Asp.net mvc Edit Page what can I use besides .Entry? - asp.net

Question

I adding an admin area to an Asp.net MVC4 Application and I would consider myself a entry-level developer. My edit [HttpGet] action is working fine as it returns the values of asset. I have poured through a bunch of MVC4 specials online and most of them use the following for [HttpPost] Edit method:
[HttpPost]
public ActionResult Edit(ITTESI.AssetTracker.Web.UI.ViewModels.AssetDetailsViewModel models)
{
try
{
if (ModelState.IsValid)
{
_entities.Entry(models).State = EntityState.Modified;
_entities.SaveChanges();
return RedirectToAction("Index", new { ID = models.ID });
}
}
catch (DataException)
{
ModelState.AddModelError("", "Unable able to save changes....epic fail!!!");
}
return View(models);
}
The problem is that I do not have access to use .Entry in the following:
_entities.Entry(models).State = EntityState.Modified;
I am obviously missing a reference that will enable me to use it, but I am not sure what it is.
Here is my ViewModel(I would have used DbContext, but they did not):
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using ITTESI.AssetTracker.Web.UI.Content.Classes;
namespace ITTESI.AssetTracker.Web.UI.ViewModels
{
public class AssetDetailsViewModel
{
public int ID { get; set; }
public string AssetIdentifier { get; set; }
public string ManufacturerName { get; set; }
public string Model { get; set; }
public string SchoolLocation { get; set; }
public string Status { get; set; }
public string Condition { get; set; }
// [DataType(DataType.MultilineText)]
public string Notes { get; set; }
public Utils.AssignReturn AssignReturnEligible { get; set; }
public string SchoolLocationCd { get; set; }
public string SchoolLocationDisplayValue { get; set; }
public AssignedUserViewModel AssignedUserViewModelObj { get; set; }
}
}
Here is my Admin Controller:
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Metadata.Edm;
using System.Linq;
using System.Runtime.Remoting.Messaging;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using ITTESI.AssetTracker.Data.EntityModel.Entity;
using ITTESI.AssetTracker.Data.EntityModel.Definition;
using System.Data.Entity;
using ITTESI.AssetTracker.Web.UI;
using ITTESI.AssetTracker.Web.UI.Content;
using ITTESI.AssetTracker.Web.UI.Content.Classes;
using ITTESI.AssetTracker.Web.UI.ViewModelBuilders;
using ITTESI.AssetTracker.Web.UI.ViewModels;
namespace ITTESI.AssetTracker.Web.UI.Controllers
{
public class AdminController : Controller
{
ExtendedITTESI_AssetTrackerEntities _entities = new ExtendedITTESI_AssetTrackerEntities();
public ActionResult Index(ViewModels.AssetDetailsViewModel assetDetails)
{
ViewBag.PageTitle = "Admin Search";
ViewBag.HideShowLocation = "hide";
ViewBag.SubmitButtonValue = "Search";
return View("Index", assetDetails);
}
[HttpGet]
public ActionResult Edit(ITTESI_AssetTracker_Asset asset) // 'ITTESI.AssetTracker.Web.UI.ViewModels.AssetDetailsViewModel'
{
ViewBag.PageTitle = "Edit Asset";
ViewBag.SubmitButtonValue = "Save";
ViewBag.ShowLocation = true;
var model = _entities.ITTESI_AssetTracker_Asset.FirstOrDefault();
return View(model);
}
[HttpPost]
//public ActionResult Edit(ExtendedITTESI_AssetTrackerEntities ate)
public ActionResult Edit(ITTESI.AssetTracker.Web.UI.ViewModels.AssetDetailsViewModel models)
{
try
{
if (ModelState.IsValid)
{
_entities.Entry(models).State = EntityState.Modified;
_entities.SaveChanges();
return RedirectToAction("Index", new { ID = models.ID });
}
}
catch (DataException)
{
ModelState.AddModelError("", "Unable able to save changes....epic fail!!!");
}
return View(models);
}
}
}
Here is my Edit View:
#model ITTESI.AssetTracker.Data.EntityModel.Entity.ITTESI_AssetTracker_Asset
#{
ViewBag.Title = "Edit";
}
<h2>Edit</h2>
#using (Html.BeginForm()) {
#Html.AntiForgeryToken()
#Html.ValidationSummary(true)
<fieldset>
<legend>ITTESI_AssetTracker_Asset</legend>
#Html.HiddenFor(model => model.ID)
<div class="editor-label">
#Html.LabelFor(model => model.AssetIdentifier)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.AssetIdentifier)
#Html.ValidationMessageFor(model => model.AssetIdentifier)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.AssetConditionID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.AssetConditionID)
#Html.ValidationMessageFor(model => model.AssetConditionID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.SchoolID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.SchoolID)
#Html.ValidationMessageFor(model => model.SchoolID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.AssetCategoryID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.AssetCategoryID)
#Html.ValidationMessageFor(model => model.AssetCategoryID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.VendorID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.VendorID)
#Html.ValidationMessageFor(model => model.VendorID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.AssignedPersonID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.AssignedPersonID)
#Html.ValidationMessageFor(model => model.AssignedPersonID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.AssetStatusID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.AssetStatusID)
