String Replace

[vijy]

hi,
i need to replace the whole word from a string.

for example.
String= "Hi VBFriends, I am learning VB 2010."

i need to replace only VB as C#.

if i put String.Replace, its changing as "Hi C#Friends,I am learning C# 2010."

i used regex, Word boundary but not worked, below my code.

Dim sHTMLStream As String = "Hi VBFriends, I am learning VB 2010."
            Dim oColl As MatchCollection = Regex.Matches("sHTMLStream", "\\bvb\b", RegexOptions.IgnoreCase)
        For Each sTemp As Match In oColl
            MessageBox.Show(sTemp.Value)
        Next

[Edgemeal]

hi,
i need to replace the whole word from a string.

for example.
String= "Hi VBFriends, I am learning VB 2010."

i need to replace only VB as C#.

Couldn't you do it like this?...

Dim sHTMLStream As String = "Hi VBFriends, I am learning VB 2010."
sHTMLStream = Regex.Replace(sHTMLStream, " vb ", " C# ", RegexOptions.IgnoreCase)
MessageBox.Show(sHTMLStream)

[vijy]

Couldn't you do it like this?...

Dim sHTMLStream As String = "Hi VBFriends, I am learning VB 2010."
sHTMLStream = Regex.Replace(sHTMLStream, " vb ", " C# ", RegexOptions.IgnoreCase)
MessageBox.Show(sHTMLStream)

Yes, i tried but after vb if there is "\n" or "\r" in stream means,the word is not replacing.

sHtmlStream i will take from a text file,

"Hi VBFriends,
I am learning VB
2010"

in the above case,the string wont replace.

[J-Deezy]

Try this

Regex.Replace(sHTMLstream, "\bvb\b", "C#", RegexOptions.IgnoreCase)

I just tested it and it worked aok.

The reason yours didn't work was because of your pattern.

pattern = "\\bvb\b"

you put two slashes before the first wordboundary, a double slash is when you wish to include a slash literal (i.e your match will contain a "\" so you don't want the metacharacter) In effect, the pattern YOUR RegEx was looking for was the literal: "\bvb", which isn't what you want.