I am trying to fetch all Product where the CheckedOutToGuid is null or is the Guid of the current user. I have tried to use the following QueryOver:
public IEnumerable<IProduct> GetProducts(IUser user, Expression<Func<IProduct, bool>> predicate)
{
return Context.GetSession().QueryOver<Product>()
.Where(x => (x.CheckedOutByGuid == null) || Guid.Equals(user.UserGuid, x.CheckedOutByGuid)
.OrderBy(x => x.Version).Desc
.OrderBy(x => x.DisplayName).Asc.List();
}
but I get an error:
Atf.NUnit.Model.TestDatabase.TestModule1():
System.Exception : Unrecognised method call: System.Object:Boolean Equals(System.Object, System.Object)
What is the cause of this error? I tried removing (x.CheckedOutByGuid == null) so that no OR is necessary but still get the same error.
UPDATE
As #Andrew Whitakersugggested, I changed one line
.Where(x => (x.CheckedOutByGuid == null) || (user.UserGuid == x.CheckedOutByGuid))
This now causes the following exception:
Atf.NUnit.Model.TestDatabase.TestModule1():
NHibernate.QueryException : could not resolve property: user of: Atf.Model.Internal.Product
bei NHibernate.Persister.Entity.AbstractPropertyMapping.ToType(String propertyName) in p:\nhibernate-core\src\NHibernate\Persister\Entity\AbstractPropertyMapping.cs:Zeile 37.
bei NHibernate.Persister.Entity.AbstractEntityPersister.GetSubclassPropertyTableNumber(String propertyPath) in p:\nhibernate-core\src\NHibernate\Persister\Entity\AbstractEntityPersister.cs:Zeile 1776.
bei NHibernate.Persister.Entity.BasicEntityPropertyMapping.ToColumns(String alias, String propertyName) in p:\nhibernate-core\src\NHibernate\Persister\Entity\BasicEntityPropertyMapping.cs:Zeile 31.
bei NHibernate.Persister.Entity.AbstractEntityPersister.ToColumns(String alias, String propertyName) in p:\nhibernate-core\src\NHibernate\Persister\Entity\AbstractEntityPersister.cs:Zeile 1742.
bei NHibernate.Loader.Criteria.CriteriaQueryTranslator.GetColumns(ICriteria subcriteria, String propertyName) in p:\nhibernate-core\src\NHibernate\Loader\Criteria\CriteriaQueryTranslator.cs:Zeile 590.
bei NHibernate.Loader.Criteria.CriteriaQueryTranslator.GetColumnsUsingProjection(ICriteria subcriteria, String propertyName) in p:\nhibernate-core\src\NHibernate\Loader\Criteria\CriteriaQueryTranslator.cs:Zeile 561.
bei NHibernate.Criterion.CriterionUtil.GetColumnNamesUsingPropertyName(ICriteriaQuery criteriaQuery, ICriteria criteria, String propertyName) in p:\nhibernate-core\src\NHibernate\Criterion\CriterionUtil.cs:Zeile 64.
bei NHibernate.Criterion.CriterionUtil.GetColumnNames(String propertyName, IProjection projection, ICriteriaQuery criteriaQuery, ICriteria criteria, IDictionary`2 enabledFilters) in p:\nhibernate-core\src\NHibernate\Criterion\CriterionUtil.cs:Zeile 20.
bei NHibernate.Criterion.PropertyExpression.ToSqlString(ICriteria criteria, ICriteriaQuery criteriaQuery, IDictionary`2 enabledFilters) in p:\nhibernate-core\src\NHibernate\Criterion\PropertyExpression.cs:Zeile 74.
bei NHibernate.Criterion.LogicalExpression.ToSqlString(ICriteria criteria, ICriteriaQuery criteriaQuery, IDictionary`2 enabledFilters) in p:\nhibernate-core\src\NHibernate\Criterion\LogicalExpression.cs:Zeile 77.
bei NHibernate.Loader.Criteria.CriteriaQueryTranslator.GetWhereCondition(IDictionary`2 enabledFilters) in p:\nhibernate-core\src\NHibernate\Loader\Criteria\CriteriaQueryTranslator.cs:Zeile 202.
bei NHibernate.Loader.Criteria.CriteriaJoinWalker..ctor(IOuterJoinLoadable persister, CriteriaQueryTranslator translator, ISessionFactoryImplementor factory, ICriteria criteria, String rootEntityName, IDictionary`2 enabledFilters) in p:\nhibernate-core\src\NHibernate\Loader\Criteria\CriteriaJoinWalker.cs:Zeile 58.
