Question

我正在从SSIS的脚本任务中制作一个非常简单的JSON请求。 URL返回非常大，有2000万个字符。

第一个网址返回行如下所示：

[{"brandId":"9","season":"SG","year":"2003","bomNumber":"00011111","costId":"00001","bomCCNumber":"0000008","firstCost":1.01,"landedFactor":1.234,"elc":9.876,"market":"MA","channel":"CH","destinationCountry":"DC"},...

我通过解析器运行网址返回并验证其格式正确。

这是我的代码。

[DataContract]
public class CostingNegotiated
{

    [DataMember(Name = "brandId")]
    public string brandId { get; set; }

    [DataMember(Name = "season")]
    public string season { get; set; }

    [DataMember(Name = "year")]
    public string year { get; set; }

    [DataMember(Name = "bomNumber")]
    public string bomNumber { get; set; }

    [DataMember(Name = "costId")]
    public string CostID { get; set; }

    [DataMember(Name = "bomCCNumber")]
    public string bomCCNumber { get; set; }

    [DataMember(Name = "firstCost")]
    public string firstCost { get; set; }
    [DataMember(Name = "landedFactor")]
    public double landedFactor { get; set; }

    [DataMember(Name = "elc")]
    public double elc { get; set; }

    [DataMember(Name = "market")]
    public string market { get; set; }

    [DataMember(Name = "channel")]
    public string channel { get; set; }

    [DataMember(Name = "destinationCountry")]
    public string destinationCountry { get; set; }

}

[DataContract]
public class RootObject
{
    [DataMember(Name = "CostingNegotiatedList")]
    public List<CostingNegotiated> CostingNegotiatedList { get; set; }
}

private RootObject GetWebServiceResult(string wUrl)
{

    HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create(wUrl);
    httpWReq.Method = "GET";
    httpWReq.ContentType = "application/json";
    httpWReq.Timeout = 300000;
    HttpWebResponse httpWResp = (HttpWebResponse)httpWReq.GetResponse();
    RootObject jsonResponse = null;

    try
    {
        //Get the stream of JSON
        Stream responseStream = httpWResp.GetResponseStream();

        //Deserialize the JSON stream
        using (StreamReader reader = new StreamReader(responseStream))
        {
            string r = reader.ReadToEnd();

            //Deserialize our JSON
            DataContractJsonSerializer sr = new DataContractJsonSerializer(typeof(RootObject));
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(r));
            jsonResponse = (RootObject)sr.ReadObject(ms);
        }
    }
    //Output JSON parsing error
    catch (Exception e)
    {
        FailComponent(e.ToString());
    }
    return jsonResponse;

}

我已验证字符串变量r是否具有JSON字符串。当我到达这一行时：

jsonResponse = (RootObject)sr.ReadObject(ms);

jsonResponse有一个RootObject，但CostingNegotiatedList列表变量为NULL。我需要做些什么来填充此列表？

Answer 1

我明白了。我的JSON没有头元素，它只是一个直列表，所以我不需要我的RootObject变量。我更改了代码以引用我的对象列表：

private List GetWebServiceResult（string wUrl） {

HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create(wUrl);
httpWReq.Method = "GET";
httpWReq.ContentType = "application/json";
httpWReq.Timeout = 300000;
HttpWebResponse httpWResp = (HttpWebResponse)httpWReq.GetResponse();
List<CostingNegotiated> jsonResponse = null;

try
{
    //Get the stream of JSON
    Stream responseStream = httpWResp.GetResponseStream();

    //Deserialize the JSON stream
    using (StreamReader reader = new StreamReader(responseStream))
    {
        string r = reader.ReadToEnd();

        //Deserialize our JSON
        DataContractJsonSerializer sr = new DataContractJsonSerializer(typeof(List<CostingNegotiated>));
        MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(r));
        jsonResponse = (List<CostingNegotiated>)sr.ReadObject(ms);
    }
}
//Output JSON parsing error
catch (Exception e)
{
    FailComponent(e.ToString());
}
return jsonResponse;

从Web请求序列化JSON数组

1 个答案: