MVC EF Lazy Загрузка - Определите, когда загружено?

Я установил ленивую загрузку по модели. Однако производительность все же кажется немного медленной. Есть ли способ, который я могу точно определить, когда загружается ленивый объект? У меня создается впечатление, что это может быть загрузка, когда я этого не хочу.MVC EF Lazy Загрузка - Определите, когда загружено?

Любая помощь была бы принята с благодарностью. Дайте мне знать, если образцы кода помогут - и я опубликую их.

Спасибо.

EDIT:

Вот соответствующий код. По существу, в нем перечислены данные о заданиях. Существуют кнопки для загрузки данных расписания и данных о работе (через ajax). Я бы ожидал, что до этого не будут загружены данные о расписании или данных заметок (однако, после добавления события ObjectMaterialized, кажется, что они есть);

Контроллер:

public async Task<ActionResult> Index() 
{ 
    return View(await this._JobRepository.GetActiveByUserAsync(User.Identity.Name)); 
}

Repository:

public async Task<List<JobModel>> GetActiveByUserAsync(string user) 
{ 
    return await this.FindAllAsync(j => (j.AssignedTo.UserName == user || j.JobOwner.UserName == user) && j.Status == 2); 
} 

public async Task<List<JobModel>> FindAllAsync(Expression<Func<JobModel, bool>> match) 
{ 
    return await this._db.Jobs.Where(match).ToListAsync(); 
}

Вид:

индекс:

@using <Namepace>.Models 
@model IEnumerable<JobModel> 

@{ 
    ViewBag.Title = "Jobs"; 
} 

<div class="container"> 
    <section id="searchSection"> 
     <div class="searchField"> 
      <div class="searchButton" onclick="searchJob()"></div> 
      <div><input id="searchTextBox" placeholder="ID | Name | Description | Customer" title="Search for a job's ID, Name, Description or Customer" /></div> 
     </div> 
    </section> 
    <section id="searchResultsSection" style="display:none;"> 
     <div class="title">Search Results</div> 
     <div id="searchResults"></div> 
    </section> 
    <section id="myJobsSection"> 
     <div class="title">My Jobs</div> 
     @Html.Partial("_JobDetailsListPartial", Model) 
    </section> 
</div> 

@section head { 
    @Styles.Render("~/Content/jobDetails.css") 
    @Scripts.Render("~/Scripts/jobDetailFunctions.js") 
}

_JobDetailsListPartial:

@using <Namespace>.Models 
@model IEnumerable<JobModel> 

<div class="jobListContainer"> 
    @foreach (JobModel job in Model) 
    { 
     @Html.Partial("_JobDetailsPartial", job); 
    } 
</div> 
@if (Model.Count() < 1) 
{ 
    <div style="padding:10px 20px 10px 20px;">No Results Found.</div> 
}

_JobDetailsPartial:

