添加額外的查詢返回（查看）

Question

我有一個ViewModel和我當前返回一個查詢，如果電影有僱員，他們有一個角色那麼該電影，演員和角色都是回。

現在我想添加一個額外的查詢，使string（或任何效果最好）的同一部電影中的所有員工。所以如果三個人在同一部電影中，我想要一個列表，以便我可以在我的視圖中調用它。

我當前的查詢/ 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)); 

而且它看起來像這樣

看我怎麼有「有史以來最偉大的電影」兩名員工，我想回到那個名單在我的電影下面有employeeList這個是我的Model，ViewModel和DB layo UT。

型號

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> 

圖

如果需要任何額外的信息，請讓我知道。

謝謝！

Answer 1

我想你應該添加一個屬性IEnumerable<string> employeeNames到視圖模型。

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) 
}; 

（注意，順便說一下，我用的導航性能，而不是連接）。

您可以通過連接顯示他們的員工：

string.Join(", ", employeeNames) 

無論是在視圖，或像在視圖模型EmployeeNamesString的屬性。

的如何做到這一點的視圖模型的一個例子：

public string EmployeeNamesString 
{ 
    get { return string.Join(", ", this.employeeNames); } 
} 

並在取景顯示EmployeeNamesString。