要讓記事本默認(rèn)打開特定文件類型，可通過修改註冊表實現(xiàn)，具體步驟如下：1. 修改前先備份註冊表，打開註冊表編輯器後選擇“文件”＞“導(dǎo)出”，保存為.reg文件；2. 在HKEY_CLASSES_ROOT下找到或新建目標(biāo)文件擴(kuò)展名鍵，並確認(rèn)其默認(rèn)值對應(yīng)正確的文件類型標(biāo)識；3. 進(jìn)入該標(biāo)識的shell\open\command路徑，將默認(rèn)值設(shè)為"C:\Windows\System32\notepad.exe" "%1"，注意保留引號；4. 雙擊測試相應(yīng)文件是否由記事本打開，若無效需檢查路徑、標(biāo)識符及命令拼寫。此方法雖不復(fù)雜但需謹(jǐn)慎操作以避免系統(tǒng)問題。

If you want Notepad to open certain file types by default, editing the Windows Registry is one way to do it. It's not something most casual users mess with, but if you know what you're doing, it can be a powerful and flexible method.

Here's how to associate Notepad with specific file types using the Registry:

1. Back Up the Registry Before Making Changes

The Registry controls a lot of system behavior, so any mistake could cause issues. Always back it up before making changes.

• Open regedit by typing regedit in the Start menu.
• Click on File > Export .
• Choose a location and name the backup (eg, Registry_Backup.reg ).
• Make sure "All" is selected under "Export Range".
• Save it for future recovery if needed.

This step only takes a minute and gives you peace of mind.

2. Find or Create the File Extension Key

You need to tell Windows which program to use when opening a particular file type. That's done by editing the key associated with the extension.

• In Registry Editor, go to:
  HKEY_CLASSES_ROOT
• Look for your target file extension — for example, .txt , .log , or .csv .
• If it doesn't exist, right-click → New → Key , and name it like .yourfiletype .

Once you've located or created the key, select it and check the default value on the right side. It should say something like txtfile or another identifier. This refers to the file type definition elsewhere in the Registry.

3. Set the Command to Use Notepad

Now you need to point that file type to Notepad.exe.

• Go to:
  HKEY_CLASSES_ROOT\{FileType}\shell\open\command
  (Replace {FileType} with the identifier from earlier, eg, txtfile )
• Double-click the (Default) value and set it to:
  "C:\Windows\System32\notepad.exe" "%1"

Make sure the quotes are there — especially important if the path contains spaces.

If the shell or open keys don't exist, create them manually by right-clicking the file type key and choosing New → Key repeatedly.

4. Test the New Association

After saving the changes:

• Double-click a file of the type you just edited.
• It should now open in Notepad.

If it doesn't, double-check:

• The path to Notepad is correct.
• You modified the right file type identifier.
• There are no typos in the command string.

Also, some file types might be overridden by other programs or system defaults — especially those handled by the “Open With” settings or newer Windows app associations.

基本上就這些。 It's not complicated once you understand how the Registry maps file types to applications, but it does require attention to detail. Once you get it working, though, you'll have more control over how your system behaves.

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