Question

我收到如下错误

cannot convert from 'System.Collections.Generic.IEnumerable AnonymousType#1' to 'System.Collections.Generic.IEnumerable WebUI.DataModels.CandidateGeographiesAttributes'

我的代码如下：

//Able to get result from SP here 
List obj_Candidate_Geographies_List = 
    DBEntity.sp_GetCandidateEntityDataByFunctionTypeIdAndLevel(
        Convert.ToInt32(FunctionTypeEnum.Geography),
        Convert.ToInt32(EntityLevel.Undefined)
    ).ToList();

//Not able to convert to predefined model here 
IQueryable obj_Candidate_Geographies_Attributes_List = 
    (from c in DBEntity.Candidates.ToList() 
        join p in DBEntity.vw_Candidate_AttributesNew.ToList() 
            on c.CandidateId equals p.CandidateId 
        join q in obj_Candidate_Geographies_List 
            on c.CandidateId equals q.CandidateId 
    select new 
            { 
                CandidateId = c.CandidateId, 
                FirstName = q.FirstName, 
                LastName = q.LastName, 
                GeographyId = q.GeographyId, 
                GeographyName = q.GeographyName, 
                SkillId = p.SkillId, 
                SkillName = p.SkillName, 
                CreatedOn = c.CreatedOn, 
                ModifiedOn = c.ModifiedOn 
            }
        );

//Predefined Model
public class CandidateGeographiesAttributes 
{ 
    public int CandidateId { get; set; } 
    public string FirstName { get; set; } 
    public string LastName { get; set; } 
    public int GeographyId { get; set; } 
    public string GeographyName { get; set; } 
    public int SkillId { get; set; } 
    public string SkillName { get; set; } 
    public DateTime CreatedOn { get; set; } 
    public DateTime ModifiedOn { get; set; } 
}

有没有人可以帮我解决如何将linq结果转换为预定义数据模型列表。

Answer 1

您应该创建CanidateGeographicAttributes的实例，而不是让linq为您创建匿名类型：

select new { CandidateId = c.CandidateId, FirstNam ...

更改为：

select new CanidateGeographicAttributes() { CandidateId = c.CandidateId, FirstNam..

Answer 2

您需要创建新的CandidateGeographiesAttributes而不是匿名类型。就这样：

IQueryable<CandidateGeographiesAttributes> 
obj_Candidate_Geographies_Attributes_List = 
(from c in DBEntity.Candidates 

    join p in DBEntity.vw_Candidate_AttributesNew.ToList() on c.CandidateId
    equals  p.CandidateId 

    join q in obj_Candidate_Geographies_List on c.CandidateId 
    equals q.CandidateId 

    select new CandidateGeographiesAttributes
    { 
        CandidateId = c.CandidateId, 
        FirstName = q.FirstName, 
        LastName = q.LastName, 
        GeographyId = q.GeographyId, 
        GeographyName = q.GeographyName, 
        SkillId = p.SkillId, 
        SkillName = p.SkillName, 
        CreatedOn = c.CreatedOn, 
        ModifiedOn = c.ModifiedOn 
    }
).AsQueryable();

//Predefined Model 
public class CandidateGeographiesAttributes 
{ 
public int CandidateId { get; set; } 
public string FirstName { get; set; }
public string LastName { get; set; } 
public int GeographyId { get; set; } 
public string GeographyName { get; set; } 
public int SkillId { get; set; } 
public string SkillName { get; set; } 
public DateTime CreatedOn { get; set; } 
public DateTime ModifiedOn { get; set; } 
}

无法将Linq结果强制转换为现有的预定义模型

2 个答案: