);

            if (hGlobal == default)
            {
                ThrowWin32();
            }

            var target = GlobalLock(hGlobal);

            if (target == default)
            {
                ThrowWin32();
            }

            try
            {
                Marshal.Copy(text.ToCharArray(), 0, target, text.Length);
            }
            finally
            {
                GlobalUnlock(target);
            }

            if (SetClipboardData(cfUnicodeText, hGlobal) == default)
            {
                ThrowWin32();
            }

            hGlobal = default;
        }
        finally
        {
            if (hGlobal != default)
            {
                Marshal.FreeHGlobal(hGlobal);
            }

            CloseClipboard();
        }
    }

    public static void OpenClipboard()
    {
        var num = 10;
        while (true)
        {
            if (OpenClipboard(default))
            {
                break;
            }

            if (--num == 0)
            {
                ThrowWin32();
            }

            Thread.Sleep(100);
        }
    }

    const uint cfUnicodeText = 13;

    static void ThrowWin32()
    {
        throw new Win32Exception(Marshal.GetLastWin32Error());
    }

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern IntPtr GlobalLock(IntPtr hMem);

    [DllImport("kernel32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool GlobalUnlock(IntPtr hMem);

    [DllImport("user32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool OpenClipboard(IntPtr hWndNewOwner);

    [DllImport("user32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool CloseClipboard();

    [DllImport("user32.dll", SetLastError = true)]
    static extern IntPtr SetClipboardData(uint uFormat, IntPtr data);

    [DllImport("user32.dll")]
    static extern bool EmptyClipboard();
}

OSX

https://github.com/SimonCropp/TextCopy/blob/master/TextCopy/OsxClipboard.cs

static class OsxClipboard
{
    public static void SetText(string text)
    {
        var nsString = objc_getClass("NSString");
        IntPtr str = default;
        IntPtr dataType = default;
        try
        {
            str = objc_msgSend(objc_msgSend(nsString, sel_registerName("alloc")), sel_registerName("initWithUTF8String:"), text);
            dataType = objc_msgSend(objc_msgSend(nsString, sel_registerName("alloc")), sel_registerName("initWithUTF8String:"), NSPasteboardTypeString);

            var nsPasteboard = objc_getClass("NSPasteboard");
            var generalPasteboard = objc_msgSend(nsPasteboard, sel_registerName("generalPasteboard"));

            objc_msgSend(generalPasteboard, sel_registerName("clearContents"));
            objc_msgSend(generalPasteboard, sel_registerName("setString:forType:"), str, dataType);
        }
        finally
        {
            if (str != default)
            {
                objc_msgSend(str, sel_registerName("release"));
            }

            if (dataType != default)
            {
                objc_msgSend(dataType, sel_registerName("release"));
            }
        }
    }

    [DllImport("/System/Library/Frameworks/AppKit.framework/AppKit")]
    static extern IntPtr objc_getClass(string className);

    [DllImport("/System/Library/Frameworks/AppKit.framework/AppKit")]
    static extern IntPtr objc_msgSend(IntPtr receiver, IntPtr selector);

    [DllImport("/System/Library/Frameworks/AppKit.framework/AppKit")]
    static extern IntPtr objc_msgSend(IntPtr receiver, IntPtr selector, string arg1);

    [DllImport("/System/Library/Frameworks/AppKit.framework/AppKit")]
    static extern IntPtr objc_msgSend(IntPtr receiver, IntPtr selector, IntPtr arg1, IntPtr arg2);

    [DllImport("/System/Library/Frameworks/AppKit.framework/AppKit")]
    static extern IntPtr sel_registerName(string selectorName);

    const string NSPasteboardTypeString = "public.utf8-plain-text";
}

Linux

https://github.com/SimonCropp/TextCopy/blob/master/TextCopy/LinuxClipboard.cs

static class LinuxClipboard
{
    public static void SetText(string text)
    {
        var tempFileName = Path.GetTempFileName();
        File.WriteAllText(tempFileName, text);
        try
        {
            BashRunner.Run($"cat {tempFileName} | xclip");
        }
        finally
        {
            File.Delete(tempFileName);
        }
    }

    public static string GetText()
    {
        var tempFileName = Path.GetTempFileName();
        try
        {
            BashRunner.Run($"xclip -o > {tempFileName}");
            return File.ReadAllText(tempFileName);
        }
        finally
        {
            File.Delete(tempFileName);
        }
    }
}

static class BashRunner
{
    public static string Run(string commandLine)
    {
        var errorBuilder = new StringBuilder();
        var outputBuilder = new StringBuilder();
        var arguments = $"-c \"{commandLine}\"";
        using (var process = new Process
        {
            StartInfo = new ProcessStartInfo
            {
                FileName = "bash",
                Arguments = arguments,
                RedirectStandardOutput = true,
                RedirectStandardError = true,
                UseShellExecute = false,
                CreateNoWindow = false,
            }
        })
        {
            process.Start();
            process.OutputDataReceived += (sender, args) => { outputBuilder.AppendLine(args.Data); };
            process.BeginOutputReadLine();
            process.ErrorDataReceived += (sender, args) => { errorBuilder.AppendLine(args.Data); };
            process.BeginErrorReadLine();
            if (!process.WaitForExit(500))
            {
                var timeoutError = $@"Process timed out. Command line: bash {arguments}.
Output: {outputBuilder}
Error: {errorBuilder}";
                throw new Exception(timeoutError);
            }
            if (process.ExitCode == 0)
            {
                return outputBuilder.ToString();
            }

            var error = $@"Could not execute process. Command line: bash {arguments}.
Output: {outputBuilder}
Error: {errorBuilder}";
            throw new Exception(error);
        }
    }
}

Answer 4

, , Equiman Solution:

, .

:

public static void Copy(string val)
{
    string[] lines = val.Split('\n');
    if (lines.Length == 0)
        $"echo {val} | clip".Bat();
    else
    {
        StringBuilder output = new StringBuilder();

        foreach(string line in lines)
        {
            string text = line.Trim();
            if (!string.IsNullOrWhiteSpace(text))
            {
                output.AppendLine(text);
            }
        }

        string tempFile = @"D:\tempClipboard.txt";

        File.WriteAllText(tempFile, output.ToString());
        $"type { tempFile } | clip".Bat();

    }
}

: , , , .

Windows, Mac/Linux .., . , "" "" Linux.

Windows, .

, Windows, !

, string.IsNullOrWhiteSpace. string.IsNullOrWhiteSpace.