关于Avalonia11.3.10写入系统剪切板内容，在dde-file-manager粘贴时报未知错误的讨论

[BruceStoneZhang]

有没有利用C# .Net和Avalonia在UOS下使用过剪切板粘贴文件的大佬，目前已经实现从系统复制，然后在软件内粘贴，可是卡在软件复制，系统粘贴，右键菜单也有显示粘贴项，在粘贴时报错，从-到-是空的
。

查了/var/log/messages日志：

2025-12-16 16:04:41 bruce-PC dde-desktop[3335]: url is invalid !!! url = QUrl("")
2025-12-16 16:04:41 bruce-PC dde-desktop[3335]: create selected FileInfo failed: "" ""
2025-12-16 16:04:41 bruce-PC dde-desktop[3335]: Shred: create dconfig failed: "config is already added"
2025-12-16 16:04:41 bruce-PC dde-desktop[3335]: QWidget::insertAction: Attempt to insert null action
2025-12-16 16:04:41 bruce-PC dde-desktop[3335]: QWidget::insertAction: Attempt to insert null action
2025-12-16 16:04:41 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
2025-12-16 16:04:41 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
2025-12-16 16:04:41 bruce-PC kwin_x11[3119]: Length 2 runs past end of data
2025-12-16 16:04:42 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
2025-12-16 16:04:42 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
2025-12-16 16:04:43 bruce-PC kwin_x11[3119]: Length 2 runs past end of data
2025-12-16 16:04:43 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
2025-12-16 16:04:43 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
2025-12-16 16:04:43 bruce-PC kwin_x11[3119]: Length 2 runs past end of data
2025-12-16 16:04:48 bruce-PC dde-desktop[3335]: url is invalid !!! url = QUrl("")
2025-12-16 16:04:48 bruce-PC dde-desktop[3335]: create selected FileInfo failed: "" ""
2025-12-16 16:04:48 bruce-PC dde-desktop[3335]: Shred: create dconfig failed: "config is already added"
2025-12-16 16:04:48 bruce-PC dde-desktop[3335]: QWidget::insertAction: Attempt to insert null action
2025-12-16 16:04:48 bruce-PC dde-desktop[3335]: QWidget::insertAction: Attempt to insert null action
2025-12-16 16:04:48 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
2025-12-16 16:04:48 bruce-PC dde-desktop[3335]: Length 2 runs past end of data
然后也获取了系统剪切板的内容：

点击按钮创建一个测试文件并剪切

❌ 📋 剪贴板文件信息

操作类型: 复制

文件数量: 1

📄 some.txt

类型: 复制

路径: /home/bruce/Desktop/some.txt

大小: 395

时间: 2025-12-12 15:55:36

❌ 剪贴板Formats: text/plain, Text, TEXT, x-special/gnome-copied-files, x-dfm-copied/file-icons, Files, text/x-moz-url, TIMESTAMP

❌ 剪贴板Formats(byte[28]):

text/plain

{0x2F,0x68,0x6F,0x6D,0x65,0x2F,0x62,0x72,0x75,0x63,0x65,0x2F,0x44,0x65,0x73,0x6B,0x74,0x6F,0x70,0x2F,0x73,0x6F,0x6D,0x65,0x2E,0x74,0x78,0x74 }

❌ 剪贴板Formats(byte[28]):

text/plain

/home/bruce/Desktop/some.txt

❌ 剪贴板Formats(string):

Text

/home/bruce/Desktop/some.txt

❌ 剪贴板Formats(byte[28]):

TEXT

{0x2F,0x68,0x6F,0x6D,0x65,0x2F,0x62,0x72,0x75,0x63,0x65,0x2F,0x44,0x65,0x73,0x6B,0x74,0x6F,0x70,0x2F,0x73,0x6F,0x6D,0x65,0x2E,0x74,0x78,0x74 }

❌ 剪贴板Formats(byte[28]):

