Razor 如何为多对多关系构建创建视图
好的,看起来应该有人碰到这个,但我没有发现任何有用的东西。这是我的设想 我有一个客户和技能模型。目标是让客户对一组技能中的每一项进行评分,所有技能都是如此 所以,这里我将粘贴模型、视图模型、控制器和视图。最后是关键问题 型号Razor 如何为多对多关系构建创建视图,razor,asp.net-mvc-5,Razor,Asp.net Mvc 5,好的,看起来应该有人碰到这个,但我没有发现任何有用的东西。这是我的设想 我有一个客户和技能模型。目标是让客户对一组技能中的每一项进行评分,所有技能都是如此 所以,这里我将粘贴模型、视图模型、控制器和视图。最后是关键问题 型号 namespace ClientSkills.Models { public class Client { public int ClientId { get; set; } public string Name { get; set; } pub
namespace ClientSkills.Models
{
public class Client
{
public int ClientId { get; set; }
public string Name { get; set; }
public ICollection<ClientSkills> Skills { get; set; }
}
public class Skill
{
public int SkillId { get; set; }
public string Name { get; set; }
public ICollection<ClientSkills> Clients { get; set; }
}
public class Rating
{
public int RatingId { get; set; }
public string Name { get; set; }
public ICollection<ClientSkills> ClientSkills { get; set; }
}
public class ClientSkills
{
[Key, Column(Order=0)]
public int ClientId { get; set; }
[Key, Column(Order = 1)]
public int SkillId { get; set; }
public int RatingId { get; set; }
public Rating Rating { get; set; }
public Skill Skill { get; set; }
public Client Client { get; set; }
}
public partial class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public DbSet<Client> Client { get; set; }
public DbSet<Skill> Skill { get; set; }
public DbSet<Rating> Rating { get; set; }
public DbSet<ClientSkills> ClientSkills { get; set; }
}
}
namespace ClientSkills.Models
{
public class RateViewModel
{
public RateViewModel()
{
this.Skills = new List<SkillViewModel>();
}
public RateViewModel(Client client)
{
this.ClientId = client.ClientId;
this.Skills = new List<SkillViewModel>();
if (client.Skills.Count == 0)
{
var context = new ApplicationDbContext();
foreach (var skill in context.Skill)
{
var skillVM = new SkillViewModel(skill);
skillVM.SelectedRatingid = context.Rating.First(r => r.Name == "No aplica").RatingId;
Skills.Add(skillVM);
}
}
else
{
foreach (var item in client.Skills)
{
var skillVM = new SkillViewModel(item);
skillVM.SelectedRatingid = item.SkillId;
this.Skills.Add(skillVM);
}
}
}
public int ClientId { get; set; }
public List<SkillViewModel> Skills { get; set; }
}
public class SkillViewModel
{
public SkillViewModel()
{
Ratings = new List<Rating>();
}
public SkillViewModel(Skill skill)
{
var context = new ApplicationDbContext();
this.Ratings = context.Rating.ToList();
this.SkillId = skill.SkillId;
this.SkillName = skill.Name;
}
public SkillViewModel(ClientSkills item)
{
var context = new ApplicationDbContext();
this.Ratings = context.Rating.ToList();
this.SkillId = item.SkillId;
this.SkillName = item.Skill.Name;
this.SelectedRatingid = item.RatingId;
}
public List<Rating> Ratings { get; set; }
public int SelectedRatingid { get; set; }
public int SkillId { get; set; }
public string SkillName { get; set; }
}
}
查看
此视图通过向导创建一个Create视图,删除它创建的无用字段并将代码放在下面
<table>
<tr>
<td>Skill</td>
<td>Rate</td>
</tr>
@foreach (var item in Model.Skills)
{
<tr>
<td>
@Html.DisplayFor(model => model.Skills.First(i => i.SkillName == item.SkillName).SkillName, new { @class = "control-label col-md-2" })
</td>
<td>
@Html.DropDownListFor(x => item.SelectedRatingid, new SelectList(item.Ratings, "RatingId", "Name"), "Seleccione el valor")
</td>
</tr>
}
</table>
技巧
比率
@foreach(Model.Skills中的var项)
{
@DisplayFor(model=>model.Skills.First(i=>i.SkillName==item.SkillName).SkillName,新的{@class=“control label col-md-2”})
@Html.DropDownListFor(x=>item.SelectedRatingid,new SelectList(item.RatingId,“RatingId”,“Name”),“Seleccione el valor”)
}
问题是在RateViewModel(Client-Client)
构造函数中的skillVM.SelectedRatingid=context.Rating.First(r=>r.Name==“No-aplica”).RatingId代码>我为SelectedStatingId属性设置了默认值。我需要确保所有客户都对所有技能进行了评级,即使他们忘记或忽略了其中一项技能
加载视图时,我确信ratesid设置正确,技能名称看起来正常,但drop dpwn列表不显示所选的默认值
如何使视图将SelectedStatingId属性绑定到下拉列表控件?将所选值传递给SelectList:
@Html.DropDownListFor(x => item.SelectedRatingid, new SelectList(item.Ratings, "RatingId", "Name", item.SelectedRatingid), "Seleccione el valor")
根据我的理解(正确或错误),如果最后一个参数与某个选项值匹配,那么它就是一个对象,否则将选择选项中的第一个参数
更多关于过载的信息。我不是.net mvc专业人士,如果这是一个愚蠢的评论,我很抱歉。你能为SelectList
构造函数尝试另一个重载吗:@Html.DropDownListFor(x=>item.SelectedRatingid,new SelectList(item.Ratings,“RatingId”,“Name”,item.SelectedRatingid),“Seleccione el valor”)
注意SelectList
的第四个参数,当然,我会尝试并发布成功!!!请把它作为回答来给出你的观点。区别是什么?这是我第一次使用重载,下一个问题是帖子。技能列表为空:(你的意思是在表单提交上?
@Html.DropDownListFor(x => item.SelectedRatingid, new SelectList(item.Ratings, "RatingId", "Name", item.SelectedRatingid), "Seleccione el valor")