如何在C#中设置文件类型关联

发布于 2024-12-27 07:09:55 字数 202 浏览 4 评论 0 原文

我有一个 MDI 应用程序。该 MDI 应用程序还有许多其他工具，包括编辑器。我想使用 MDI 应用程序的编辑器打开所有“.txt”文件，从而使我的应用程序成为所有“.txt”文件的默认查看器。

每当用户编辑“.txt”文件时，MDI 应用程序都应启动，并且编辑器窗口应填充所选“.txt”文件的内容。

请问有什么办法可以做到这一点吗？

谢谢

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可爱咩 2025-01-03 07:09:55

在我的应用程序中，我在启动时执行此操作：

[System.Runtime.InteropServices.DllImport("Shell32.dll")]
private static extern int SHChangeNotify(int eventId, int flags, IntPtr item1, IntPtr item2);

private void GetDefaultsFromRegistry()
{
    if (Registry.GetValue("HKEY_CLASSES_ROOT\\MyApp", String.Empty, String.Empty) == null)
    {
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\MyApp", "", "My File Type");
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\MyApp", "FriendlyTypeName", "My Friendly Type Name");
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\MyApp\\shell\\open\\command", "", 
            "path\\to\\my\\app \"%1\"");
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\.ext", "", "MyApp");

        //this call notifies Windows that it needs to redo the file associations and icons
        SHChangeNotify(0x08000000, 0x2000, IntPtr.Zero, IntPtr.Zero);
    }
}

当然，将所有路径、名称和扩展名更改为您的应用程序。

不过，请务必小心弄乱用户的 .txt 文件关联。我在每次启动时检查分配，因为我的应用程序使用自定义类型并且仅部署在内部映像系统上。我不知道您的应用程序部署在哪里，但如果我从互联网上下载的某些随机实用程序不断更改我的 .txt 文件关联，我会非常恼火，而且我相信很多其他人也会如此。

In my application, I do this at launch:

[System.Runtime.InteropServices.DllImport("Shell32.dll")]
private static extern int SHChangeNotify(int eventId, int flags, IntPtr item1, IntPtr item2);

private void GetDefaultsFromRegistry()
{
    if (Registry.GetValue("HKEY_CLASSES_ROOT\\MyApp", String.Empty, String.Empty) == null)
    {
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\MyApp", "", "My File Type");
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\MyApp", "FriendlyTypeName", "My Friendly Type Name");
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\MyApp\\shell\\open\\command", "", 
            "path\\to\\my\\app \"%1\"");
        Registry.SetValue("HKEY_CURRENT_USER\\Software\\Classes\\.ext", "", "MyApp");

        //this call notifies Windows that it needs to redo the file associations and icons
        SHChangeNotify(0x08000000, 0x2000, IntPtr.Zero, IntPtr.Zero);
    }
}

With all paths, names, and extensions changed to your application, of course.

Do be careful with messing with the user's .txt file association, though. I check the assignment on every launch because my application is using a custom type and is only deployed on in-house imaged systems. I don't know where your application is being deployed, but I would be very annoyed if some random utility I downloaded from the internet was constantly changing my .txt file association, and I'm sure a lot of other people would be too.

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零度℉ 2025-01-03 07:09:55

您需要更改此注册表项：

HKCR\txtfile\shell\open\command

将参数的默认值更改为程序末尾的%1。然后在您的程序中处理命令行参数以执行您想要的操作。

You need to change this reg key:

HKCR\txtfile\shell\open\command

Change the default value to your program with %1 at the end for parameters. Then in your program handle the command line args to do what you want with it.

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