bei NHibernate.Loader.Criteria.CriteriaLoader..ctor(IOuterJoinLoadable persister, ISessionFactoryImplementor factory, CriteriaImpl rootCriteria, String rootEntityName, IDictionary`2 enabledFilters) in p:\nhibernate-core\src\NHibernate\Loader\Criteria\CriteriaLoader.cs:Zeile 41.
bei NHibernate.Impl.SessionImpl.List(CriteriaImpl criteria, IList results) in p:\nhibernate-core\src\NHibernate\Impl\SessionImpl.cs:Zeile 1948.
bei NHibernate.Impl.CriteriaImpl.List(IList results) in p:\nhibernate-core\src\NHibernate\Impl\CriteriaImpl.cs:Zeile 265.
bei NHibernate.Impl.CriteriaImpl.List[T]() in p:\nhibernate-core\src\NHibernate\Impl\CriteriaImpl.cs:Zeile 276.
bei NHibernate.Criterion.QueryOver`1.List() in p:\nhibernate-core\src\NHibernate\Criterion\QueryOver.cs:Zeile 67.
bei NHibernate.Criterion.QueryOver`1.NHibernate.IQueryOver<TRoot>.List() in p:\nhibernate-core\src\NHibernate\Criterion\QueryOver.cs:Zeile 214.
bei Atf.Model.Database.DatabasePersistence.GetProducts(IUser user, Expression`1 predicate) in D:\my_workspaces\visualstudioprojects\MyTestFramework\Atf.Model\Database\DatabasePersistence.cs:Zeile 247.
bei Atf.NUnit.Model.TestDatabase.TestModule1() in D:\my_workspaces\visualstudioprojects\MyTestFramework\Atf.zNUnit.Model\TestDatabase.cs:Zeile 59.
Well, I then tried this:
public IEnumerable<IProduct> GetProducts(IUser user, Expression<Func<IProduct, bool>> predicate)
{
Guid g = user.UserGuid;
return Context.GetSession().QueryOver<Product>()
.Where(x => (x.CheckedOutByGuid == null) || (g == x.CheckedOutByGuid))
.OrderBy(x => x.Version).Desc
.OrderBy(x => x.DisplayName_DE).Asc.List();
}
and this is when I found that user is null :-( This was the cause of the error. The error messages led me in quite the wrong direction.
NHibernate is attempting to turn Guid.Equals into a SQL expression. NHibernate doesn't recognize Guid.Equals as something it can turn into SQL, hence the exception.
If you change that line to read:
.Where(x => (x.CheckedOutByGuid == null) || user.UserGuid == x.CheckedOutByGuid)
Everything should work fine.
Related
I just finished my ASP.NET hospital management app, everything works fine, but if I try to add a doctor I get this error:
System.InvalidOperationException HResult=0x80131509
Message=Sequence contains no elements
Source=Hospital Management System
StackTrace:
at Hospital_Management_System.Controllers.DoctorController.Index(String message) in C:\Users\mouha\OneDrive\Bureau\Hospital Management System\Hospital Management System\Controllers\DoctorController.cs:line 37
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.b__3d()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.<>c__DisplayClass46.b__3f()
The code:
public ActionResult Index(string message)
{
var date = DateTime.Now.Date;
ViewBag.Messege = message;
var user = User.Identity.GetUserId();
// The exception is being thrown here
var doctor = db.Doctors.Single(c => c.ApplicationUserId == user);
var model = new CollectionOfAll
{
Ambulances = db.Ambulances.ToList(),
Departments = db.Department.ToList(),
Doctors = db.Doctors.ToList(),
Patients = db.Patients.ToList(),
Medicines = db.Medicines.ToList(),
ActiveAppointments = db.Appointments.Where(c => c.DoctorId == doctor.Id).Where(c => c.Status).Where(c => c.AppointmentDate >= date).ToList(),
PendingAppointments = db.Appointments.Where(c => c.DoctorId == doctor.Id).Where(c => c.Status == false).Where(c => c.AppointmentDate >= date).ToList(),
AmbulanceDrivers = db.AmbulanceDrivers.ToList(),
Announcements = db.Announcements.Where(c => c.AnnouncementFor == "Doctor").ToList()
};
return View(model);
}
I have a SQL Server stored procedure that is used for uploading a document and returns an ID upon success.
I am storing the parameter file_data into a byte[] type in the Customer_Document_ADD class.
public byte[] file_data { get; set; }
The following is my repository code.
public async Task<int> InsertCustomer_Document_ADDResult(Customer_Document_ADD customer_Document_ADDED)
{
await using(SqlConnection connection = new SqlConnection(_connectionString))
{
connection.Open();
// define SqlParameters for the other two params to be passed
var company_idParam = new SqlParameter("#company_id", customer_Document_ADDED.company_id);
var customer_idParam = new SqlParameter("#customer_id", customer_Document_ADDED.customer_id);
var customer_site_idParam = new SqlParameter("#customer_site_id", customer_Document_ADDED.customer_site_id);
var customer_system_idParam = new SqlParameter("#customer_system_id", customer_Document_ADDED.customer_system_id);
var job_idParam = new SqlParameter("#job_id", customer_Document_ADDED.job_id);
var security_levelParam = new SqlParameter("#security_level", customer_Document_ADDED.security_level);
var file_nameParam = new SqlParameter("#file_name", customer_Document_ADDED.file_name);
var file_sizeParam = new SqlParameter("#file_size", customer_Document_ADDED.file_size);
var upload_dateParam = new SqlParameter("#upload_date", customer_Document_ADDED.upload_date);
var document_extParam = new SqlParameter("#document_ext", customer_Document_ADDED.document_ext);
var user_codeParam = new SqlParameter("#user_code", customer_Document_ADDED.user_code);
var user_descriptionParam = new SqlParameter("#user_description", customer_Document_ADDED.user_description);
var reference1Param = new SqlParameter("#reference1", customer_Document_ADDED.reference1);
var reference2Param = new SqlParameter("#reference2", customer_Document_ADDED.reference2);
var reference3Param = new SqlParameter("#reference3", customer_Document_ADDED.reference3);
var reference4Param = new SqlParameter("#reference4", customer_Document_ADDED.reference4);
var file_dataParam = new SqlParameter("#file_data", customer_Document_ADDED.file_data);
//if (file_dataParam.Value == null)
//{
// file_dataParam.Value = "";
//}
file_dataParam.SqlDbType = SqlDbType.Image;
// define the output parameter that needs to be retained
// for the Id created when the Stored Procedure executes
// the INSERT command
var document_idParam = new SqlParameter("#document_id", SqlDbType.Int);
// the direction defines what kind of parameter we're passing
// it can be one of:
// Input
// Output
// InputOutput -- which does pass a value to Stored Procedure and retains a new state
document_idParam.Direction = ParameterDirection.Output;
// we can also use context.Database.ExecuteSqlCommand() or awaitable ExecuteSqlCommandAsync()
// which also produces the same result - but the method is now marked obselete
// so we use ExecuteSqlRawAsync() instead
// we're using the awaitable version since GetOrCreateUserAsync() method is marked async
await context.Database.ExecuteSqlRawAsync(
"EXECUTE [dbo].[Customer_Document_ADD_incentive] #company_id, #customer_id, #customer_site_id, #customer_system_id, #job_id, #security_level, #file_name, #file_size, #upload_date, #document_ext, #user_code, #user_description, #reference1, #reference2, #reference3, #reference4, #file_data, #document_id out",
company_idParam,
customer_idParam,
customer_site_idParam,
customer_system_idParam,
job_idParam,
security_levelParam,
file_nameParam,
file_sizeParam,
upload_dateParam,
document_extParam,
user_codeParam,
user_descriptionParam,
reference1Param,
reference2Param,
reference3Param,
reference4Param,
file_dataParam,
document_idParam);
// the userIdParam which represents the Output param
// now holds the Id of the new user and is an Object type
// so we convert it to an Integer and send
return Convert.ToInt32(document_idParam.Value);
}
}
I'm getting the following error in Postman.
