[英]Cannot deserialize the current JSON object (e.g. {“name”:“value”}) into type 'System.Collections.Generic.List
I have the following code 我有以下代码
public async Task<ActionResult> GetExtendedProperties()
{
Uri serviceRoot = new Uri(SettingsHelper.AzureAdGraphApiEndPoint);
var token = AppToken.GetAppToken();
var adClient = AuthenticationHelper.GetActiveDirectoryClient();
Microsoft.Azure.ActiveDirectory.GraphClient.Application app = (Microsoft.Azure.ActiveDirectory.GraphClient.Application)adClient.Applications.Where(
a => a.AppId == SettingsHelper.ClientId).ExecuteSingleAsync().Result;
if (app == null)
{
throw new ApplicationException("Unable to get a reference to application in Azure AD.");
}
string requestUrl = string.Format("https://graph.windows.net/{0}/applications/{1}/extensionProperties?api-version=1.5", SettingsHelper.Tenant, app.ObjectId);
HttpClient hc = new HttpClient();
hc.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue(
"Bearer", token);
HttpResponseMessage hrm = await hc.GetAsync(new Uri(requestUrl));
if (hrm.IsSuccessStatusCode)
{
string jsonresult = await hrm.Content.ReadAsStringAsync();
return View();
}
else
{
return View();
}
}
and it returns this string 它返回这个字符串
{"odata.metadata":"https://graph.windows.net/mysaasapp.onmicrosoft.com/$metadata#directoryObjects/Microsoft.DirectoryServices.ExtensionProperty","value":[{"odata.type":"Microsoft.DirectoryServices.ExtensionProperty","objectType":"ExtensionProperty","objectId":"f751a646-2cc1-4e30-bfc6-a8217c0ce0a3","deletionTimestamp":null,"appDisplayName":"","name":"extension_33e037a7b1aa42ab96936c22d01ca338_Modulos","dataType":"String","isSyncedFromOnPremises":false,"targetObjects":["User"]},{"odata.type":"Microsoft.DirectoryServices.ExtensionProperty","objectType":"ExtensionProperty","objectId":"80aabe1b-b020-41d1-bd2d-cc04af264fe5","deletionTimestamp":null,"appDisplayName":"","name":"extension_33e037a7b1aa42ab96936c22d01ca338_ModulesPerUser","dataType":"String","isSyncedFromOnPremises":false,"targetObjects":["User"]},{"odata.type":"Microsoft.DirectoryServices.ExtensionProperty","objectType":"ExtensionProperty","objectId":"6e3d7592-7a66-4792-b408-891251197868","deletionTimestamp":null,"appDisplayName":"","name":"extension_33e037a7b1aa42ab96936c22d01ca338_Comasdasa3dsdaspInfo","dataType":"String","isSyncedFromOnPremises":false,"targetObjects":["User"]},{"odata.type":"Microsoft.DirectoryServices.ExtensionProperty","objectType":"ExtensionProperty","objectId":"93a26374-4135-4f29-9f24-4154522449ec","deletionTimestamp":null,"appDisplayName":"","name":"extension_33e037a7b1aa42ab96936c22d01ca338_CompInfo","dataType":"String","isSyncedFromOnPremises":false,"targetObjects":["User"]},{"odata.type":"Microsoft.DirectoryServices.ExtensionProperty","objectType":"ExtensionProperty","objectId":"21a8a3d4-f4b4-45b4-8d07-55d450db35f2","deletionTimestamp":null,"appDisplayName":"","name":"extension_33e037a7b1aa42ab96936c22d01ca338_CompanyNameForSaasApp","dataType":"String","isSyncedFromOnPremises":false,"targetObjects":["User"]},{"odata.type":"Microsoft.DirectoryServices.ExtensionProperty","objectType":"ExtensionProperty","objectId":"7b3109e0-8710-4d1a-81c3-2b6a83fb62ee","deletionTimestamp":null,"appDisplayName":"","name":"extension_33e037a7b1aa42ab96936c22d01ca338_Compania","dataType":"String","isSyncedFromOnPremises":false,"targetObjects":["User"]}]}
Using json2charp, I created this class: 使用json2charp,我创建了此类:
public class ActiveDirectorySchemaExtension
{
public string objectType { get; set; }
public string objectId { get; set; }
public object deletionTimestamp { get; set; }
public string appDisplayName { get; set; }
public string name { get; set; }
public string dataType { get; set; }
public bool isSyncedFromOnPremises { get; set; }
public List<string> targetObjects { get; set; }
}
How can I convert that string into a List so that I can easy manipulate it on the view? 如何将字符串转换为列表,以便可以在视图上轻松操作它?
