Import a class in ASP.NET

问题

I want to import a class that is in App_Code to use it in my aspx pages.

How can I do it ?

Thanks

回答1:

Add the namespace you used to your codebehind file or aspx file(if not using code behind).

using YourNamespace; //C#
imports YourNamespace //VB

or if not using codebehind

<%@ Import Namespace="YourNamespace" %>  

回答2:

if your app_code class is in another namespace, add a using statement at the top of your code behind. Example:

using MyCustomNamespace;

EDIT: if using vb in your code behind:

imports MyCustomNamespace

回答3:

If you didn't add a Namespace clause in your class you won't need to import anything, you can use the class directly from code behind.

If you have a Namespace clause in the class, just add "Imports YourNamespaceName" in the first line of your code behind.

来源：https://stackoverflow.com/questions/2921207/import-a-class-in-asp-net