@using <Namespace>.Models 
@model JobModel 

<section class="jobSection"> 
    <section class="headerSection"> 
     <div class="detailField" style="padding-bottom:20px"> 
      <div class="fieldTitle">@Html.DisplayNameFor(m => m.ID)</div> 
      <div>@Html.DisplayFor(m => m.ID)</div> 
      <div class="detailButton expandButton" onclick="showHideExpandingSection(this, 'JobDetails')"></div> 
     </div> 
     <div class="detailField"> 
      <div class="fieldTitle">@Html.DisplayNameFor(m => m.Name)</div> 
      <div>@Html.DisplayFor(m => m.Name)</div> 
     </div> 
     <div class="detailField"> 
      <div class="fieldTitle">@Html.DisplayNameFor(m => m.Account)</div> 
      <div>@Html.DisplayFor(m => m.Account.Name)</div> 
     </div> 
    </section> 
    <section class="jobDetailsExpandingSection expandingSection" style="display:none;"> 
     <section style="border-bottom: 1px solid #D8D8D8;"> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.StatusName)</div> 
       <div>@Html.DisplayFor(m => m.StatusName)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Stage)</div> 
       <div>@Html.DisplayFor(m => m.Stage)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Type)</div> 
       <div>@Html.DisplayFor(m => m.Type)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Rate.Description)</div> 
       <div>@Html.DisplayFor(m => m.Rate.Description)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Rate.RatePerHour)</div> 
       <div>[email protected](Model.Rate.RatePerHour.HasValue ? Html.DisplayFor(m => m.Rate.RatePerHour) : new MvcHtmlString("0.00"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.JobPriority)</div> 
       <div>@Html.DisplayFor(m => m.JobPriority)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Account.Owner)</div> 
       <div>@Html.DisplayFor(m => m.Account.Owner.Name)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.JobOwner)</div> 
       <div>@Html.DisplayFor(m => m.JobOwner.Name)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.AssignedTo)</div> 
       <div>@Html.DisplayFor(m => m.AssignedTo.Name)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.ScheduledDate)</div> 
       <div>@(Model.ScheduledDate.HasValue ? Html.DisplayFor(m => m.ScheduledDate) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.StartDate)</div> 
       <div>@(Model.StartDate.HasValue ? Html.DisplayFor(m => m.StartDate) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.DeadlineDate)</div> 
       <div>@(Model.DeadlineDate.HasValue ? Html.DisplayFor(m => m.DeadlineDate) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.FinishedDate)</div> 
       <div>@(Model.FinishedDate.HasValue ? Html.DisplayFor(m => m.FinishedDate) : new MvcHtmlString("Not Set"))</div> 
      </div> 
     </section> 
     <div class="expandingField"> 
      <div>@Html.DisplayNameFor(m => m.CustomerContact)</div> 
      <div class="detailButton expandInnerButton" onclick="showHideExpandingSection(this, 'Contact')"></div> 
     </div> 
     <section class="customerExpandingSection expandingSection" style="display:none;border-bottom: 1px solid #D8D8D8;"> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.CustomerContact.Name)</div> 
       <div>@Html.DisplayFor(m => m.CustomerContact.Name)</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Address.Address)</div> 
       <div>@(!String.IsNullOrEmpty(Model.Address.Address) ? Html.DisplayFor(m => m.Address.Address) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Address.City)</div> 
       <div>@(!String.IsNullOrEmpty(Model.Address.City) ? Html.DisplayFor(m => m.Address.City) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Address.State)</div> 
       <div>@(!String.IsNullOrEmpty(Model.Address.State) ? Html.DisplayFor(m => m.Address.State) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Address.Country)</div> 
       <div>@(!String.IsNullOrEmpty(Model.Address.Country) ? Html.DisplayFor(m => m.Address.Country) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Address.PostCode)</div> 
       <div>@(!String.IsNullOrEmpty(Model.Address.PostCode) ? Html.DisplayFor(m => m.Address.PostCode) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.CustomerContact.Phone)</div> 
       <div>@(!String.IsNullOrEmpty(Model.CustomerContact.Phone) ? !String.IsNullOrEmpty(Model.CustomerContact.PhoneExtention) ? new MvcHtmlString("(" + Html.DisplayFor(m => m.CustomerContact.PhoneExtention) + ") " + Html.DisplayFor(m => m.CustomerContact.Phone)) : new MvcHtmlString("") : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.CustomerContact.Mobile)</div> 
       <div>@(!String.IsNullOrEmpty(Model.CustomerContact.Mobile) ? Html.DisplayFor(m => m.CustomerContact.Mobile) : new MvcHtmlString("Not Set"))</div> 
      </div> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.CustomerContact.Email)</div> 
       <div>@(!String.IsNullOrEmpty(Model.CustomerContact.Email) ? Html.DisplayFor(m => m.CustomerContact.Email) : new MvcHtmlString("Not Set"))</div> 
      </div> 
     </section> 
     <div class="expandingField"> 
      <div>@Html.DisplayNameFor(m => m.Description)</div> 
      <div class="detailButton expandInnerButton" onclick="showHideExpandingSection(this, 'JobDescription')"></div> 
     </div> 
     <section class="jobDescriptionExpandingSection expandingSection" style="display:none;border-bottom: 1px solid #D8D8D8;"> 
      <div class="detailField"> 
       <div>@Html.DisplayNameFor(m => m.Description)</div> 
       <div style="white-space: pre-line">@(!String.IsNullOrEmpty(Model.Description) ? Html.DisplayFor(m => m.Description) : new MvcHtmlString("Not Set"))</div> 
      </div> 
     </section> 

     <div class="expandingField"> 
      <div>@Html.DisplayNameFor(m => m.Timesheets)</div> 
      <div class="detailButton expandInnerButton" onclick="showHideExpandingSection(this, 'JobTimesheets', @Model.ID)"></div> 
     </div> 
     <section id="[email protected]" class="jobTimesheetsExpandingSection expandingSection" style="display:none;"></section> 

     <div class="expandingField"> 
      <div>@Html.DisplayNameFor(m => m.JobNotes)</div> 
      <div class="detailButton expandInnerButton" onclick="showHideExpandingSection(this, 'JobNotes', @Model.ID)"></div> 
     </div> 
     <section class="jobNotesExpandingSection expandingSection" style="display:none;"></section> 
    </section> 
</section>

