起初我想为我糟糕的英语道歉。 因此，我有两个模型，其中包含“多对多”，书籍，作者及其上下文库。正确包含所有源文件，不知道为什么我的代码不起作用。
标题中描述了我的问题。我希望你的帮助）。 所有代码都在下面（你不必阅读所有代码，我认为我的javascript中的问题，因为我的javascript技能非常糟糕）。 当我尝试连续设置所选作者时发生错误 in this moment
这里的Index.cshtml文件中的问题：（在更改功能中）
<script type="text/javascript">
function dataBound(e) {
var grid = this;
grid.tbody.children().each(function () {
var dataitem = grid.dataItem(this),
row = $(this);
eval(row.find("script").html());
var multiSelect = $(this).find("select").data("kendoMultiSelect");
multiSelect.value(dataitem.Authors.map(function (i) { return i.AuthorId }));
});
}
function change(e) {
var row = this.element.closest("tr"),
**//problem is here**
model = $("#grid").data("kendoGrid").dataItem(row);
model.set("Authors", this.dataItems());
}
function error_handler(e) {
if (e.errors) {
var message = "Errors:\n";
$.each(e.errors, function (key, value) {
if ('errors' in value) {
$.each(value.errors, function () {
message += this + "\n";
});
}
});
alert(message);
}
}
</script>@(Html.Kendo().Grid<ManyToMany.Models.ViewModel>()
.Name("grid")
.Columns(columns =>
{
columns.Bound(e => e.BookId).Visible(false);
columns.Bound(e => e.Pages);
columns.Bound(e => e.Genre);
columns.Bound(e => e.Publisher);
columns.Bound(e => e.Authors).ClientTemplate(
Html.Kendo().MultiSelect().Name("multi#=BookId#")
.DataTextField("AuthorName")
.DataValueField("AuthorId")
.BindTo((IEnumerable<ManyToMany.Models.Author>)ViewData["authors"]) /*TaskSecond.Models.ViewModel*/
.Events(e => e.Change("change"))
.ToClientTemplate().ToHtmlString()
);
columns.Command(command => command.Destroy()).Width(150);
})
.ToolBar(toolbar =>
{
toolbar.Create();
toolbar.Save();
})
.Editable(editable => editable.Mode(GridEditMode.InCell))
.Pageable()
.Filterable()
.Events(e => e.DataBound("dataBound"))
.DataSource(dataSource => dataSource
.Ajax()
.Batch(true)
.Model(model =>
{
model.Id(p => p.BookId);
model.Field(p => p.Pages).DefaultValue(0);
model.Field(p => p.Genre).DefaultValue(0);
model.Field(p => p.Publisher).DefaultValue("");
model.Field(p => p.Authors).DefaultValue(
ViewData["defaultAuthors"] as ManyToMany.Models.Author);
})
.PageSize(5)
.Read(read => read.Action("Books_Read", "Grid"))
.Create(create => create.Action("Books_Create", "Grid"))
.Update(update => update.Action("Books_Update", "Grid"))
.Destroy(destroy => destroy.Action("Books_Destroy", "Grid"))
.ServerOperation(false))
)
//////////////////////////////////////////////////////////////////
//defaultAuthors.cshtml
@model IEnumerable<ManyToMany.Models.ViewModel>
@(
Html.Kendo().MultiSelectFor(m => m)
.DataTextField("AuthorName")
.DataValueField("AuthorId")
.BindTo((IEnumerable<ManyToMany.Models.ViewModel>)ViewData["authors"])
)
我的控制器：
public class GridController : Controller
{ 私人图书馆db = new Library（）;
public ActionResult Index()
{
var temp = db.Authors.FirstOrDefault();
List<Author> author = new List<Author>();
author.Add(temp);
ViewData["defaultAuthors"] = author;
ViewData["authors"] = db.Authors;
return View();
}
public ActionResult Books_Read([DataSourceRequest]DataSourceRequest request)
{
IQueryable<Book> books = db.Books;
DataSourceResult result = books.ToDataSourceResult(request, c => new ViewModel
{
BookId = c.BookId,
BookName = c.BookName,
Pages = c.Pages,
Genre = c.Genre,
Publisher = c.Publisher,
Authors = new List<Author>(c.Authors)
});
return Json(result, JsonRequestBehavior.AllowGet);
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Books_Create([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ViewModel> books)
{
