CODEWITHSUNDEEP
c#asp.net-mvc-3
Slinky
Slinky

Reputation: 5832

Custom String Helper in C#

I created a helper method that takes a string and replaces all of the newlines with HTML line breaks. I currently have the method in a helper class that needs to be called statically.

How can I simply add my helper method to the builtin C# string class?

So this is what I would like to be able to do:

m.MailingAddress = m.MailingAddress.ReplaceNewlines("<br />");

This is what I am doing currently:

m.MailingAddress = Utility.ObjectExtensions.ReplaceNewlines(m.MailingAddress,"<br />");

Upvotes: 1

Views: 4418

Answers (3)

Sria Pathre
Sria Pathre

Reputation: 182

You can use extension method: Extension method should be declared in static class.

   public static class Helper
    {
       public static ReplaceNewLines(this string currentStr, string replaceWith)
       {
          return Utility.ObjectExtensions.ReplaceNewlines(currentStr, replaceWith);
       }
    }


Click here for more details.

Upvotes: 1

sszarek
sszarek

Reputation: 424

Create extension method like this (putting your helper to method body for convenience):

public static class StringHelpers
{
   public static ReplaceNewLinesExt(this string str, string replacement)
   {
      return Utility.ObjectExtensions.ReplaceNewlines(str, replacement);
   }
}

Then after adding namespace in which your helper resides you can use extension method like that:

...
var modified = someString.ReplaceNewLinesExt("<br />");
...

You can read more about extension methods in MSDN article

Upvotes: 0

Roy Dictus
Roy Dictus

Reputation: 33139

You create a static class with extension methods, like so:

public static class StringExtensions
{
    public static string ReplaceNewlines(this string text, string toReplace)
    {
       ...
    }
}

The this keyword identifies the method as an extension, in this case to the string class.

Upvotes: 6

Related Questions