Regex question (upper/lower case)?

[Worrow]

How to do it with regex alone in vb.net? In my program, I have to call Ucase()/Lcase() to do the job(with regex.replace()). Is there any function under regex for the task?

 

Thanks in advance.

[Volte]

When you use the RegEx constructor, pass RegexOptions.IgnoreCase as a second parameter.

Dim re As New Regex("your pattern here", RegexOptions.IgnoreCase)

[Worrow]

But how to change a string to upper/lower case by using regex alone?

 

Let's say I want to change "this is the day" to "This Is The Day". How to do it without calling ucase/lcase?

[Volte]

Not that I am aware of. If you are using VB.NET you can use the VB compatability function StrConv:

Dim properCase As String = StrConv("this is the day", VbStrConv.ProperCase)

However, this is rather bad programming practice, since StrConv is not supported by the CLR. Not only that, but it cannot be used from C#.

 

If you want to do it the proper way, you'll need to do it manually, I think.

[Worrow]

I have checked out the examples regards to regex from the docs. They use either ucase/lcase or char.toupper/tolower to get it done.

 

Thanks for your suggestion.