我希望你选择剑道实体路径,但会有一个学习曲线。不,关于第 4 个问题。但让我让您快速开始使用 Razor 视图引擎并回答 1、2 和 3。
首先,EF 正在创建业务对象。您“应该”将这些转换为 MVC 中的模型。在此示例中,Person 来自 EF。我认为这是扁平化的,因为它消除了对象的深度,尽管它仍然可用,所以如果你的数据库是这样设置的,你可以引用 Person.Titles.Name 之类的东西。你也可以加入 DataAnnotations,它只是摇滚。
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using Project.Business;
namespace Project.Web.Models
{
public class PersonModel
{
public int Id { get; set; }
[Required(ErrorMessage = "Last Name is required.")]
public string LastName { get; set; }
[Required(ErrorMessage = "First Name is required.")]
public string FirstName { get; set; }
[Display(Name = "Created")]
public System.DateTime StampCreated { get; set; }
[Display(Name = "Updated")]
public System.DateTime StampUpdated { get; set; }
[Display(Name = "Enabled")]
public bool IsActive { get; set; }
public PersonModel()
{}
public PersonModel(Person person)
{
Id = person.Id;
FirstName = person.FirstName;
LastName = person.LastName;
StampCreated = person.StampCreated;
StampUpdated = person.StampUpdated;
IsActive = person.IsActive;
}
public static IList<PersonModel> FlattenToThis(IList<Person> people)
{
return people.Select(person => new PersonModel(person)).ToList();
}
}
}
一路走来...
@(Html.Kendo().Grid<PersonModel>()
.Name("PersonGrid")
.Columns(columns => {
columns.Bound(b => b.Id).Hidden();
columns.Bound(b => b.LastName).EditorTemplateName("_TextBox50");
columns.Bound(b => b.FirstName).EditorTemplateName("_TextBox50");
columns.Bound(b => b.StampUpdated);
columns.Bound(b => b.StampCreated);
columns.Bound(b => b.IsActive).ClientTemplate("<input type='checkbox' ${ IsActive == true ? checked='checked' : ''} disabled />").Width(60);
columns.Command(cmd => { cmd.Edit(); cmd.Destroy(); }).Width(180);
})
.ToolBar(toolbar => toolbar.Create())
.Pageable()
.Filterable()
.Sortable()
.Selectable()
.Editable(editable => editable.Mode(GridEditMode.InLine))
.DataSource(dataSource => dataSource
.Ajax()
.Events(events => events.Error("error_handler"))
.Model(model =>
{
model.Id(a => a.Id);
model.Field(a => a.StampCreated).Editable(false);
model.Field(a => a.StampUpdated).Editable(false);
model.Field(a => a.IsActive).DefaultValue(true);
})
.Create(create => create.Action("CreatePerson", "People"))
.Read(read => read.Action("ReadPeople", "People"))
.Update(update => update.Action("UpdatePerson", "People"))
.Destroy(destroy => destroy.Action("DestroyPerson", "People"))
.PageSize(10)
)
)
那些 _TextBox50 是名为 _TextBox50.cshtml 的 EditorTemplates,必须放在相对于您的视图或相对于您的共享文件夹的子文件夹中 - 该文件夹必须称为 EditorTemplates。这个好像是这样的……
@Html.TextBox(string.Empty, string.Empty, new { @class = "k-textbox", @maxlength = "50" })
是的,仅此而已。这是一个简单的例子,它们可以变得更复杂。或者您最初不必使用它们。
最后,我认为你真正在寻找什么......
public partial class PeopleController : Controller
{
private readonly IPersonDataProvider _personDataProvider;
public PeopleController() : this(new PersonDataProvider())
{}
public PeopleController(IPersonDataProvider personDataProvider)
{
_personDataProvider = personDataProvider;
}
public ActionResult Manage()
{
>>> Left in as teaser, good to apply a special Model to a View to pass goodies ;)
var model = new PeopleViewModel();
model.AllQualifications = QualificationModel.FlattenToThis(_qualificationDataProvider.Read());
return View(model);
}
[HttpPost]
public JsonResult CreatePerson([DataSourceRequest]DataSourceRequest request, Person person)
{
if (ModelState.IsValid)
{
try
{
person = _personDataProvider.Create(person);
}
catch (Exception e)
{
ModelState.AddModelError(string.Empty, e.InnerException.Message);
}
}
var persons = new List<Person> {person};
DataSourceResult result = PersonModel.FlattenToThis(persons).ToDataSourceResult(request, ModelState);
return Json(result, JsonRequestBehavior.AllowGet);
}
public JsonResult ReadPeople([DataSourceRequest]DataSourceRequest request)
{
var persons = _personDataProvider.Read(false);
DataSourceResult result = PersonModel.FlattenToThis(persons).ToDataSourceResult(request);
return Json(result, JsonRequestBehavior.AllowGet);
}
[HttpPost]
public JsonResult UpdatePerson([DataSourceRequest]DataSourceRequest request, Person person)
{
if (ModelState.IsValid)
{
try
{
person = _personDataProvider.Update(person);
}
catch (Exception e)
{
ModelState.AddModelError(string.Empty, e.InnerException.Message);
}
}
var persons = new List<Person>() {person};
DataSourceResult result = PersonModel.FlattenToThis(persons).ToDataSourceResult(request, ModelState);
return Json(result, JsonRequestBehavior.AllowGet);
}
[HttpPost]
public JsonResult DestroyPerson([DataSourceRequest]DataSourceRequest request, Person person)
{
if (ModelState.IsValid)
{
try
{
person = _personDataProvider.Destroy(person);
}
catch (Exception e)
{
ModelState.AddModelError(string.Empty, "There was an error deleting this record, it may still be in use.");
}
}
var persons = new List<Person>() {person};
DataSourceResult result = PersonModel.FlattenToThis(persons).ToDataSourceResult(request, ModelState);
return Json(result, JsonRequestBehavior.AllowGet);
}
}
请注意,在这种情况下,每个方法都将 EF Person 作为参数,使用 PersonModel 会更好,但我将不得不展示 Flatten 的反面。这是有效的,因为它们实际上是相同的。如果模型不同,或者您使用的是类工厂,它会变得更加棘手。
我特意向你展示了所有的 CRUD 操作。如果您不将结果传递回网格,它会表现得很有趣并给您重复或无法在 CREATE 和 UPDATE 上正确显示更新。它在 DELETE 上传回以传递可能有任何错误的 ModelState。
最后是数据提供者,以免留下任何想象......(省略了命名空间声明。)
using System;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Linq;
using Project.Business;
public class PersonDataProvider : ProviderBase, IPersonDataProvider
{
public Person Create(Person person)
{
try
{
person.StampCreated = DateTime.Now;
person.StampUpdated = DateTime.Now;
Context.People.Attach(person);
Context.Entry(person).State = EntityState.Added;
Context.SaveChanges();
return person;
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
throw;
}
}
public IList<Person> Read(bool showAll)
{
try
{
return (from q in Context.People
orderby q.LastName, q.FirstName, q.StampCreated
where (q.IsActive == true || showAll)
select q).ToList();
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
throw;
}
}
...
}
请注意 Interface 和 ProviderBase 继承,您必须进行这些继承。应该足够简单以找到示例。
这可能看起来像很多编码,但一旦你把它写下来,只需复制粘贴。
快乐编码。