var entities = new List<Book>();
if (books != null && ModelState.IsValid)
{
foreach (var book in books)
{
var entity = new Book
{
BookName = book.BookName,
Pages = book.Pages,
Genre = book.Genre,
Publisher = book.Publisher,
Authors = new List<Author>(book.Authors)
};
db.Books.Add(entity);
entities.Add(entity);
}
db.SaveChanges();
}
return Json(entities.ToDataSourceResult(request, ModelState, book => new ViewModel
{
BookName = book.BookName,
Pages = book.Pages,
Genre = book.Genre,
Publisher = book.Publisher,
Authors = new List<Author>(book.Authors)
}));
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Books_Update([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ViewModel> books)
{
var entities = new List<Book>();
if (books != null && ModelState.IsValid)
{
foreach (var book in books)
{
var entity = new Book
{
BookId = book.BookId,
BookName = book.BookName,
Pages = book.Pages,
Genre = book.Genre,
Publisher = book.Publisher,
Authors = new List<Author>(book.Authors)
};
entities.Add(entity);
db.Books.Attach(entity);
db.Entry(entity).State = EntityState.Modified;
}
db.SaveChanges();
}
return Json(entities.ToDataSourceResult(request, ModelState, book => new ViewModel
{
BookName = book.BookName,
Pages = book.Pages,
Genre = book.Genre,
Publisher = book.Publisher,
Authors = new List<Author>(book.Authors)
}));
}
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Books_Destroy([DataSourceRequest]DataSourceRequest request, [Bind(Prefix = "models")]IEnumerable<ViewModel> books)
{
var entities = new List<Book>();
if (ModelState.IsValid)
{
foreach (var book in books)
{
var entity = new Book
{
BookId = book.BookId,
BookName = book.BookName,
Pages = book.Pages,
Genre = book.Genre,
Publisher = book.Publisher,
Authors = new List<Author>(book.Authors)
};
entities.Add(entity);
db.Books.Attach(entity);
db.Books.Remove(entity);
}
db.SaveChanges();
}
return Json(entities.ToDataSourceResult(request, ModelState, book => new ViewModel
{
BookName = book.BookName,
Pages = book.Pages,
Genre = book.Genre,
Publisher = book.Publisher,
Authors = new List<Author>(book.Authors)
}));
}
protected override void Dispose(bool disposing)
{
db.Dispose();
base.Dispose(disposing);
}
}
型号：
using System.Data.Entity;
public class Library : DbContext
{
public Library()
: base("name=Library")
{
}
public DbSet<Book> Books { get; set; }
public DbSet<Author> Authors { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
}
}
}
public class Book
{
public Book()
{
}
[ScaffoldColumn(false)]
public int BookId { get; set; }
[Display(Name = "Book Name")]
[MaxLength(100, ErrorMessage = "Book Name must be 100 characters or less"), MinLength(5)]
public string BookName { get; set; }
public int Pages { get; set; }
public string Publisher { get; set; }
public Genre Genre { get; set; }
[JsonIgnore]
public virtual ICollection<Author> Authors { get; set; }
}
public class Author
{
public Author()
{
}
[Required]
public int AuthorId { get; set; }
[Display(Name = "Author Name")]
[MaxLength(100, ErrorMessage = "Author Name must be 100 characters or less"), MinLength(5)]
public string AuthorName { get; set; }
[JsonIgnore]
public virtual ICollection<Book> Books { get; set; }
}
MyViewModel
public class ViewModel
{
public ViewModel()
{
Authors = new List<Author>();
}
public int BookId { get; set; }
public string BookName { get; set; }
public int Pages { get; set; }
public Genre Genre { get; set; }
public string Publisher { get; set; }
[UIHint("AuthorsEditor")]
public List<Author> Authors { get; set; }
}