无法将类型'ORS.DTO.GenderDTO'隐式转换为'System.Collections.Generic.IEnumerable'。存在显式转换（您是否错过了演员？） [英] Cannot implicitly convert type 'ORS.DTO.GenderDTO' to 'System.Collections.Generic.IEnumerable'. An explicit conversion exists (are you missing a cast?)

问题描述

我想填充表单数据库的dropdownlist但是会出现此错误...有人可以帮我解决此问题吗？无法将类型'ORS.DTO.GenderDTO'隐式转换为'System.Collections.Generic.IEnumerable' 。存在显式转换（您是否错过了演员表？）



i必须填充性别的下拉列表，并且必须获取存储在数据库中的值...

I wanted to populate the dropdownlistfor form database but this error is arises... Can Someone help me with this to remove this error Cannot implicitly convert type 'ORS.DTO.GenderDTO' to 'System.Collections.Generic.IEnumerable'. An explicit conversion exists (are you missing a cast?)

i have to populate dropdownlist for Gender and have to get values that are stores in the database...

public IEnumerable<GenderDTO> GetGenderList()
    {
        GenderDTO model = new GenderDTO();
        var gender = from g in db.CAT_GENDER
                     select g;
        model.GenderList = new SelectList(gender, "ID", "Description");
        return model;
    }

public class GenderDTO
{
    public int ID { get; set; }
    public string Description { get; set; }

    public SelectList GenderList { get; set; }
}

 public partial class CAT_GENDER
{
    public CAT_GENDER()
    {
        USER_PROFILE = new HashSet<USER_PROFILE>();
    }

    public int ID { get; set; }

    [Required]
    [StringLength(50)]
    public string DESCRIPTION { get; set; }

    public int STATUS_ID { get; set; }

    public virtual CAT_RECORD_STATUS CAT_RECORD_STATUS { get; set; }

    public virtual ICollection<USER_PROFILE> USER_PROFILE { get; set; }
}

推荐答案

嗯，请使用：

Umm, use this:

model.GenderList = db.CAT_GENDER.ToList().Select(g => new SelectListItem { Text = g.Description, Value = g.ID });

-KR

-KR

方法 GetGenderList（）的返回类型为 IEnumerable< genderdto>< / genderdto> 。

但是，model（返回的值）类型为 GenderDTO 。



使用以下代码相反

Method GetGenderList() has a return type of IEnumerable<genderdto></genderdto>.
However, model (value that is returned) is of type GenderDTO.

Use the following code instead

GenderDTO model = new GenderDTO();
       var gender = from g in db.CAT_GENDER
                    select g;
       model.GenderList = new SelectList(gender, "ID", "Description");
       List<genderdto> itms = new List<genderdto> ();
       itms.Add(model);
       return itms;</genderdto></genderdto>

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