Microsoft.Data.SqlClient.SqlException (0x80131904): The parameterized query '(#company_id int,#customer_id int,#customer_site_id int,#custome' expects the parameter '#file_data', which was not supplied.
at Microsoft.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at Microsoft.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at Microsoft.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
at Microsoft.Data.SqlClient.SqlCommand.CompleteAsyncExecuteReader(Boolean isInternal, Boolean forDescribeParameterEncryption)
at Microsoft.Data.SqlClient.SqlCommand.InternalEndExecuteNonQuery(IAsyncResult asyncResult, Boolean isInternal, String endMethod)
at Microsoft.Data.SqlClient.SqlCommand.EndExecuteNonQueryInternal(IAsyncResult asyncResult)
at Microsoft.Data.SqlClient.SqlCommand.EndExecuteNonQueryAsync(IAsyncResult asyncResult)
at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteNonQueryAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteNonQueryAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteNonQueryAsync(RelationalCommandParameterObject parameterObject, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.ExecuteSqlRawAsync(DatabaseFacade databaseFacade, String sql, IEnumerable`1 parameters, CancellationToken cancellationToken)
at WebAPI.Repository.Customer_Document_ADDRepository.InsertCustomer_Document_ADDResult(Customer_Document_ADD customer_Document_ADDED) in C:\Users\CStith\source\code\project\WebAPI\WebAPI\Repository\Customer_Document_ADDRepository.cs:line 73
at WebAPI.Repository.Customer_Document_ADDRepository.InsertCustomer_Document_ADDResult(Customer_Document_ADD customer_Document_ADDED) in C:\Users\CStith\source\code\project\WebAPI\WebAPI\Repository\Customer_Document_ADDRepository.cs:line 97
at WebAPI.Controllers.Customer_Document_ADDController.InsertCustomer_Document_ADDResult(Customer_Document_ADD customer_Document_ADDED) in C:\Users\CStith\source\code\project\WebAPI\WebAPI\Controllers\Customer_Document_ADDController.cs:line 38
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
ClientConnectionId:e8f735f0-1ab5-4d53-9ead-01df3ee63c2e
Error Number:8178,State:1,Class:16
All other values are captured except the file. I am getting a null value in the debugger. Why am I unable to upload a file into the database? Thanks in advance.
Firstly,default model binding system cannot bind file to byte[] properties.If you want to bind file to btye[],you can use ByteArrayModelBinder,here is an official link.
Also,if you don't mind to change the type of file_data,you can use
public IFormFile file_data { get; set; }
and then you can convert it to byte[] type with MemoryStream.Here is an official link about upload files in .net core.
I'm creating a web application for the parish in angular.
It is a CRUD web application in which I use SQL Server.
I have the product-list.component page where I created the OnDelete method to be able to delete the single product.
The method is correct, but I have a problem that in the table there are relations to the "CommandRighe" table that inhibit deletion.
I modified the OnDelete method with try catch to be able to intercept the error code and send an error message to the user.
It does not work and I would like to know how to handle the problem in order to send the user an error message telling him that the record cannot be deleted.
How can I do ?
thank you
Moreno
System.Data.Entity.Infrastructure.DbUpdateException non è stata gestita dal codice utente
HResult=-2146233087
Message=Errore durante l'aggiornamento delle voci. Per ulteriori dettagli, vedere l'eccezione interna.
Source=EntityFramework
StackTrace:
in System.Data.Entity.Internal.InternalContext.SaveChanges()
in System.Data.Entity.Internal.LazyInternalContext.SaveChanges()
in System.Data.Entity.DbContext.SaveChanges()
in WebApiSif.Controllers.PRODOTTIController.DeletePRODOTTI(Int32 id) in I:\Angular Project\SifWork\WebApiSif\WebApiSif\Controllers\PRODOTTIController.cs:riga 162
in lambda_method(Closure , Object , Object[] )
in System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass6_2.<GetExecutor>b__2(Object instance, Object[] methodParameters)
in System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
in System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
InnerException:
HResult=-2146233087
Message=Errore durante l'aggiornamento delle voci. Per ulteriori dettagli, vedere l'eccezione interna.
Source=EntityFramework
StackTrace:
in System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()
in System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.<Update>b__2(UpdateTranslator ut)
in System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update[T](T noChangesResult, Func`2 updateFunction)
in System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update()
in System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStore>b__35()
in System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
in System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction)
in System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass2a.<SaveChangesInternal>b__27()
in System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
in System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction)
in System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options)
in System.Data.Entity.Internal.InternalContext.SaveChanges()
InnerException:
Class=16
ErrorCode=-2146232060
HResult=-2146232060
LineNumber=1
Message=L'istruzione DELETE è in conflitto con il vincolo REFERENCE "FK_CommandaRighe_PRODOTTI". Il conflitto si è verificato nella tabella "dbo.CommandaRighe", column 'NProdotto' del database "SifDB".
