问题
I am creating a sample for a talk: using Office 365 in Xamarin.Android, but I am having some errors, don´t know why :/
I got this:
"System.InvalidOperationException: An error occurred while processing this request. --->
Microsoft.OData.Client.DataServiceTransportException: Error: NameResolutionFailure --->
System.Net.WebException: Error: NameResolutionFailure\n
at System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n at Microsoft.OData.Client.HttpWebRequestMessage.EndGetResponse (IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n --- End of inner exception stack trace ---\n
at Microsoft.OData.Client.HttpWebRequestMessage.EndGetResponse (IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n at Microsoft.OData.Client.ODataRequestMessageWrapper.EndGetResponse (IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n at Microsoft.OData.Client.DataServiceContext.GetResponseHelper (Microsoft.OData.Client.ODataRequestMessageWrapper request, IAsyncResult asyncResult, Boolean handleWebException) [0x00000]
in <filename unknown>:0 \n --- End of inner exception stack trace ---\n
at Microsoft.OData.Client.BaseAsyncResult.EndExecute[QueryResult] (System.Object source, System.String method, IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n at Microsoft.OData.Client.QueryResult.EndExecuteQuery[Contact] (System.Object source, System.String method, IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n--- End of stack trace from previous location where exception was thrown ---\n
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 \n
at System.Runtime.CompilerServices.TaskAwaiter`1[Microsoft.Office365.Exchange.Extensions.IPagedEnumerable`1[Microsoft.Office365.Exchange.IContact]].GetResult () [0x00000]
in <filename unknown>:0 \n at Microsoft.Office365.Exchange.Extensions.DataServiceContextWrapper+<ExecuteAsync>d__2d`2[Microsoft.Office365.Exchange.Contact,Microsoft.Office365.Exchange.IContact].MoveNext () [0x00000]
in <filename unknown>:0 \n--- End of stack trace from previous location where exception was thrown ---\n
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000]
in <filename unknown>:0 \n at System.Runtime.CompilerServices.TaskAwaiter`1[Microsoft.Office365.Exchange.Extensions.IPagedEnumerable`1[Microsoft.Office365.Exchange.IContact]].GetResult () [0x00000] in <filename unknown>:0 \n at Office365InXamarinApps.ViewModel.ContactsViewModel+<GetContacts>d__3.MoveNext () [0x000b5] in d:\\DevApps\\GitHub\\Office365InXamarinApps\\scr\\Office365InXamarinApps\\Office365InXamarinApps\\ViewModel\\ContactsViewModel.cs:44 \n--- End of stack trace from previous location where exception was thrown ---\n
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000]
in <filename unknown>:0 \n at System.Runtime.CompilerServices.TaskAwaiter`1[System.Collections.Generic.IEnumerable`1[Microsoft.Office365.Exchange.IContact]].GetResult () [0x00000]
in <filename unknown>:0 \n at Office365InXamarinApps.ViewModel.ContactsViewModel+<LoadData>d__0.MoveNext () [0x00030]
in d:\\DevApps\\GitHub\\Office365InXamarinApps\\scr\\Office365InXamarinApps\\Office365InXamarinApps\\ViewModel\\ContactsViewModel.cs:25 " string
and this
"Microsoft.OData.Core.ODataErrorException: Object reference not set to an instance of an object.
---> Microsoft.OData.Client.DataServiceQueryException: An error occurred while processing this request.
---> Microsoft.OData.Client.DataServiceClientException: {\"error\":{\"code\":\"ErrorInternalServerError\",\"message\":\"Object reference not set to an instance of an object.\",\"innererror\":{\"message\":\"Object reference not set to an instance of an object.\",\"type\":\"System.NullReferenceException\",\"stacktrace\":\"
at Microsoft.Exchange.Services.OData.Model.ContactSchema.<.cctor>b__2c(Entity e, PropertyDefinition ep, ServiceObject s, PropertyInformation sp)\\r\\n
at Microsoft.Exchange.Services.OData.Model.SimpleEwsPropertyProvider.GetProperty(Entity entity, PropertyDefinition property, ServiceObject ewsObject)\\r\\n
at Microsoft.Exchange.Services.OData.Model.ContactProvider.ItemTypeToEntity(ItemType itemType, IList`1 properties)\\r\\n
at Microsoft.Exchange.Services.OData.Model.ContactProvider.Find(String parentFolderId, ContactQueryAdapter queryAdapter)\\r\\n
at Microsoft.Exchange.Services.OData.Model.FindContactsCommand.InternalExecute()\\r\\n
at Microsoft.Exchange.Services.OData.ODataCommand`2.Execute()\\r\\n
at Microsoft.Exchange.Services.OData.ODataTask.Execute(TimeSpan queueAndDelayTime, TimeSpan totalTime)\"}}}\n
at Microsoft.OData.Client.BaseAsyncResult.EndExecute[QueryResult] (System.Object source, System.String method, IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n at Microsoft.OData.Client.QueryResult.EndExecuteQuery[Contact] (System.Object source, System.String method, IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n --- End of inner exception stack trace ---\n
at Microsoft.OData.Client.QueryResult.EndExecuteQuery[Contact] (System.Object source, System.String method, IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n at Microsoft.OData.Client.DataServiceRequest.EndExecute[Contact] (System.Object source, Microsoft.OData.Client.DataServiceContext context, System.String method, IAsyncResult asyncResult) [0x00000]
in <filename unknown>:0 \n--- End of stack trace from previous location where exception was thrown ---\n
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 \n at System.Runtime.CompilerServices.TaskAwaiter`1[Microsoft.Office365.Exchange.Extensions.IPagedEnumerable`1[Microsoft.Office365.Exchange.IContact]].GetResult () [0x00000] in <filename unknown>:0 \n
at Microsoft.Office365.Exchange.Extensions.DataServiceContextWrapper+<ExecuteAsync>d__2d`2[Microsoft.Office365.Exchange.Contact,Microsoft.Office365.Exchange.IContact].MoveNext () [0x00000] in <filename unknown>:0 \n --- End of inner exception stack trace ---\n
at Microsoft.Office365.Exchange.Extensions.DataServiceContextWrapper+<ExecuteAsync>d__2d`2[Microsoft.Office365.Exchange.Contact,Microsoft.Office365.Exchange.IContact].MoveNext () [0x00000]
in <filename unknown>:0 \n--- End of stack trace from previous location where exception was thrown ---\n
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 \n at System.Runtime.CompilerServices.TaskAwaiter`1[Microsoft.Office365.Exchange.Extensions.IPagedEnumerable`1[Microsoft.Office365.Exchange.IContact]].GetResult () [0x00000] in <filename unknown>:0 \n
at Office365InXamarinApps.ViewModel.ContactsViewModel+<GetContacts>d__4.MoveNext () [0x000d7] in d:\\DevApps\\GitHub\\Office365InXamarinApps\\scr\\Office365InXamarinApps\\Office365InXamarinApps\\ViewModel\\ContactsViewModel.cs:53 " string
The code is here: https://github.com/saramgsilva/Office365InXamarinApp
回答1:
The Office 365 API Preview has issues and I cannot use it, for this reason I created another demo using Office 365 REST API.
https://github.com/saramgsilva/Office365RESTAPISample
来源：https://stackoverflow.com/questions/24511469/using-office-365-api-in-xamarin-android