TEXT

/home/bruce/Desktop/some.txt

❌ 剪贴板Formats(byte[40]):

x-special/gnome-copied-files

{0x63,0x6F,0x70,0x79,0x0A,0x66,0x69,0x6C,0x65,0x3A,0x2F,0x2F,0x2F,0x68,0x6F,0x6D,0x65,0x2F,0x62,0x72,0x75,0x63,0x65,0x2F,0x44,0x65,0x73,0x6B,0x74,0x6F,0x70,0x2F,0x73,0x6F,0x6D,0x65,0x2E,0x74,0x78,0x74 }

❌ 剪贴板Formats(byte[40]):

x-special/gnome-copied-files

copy

file:///home/bruce/Desktop/some.txt

❌ 剪贴板Formats(byte[102]):

x-dfm-copied/file-icons

{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00,0x44,0x00,0x49,0x00,0x63,0x00,0x6F,0x00,0x6E,0x00,0x50,0x00,0x72,0x00,0x6F,0x00,0x78,0x00,0x79,0x00,0x45,0x00,0x6E,0x00,0x67,0x00,0x69,0x00,0x6E,0x00,0x65,0x00,0x00,0x00,0x14,0x00,0x74,0x00,0x65,0x00,0x78,0x00,0x74,0x00,0x2D,0x00,0x70,0x00,0x6C,0x00,0x61,0x00,0x69,0x00,0x6E,0x00,0x00,0x00,0x0A,0x00,0x62,0x00,0x6C,0x00,0x6F,0x00,0x6F,0x00,0x6D,0x00,0x00,0x00,0x14,0x00,0x74,0x00,0x65,0x00,0x78,0x00,0x74,0x00,0x2D,0x00,0x70,0x00,0x6C,0x00,0x61,0x00,0x69,0x00,0x6E }

❌ 剪贴板Formats(byte[102]):

x-dfm-copied/file-icons

❌ 剪贴板Formats(unknown):

Files

Avalonia.Platform.Storage.IStorageItem[]

❌ 剪贴板Formats(byte[74]):

text/x-moz-url

{0x66,0x00,0x69,0x00,0x6C,0x00,0x65,0x00,0x3A,0x00,0x2F,0x00,0x2F,0x00,0x2F,0x00,0x68,0x00,0x6F,0x00,0x6D,0x00,0x65,0x00,0x2F,0x00,0x62,0x00,0x72,0x00,0x75,0x00,0x63,0x00,0x65,0x00,0x2F,0x00,0x44,0x00,0x65,0x00,0x73,0x00,0x6B,0x00,0x74,0x00,0x6F,0x00,0x70,0x00,0x2F,0x00,0x73,0x00,0x6F,0x00,0x6D,0x00,0x65,0x00,0x2E,0x00,0x74,0x00,0x78,0x00,0x74,0x00,0x0D,0x00,0x0A,0x00 }

❌ 剪贴板Files:

❌

/home/bruce/Desktop/some.txt

❌ 剪贴板DataTransfer: Avalonia.X11.Clipboard.ClipboardDataTransfer

❌

剪贴板DataTransfer.Item: Avalonia.Input.Platform.PlatformDataTransferItem+SingleFormatItem

❌

剪贴板DataTransfer.Item: Avalonia.X11.Clipboard.ClipboardDataTransferItem

❌ 剪贴板DataTransfer.Formats: Platform: text/plain

❌ 剪贴板DataTransfer.Formats: Item: text/plain, Kind: Platform

❌ 剪贴板DataTransfer.Formats: Universal: Text

❌ 剪贴板DataTransfer.Formats: Item: Text, Kind: Universal

❌ 剪贴板DataTransfer.Formats: Platform: TEXT

❌ 剪贴板DataTransfer.Formats: Item: TEXT, Kind: Platform

❌ 剪贴板DataTransfer.Formats: Platform: x-special/gnome-copied-files

❌ 剪贴板DataTransfer.Formats: Item: x-special/gnome-copied-files, Kind: Platform

❌ 剪贴板DataTransfer.Formats: Platform: x-dfm-copied/file-icons

❌ 剪贴板DataTransfer.Formats: Item: x-dfm-copied/file-icons, Kind: Platform

❌ 剪贴板DataTransfer.Formats: Universal: File

❌ 剪贴板DataTransfer.Formats: Item: File, Kind: Universal

❌ 剪贴板DataTransfer.Formats: Platform: text/x-moz-url

❌ 剪贴板DataTransfer.Formats: Item: text/x-moz-url, Kind: Platform

❌ 剪贴板DataTransfer.Formats: Platform: TIMESTAMP

❌ 剪贴板DataTransfer.Formats: Item: TIMESTAMP, Kind: Platform

[BruceStoneZhang]

