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POParsing JSON with DataContractJsonSerializer Then get a error Could not evaluate expression
 

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  1. POParsing JSON with DataContractJsonSerializer Then get a error Could not evaluate expression
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    <p>The json data is like this </p> <pre><code>{"content": [{"url": "http://job.hust.edu.cn/show/recruitcouncil/recruitfair.htm?id=20830", "company": {"id": "50e25f89b041be4510f09cf8", "index": ["\u67d0", "\u91cd\u5e86\u5e02", "\u91cd\u5e86", "\u653f\u6cd5", "\u673a\u5173"], "name": "\u91cd\u5e86\u5e02\u67d0\u653f\u6cd5\u673a\u5173", "alias": []}, "starttime": 1357606832.0, "address": {"university": "\u534e\u4e2d\u79d1\u6280\u5927\u5b66", "city": "\u6b66\u6c49", "accurate": {"name": "\u5927\u5b66\u751f\u6d3b\u52a8\u4e2d\u5fc3", "longitude": 114.4141960144043, "latitude": 30.51835035703118, "id": "4f4858f1cea1755b6c000000"}, "detail": "\u5927\u5b66\u751f\u6d3b\u52a8\u4e2d\u5fc3302\u5ba4"}, "endtime": 1357615800.0, "id": "50e25f89b041be4510f09cfa"}, {"url": "http://job.hust.edu.cn/show/recruitcouncil/recruitfair.htm?id=20914", "company": {"id": "50ea9ef2b041be0b2669b246", "index": ["\u5e7f\u897f", "\u8d28\u76d1\u5c40", "\u8d28\u76d1"], "name": "\u5e7f\u897f\u8d28\u76d1\u5c40", "alias": []}, "starttime": 1357608654.0, "address": {"city": "\u6b66\u6c49", "university": "\u534e\u4e2d\u79d1\u6280\u5927\u5b66", "detail": "\u4e3b\u6821\u533a\u6559\u5de5\u6d3b\u52a8\u4e2d\u5fc3"}, "endtime": 1357615800.0, "id": "50ea9ef2b041be0b2669b248"}, {"url": "htt://job.hust.edu.cn/show/recruitcouncil/recruitfair.htm?id=20907", "company": {"id": "50ea9ef2b041be0b2669b243", "index": ["\u53d1\u5c55", "\u7535\u529b", "\u6c47", "\u96c6\u56e2", "\u4e30", "\u6c47\u8fbe\u4e30", "\u73e0\u6d77", "\u8fbe"], "name": "\u73e0\u6d77\u6c47\u8fbe\u4e30\u7535\u529b\u53d1\u5c55\uff08\u96c6\u56e2", "alias": []}, "starttime": 1357803004.0, "address": {"city": "\u6b66\u6c49", "university": "\u534e\u4e2d\u79d1\u6280\u5927\u5b66", "detail": "\u897f\u4e5d\u697c224\u5ba4"}, "endtime": 1357813800.0, "id": "50ea9ef2b041be0b2669b245"}, {"url": "htt://job.hust.edu.cn/show/recruitcouncil/recruitfair.htm?id=20717", "company": {"id": "50d07331b041be3b0b10f707", "index": ["\u89c1\u9762", "\u6bd5\u4e1a\u751f", "\u6bd5\u4e1a", "\u4f9b\u9700", "\u5c4a", "\u4f9b\u9700\u89c1\u9762", "\u4e1a\u751f", "\u9762\u4f1a", "\u89c1\u9762\u4f1a", "\u4f1a", "2013"], "name": "2013\u5c4a\u6bd5\u4e1a\u751f\u4f9b\u9700\u89c1\u9762\u4f1a", "alias": []}, "starttime": 1363654837.0, "address": {"university": "\u534e\u4e2d\u79d1\u6280\u5927\u5b66", "city": "\u6b66\u6c49", "accurate": {"name": "\u5149\u8c37\u4f53\u80b2\u9986", "longitude": 114.41835880279541, "latitude": 30.508552777754073, "id": "4f485921cea1755b6d00000f"}, "detail": "\u5149\u8c37\u4f53\u80b2\u9986"}, "endtime": 1363680000.0, "id": "50e25f89b041be4510f09cf7"}], "deleted": [], "count_query": 4} </code></pre> <p>my code is </p> <pre><code>[DataContract] public class Job { [DataMember(Name = "url")] public string Url { set; get; } [DataMember(Name = "company")] public Company Company { set; get; } [DataMember(Name = "starttime")] public long StartTime { set; get; } [DataMember(Name = "address")] public Address Address { set; get; } [DataMember(Name="endtime")] public long EndTime { set; get; } [DataMember(Name="id")] public string Id { set; get; } } [DataContract] public class Address { [DataMember(Name = "university")] public String University { set; get; } [DataMember(Name = "city")] public String City { set; get; } [DataMember(Name="accurate")] public Accurate Accurate { set; get; } [DataMember(Name="detail")] public String Detail { set; get; } } [DataContract] public class Accurate { [DataMember(Name = "name")] public string Name { set; get; } [DataMember(Name = "longitude")] public double Longitude { set; get; } [DataMember(Name="latitude")] public double Latitude { set; get; } [DataMember(Name = "id")] public string Id { set; get; } [DataMember(Name = "detail")] public string Detail { set; get; } } [DataContract] public class Company { [DataMember(Name = "id")] public String Id { set; get; } [DataMember(Name = "index")] public string[] Index { set; get; } [DataMember(Name = "name")] public String Name { set; get; } [DataMember(Name="alias")] public string[] alias { set; get; } } public static T JsonToObject&lt;T&gt;(string json) { //json = str; if (!string.IsNullOrEmpty(json)) { var ms = new MemoryStream(Encoding.UTF8.GetBytes(json)); var ser = new DataContractJsonSerializer(typeof(T)); return (T)ser.ReadObject(ms); } return default(T); } when I debug I get the result jsonDeserializer = null KnownDataContracts = Could not evaluate expression knownDataContracts null </code></pre> <p>I can't obtain any result from this code , can someone help me to parse this json thank you very much!</p>
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