how to replce '=' with " = " insted of "==" in c#

Question

Hi

My Problem is that i want to replace "=" with " = " from string but my string also contains "==" operator i just only want to replace"=" not "==".How it is possible.Plz help

Thanks 

Answer 1

Are you talking about a string replacement or are you talking about in your code?

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Answer 2

Hmm, maybe this might help?

            string text = "The = must be replaced, when == must not be.";
            string newText = "";
            foreach (string word in text.Split(new string[]{" "}, StringSplitOptions.None))
            {
                if (word.Equals("="))
                    newText += string.Format(" {0}  ", word);
                else
                    newText += string.Format("{0} ", word);
            }
            MessageBox.Show(newText);

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Mitja

Answer 3

How about :

string value = 'if ( z == y ) ' ; 

// Basic replace
value = value.Replace( "=", " = " ); 
// Clean-up anything we've wrongly converted
value = value.Replace( " =  = ", " == " ); 

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Regards, Phill W.

Answer 4

Or you use RegularExpressions!

            String input = "The=must be replaced, when == must not be.";
            String pattern = @"\b=\b";
            String replacement = " = ";
            System.Text.RegularExpressions.Regex rgx = new System.Text.RegularExpressions.Regex(pattern);
            String result = rgx.Replace(input, replacement);

Trimmed version:

            System.Text.RegularExpressions.Regex rgx = new System.Text.RegularExpressions.Regex(@"\b=\b");
            String result = rgx.Replace("The=must be replaced, when == must not be.", " = ");

Answer 5

Ah, this RegularExpression is even better for your problem:

Long Version:

            String input = "The=must be replaced, when == must not be.";
            String pattern = @"=(?=.*==)";
            String replacement = " = ";
            System.Text.RegularExpressions.Regex rgx = new System.Text.RegularExpressions.Regex(pattern);
            String result = rgx.Replace(input, replacement);

Short Version:

            System.Text.RegularExpressions.Regex rgx = new System.Text.RegularExpressions.Regex(@"=(?=.*==)");
            String result = rgx.Replace("The=must be replaced, when == must not be.", " = ");