Using a Razor @functions in several webpages (.csh

问题:

I have the below function that I would like to be available to several .cshtml views in my asp.net web pages 2 application. How can I make this function available to any view in the application (as opposed to just one).

@functions {

    public bool DisplayButton(String startDate, String endDate)
    {
        return Convert.ToDateTime(startDate) < DateTime.Now && Convert.ToDateTime(endDate) > DateTime.Now;
    }
}

回答1:

Create a file called Functions.cshtml in App_Code and then paste the code you have into the file. Then you can call the DisplayButton method in any .cshtml file by prefixing it with the file name:

var myBool = Functions.DisplayButton(DateTime.Now, DateTime.Now.AddDays(30));

For more on working with functions and helpers in ASP.NET Web Pages, read this: http://www.mikesdotnetting.com/Article/173/The-Difference-Between-@Helpers-and-@Functions-In-WebMatrix

回答2:

You can define "global" helper functions in a Razor file in the AppCode directory as described here: http://weblogs.asp.net/scottgu/archive/2011/05/12/asp-net-mvc-3-and-the-helper-syntax-within-razor.aspx. However, helpers only render page elements; they cannot return a value (or more correctly, the returned value is the HTML markup to be rendered).

If you need to return a value, your best bet is an extension method.

回答3:

Don't see why you couldn't have a static class with a static method and just include it at the top of every view and then use it