如何创建一个将在asp.net mvc中返回当前PageData的包装器？

Question

i want to create a wrapper class that will let me use PageData as it was a strongly typed class.
i used this method before in asp.net using HttpContext.Current.Session to define all the items i can store in the session and all the manipulation of the session was done through that class.
example

namespace app.Web
{
    public static class Session
    {
        public string UserName
        {
        get { return HttpContext.Current.Session["UserName"] as string; }
        set { HttpContext.Current.Session["UserName"] = value; }
        }
        ...........
    }
}

i want to know how to get the Pagedata in a similar way.

Answer 1

PageData is only available within the page itself, not available anywhere else (like the controller). The best way to do this is with extension methods.

Frederik Vig wrote a blog post showing how this might be done.

Example:

namespace PageData.Extensions
{
    public static partial class PageDataExtensions
    {
        public static string UserName(this PageData page)
        {
            return page["UserName"] as string;
        }
    }
}

BTW, you can use the same method for Session as well, which might be cleaner than the method you propose.

Edit:

Based on your comments, there are several other options.

1. Create your data as a class and add that class as an extension. ie Like above, but make it PageData.Utils.UserName this way it adds only a single item to the PageData intellisense and doesn't clutter it too much, and allows you to filter out the PageData methods from extension methods.
2. Create your static class just like you want to, but use methods instead of properties.

Example:

public static class Utils
{
    public static string UserName(IDictionary<object,dynamic> pageData) {
        return pageData["UserName"] as string;
    }
}

Then in your code just do this (assuming you have the proper @using statements in your view):

@Utils.UserName(PageData)