RichEdit not respecting PlainText with pasted content

问题

I create a new application, drop on a TRichedit and set the PlainText property to true. I then run the application and paste some rich formatted text into the RichEdit.

I would expect it to display as plain text however it shows the content with the formatting.

Anyone know how to use a TRichedit just as plain text (and not using a memo :))

回答1:

You'll need to do the paste manually ensuring that the formatting is ignored.

if Clipboard.HasFormat(CF_TEXT) then
  RichEdit.SelText := Clipboard.AsText; 

Run this code from a message handler for WM_PASTE.

I currently do not know how to intercept the CTRL+V keypress and replace it with this code. The WM_PASTE message is not sent to rich edit controls.

---

As Cody suggests in the comment, one solution is as follows:

• Make sure that all the text in the edit control is marked as protected.
• Subclass TRichEdit and override CNNotify.
• Handle the EN_PROTECTED message, and if msg=WM_PASTE then use the paste as text code above and return 1 from the message handler to indicate that the requested operation (a rich paste) is rejected.

来源：https://stackoverflow.com/questions/6038998/richedit-not-respecting-plaintext-with-pasted-content