我正在我的桌子上执行搜索,但是我在搜索的Linq字段在数据库表中找不到,但是我在模型中创建了一个。在我正在搜索的表中,我记录了一个实际上是用户ID的Created_By字段。我显示了我从另一个表构建的用户的全名。我希望用户能够搜索CreatedFullName。在他们正在搜索的表中,结果集显示了我在其模型中定义的CreatedFullName,但它不允许我搜索它,因为它不在实际的表中。我收到以下错误
{"The specified type member 'CreateFullName' is not supported in LINQ to Entities. Only initializers, entity members, and entity navigation properties are supported."}
我的模型将字段定义为 -
public string CreateFullName { get; set; }
我将字段添加到
的结果集中foreach (DeviceLog x in devicelogs)
{
//Retreive full name for Created By and Modified By
x.CreateFullName = GetFullName(x.CREATED_BY);
if (x.MODIFIED_BY != null)
{
x.ModifiedFullName = GetFullName(x.MODIFIED_BY);
}
}
我的Linq查询.Where
声明
if (!String.IsNullOrEmpty(searchString3))
{
devicelogs = devicelogs.Where(s => s.CreateFullName.Contains(searchString3));
ViewBag.Search = "Search";
}
我的整个模特
public int DeviceLogID { get; set; }
public int DeviceLogTypeID { get; set; }
public int DeviceID { get; set; }
[Required]
[DataType(DataType.MultilineText)]
[Display(Name = "Device Log Entry")]
public string DeviceLogEntry { get; set; }
[Required]
[Display(Name = "Entry Date")]
[DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
public System.DateTime EntryDate { get; set; }
[Display(Name = "Date Created")]
[DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
public System.DateTime DATE_CREATED { get; set; }
[Display(Name = "Created By")]
public string CREATED_BY { get; set; }
[Display(Name = "Date Modified")]
[DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
public DateTime? DATE_MODIFIED { get; set; }
[Display(Name = "Modified By")]
public string MODIFIED_BY { get; set; }
[Display(Name = "Entry Number")]
public int EntryNumber { get; set; }
public bool Corrected { get; set; }
public virtual Device Device { get; set; }
public virtual DeviceLogType DeviceLogType { get; set; }
public virtual ICollection<DeviceLogAudit> DeviceLogAudits { get; set; }
public string CreateFullName { get; set; }
public string ModifiedFullName { get; set; }
答案 0 :(得分:0)
EF无法将您的查询转换为SQL,因为CreateFullName
在数据库中不存在。
假设您已经为CREATE_BY和MODIFIED_BY创建了用户表的外键,那么EF应该创建名称为“CREATED_BYUser&#34;”的伪字段。使用您查询中的那些:
devicelogs = devicelogs.Where(s => s.CREATED_BYUser.FullName.Contains(searchString3));
答案 1 :(得分:0)
什么是devicelogs? IQueryable的?首次将数据分配给devicelog时,请尝试使用link_to
。