#Html.ValidationMessageFor(model => model.AssetStatusID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.ManufacturerID)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.ManufacturerID)
#Html.ValidationMessageFor(model => model.ManufacturerID)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.ModelDetail)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.ModelDetail)
#Html.ValidationMessageFor(model => model.ModelDetail)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.CreatedOn)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.CreatedOn)
#Html.ValidationMessageFor(model => model.CreatedOn)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.CreatedByIdentifier)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.CreatedByIdentifier)
#Html.ValidationMessageFor(model => model.CreatedByIdentifier)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.ModifiedOn)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.ModifiedOn)
#Html.ValidationMessageFor(model => model.ModifiedOn)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.ModifiedByIdentifier)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.ModifiedByIdentifier)
#Html.ValidationMessageFor(model => model.ModifiedByIdentifier)
</div>
<div class="editor-label">
#Html.LabelFor(model => model.Notes)
</div>
<div class="editor-field">
#Html.EditorFor(model => model.Notes)
#Html.ValidationMessageFor(model => model.Notes)
</div>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
}
<div>
#Html.ActionLink("Back to List", "Index")
</div>
#section Scripts {
#Scripts.Render("~/bundles/jqueryval")
}
I also certain the problem is that DbContext for ExtendedITTESI_AssetTrackerEntities does not exist and after research a bit more that is part of the System.Data.Entity. The only code I have for ExtendedITTESI_AssetTrackerEntities is:
using System;
using Common.Logging;
using EFCachingProvider;
using EFCachingProvider.Caching;
using EFProviderWrapperToolkit;
using EFTracingProvider;
using ITTESI.AssetTracker.Data.EntityModel.Entity;
namespace ITTESI.AssetTracker.Data.EntityModel.Definition
{
public class ExtendedITTESI_AssetTrackerEntities : ITTESI_AssetTrackerEntities
{
private ILog logOutput;
public ExtendedITTESI_AssetTrackerEntities()
: this("name=ITTESI_AssetTrackerEntities")
{
}
public ExtendedITTESI_AssetTrackerEntities(string connectionString)
: base(EntityConnectionWrapperUtils.CreateEntityConnectionWithWrappers(
connectionString,
"EFTracingProvider",
"EFCachingProvider"
))
{
CachingPolicy = AssetTrackerEntitiesCachingPolicy.CachingPolicy();
Cache = AssetTrackerEntitiesCache.Cache();
}
#region Tracing Extensions
private EFTracingConnection TracingConnection
{
get { return this.UnwrapConnection<EFTracingConnection>(); }
}
public event EventHandler<CommandExecutionEventArgs> CommandExecuting
{
add { this.TracingConnection.CommandExecuting += value; }
remove { this.TracingConnection.CommandExecuting -= value; }
}
public event EventHandler<CommandExecutionEventArgs> CommandFinished
{
add { this.TracingConnection.CommandFinished += value; }
remove { this.TracingConnection.CommandFinished -= value; }
}
public event EventHandler<CommandExecutionEventArgs> CommandFailed
{
add { this.TracingConnection.CommandFailed += value; }
remove { this.TracingConnection.CommandFailed -= value; }
}
private void AppendToLog(object sender, CommandExecutionEventArgs e)
{
if (this.logOutput != null)
{
this.logOutput.Debug(e.ToTraceString().TrimEnd());
}
}
public ILog Log
{
get { return this.logOutput; }
set
{
if ((this.logOutput != null) != (value != null))
{
if (value == null)
{
CommandExecuting -= AppendToLog;
}
else
{
CommandExecuting += AppendToLog;
}
}
this.logOutput = value;
}
}
#endregion
#region Caching Extensions
private EFCachingConnection CachingConnection
{
get { return this.UnwrapConnection<EFCachingConnection>(); }
}
public ICache Cache
{
get { return CachingConnection.Cache; }
set { CachingConnection.Cache = value; }
}
public CachingPolicy CachingPolicy
{
get { return CachingConnection.CachingPolicy; }
set { CachingConnection.CachingPolicy = value; }
}
#endregion
}
}
I might have to create a model with DbContext is that fair to say?
Can I use anything besides .Entry? I appreciate the help, but with the way the app is set up I am not sure how to properly save edits back to the database.

Answer 1

there is a way besides .Entry for the Edit Action. EF is very clever, you can just fetch the object by ID form the database and change all the properties manually.
Ex:
[HttpPost]
public ActionResult Edit(ITTESI.AssetTracker.Web.UI.ViewModels.AssetDetailsViewModel models)
{
try
{
if (ModelState.IsValid)
{
ITTESI.AssetTracker.Web.UI.ViewModels.AssetDetailsViewModel temp = _entities.dbname.firstOrDefault(x = > x.ID == models.ID);
temp.AssetIdentifier = models.AssetIdentifier ;
temp.ManufacturerName = models.ManufacturerName ;
.
.
.
_entities.SaveChanges();
return RedirectToAction("Index", new { ID = models.ID });
}
}
catch (DataException)
{
ModelState.AddModelError("", "Unable able to save changes....epic fail!!!");
}
return View(models);
}
EF will understand what entity you want to modify, and will update it with "_entities.saveChanges();"
I don't really know that this will work for you, but I think it's worth trying