CODEWITHSUNDEEP
c#.net
Serak Shiferaw
Serak Shiferaw

Reputation: 1021

how to replace richtextbox.rtf if and only if the whole word match?

my original replace code is.

rtTextArea.Rtf = rtTextArea.Rtf.Replace(oldtext, newtext);

but the problem is it replaces all occurence of the words instead of the required word e.g origianl word :- hello my name is serak and am in israel replace() -- is with are the whole word chages to "are serak and am in arereal"

is there anyway i can include a condition or something to match the whole word? my working environment C#.

Upvotes: 0

Views: 1434

Answers (3)

Saggio
Saggio

Reputation: 2274

Using RegEx for this is the correct approach, but just for brevity you could also prepend/append a space to the word you want to replace to ensure it is not a part of another word.

e.g. wordToReplace = " " + wordToReplace + " ";

Upvotes: 0

dnennis
dnennis

Reputation: 140

The previous post showed

var regExp = new System.Text.RegularExpressions.Regex(@"\b"+oldtext+@"\b"); rtTextArea.Rtf = regExp.Replace(rtTextArea.Rtf, newtext);

Which is a little different from the first post. Notice the extra b and @

This worked for me.

Upvotes: 0

Michael Minton
Michael Minton

Reputation: 4495

Use Regular expressions. In this example the \b represents a Word Boundary.

var regExp = new System.Text.RegularExpressions.Regex(@"\bis\b");
rtTextArea.Rtf = regExp.Replace(rtTextArea.Rtf, "are");

Upvotes: 1

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