Extension methods in class library project
- by Mostafa
I've implemented some extension methods and put those in separate Class Library project.
Imagine I have a simple extension method like this in class library called MD.Utility:
namespace MD.Utility
{
public static class ExtenMethods
{
public static bool IsValidEmailAddress(this string s)
{
Regex regex = new Regex(@"^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$");
return regex.IsMatch(s);
}
}
}
But nowhere in WebApp like App_code folder or WebFroms code-behind page I can't use this Extension method. If I do like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MD.Utility;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string email = "[email protected]";
if (email.IsValidEmailAddress())
{
//To do
}
}
}
The compiler doesn't recognize IsValidEmailAddress() and even no intellisense support.
While if I put my extension method in App_Code folder it's ok for using in another cs file in App_code Folder or Web Form code-behind pages.
