问题

I have several BusinessObject classes that refer to each other and I need to serialize one in a JsonResponse and return it to my view. I keep getting a circular reference exception and I cannot get rid of it. I have placed the [ScriptIgnore()] decorator on every property that is not a simple data type property and I am still getting the exception. I cant figure out where the problem is, as I am blocking the serializer from just about everything and it is still blowing up on me.

Is there any way to see what they current state of the serialized object is?

    [HttpPost]
    public JsonResult GetAnalysisInfo(int id)
    {
        ProjectContext myDB = db;
        SearchAnalysis searchanalysis = SearchAnalysis.Find(myDB, id);
        //searchanalysis.Results = searchanalysis.SearchResultsPrototype(myDB);
        return this.Json(searchanalysis);
    }

Update

I have also tried implementing ISerializable to no avail. My GetObjectData is very simple:

    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("SearchAnalysisId", this.SearchAnalysisId);
        info.AddValue("Created", this.Created);
    }

Still getting a CircularRefernce error. DateTime data types don't cause problems with Serialization right?

回答1:

What I'm doing to prevent that error is to return an anonymouse type that reflects my object's properties like this :

    public JsonResult CompanyListJson()
    {
        var list = (from companies in appContext.Companies
                    where companies.Active.Equals(true)
                    select new
                    {
                        Name = companies.DbName,
                        Id = companies.Id,
                        Active = companies.Id.Equals(CurrentCompany.Id)

                    });
        return Json(list, JsonRequestBehavior.AllowGet);
    }

Maybe it's not the best way, but it allows me to keep my JSON thin and push only the data I need ( and avoid that circular reference exception of course )

Looking at your sample, I would select new anonymouse type from SearchAnalysis, taking the properties I need. That should work

来源：https://stackoverflow.com/questions/9263987/circular-references-and-scriptignore-problems

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