L'istruzione è stata interrotta.
Number=547
Procedure=""
Server=DESKTOP-P3TEF6K\SQLEXPRESS
Source=.Net SqlClient Data Provider
State=0
StackTrace:
in System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
in System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
in System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
in System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
in System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
in System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
in System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
in System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
in System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
in System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<NonQuery>b__0(DbCommand t, DbCommandInterceptionContext`1 c)
in System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
in System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand command, DbCommandInterceptionContext interceptionContext)
in System.Data.Entity.Internal.InterceptableDbCommand.ExecuteNonQuery()
in System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.Execute(Dictionary`2 identifierValues, List`1 generatedValues)
in System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update()
InnerException:
Message = The DELETE statement conflicts with the REFERENCE constraint "FK_CommandaRighe_PRODOTTI". The conflict occurred in the "dbo.CommandaRighe" table, column 'NProduct' of the "SifDB" database.
The instruction has been interrupted.
onDelete(id: number) {
if (confirm('Confermi la cancellazione del Record ?')) {
try {
this.service.deleteProdotti(id).then(res => { // this.service.deleteProdotti(id).subscribe(res => {
this.service.refreshList();
this.toastr.warning('Cancellazione eseguita con successo', Header_Msg);
});
} catch (error) {
console.error('errore in cancellazione: ' + error);
}
}
}
-----------------------------------------
the overall class is as follows
import {Component, OnInit, SystemJsNgModuleLoader} from '# angular / core';
import {Products} from 'src / app / model / prodotti.model';
import {ProductsListService} from 'src / app / features / products / components / products-list / products-list.service';
import {ToastrService} from 'ngx-toastr';
let Header_Msg = "Product Manager";
#Component ({
selector: 'app-products-list',
templateUrl: './products-list.component.html',
styleUrls: ['./products-list.component.css']
})
export class ProductsListComponent implements OnInit {
constructor (private service: ProductsListService, private toastr: ToastrService) {
}
ngOnInit () {
this.service.refreshList ();
}
populateForm (emp: Products) {
this.service.formData = Object.assign ({}, emp);
}
onDelete (id: number) {
if (confirm ('Confirm the deletion of the record?')) {
try {
this.service.deleteProducts (id) .then (res => {// this.service.deleteProdotti (id) .subscribe (res => {
this.service.refreshList ();
this.toastr.warning ('Successful deletion', Header_Msg);
});
} catch (error) {
console.error ('error in deletion:' + error);
}
}
}
}`enter code here`
First, I would like to tell that i am new on the .net development (MVC 4)
and I am trying to follow this tutorial with entity framework 5 but I keep getting this error " exception of type 'System.NullReferenceException' occurred in jqGridMVC2.dll but was not handled in user code
Additional information: Object reference not set to an instance of an object.
, even though i tried to cheeck the value for null before.
if(propInfo.GetValue(this, null) != null) {
}
private static object GetPropertyValue(object obj, string property)
{
System.Reflection.PropertyInfo propertyInfo = obj.GetType().GetProperty(property);
// if (obj != null)
// if (propertyInfo.GetValue(obj, null) != null)
return propertyInfo.GetValue(obj, null);
// return 0;
}
at jqGridMVC2.Extensions.GridExtension.GetPropertyValue(Object obj, String property) in c:\Users\aal\Documents\Visual Studio 2013\Projects\jqGridMVC2\jqGridMVC2\Extensions\Grid\GridExtension.cs:line 70
at jqGridMVC2.Extensions.GridExtension.<>c__DisplayClass4`1.<AsJqGridResult>b__2(T item) in c:\Users\aal\Documents\Visual Studio 2013\Projects\jqGridMVC2\jqGridMVC2\Extensions\Grid\GridExtension.cs:line 38
at System.Linq.EnumerableSorter`2.ComputeKeys(TElement[] elements, Int32 count)
at System.Linq.EnumerableSorter`1.Sort(TElement[] elements, Int32 count)
at System.Linq.OrderedEnumerable`1.<GetEnumerator>d__0.MoveNext()
at System.Linq.Enumerable.<SkipIterator>d__4d`1.MoveNext()
at System.Linq.Enumerable.<TakeIterator>d__3a`1.MoveNext()
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at jqGridMVC2.Extensions.GridExtension.AsJqGridResult[T](IQueryable`1 source, String column, String sortOrder, Int32 page, Int32 pageSize) in c:\Users\aal\Documents\Visual Studio 2013\Projects\jqGridMVC2\jqGridMVC2\Extensions\Grid\GridExtension.cs:line 41
at jqGridMVC2.Controllers.HomeController.DynamicGridData(String sidx, String sord, Int32 page, Int32 rows) in c:\Users\aal\Documents\Visual Studio 2013\Projects\jqGridMVC2\jqGridMVC2\Controllers\HomeController.cs:line 30
at lambda_method(Closure , ControllerBase , Object[] )
at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41()
at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _)
at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33()
at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49()
Please help me in solving this problem
Thank you in advance.