Модель:

using System; 
using System.Collections.Generic; 
using System.ComponentModel.DataAnnotations; 
using System.ComponentModel.DataAnnotations.Schema; 

namespace <Namespace>.Models 
{ 
    [Table("v_ITQJobs")] 
    public partial class JobModel 
    { 
     [Key] 
     [DatabaseGenerated(DatabaseGeneratedOption.None)] 
     [Display(Name = "Job ID:")] 
     [Column("JOBID")] 
     public int ID { get; set; } 

     [Display(Name = "Job Name:")] 
     [Column("JOBNAME")] 
     public string Name { get; set; } 

     [Column("ACCOUNTID")] 
     public int? AccountID { get; set; } 

     [Display(Name = "Customer:")] 
     public virtual CustomerModel Account { get; set; } 

     [Display(Name = "Job Description:")] 
     [Column("DESCRIPTION")] 
     public string Description { get; set; } 

     [Column("JOBOWNERID")] 
     public int? JobOwnerID { get; set; } 

     [Display(Name = "Owned By:")] 
     public virtual EmployeeModel JobOwner { get; set; } 

     [Column("USERID")] 
     public int? AssignedToID { get; set; } 

     [Display(Name = "Assigned To:")] 
     public virtual EmployeeModel AssignedTo { get; set; } 

     [Column("STATUSID")] 
     public int? Status { get; set; } 

     [Display(Name = "Status:")] 
     [Column("STATUSNAME")] 
     public string StatusName { get; set; } 

     [Display(Name = "Stage:")] 
     [Column("STAGENAME")] 
     public string Stage { get; set; } 

     [Display(Name = "Type:")] 
     [Column("TYPENAME")] 
     public string Type { get; set; } 

     public RateModel Rate { get; set; } 

     [Display(Name = "Priority:")] 
     [Column("JOBPRIORITY")] 
     public string JobPriority { get; set; } 

     [Column("SCHEDULEDDATETIME")] 
     [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy HH:mm}")] 
     [Display(Name = "Scheduled Date:")] 
     public DateTime? ScheduledDate { get; set; } 

     [Column("STARTDATETIME")] 
     [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy HH:mm}")] 
     [Display(Name = "Start Date:")] 
     public DateTime? StartDate { get; set; } 

     [Column("ETADATETIME")] 
     [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy HH:mm}")] 
     [Display(Name = "Deadline Date:")] 
     public DateTime? DeadlineDate { get; set; } 

     [Column("FINISHEDDATETIME")] 
     [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy HH:mm}")] 
     [Display(Name = "Finish Date:")] 
     public DateTime? FinishedDate { get; set; } 

     [Column("CONTACTID")] 
     public int? ContactID { get; set; } 

     [Display(Name = "Customer Contact")] 
     public virtual ContactModel CustomerContact { get; set; } 

     public AddressModel Address { get; set; } 

     [Display(Name = "Timesheets")] 
     public virtual ICollection<TimesheetModel> Timesheets { get; set; } 

     [Display(Name = "Job Notes")] 
     public virtual ICollection<ITQJobNoteModel> JobNotes { get; set; } 

     [Column("ISGLOBAL")] 
     public bool IsGlobal { get; set; } 

     [NotMapped] 
     public string GroupName { 
      get 
      { 
       return this.IsGlobal ? "Global Jobs" : "My Jobs"; 
      } 
     } 

     [NotMapped] 
     public string Caption 
     { 
      get 
      { 
       if (this.ID != default(int)) 
        return String.Format("{0} - {1}", this.ID, this.Name); 
       else 
        return null; 
      } 
     } 

     public JobModel() 
     { 
      this.JobNotes = new HashSet<ITQJobNoteModel>(); 
      this.Timesheets = new HashSet<TimesheetModel>(); 
     } 
    } 
}

Как я могу предотвратить их загрузку, пока я не хочу, чтобы они?

источник

2015-05-19 Luke

Вам действительно нужно размещать примеры кода. –

Вы можете использовать событие ObjectContext.ObjectMaterialized и подписаться на конструктор DbContext.

((IObjectContextAdapter)yourDbContext).ObjectContext.ObjectMaterialized += HandlerFunction;

Смотрите также: Where to subscribe to ObjectMaterialized using EF6?

источник

2015-05-19 06:24:09 jjj

MVC EF Lazy Загрузка - Определите, когда загружено?

ответ

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