如何正确使用javascript反序列化将json字符串转换为复杂对象？

Question

我的 .ashx 处理程序 (var items=) 中有以下可用的 json 对象：

{"Coverages":{"PersonID":10,"DetCode":"","Reimbursement":"","Deductible":"","MaximumPerAnnum":"","MaximumPerVisit":"","MaximumPerVisits":"","SvcCode":""},"CoverageCombinedMaximums":{"PersonID":10,"DetCode":["AAAAA","BBBBB","CCCCC"],"MaximumPerAnnum":""}} 

public void ProcessRequest (HttpContext context) {
        bool isSuccessful = true;

        var items = context.Request.Params["items"];
        if (isSuccessful)
        {

            JavaScriptSerializer ser = new JavaScriptSerializer();
            AdditionalCoveragesPackage package = ser.Deserialize<AdditionalCoveragesPackage>(items);


        }
        else
        {
            SendErrorMessage(context);
            return;
        } 
    }

这是我尝试反序列化的类的结构：

public class AdditionalCoverage
{
    public int PersonID { get; set; }
    public string DetCode { get; set; }
    public decimal? Reimbursement { get; set; }
    public decimal? Deductible { get; set; }
    public decimal? MaximumPerAnnum { get; set; }
    public decimal? MaximumPerVisit { get; set; }
    public int? MaximumPerVisits { get; set; }
    public string SvcCode { get; set; }

    public AdditionalCoverage()
    {
    }
}

public class AdditionalCoverageCombinedMaximum
{
    public int PersonID { get; set; }
    public string SvcCode { get; set; }
    public decimal? MaximumPerAnnum { get; set; }
    public List<string> DetCode { get; set; }

    public AdditionalCoverageCombinedMaximum()
    {
    }
}

public class AdditionalCoveragesPackage
{
    public List<AdditionalCoverage> Coverages { get; set; }
    public List<AdditionalCoverageCombinedMaximum> CoverageCombinedMaximums { get; set; }

    public AdditionalCoveragesPackage()
    {
    }

    public AdditionalCoveragesPackage(AdditionalCoverage coverage, AdditionalCoverageCombinedMaximum maximum)
    {
        List<AdditionalCoverage> coverages = new List<AdditionalCoverage>();
        coverages.Add(coverage);
        Coverages = coverages;

        List<AdditionalCoverageCombinedMaximum> maximums = new List<AdditionalCoverageCombinedMaximum>();
        maximums.Add(maximum);
        CoverageCombinedMaximums = maximums;
    }

    public AdditionalCoveragesPackage(List<AdditionalCoverage> coverages, List<AdditionalCoverageCombinedMaximum> maximums)
    {
        Coverages = coverages;
        CoverageCombinedMaximums = maximums;
    }
}

编辑： 这是我需要更正的客户端方法：

function saveCoverageDetails() {
                var handler = "HttpHandlers/UpdateAdditionalCoverageDetailsHandler.ashx";
                var coverages = { PersonID: personId, DetCode: "", Reimbursement: "", Deductible: "", MaximumPerAnnum: "", MaximumPerVisit: "", MaximumPerVisits: "", SvcCode: "" };
                var maximums = { PersonID: personId, DetCode: ["ACUPUN", "PODIAT", "OSTEOP"], MaximumPerAnnum: "" };
                var obj = { Coverages: coverages, CoverageCombinedMaximums: maximums };


                var data = ({ items: JSON.stringify(obj) });
                callHandler(handler, data, saveSuccessful, failure);

            }
   function callHandler(handler, obj, onSuccess, onFail) {

                $.ajax({
                    type: "POST",
                    url: handler,
                    data: obj,
                    dataType: "json",
                    success: onSuccess,
                    fail: onFail

                });

            }

当我使用 javascript 序列化程序，它确实返回我的AdditionalCoveragesPackage 对象 - 但是 - 这两个属性：Coverages 和CombinedMaximums 都是空的。如何让它正确反序列化我的 json 字符串？

Answer 1

在您的 JSON 字符串中， Coverages 和 CoverageCombinedMaximums 是简单对象，而不是数组，因此：

public class AdditionalCoveragesPackage
{
    public AdditionalCoverage Coverages { get; set; }
    public AdditionalCoverageCombinedMaximum CoverageCombinedMaximums { get; set; }
}

同样在您的示例 JSON 中：

"MaximumPerAnnum":""

因此请确保将相应的属性定义为可为空的小数：

public decimal? MaximumPerAnnum { get; set; }

或解串器将会烧毁。

Answer 2

JSON 中的 Coverages 和 CombinedMaximums 属性是对象，而不是数组。
您应该将它们更改为数组或更改 C# 类以不使用 List。

Answer 3

SLAKS 和 达林·迪米特洛夫 都帮了很多忙。如果我按如下方式编写 JSON 字符串，最终它会起作用（我的数组结构不正确，并且为我的数字类型传递空字符串而不是零）。这是更正后的客户端代码：

 var handler = "HttpHandlers/UpdateAdditionalCoverageDetailsHandler.ashx";
                var coverages = [{ PersonID: personId, DetCode: "", Reimbursement: 0, Deductible: 0, MaximumPerAnnum: 0, MaximumPerVisit: 0, MaximumPerVisits: 0, SvcCode: "" }, { PersonID: personId, DetCode: "CHIROP", Reimbursement: 0, Deductible: 0, MaximumPerAnnum: 0, MaximumPerVisit: 0, MaximumPerVisits: 0, SvcCode: ""}];
                var maximums = [{ PersonID: personId, DetCode: ["ACUPUN", "PODIAT", "OSTEOP"], MaximumPerAnnum: 0 }, { PersonID: personId, DetCode: ["ACUPUN", "PODIAT", "OSTEOP"], MaximumPerAnnum: 0}];
                var obj = { Coverages: coverages, CoverageCombinedMaximums: maximums };

                var data = ({ items: JSON.stringify(obj) });
                callHandler(handler, data, saveSuccessful, failure);