我有一个这样的方法：它是BSN编号的列表。而且我需要有一个随机数。
.dll从这个数字列表中，我想从这个列表中获得一个随机数。
我这样尝试：
public virtual IQueryable<TEntity> GetAll()
{
return Repository.GetAll();
}
public IQueryable<TEntity> GetAll()
{
return _dbSet;
}
但这不起作用。
那么如何归档呢？
谢谢。
如果我这样做的话：
Random rnd2 = new Random();
var Banners = HelperManager.LeraarReposHelper.GetAll();//.Where(p =>
p.PersoonId != 1).OrderBy(x => Guid.NewGuid()).Take(3);
int index = rnd2.Next(0, Banners.Count() - 1);
Verwijzing = Banners.ToString()
我收到此错误：
var Banners = HelperManager.LeraarReposHelper.GetAll().Where(p => p.PersoonId != 1).OrderBy(x => Guid.NewGuid()).Take(1);
这是课程：
at System.Data.Entity.Internal.InternalContext.SaveChanges()
at System.Data.Entity.Internal.LazyInternalContext.SaveChanges()
at System.Data.Entity.DbContext.SaveChanges()
at VLR.TestData.Repository.UnitOfWork.SaveChanges() in E:\Projects\Source\Repos\EndToEndTest\VLR.TestData.Repository\UnitOfWork.cs:line 40
at VLR.TestData.Repository.Helpers.HelperBase`1.Insert(TEntity entity, Boolean autoSave) in E:\Projects\Source\Repos\EndToEndTest\VLR.TestData.Repository\Helpers\HelperBase.cs:line 103
at VLR.TestData.Repository.Helpers.DBHelpers.ZaakReposHelper.Insert(Zaak zaak, Boolean autoSave) in E:\Projects\Source\Repos\EndToEndTest\VLR.TestData.Repository\Helpers\DBHelpers\ZaakReposHelper.cs:line 42
at VLR.TestData.Generator.Processes.ZaakGenerator.CreateZaak() in E:\Projects\Source\Repos\EndToEndTest\VLR.TestData.Generator\Processes\ZaakGenerator.cs:line 72
at VLR.TestData.Generator.Tool.Processes.ZaakProcess.Generate(Int32 size) in E:\Projects\Source\Repos\EndToEndTest\VLR.TestData.Generator.Tool\Processes\ZaakProcess.cs:line 23
这是Leraar类。那么如何解决这个问题。
谢谢
这是课程：
public partial class Leraar : EntityBase
{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public Leraar()
{
this.Bevoegdheid = new HashSet<Bevoegdheid>();
this.DuoArbeidsovereenkomst = new HashSet<DuoArbeidsovereenkomst>();
this.LeraarActiefStatusLog = new HashSet<LeraarActiefStatusLog>();
this.Portfolio = new HashSet<Portfolio>();
this.Migraties = new HashSet<Migratie>();
this.AanbodDeelnemers = new HashSet<AanbodDeelnemer>();
this.LeraarSchools = new HashSet<LeraarSchool>();
this.PortfolioDoorsturen = new HashSet<PortfolioDoorsturen>();
Initialize();
}
partial void Initialize();
public int PersoonId { get; set; }
public int WizardStap { get; set; }
public Nullable<System.DateTime> RegistratieDatumUtc { get; set; }
public bool IsGeheim { get; set; }
public System.Guid LeraarGuid { get; set; }
public Nullable<System.DateTime> MigratieVoorwaardenAkkoordDatumUtc { get; set; }
public Nullable<System.Guid> RegisterleraarGebruikerId { get; set; }
public string RegisterleraarGebruikersnaam { get; set; }
public string RegisterNummer { get; set; }
public bool ToonMigratieMelding { get; set; }
public string Email { get; set; }
public Nullable<System.DateTime> VerklaringAkkoordDatumUtc { get; set; }
public Nullable<System.DateTime> AanmeldDatumUtc { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Bevoegdheid> Bevoegdheid { get; set; }
public virtual BrpPersoon BrpPersoon { get; set; }
public virtual DuoAdresBuitenland DuoAdresBuitenland { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<DuoArbeidsovereenkomst> DuoArbeidsovereenkomst { get; set; }
public virtual RegisterVoorportaalTermijn RegisterVoorportaalTermijn { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<LeraarActiefStatusLog> LeraarActiefStatusLog { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Portfolio> Portfolio { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Migratie> Migraties { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<AanbodDeelnemer> AanbodDeelnemers { get; set; }
public virtual LeraarBeheer LeraarBeheer { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<LeraarSchool> LeraarSchools { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<PortfolioDoorsturen> PortfolioDoorsturen { get; set; }
}
这是错误消息：
public class ZaakGenerator : DataGenerator
{
private BsnDataGenerator _bsnGenerator = new BsnDataGenerator();
