我有下面的代码。它使用实体框架(5.0)来处理/输出到sql server(2008)的数据。不幸的是,修改后的数据不能成功保存到数据库。任何身体帮助我将非常感激。实体框架不会将我的数据保存到sql server
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace MvcApplication1.Models
{
public class ProductEditViewModel
{
NorthwindEntities northwind = new NorthwindEntities();
public Product Product;
public ProductEditViewModel(Int32 ProductId)
{
Product = (from pro in northwind.Products
where pro.ProductID == ProductId
select pro).FirstOrDefault();
}
// For DropDownListFor need IEnumerable<SelectListItem>
public IEnumerable<SelectListItem> SupplierItems
{
get
{
var q = from sup in northwind.Suppliers.AsEnumerable()
select new SelectListItem
{
Text = sup.CompanyName,
Value = sup.SupplierID.ToString(),
Selected = sup.SupplierID == Product.SupplierID
};
return q;
}
}
// For RadioButtonFor need below
public IEnumerable<Category> CategorieItems
{
get
{
var q = from cat in northwind.Categories.AsEnumerable() select cat;
return q;
}
}
}
}
[HttpGet]
public ActionResult ProductEdit(Int32 ProductId)
{
var vm = new ProductEditViewModel(ProductId);
return View(vm);
}
[HttpPost]
public ActionResult ProductEdit(Int32 ProductId, FormCollection fc)
{
var vm = new ProductEditViewModel(ProductId);
UpdateModel(vm.Product, "Product");
var northwind = new NorthwindEntities();
northwind.SaveChanges();
return View(vm);
}
@model MvcApplication1.Models.ProductEditViewModel
@{
Layout = null;
}
<script type="text/javascript">
</script>
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>ProductEdit</title>
</head>
<body>
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>Product</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
@Html.HiddenFor(model => model.Product.ProductID)
<div class="form-group">
@Html.LabelFor(model => model.Product.ProductName, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Product.ProductName, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Product.ProductName, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Product.SupplierID, "SupplierID", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@*DropDownList is for deiplay purpose*@
@*@Html.DropDownList("SupplierID", Model.SupplierItems, htmlAttributes: new { @class = "form-control" })*@
@*DropDownListFor is for Edit purpose*@
@Html.DropDownListFor(model => model.Product.SupplierID, Model.SupplierItems, htmlAttributes: new { @class = "form-control" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Product.CategoryID, "CategoryID", htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@*RadioButton is for Display purpose*@
@*@foreach (var Categorie in Model.CategorieItems)
{
@Html.RadioButton("CategoryID", Categorie.CategoryID, Model.CategorySelectedId == Categorie.CategoryID) @Categorie.CategoryName; @:
}*@
@*RadioButtonFor is for Edit purpose*@
@foreach (var Categorie in Model.CategorieItems)
{
@Html.RadioButtonFor(model => model.Product.CategoryID, Categorie.CategoryID) @Categorie.CategoryName; @:
}
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Product.UnitPrice, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Product.UnitPrice, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Product.UnitPrice, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Product.Discontinued, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
<div class="checkbox">
@Html.EditorFor(model => model.Product.Discontinued)
@Html.ValidationMessageFor(model => model.Product.Discontinued, "", new { @class = "text-danger" })
</div>
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Save" class="btn btn-default" />
</div>
</div>
</div>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
</body>
</html>
一个你不应该用你的EntityFramework OBJE cts作为你的ViewModel,但这是一个完全独立的问题。您的代码UpdateModel在哪里?你的代码var northwind = new NorthwindEntities(); northwind.SaveChanges();与您从ProductEditViewModel获得的产品不同的上下文。 – 2014-09-03 20:42:35