[英]bind two data models to one model in mvc
I'm creating MVC 5 application, in this application I'm joining multiple data table using one var model and bind that values to "DiscussionPreview_Model" model to list down data我正在创建 MVC 5 应用程序,在此应用程序中,我使用一个 var 模型加入多个数据表并将该值绑定到“DiscussionPreview_Model”模型以列出数据
this is controller class这是控制器类
public ActionResult Discussion_Preview()
{
int Discussion_ID = 1;
var discussion_preview = (from d in db.AB_Discussion
where d.Discussion_ID == Discussion_ID
join dc in db.AB_DiscussionComments on d.Discussion_ID equals dc.Discussion_ID
join user_discussion in db.AspNetUsers on d.CreatedBy equals user_discussion.Id
join user_comments in db.AspNetUsers on dc.CreatedBy equals user_comments.Id
select new DiscussionPreview_Model
{
Disussion_ID = d.Discussion_ID,
Discussion_CreateDate = d.CreatedDate,
Discussion_CreateBy = user_discussion.UserName,
Discussion_Title = d.Discussion_Name,
Discussion_Description = d.Discription,
Comment_ID = dc.Comment_ID,
Comment_Description = dc.Comment_Discription,
Comment_CreateDate = dc.CreatedDate,
Comment_CreateBy = user_comments.UserName
});
return View(discussion_preview);
}
this is my "DiscussionPreview_Model" model class这是我的“DiscussionPreview_Model”模型类
public class DiscussionPreview_Model
{
DiscussionVM model1;
CommentVM model2;
}
public partial class DiscussionVM
{
public int Disussion_ID { get; set; }
public Nullable<System.DateTime> Discussion_CreateDate { get; set; }
public string Discussion_CreateBy { get; set; }
public string Discussion_Title { get; set; }
public string Discussion_Description { get; set; }
public IEnumerable<CommentVM> Comments { get; set; }
}
public partial class CommentVM
{
public int Comment_ID { get; set; }
public Nullable<System.DateTime> Comment_CreateDate { get; set; }
public string Comment_CreateBy { get; set; }
public string Comment_Description { get; set; }
}
This is View Page这是查看页面
@model IEnumerable<prjkt.Models.DiscussionPreview_Model>
@{
ViewBag.Title = "Discussion_Preview";
Layout = "~/Views/Shared/_Layout.cshtml";
}
@foreach (var discussion in Model.DiscussionVM)
{
<h3>>@discussion.Discussion_Title</h3>
<div>@discussion.Discussion_Description</div>
<div>@discussion.Discussion_CreateDate</div>
}
@foreach (var item in Model.CommentVM)
{
<fieldset>
<legend></legend>
<h4>Comments</h4>
<div class="display-field">@item.Comment_Description</div>
<div class="display-field">@item.Comment_CreateBy : @item.Comment_CreateDate </div>
</fieldset>
}
but this is not working properly, I tried to overcome this problem in many ways但这不能正常工作,我试图以多种方式克服这个问题
Really appreciate can suggest a strong linq query approach真的很感激可以建议一个强大的 linq 查询方法
This doesn't work here:这在这里不起作用:
@foreach (var discussion in Model.DiscussionVM)
because Model.DiscussionVM is not an IEnumerable<>因为 Model.DiscussionVM 不是 IEnumerable<>
Try enumerating Model and accessing .DiscussionVM of reach item in that collection尝试枚举模型并访问该集合中到达项目的 .DiscussionVM
@foreach (var item in Model)
{
<h3>@item.DiscussionVM.Discussion_Title</h3>
<div>@item.DiscussionVM.Discussion_Description</div>
<div>@item.DiscussionVM.Discussion_CreateDate</div>
}
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