Update: I tried this: 更新:我试过了:
List<ActiveDirectorySchemaExtension> tmp = JsonConvert.DeserializeObject<List<ActiveDirectorySchemaExtension>>(jsonresult);
but I got this 但我明白了
Cannot deserialize the current JSON object (eg {"name":"value"}) into type 'System.Collections.Generic.List`1[CapatechSaasApp.Areas.GlobalAdmin.Models.ActiveDirectorySchemaExtension]' because the type requires a JSON array (eg [1,2,3]) to deserialize correctly. 无法反序列化当前JSON对象(例如{“ name”:“ value”})为类型'System.Collections.Generic.List`1 [CapatechSaasApp.Areas.GlobalAdmin.Models.ActiveDirectorySchemaExtension]',因为该类型需要JSON数组(例如[1,2,3])以正确反序列化。 To fix this error either change the JSON to a JSON array (eg [1,2,3]) or change the deserialized type so that it is a normal .NET type (eg not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. 要解决此错误,可以将JSON更改为JSON数组(例如[1,2,3]),也可以更改反序列化类型,使其成为普通的.NET类型(例如,不像整数这样的原始类型,也不像这样的集合类型。数组或列表),可以从JSON对象反序列化。 JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object. 还可以将JsonObjectAttribute添加到类型中,以强制其从JSON对象反序列化。 Path '['odata.metadata']', line 1, position 18. 路径'['odata.metadata']',第1行,位置18。
You can use DataContractSerializer 您可以使用DataContractSerializer
var serializer = new DataContractJsonSerializer(typeof(RootObject));
var ms = new MemoryStream(Encoding.Unicode.GetBytes(json));
var root = serializer.ReadObject(ms) as RootObject;
But also you should mark your classes with [DataContract] attribute and members with [DataMember] attribute. 但是,您还应该使用[DataContract]属性标记类,并使用[DataMember]属性标记成员。
Like this: 像这样:
[DataContract]
public class RootObject
{
[DataMember(Name = "odata.metadata")]
public string metadata { get; set; }
[DataMember]
public List<ActiveDirectorySchemaExtension> value { get; set; }
}
Also, you've lost one field in your class ActiveDirectorySchemaExtension - odataType. 同样,您在类ActiveDirectorySchemaExtension-odataType中丢失了一个字段。 You can deserialize it like this: 您可以像这样反序列化:
[DataMember(Name = "odata.type")]
public string odataType { get; set; }
You forgot your parent object in json2csharp. 您在json2csharp中忘记了父对象。
Demo on .NETFiddle .NETFiddle上的演示
using System;
using System.Collections.Generic;
using Newtonsoft.Json;
public class ActiveDirectorySchemaExtension // You can switch from the original class name to yours
{
public string Type { get; set; } // You should switch to PascalCase to respect C# notation
public string ObjectType { get; set; }
public string ObjectId { get; set; }
public object DeletionTimestamp { get; set; }
public string AppDisplayName { get; set; }
public string Name { get; set; }
public string DataType { get; set; }
public bool IsSyncedFromOnPremises { get; set; }
public List<string> TargetObjects { get; set; }
}
public class RootObject
{
public string Metadata { get; set; }
public List<ActiveDirectorySchemaExtension> Value { get; set; }
}
public void Main()
{
var json = "{'odata.metadata':'https://graph.windows.net/mysaasapp.onmicrosoft.com/$metadata#directoryObjects/Microsoft.DirectoryServices.ExtensionProperty','value':[{'odata.type':'Microsoft.DirectoryServices.ExtensionProperty','objectType':'ExtensionProperty','objectId':'f751a646-2cc1-4e30-bfc6-a8217c0ce0a3','deletionTimestamp':null,'appDisplayName':'','name':'extension_33e037a7b1aa42ab96936c22d01ca338_Modulos','dataType':'String','isSyncedFromOnPremises':false,'targetObjects':['User']},{'odata.type':'Microsoft.DirectoryServices.ExtensionProperty','objectType':'ExtensionProperty','objectId':'80aabe1b-b020-41d1-bd2d-cc04af264fe5','deletionTimestamp':null,'appDisplayName':'','name':'extension_33e037a7b1aa42ab96936c22d01ca338_ModulesPerUser','dataType':'String','isSyncedFromOnPremises':false,'targetObjects':['User']},{'odata.type':'Microsoft.DirectoryServices.ExtensionProperty','objectType':'ExtensionProperty','objectId':'6e3d7592-7a66-4792-b408-891251197868','deletionTimestamp':null,'appDisplayName':'','name':'extension_33e037a7b1aa42ab96936c22d01ca338_Comasdasa3dsdaspInfo','dataType':'String','isSyncedFromOnPremises':false,'targetObjects':['User']},{'odata.type':'Microsoft.DirectoryServices.ExtensionProperty','objectType':'ExtensionProperty','objectId':'93a26374-4135-4f29-9f24-4154522449ec','deletionTimestamp':null,'appDisplayName':'','name':'extension_33e037a7b1aa42ab96936c22d01ca338_CompInfo','dataType':'String','isSyncedFromOnPremises':false,'targetObjects':['User']},{'odata.type':'Microsoft.DirectoryServices.ExtensionProperty','objectType':'ExtensionProperty','objectId':'21a8a3d4-f4b4-45b4-8d07-55d450db35f2','deletionTimestamp':null,'appDisplayName':'','name':'extension_33e037a7b1aa42ab96936c22d01ca338_CompanyNameForSaasApp','dataType':'String','isSyncedFromOnPremises':false,'targetObjects':['User']},{'odata.type':'Microsoft.DirectoryServices.ExtensionProperty','objectType':'ExtensionProperty','objectId':'7b3109e0-8710-4d1a-81c3-2b6a83fb62ee','deletionTimestamp':null,'appDisplayName':'','name':'extension_33e037a7b1aa42ab96936c22d01ca338_Compania','dataType':'String','isSyncedFromOnPremises':false,'targetObjects':['User']}]}";
var o = JsonConvert.DeserializeObject<RootObject>(json);
Console.WriteLine(o.Value[0].Name);
}
output : 输出:
extension_33e037a7b1aa42ab96936c22d01ca338_Modulos
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