Linq to SQL fetching cached results

Question

when I select objects using Linq, i seem to get cached results at first.

I use the following code to fetch an applicant from the DB on GET requests assume that this data is STATE_1

using (AdmissionsAppEntities db = new AdmissionsAppEntities())
{
    // Fetch the user
    ApplicationData applicant = (from a in db.ApplicationDatas
                                         where a.userGUID == userGUID
                                         select a).SingleOrDefault();
}

and the following code to save changes against this record on POST requests, after the SaveChanges is called this record should be in STATE_2

using (AdmissionsAppEntities db = new AdmissionsAppEntities())
{
    // Fetch the user
    var applicant = (from a in db.ApplicationDatas
                       where a.userGUID == userGUID
                       select a).SingleOrDefault();

    if (applicant != null)
    {
        // Save page 1 data
        ...
        applicant.lastUpdate = DateTime.Now;

        db.Entry(applicant).State = EntityState.Modified;
        DataBag.result = db.Entry(applicant).GetValidationResult();
        if (DataBag.result.ValidationErrors.Count == 0)
        {
            db.SaveChanges();
        }
    }
}

if (DataBag.result.ValidationErrors.Count == 0)
{
    return RedirectToAction("PageTwo");
}

The database properly saves STATE_2 (i can see it in the db if I use a sql inspection tool), but on subsequent pageload, STATE_1 is retrieved.

I see tons of results where people are having this issue, but no ideas on how to fix it.

UPDATE 1

I moved the RedirectToAction calls (all my returns) to outside the using block to make sure that each DbContext's Destroy function gets called. Did not appear to solve the problem.

Answer 1

人们实际上遇到了这个问题，所以我将不再赘述，最终我的问题是Orchard CMS将模块页面缓存。