ClipboardDemoNew.zip
可参考Avalonia、QT剪切板源码Demo。

复现步骤：
1、运行Avalonia项目点击创建临时文件并写入剪切板；
2、在桌面文件夹右键可见粘贴菜单，点击粘贴，报未知错误；
3、此时运行QT项目，读取剪切板内容，可见text/uri-list一项为0字节；
4、在QT项目，再次读取剪切板内容，可见能读取到text/uri-list内容；
5、关闭Avalonia应用程序，在桌面文件夹重新粘贴，粘贴文件成功；

[BLumia]

在UOS下

如果你的环境是 UOS 20 的话，建议优先考虑联系商业支持。这里是 deepin （社区版，目前主线版本是 25）相关的开发活动发生的场所，即便你的问题能在 deepin 25 发生，相关的解决方案也有可能不适用于 UOS 20。

如果确实目标环境是 deepin 25 的话，对照一下 dolphin 会正常吗？

[BruceStoneZhang]

感谢回复，已寻求商业支持，有找到一个C操作剪切板的Demo，因我们开发框架是Avalonia，尝试用C#重写未能成功。
我会再在deepin 25测试，再次感谢！

[BruceStoneZhang]

今天在deepin v25 社区版，测试了一下，同样的情况，生成的临时文件成功复制到剪切板，不能成功在桌面文件夹粘贴。

[BruceStoneZhang]

AvaloniaApp20251231.zip
QTClipboardDemo20251231.zip
附件是两个源码项目，Avalonia和QT，重现步骤：
1、安装dotnet8.0sdk：（wget https://packages.microsoft.com/config/debian/13/packages-microsoft-prod.deb -O packages-microsoft-prod.deb && sudo dpkg -i packages-microsoft-prod.deb && sudo apt-get update && sudo apt-get install -y dotnet-sdk-8.0）
2、进入Avalonia项目目录运行（dotnet run）
3、在Avalonia示例软件中，点击“创建临时文件并复制到剪切板"，此时检查剪切板，可看到各项Formats已写入剪切板；
4、在桌面文件夹粘贴，失败；
5、进入QTClipboardDemo项目目录运行（./QTClipboardDemo）
6、在QT示例软件中，点击”检查剪切板“，会发现text/uri-list获取不到，为0字节，怀疑为关键问题点；
7、此时关闭Avalonia示例软件，在桌面粘贴，成功。

[zccrs]

写入剪切板的是什么数据，文件？
有没有试过在其它软件中粘贴是否ok？

[BruceStoneZhang]

写入的是文件路径，在Win和Ubuntu粘贴是成功的。
主要写入的Format有text/plain, Text, TEXT, x-special/gnome-copied-files, x-dfm-copied/file-icons, Files, text/x-moz-url, TIMESTAMP。

[zccrs]

win和ubuntu环境变化太多了。请在有问题的环境上试试 xclip-pastefile 或其它软件。

[zccrs]

可以用 xclip-pastefile 试试

[BruceStoneZhang]

试了下，成功的：

[BruceStoneZhang]

系统都是初始新安装的，所以应该不是系统用坏了：
bruce@bruce-PC:/persistent/home/bruce/Projects$ mkdir clipboard
bruce@bruce-PC:/persistent/home/bruce/Projects$ cd clipboard/
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ ls
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ mkdir doc
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ ls
doc
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ echo "A file created on ${HOSTNAME}" > file1
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ ls
doc file1
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ xclip-copyfile file1
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ ls
doc file1
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard$ cd doc/
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard/doc$ xclip-pastefile
file1
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard/doc$ ls
file1
bruce@bruce-PC:/persistent/home/bruce/Projects/clipboard/doc$ cat file1
A file created on bruce-PC

[zccrs]

OK