asp.net mvc-在操作之间重用控制器值

Question

i have a main Landing page (initial page) in which i need to make a service call. the values of that model will help me determine to show another page/action or not.

lets pick a scenario, Review date if its in past, i will show a new page/action "ReviewData" that is in the same controller .cs class only. If that date is in future, I will show another page/action "Summary" which is also using the same .cs controller class.

Now, if i go to "ReviewData", i need the same service call data that i made above earlier. I don't want to make this service call every now and then, as all these attempts its same value. how do i avoid this and possibly can reuse the data/model values from the first service call?

Answer 1

You need some caching stratergies here is simple cache helper class

using System.Runtime.Caching;  

public class cacheservice: ICacheservice
{
    public T GetOrSet<T>(string cacheKey, Func<T> getItemCallback) where T : class
    {
        T item = MemoryCache.Default.Get(cacheKey) as T;
        if (item == null)
        {
            item = getItemCallback();
            MemoryCache.Default.Add(cacheKey, item, DateTime.Now.AddMinutes(10));
        }
        return item;
    }
}

interface ICacheService
{
    T GetOrSet<T>(string cacheKey, Func<T> getItemCallback) where T : class;
}

Usage:

cacheservice.GetOrSet("CACHEKEY", (delegate method if cache is empty));

Cache provider will check if there's anything by the name of "CACHEKEY" in the cache, and if there's not, it will call a delegate method to fetch data and store it in cache.

Example:

var Data=cacheService.GetOrSet("CACHEKEY", ()=>SomeRepository.GetData())

You can customize according to your needs as well

Answer 2

The answer of the question : - Can reuse the data/model values from the first service call? - Yes. You can achieve this using Tempdata: https://msdn.microsoft.com/en-us/library/system.web.mvc.tempdatadictionary.aspx