public ZaakGenerator(UnitOfWork unitOfWork) : base(unitOfWork)
{
DateTime tomorrow = DateTime.Now;
var startDate = GetRandomDate(DateTime.Now.AddYears(-3), DateTime.Now.AddDays(-5));
var endDate = ProbabilityBool(80) ? null : (DateTime?)GetRandomDate(DateTime.Now.AddDays(-1), DateTime.Now.AddYears(2));
}
public Zaak CreateZaak()
{
ZaakNotitie NotitieZaak = CreateZaakNotitie();
ZaakHistorie zaakHistory = CreateZaakHistorie();
//int rnd = new Random();//.Next();
Random rnd2 = new Random();
var Banners = HelperManager.LeraarReposHelper.GetAll().Where(p => p.PersoonId != 1).OrderBy(x => Guid.NewGuid()).Take(1).ToList();
int index = rnd2.Next(0, Banners.Count() - 1);
int r = rnd2.Next(Banners.Count());
var numReviews = RandomNumber(1, 100);
var teachers = HelperManager.LeraarReposHelper.GetAll()
.OrderBy(t => Guid.NewGuid())
.Take(numReviews)
.Select(t => t.PersoonId)
.ToList();
DateTime datumBinnenkomst = GetRandomDate(DateTime.Now.AddMonths(-18), DateTime.Now);
var DatumAfgehandeld = ProbabilityBool(80) ? null : (DateTime?)GetRandomDate(DateTime.Now.AddDays(-1), DateTime.Now.AddYears(2));
string bsn = string.Empty;
var zaakBsn = HelperManager.LeraarReposHelper.GetByBsn(bsn);
var zaak = new Zaak
{
Type = 100,
Verwijzing = Banners.ToString(), //zaakBsn.ToString(), //_bsnGenerator.GetUniqueBSNNumberFromListZaak(),
Status = 103,
Substatus = null,
Afhandeling = 106,
Actiehouder = 101,
DatumBinnenkomst = datumBinnenkomst,
DatumAfgehandeld = DatumAfgehandeld,
Steekproef = generateZeroOrNull(),
ZaakNotitie = new[] { NotitieZaak },
ZaakHistorie = new[] { zaakHistory }
};
HelperManager.ZaakReposHelper.Insert(zaak);
return zaak;
}
}
但是BSN号只有9个数字
这是GetBsn方法：
Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.
ErrorMessage = "The field Verwijzing must be a string or array type with a maximum length of '16'."
但是如何从列表中获得一个随机的bsn号呢？
谢谢。
这是GetListAll（）的方法：
public Leraar GetByBsn(string bsn)
{
return GetAll().FirstOrDefault(l => l.BrpPersoon.Bsn.Equals(bsn, StringComparison.InvariantCultureIgnoreCase));
}
所以，如果我这样做：
public IList<BrpPersoon> GetListAll()
{
IQueryable<BrpPersoon> result = GetAll();
result = result.Where(r => true);
return result
.OrderBy(r => r.Bsn)
.ToList();
}
然后我会回来：
具有bsn编号的对象。
但是如何只返回一个随机的bsn号码？
谢谢
public void ReturnAll33()
{
var hallo = HelperManager.BrpPersoonReposHelper2.GetListAll()
.Where(p => p.Bsn != "1")
.OrderBy(x => Guid.NewGuid())
.Take(1).ToList();
Console.WriteLine(hallo);
}
然后我得到一个正确的随机bsn数： 309943917。
但是我得到这个错误：
Verwijzing字段必须是最大长度为'16'的字符串或数组类型。
当我评估财产时，像这样：
public void ReturnAll33()
{
var numReviews = RandomNumber(1, 100);
var hallo = HelperManager.BrpPersoonReposHelper2.GetListAll()
.Where(p => p.Bsn != "1")
.OrderBy(x => Guid.NewGuid())
.Take(numReviews)
.Select(p => p.Bsn)
.Take(1).ToList();
Console.WriteLine(hallo);
}
现在看起来像这样：
var numReviews = RandomNumber(1, 100);
var selectRandomBsnNumber = HelperManager.BrpPersoonReposHelper2.GetListAll()
.Where(p => p.Bsn != "1")
.OrderBy(x => Guid.NewGuid())
.Take(numReviews)
.Select(p => p.Bsn)
.Take(1).ToList();
//
ZaakNotitie NotitieZaak = CreateZaakNotitie();
ZaakHistorie zaakHistory = CreateZaakHistorie();
DateTime datumBinnenkomst = GetRandomDate(DateTime.Now.AddMonths(-18), DateTime.Now);
var DatumAfgehandeld = ProbabilityBool(80) ? null : (DateTime?)GetRandomDate(DateTime.Now.AddDays(-1), DateTime.Now.AddYears(2));
var zaak = new Zaak
{
Type = 100,
Verwijzing = selectRandomBsnNumber.ToString(),
Status = 103,
Substatus = null,
Afhandeling = 106,
Actiehouder = 101,
DatumBinnenkomst = datumBinnenkomst,
DatumAfgehandeld = DatumAfgehandeld,
Steekproef = generateZeroOrNull(),
ZaakNotitie = new[] { NotitieZaak },
ZaakHistorie = new[] { zaakHistory }
};
HelperManager.ZaakReposHelper.Insert(zaak);
答案 0 :(得分：0)
您显示的代码是Verwijzing = Banners.ToString()，但Banners似乎是一个列表：
var Banners = HelperManager.LeraarReposHelper.GetAll()
.Where(p => p.PersoonId != 1)
.OrderBy(x => Guid.NewGuid())
.Take(1).ToList();
因此，您尝试将ToString的{{1}}放入List属性中。
如果我查看您问题的最后一句话，似乎您应该将Verwijzing放到该属性中。
我认为这与随机数无关。