.Net Core - copy to clipboard?
This project of mine (https://github.com/SimonCropp/TextCopy) uses a mixed approach of PInvoke and command line invocation. it currently supports
- Windows with .NET Framework 4.6.1 and up
- Windows with .NET Core 2.0 and up
- Windows with Mono 5.0 and up
- OSX with .NET Core 2.0 and up
- OSX with Mono 5.20.1 and up
- Linux with .NET Core 2.0 and up
- Linux with Mono 5.20.1 and up
Usage:
Install-Package TextCopy
TextCopy.ClipboardService.SetText("Text to place in clipboard");
Or just use the actual code
Windows
https://github.com/CopyText/TextCopy/blob/master/src/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();
}
macOS
https://github.com/CopyText/TextCopy/blob/master/src/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/CopyText/TextCopy/blob/master/src/TextCopy/LinuxClipboard_2.1.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);
}
}
}
Clipboard class is missing, hope in near future will be add an option for that. While it happen ... you can run a native shell command with ProcessStartInfo.
I'm noob in Net Core, but create this code to send and string to clipboard on Windows and Mac:
OS Detection Class
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
Based on 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;
}
}
Clipboard Class
public static class Clipboard
{
public static void Copy(string val)
{
if (OperatingSystem.IsWindows())
{
$"echo {val} | clip".Bat();
}
if (OperatingSystem.IsMacOS())
{
$"echo \"{val}\" | pbcopy".Bash();
}
}
}
Then Finally, you can call Clipboard Copy and can get the value on the clipboard.
var dirPath = @"C:\MyPath";
Clipboard.Copy(dirPath);
Hope it help others! Improvements are welcome.
I'm working in a ToolBox library for .net core with all this things: https://github.com/deinsoftware/toolbox (also available as NuGet Package).
Run a command in external terminal with .Net Core: https://dev.to/deinsoftware/run-a-command-in-external-terminal-with-net-core-d4l