我有一个 ViewModel ,我现在返回一个查询,如果电影有员工,他们有角色,那么电影,演员和角色都会被返回。< / p>
现在我想为此添加一个额外的查询,使同一电影中所有员工的string
(或其他最佳效果)。所以,如果有三个人在同一部电影中,我想要一个列表,以便我可以在我的视图中调用它。
我当前的查询/ 控制器是
var parameter = Int32.Parse(Filter);
var queryString =
from m in db.Movies
join me in db.MovieEmployees
on m.ID equals me.movieID
join e in db.Employees
on me.employeeID equals e.ID
join r in db.Roles
on me.roleID equals r.ID
where (parameter == 1 && m.Name.Contains(searchString)) ||
(parameter == 2 && e.Name.Contains(searchString)) ||
(parameter == 3 && r.RoleType.Contains(searchString))
select new StarringViewModel { employeeID = e.ID, movieID = m.ID, roleID = r.ID,
movieName = m.Name, movieDescription = m.Description,
movieReleaseDate = m.ReleaseDate, employeeBirthdate = e.Birthday,
employeeName = e.Name, Role = r.RoleType };
return View(queryString.Distinct().ToList().OrderBy(x => x.movieName));
它看起来像这样
看看我是如何在&#34;史上最伟大的电影&#34;中找到两名员工,我想在&#34;主演&#34;中找回员工名单(employeeList
)。我在电影下面的字段
供参考,这是我的Model,ViewModel和DB布局。
模型
public class StarringViewModel
{
public int movieID { get; set; }
public int roleID { get; set; }
public int employeeID { get; set; }
public string movieName { get; set; }
public string movieDescription { get; set; }
public DateTime? movieReleaseDate { get; set; }
public string Role { get; set; }
public string employeeName { get; set; }
public DateTime employeeBirthdate { get; set; }
public string employeeList { get; set; } // <-- I want this to be the list of actors in same movies
}
查看
<table class="table table-striped table-hover table-responsive table-condensed">
<tr>
<th>
<h3 style="font-size: x-large; font-weight: bolder">Movie Name</h3>
</th>
<th>
<h3 style="font-size: x-large; font-weight: bolder">Release Date</h3>
</th>
<th>
<h3 style="font-size: x-large; font-weight: bolder">Employee</h3>
</th>
<th>
<h3 style="font-size: x-large; font-weight: bolder">@Html.DisplayNameFor(model => model.Role)</h3>
</th>
<th>
@using (Html.BeginForm("Index", "Starring"))
{
<div class="dropdown">
<select class="btn btn-group-lg btn-default col-md-4" style="margin-top: 15px; height: 36px; opacity: 1" data-toggle="dropdown" name="Filter">
<option value="0" disabled selected>Filter By...</option>
<option value="1">Movie Name</option>
<option value="2">Actor Name</option>
<option value="3">Role</option>
</select>
</div>
<input type="text" name="searchString" class="col-md-6" style="margin-top: 16px; text-align:center; height:35px; font-size:20px" placeholder="enter text" />
<button type="submit" class="btn btn-group-lg btn-primary col-md-2 glyphicon glyphicon-arrow-right" style="margin-top: 15px; height:36px; opacity:1" value="" />
}
</th>
@foreach (var item in Model)
{
<tr>
<td class="col-md-2">
<span style="font-size: 17px;">@Html.DisplayFor(modelItem => item.movieName)</span>
</td>
<td class="col-md-2">
<span style="font-size: 17px;">@Html.DisplayFor(modelItem => item.movieReleaseDate)</span>
</td>
<td class="col-md-1">
<span style="font-size: 17px;">@Html.DisplayFor(modelItem => item.employeeName)</span>
</td>
<td class="col-md-1">
<span style="font-size: 17px;">@Html.DisplayFor(modelItem => item.Role)</span>
</td>
<td class="col-md-3 col-md-offset-3">
</td>
</tr>
<tr>
<td colspan="12">
<p style="font-size: 17px; font-style: italic; font-family: 'Roboto', sans-serif">
Movie ID: @Html.DisplayFor(modelItem => item.movieID)
<br />
Description: @Html.DisplayFor(modelItem => item.movieDescription)
<br />
Starring: // ADD LIST OF EMPLOYEES HERE (item.employeeList)
</p>
</td>
</tr>
}
</table>
图
如果需要任何其他信息,请告诉我们。
谢谢!
答案 0 :(得分:1)
我认为你应该在视图模型中添加一个属性IEnumerable<string> employeeNames
。
var query =
from m in db.Movies
from me in m.MovieEmployees
where (parameter == 1 && m.Name.Contains(searchString)) ||
(parameter == 2 && me.Employee.Name.Contains(searchString)) ||
(parameter == 3 && me.Role.RoleType.Contains(searchString))
select new StarringViewModel
{
employeeID = e.ID,
movieID = m.ID, roleID = r.ID,
movieName = m.Name,
movieDescription = m.Description,
movieReleaseDate = m.ReleaseDate,
employeeBirthdate = me.Employee.Birthday,
employeeName = me.Employee.Name, Role = me.Role.RoleType,
employeeNames = m.MovieEmployees
.Selext(x => x.Employee.Name)
};
(顺便说一句,请注意,我使用导航属性而不是连接)。
您可以通过连接员工来显示员工:
string.Join(", ", employeeNames)
在视图中,或在视图模型中的EmployeeNamesString
属性中。
如何在视图模型中执行此操作的示例:
public string EmployeeNamesString
{
get { return string.Join(", ", this.employeeNames); }
}
并在视图中显示EmployeeNamesString
。