How to "unprotect" text in a richTextBox

Virgil Bevans

I have a richTextBox in which I have protected a certain block of text by setting the richTextBox.SelectionProtected property to "true". However, it does not appear possible to simply reversed that protection by setting the property to "false". Microsoft documentation says an attempt to change the protected text can be detected by the "protected" event, whereupon changes can be made, but no example is cited. Tried using the "cut" method to simply remove it, but the method fails quietly. Any ideas how this may be accomplished?

3 Replies

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Sujeet Suman10y ago
Accepted answer
Virgil please once try below code:

int start = 0; // Starting position of the protected text
int end = 0; // Ending position of the protected text.
// Set start & end value as per your requirement
RichTextBox temp = new RichTextBox();
temp.Rtf = richTextBox1.Rtf;
temp.SelectionStart = start;
temp.SelectionLength = end - start + 1;
temp.SelectionProtected = false;

If this is helpful for you then please accept my Answer.
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Sujeet Suman10y ago
Good.

If this is helpful for you then please accept my Answer.
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Virgil Bevans10y ago
Sujeet, Thanks for your reply, it was key to my finding the problem. Sadly, the problem was my head. Setting SelectionProtected = false works just fine when it is actually executed. I had neglected to properly register a couple of event delegates, and obviously my debugging was incomplete and faulty. Thanks again for your time.
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