TypeLoadException: Kaedah 'Create' tidak ditemui dalam jenis 'MySql.Data.EntityFrameworkCore.Query.Internal.MySQLSqlTranslatingExpressionVisitorFactory'
Saya cuba menambah pengguna baharu pada pangkalan data menggunakan kod berikut:
public async void SeedUsers(){
int count=0;
if(count>0){
return;
}
else{
string email="jujusafadinha@outlook.com.br";
_context.Add(new User{LoginEmail=email});
await _context.SaveChangesAsync();
}
}
Tetapi ia terus memberi saya ralat berikut:
System.TypeLoadException: > Kaedah 'Buat' dalam jenis 'MySql.Data.EntityFrameworkCore.Query.Internal.MySQLSqlTranslatedExpressionVisitorFactory' dalam pemasangan 'MySql.Data.EntityFrameworkCore.Query.Internal.MySQLSqlTranslatedExpressionVisitorFactory' dalam pemasangan 'MySql.Data.EntityFrame. = c5687fc88969c44d ' Tidak dilaksanakan.
di MySql.Data.EntityFrameworkCore.Extensions.MySQLServiceCollectionExtensions.AddEntityFrameworkMySQL(IServ>iceCollection service)
di MySql.Data.EntityFrameworkCore.Infrastruct.Internal.MySQLOptionsExtension.ApplyServices(perkhidmatan IServiceColle>ction)
di Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.ApplyServices(IDbContextOptions > Options, ServiceCollection Services)
di Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.c__DisplayClass4_0.b__2(Int64 k)
dalam System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory)
di Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.GetOrAdd(Pilihan IDbContextOptions, >Pembekal BooleanDiperlukan)
di Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
di Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependency()
di Microsoft.EntityFrameworkCore.DbContext.EntryWithoutDetectChanges[TEntity](Tentity entiti)
di Microsoft.EntityFrameworkCore.DbContext.SetEntityState[TEntity](Tentity entiti, EntityState >entityState)
di Microsoft.EntityFrameworkCore.DbContext.Add[TEntity](Tentity entiti)
Dalam D:devcontatinapiDataSeedData.cs di contatinApi.Data.SeedData.SeedUsers(): baris 24
di System.Threading.Tasks.Task.<>c.b__139_1(ObjectState)
di System.Threading.QueueUserWorkItemCallback.<>c.<.cctor>b__6_0(QueueUserWorkItemCallback quwi)
di System.Threading.ExecutionContext.RunForThreadPoolUnsafe[TSate](ExecutionContext >executionContext, Action`1 callback, TState& state)
dalam System.Threading.QueueUserWorkItemCallback.Execute()
dalam System.Threading.ThreadPoolWorkQueue.Dispatch()
Dalam System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
Kelas pengguna:
public class User
{
public int Id{get;set;}
public string LoginEmail{get;set;}
public string UserName{get;set;}
public DateTime CreatedAt{get;set;}
public List<Contact> Contacts {get;set;}
public List<ContactList> ContactLists{get;set;}
}
Pakej EF Core dan MySQL telah dikemas kini. Juga, saya cuba menggunakan prosedur tersimpan dan ia memberikan hasil yang sama.
Kandungan
Cth ialah:
Nilai Ex ialah {System.TypeLoadException: Kaedah "Create" dalam jenis "MySql.Data.EntityFrameworkCore.Query.Internal.MySQLSqlTranslatedExpressionVisitorFactory" dalam perhimpunan "MySql.Data.EntityFrameworkCore.2.80.PublicityFrameworkCore", version2.80.0 culture. =c5687fc88969c44d' tidak dilaksanakan.
di MySql.Data.EntityFrameworkCore.Extensions.MySQLServiceCollectionExtensions.AddEntityFrameworkMySQL(IServiceCollection service)
di MySql.Data.EntityFrameworkCore.Infrastruct.Internal.MySQLOptionsExtension.ApplyServices(perkhidmatan IServiceCollection)
di Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.ApplyServices(pilihan IDbContextOptions, perkhidmatan ServiceCollection)
di Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.<>c__DisplayClass4_0.g__BuildServiceProvider|3()
di Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.<>c__DisplayClass4_0.b__2(Int64 k)
dalam System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd(TKey key, Func2 valueFactory)
di Microsoft.EntityFrameworkCore.Internal.ServiceProviderCache.GetOrAdd(pilihan IDbContextOptions, Boolean providerRequired)
di Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
di Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependency()
di Microsoft.EntityFrameworkCore.DbContext.Microsoft.EntityFrameworkCore.Internal.IDbContextDependency.get_StateManager()
di Microsoft.EntityFrameworkCore.Internal.InternalDbSet1.EntryWithoutDetectChanges(TEntity 实体) 在 Microsoft.EntityFrameworkCore.Internal.InternalDbSet1.Add(Tentity entiti)
Di contatinApi.Data.SeedData.SeedUsers() dalam D:devContatinApiDataSeedData.cs: baris 40}
