500错误将Api置于抖动https调用中

问题描述

这是我第一次调用put API时遇到的麻烦。我正在尝试通过使用https的API来更新配置文件。 该API在邮递员中正常运行，但在模拟器内部，它返回错误代码500。我还在标题中添加了内容类型：“ application / json”。 请帮助我解决问题。

    class ProfileRepo {
      static const API = 'https://ramu.sdaemon.com/api/';
    
    //Customer/PuttblMstCustomer
      Future<ProfileModelResponse> putProfile(
          ProfileModelRequest profileModelRequest) async {
        print(profileModelRequest);
        log('data : ${profileModelRequest.toString()}');
    
    
        var requestEncoded = jsonEncode(profileModelRequest);
        var jsonvalue = jsonEncode({
      "CustomerID": 12,"FirstName": "Akshay","LastName": "","CompanyID": "","HomeAddress": "","OfficeAddress": "","FromOfficeTime": "","ToOfficeTime": "","City": "","CountryID": "","PostalCode": "","PhoneNo": "8805078548","AlternativePhoneNo": "","Birthdate": "","Email": "","AddedBy": "","AddedOn": "","ModifiedBy": "","ModifiedOn": "","CompanyName": "","CountryName": ""
    });
    final result = await http.Client().put(API + 'Customer/PuttblMstCustomer/',body: jsonvalue,headers: {
          "Accept": "application/json","Content-Type": "application/json"
        });
    
        log(result.body.toString());
        print(result.body.toString());
    
        if (result.statusCode != 200){
    /*      Fluttertoast.showToast(
              msg: "API fail",toastLength: Toast.LENGTH_SHORT,gravity: ToastGravity.CENTER,timeInSecForIosWeb: 1,backgroundColor: Colors.red,textColor: Colors.white,fontSize: 16.0);*/
          throw Exception();
        }else{
          Fluttertoast.showToast(
              msg: "API Success",fontSize: 16.0);
        }
    
        return parsedJson(result.body);
      }
    
    
      ProfileModelResponse parsedJson(final response){
        final jsonDecoded = jsonDecode(response);
        return ProfileModelResponse.fromJson(jsonDecoded);
      }
    }

print(result.body.toString())在下面给出了输出

{"Message":"An error has occurred.","ExceptionMessage":"Store update,insert,or delete
     statement affected an unexpected number of rows (0). Entities may have been modified or
     deleted since entities were loaded. See http://go.microsoft.com/fwlink/?LinkId=472540 for
     @R_186_4045@ion on understanding and handling optimistic concurrency exceptions.","ExceptionType":"System.Data.Entity.Infrastructure.dbupdateConcurrencyException","StackTrace":"   at System.Data.Entity.Internal.InternalContext.SaveChanges()\r\n   at
     System.Data.Entity.Internal.LazyInternalContext.SaveChanges()\r\n   at
     System.Data.Entity.DbContext.SaveChanges()\r\n   at
     BusinessLogic.Models.CommonClasses.ClsCustomer.Edit(tblMstCustomer customer) in
     D:\\Sdaemon\\EcommerceCRM\\BusinessLogic\\Models\\CommonClasses\\ClsCustomer.cs:line 99\r\n  
     at EcommerceCRMAPI.Controllers.CustomerController.PuttblMstCustomer(tblMstCustomer Customer)
     in D:\\Sdaemon\\EcommerceCRM\\EcommerceCRMAPI\\Controllers\\CustomerController.cs:line
     105\r\n   at lambda_method(Closure,Object,Object[] )\r\n   at
     System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor
    .<>c__displayClass6_1.<GetExecutor>b__3(Object instance,Object[] methodParameters)\r\n   at
     System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object
     instance,Object[] arguments)\r\n   at
     System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext
     controllerContext,IDictionary`2 arguments,CancellationToken cancellationToken)\r\n--- End
     of stack trace from prevIoUs location where exception was thrown ---\r\n   at
     System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at
     System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
     task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker
    .<InvokeActionAsyncCore>d__1.MoveNext()\r\n--- End of stack trace from prevIoUs location where
     exception was thrown ---\r\n   at 
    System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at
     System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
     task)\r\n   at System.Web.Http.Controllers.ActionFilterResult
    .<ExecuteAsync>d__5.MoveNext()\r\n--- End of stack trace from prevIoUs location where
     exception was thrown ---\r\n   at
     System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at
     System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
     task)\r\n   at System.Web.Http.Controllers.AuthenticationFilterResult
    .<ExecuteAsync>d__5.MoveNext()\r\n--- End of stack trace from prevIoUs location where
     exception was thrown ---\r\n   at
     System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at
     System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
     task)\r\n   at System.Web.Http.dispatcher.HttpControllerdispatcher
    .<SendAsync>d__15.MoveNext()","InnerException":{"Message":"An error has
     occurred.",or delete statement affected an
     unexpected number of rows (0). Entities may have been modified or deleted since entities were
     loaded. See http://go.microsoft.com/fwlink/?LinkId=472540 for @R_186_4045@ion on understanding
     and handling optimistic concurrency exceptions.","ExceptionType":"System.Data.Entity.Core.OptimisticConcurrencyException","StackT
    race":"   at
     System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.ValidateRowsAffected(Int64
     rowsAffected,UpdateCommand source)\r\n   at
     System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()\r\n   at
     System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.<Update>b__2(UpdateTranslator
     ut)\r\n   at System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update[T](T
     noChangesResult,Func`2 updateFunction)\r\n   at
     System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update()\r\n   at
     System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStore>b__35()\r\n   at
     System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func,IDbExecutionStrategy executionStrategy,Boolean startLocalTransaction,Boolean
     releaseConnectionOnSuccess)\r\n   at
     System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options,Boolean startLocalTransaction)\r\n   at
     System.Data.Entity.Core.Objects.ObjectContext.<>c__displayClass2a
    .<SaveChangesInternal>b__27()\r\n   at
     System.Data.Entity.sqlServer.DefaultsqlExecutionStrategy.Execute[TResult](Func`1
     operation)\r\n   at
     System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options,Boolean executeInExistingTransaction)\r\n   at
     System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options)\r\n   at
     System.Data.Entity.Internal.InternalContext.SaveChanges()"}}

解决方法

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