I just solve the error by this
private static object GetPropertyValue(object obj, string property)
{
foreach (var property1 in obj.GetType().GetProperties()) {
return property1.GetValue(obj, null); //throws exception TargetParameterCountException for String type
}
return 0;
}
I am calling this from a silverlight app:
// docs at: http://developers.facebook.com/docs/reference/api/post
var client = new FacebookClient(_token);
dynamic parameters = new ExpandoObject();
parameters.message = title;
parameters.link = linkUrl;
parameters.picture = imageUrl;
parameters.name = name;
parameters.caption = promptTitle;
parameters.description = description;
parameters.privacy = new
{
value = "ALL_FRIENDS",
};
client.PostAsync("me/feed", parameters);
This generates the following error:
Attempt by security transparent method 'SimpleJson.Reflection.CacheResolver.CreateDynamicMethod(System.String, System.Type, System.Type[], System.Type)' to access security critical method 'System.Reflection.Emit.DynamicMethod..ctor(System.String, System.Type, System.Type[], System.Type, Boolean)' failed.
-- more: --
{System.MethodAccessException: Attempt by security transparent method 'SimpleJson.Reflection.CacheResolver.CreateDynamicMethod(System.String, System.Type, System.Type[], System.Type)' to access security critical method 'System.Reflection.Emit.DynamicMethod..ctor(System.String, System.Type, System.Type[], System.Type, Boolean)' failed.
at SimpleJson.Reflection.CacheResolver.CreateDynamicMethod(String name, Type returnType, Type[] parameterTypes, Type owner)
at SimpleJson.Reflection.CacheResolver.CreateGetHandler(PropertyInfo propertyInfo)
at SimpleJson.Reflection.CacheResolver.MemberMap..ctor(PropertyInfo propertyInfo)
at SimpleJson.PocoJsonSerializerStrategy.BuildMap(Type type, SafeDictionary2 memberMaps)
at SimpleJson.DataContractJsonSerializerStrategy.BuildMap(Type type, SafeDictionary2 map)
at SimpleJson.Reflection.CacheResolver.LoadMaps(Type type)
at SimpleJson.PocoJsonSerializerStrategy.TrySerializeUnknownTypes(Object input, Object& output)
at SimpleJson.PocoJsonSerializerStrategy.SerializeNonPrimitiveObject(Object input, Object& output)
at SimpleJson.SimpleJson.SerializeValue(IJsonSerializerStrategy jsonSerializerStrategy, Object value, StringBuilder builder)
at SimpleJson.SimpleJson.SerializeObject(Object json, IJsonSerializerStrategy jsonSerializerStrategy)
at SimpleJson.SimpleJson.SerializeObject(Object json)
at Facebook.JsonSerializer.SimpleJsonSerializer.SerializeObject(Object obj)
at Facebook.FacebookUtils.ToJsonQueryString(IDictionary2 dictionary)
at Facebook.FacebookClient.BuildRequestData(Uri uri, IDictionary2 parameters, HttpMethod httpMethod, Uri& requestUrl, String& contentType)
at Facebook.FacebookClient.BuildRequestData(String path, IDictionary2 parameters, HttpMethod method, Uri& requestUrl, String& contentType)
at Facebook.FacebookClient.ApiAsync(String path, IDictionary2 parameters, HttpMethod httpMethod, Object userToken)
at Facebook.FacebookClient.PostAsync(String path, IDictionary2 parameters, Object userToken)
at Facebook.FacebookClient.PostAsync(String path, IDictionary2 parameters)
at CallSite.Target(Closure , CallSite , FacebookClient , String , Object )
at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid3[T0,T1,T2](CallSite site, T0 arg0, T1 arg1, T2 arg2)
was a bug with the sdk at that time. has been fixed since.