在ASP.NETMVC中对表进行通用的增删改（三）-中华考试网

在ASP.NETMVC中对表进行通用的增删改（三）

2010-11-3编辑:dan

三、通用增加、修改

首先添加一个CreateEditView.aspx视图

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

<%Html.RenderPartial(ViewData["PartialName"].ToString()); %>

</asp:Content>

然后添加两个Partial视图News.ascx和User.ascx，这两个视图是分别基于News和User类的强类型视图，具体内容参加源码。

接下来我们添加相应的Controller

public ActionResult CreateEditView(string partialName, int? key)
        {

            ViewData["PartialName"] = partialName;

            RepositoryBase repositoryBase = new RepositoryBase(partialName);
            ICommonTable table;
            if (key == null)
            {
                table = repositoryBase.CreateNew();
            }
            else
            {
                table = repositoryBase.Get(key ?? 0);
            }

            return View("CreateEditView", table);
        }

        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult CreateEditView(string partialName, int? key, FormCollection formCollection)
        {
            RepositoryBase repositoryBase = new RepositoryBase(partialName);
            ICommonTable bllTable;
            if (key == null)
            {
                bllTable = repositoryBase.CreateNew();
            }
            else
            {
                bllTable = repositoryBase.Get(key ?? 0);
            }

            this.UpdateModel(bllTable, true);
            if (key == null)
            {
                Context.GetContext().GetTable(repositoryBase.EntityType).InsertOnSubmit(bllTable);

            }

            Context.GetContext().SubmitChanges();

            return RedirectToAction(partialName+"List");//返回到list
        }

这里边大家可能有疑问的就是this.UpdateModel(bllTable, true);这个方法在mvc框架中并不存在，这是我添加的扩展方法，这个地方如果使用UpdateModel(bllTable)虽然编译不会报错，但也没有更新成功，查了一下mvc的源码，问题就出在如下源码中：

protected internal bool TryUpdateModel<TModel>(TModel model, string prefix, string[] includeProperties, string[] excludeProperties, IDictionary<string, ValueProviderResult> valueProvider) where TModel : class {
            if (model == null) {
                throw new ArgumentNullException("model");
            }
            if (valueProvider == null) {
                throw new ArgumentNullException("valueProvider");
            }

            Predicate<string> propertyFilter = propertyName => BindAttribute.IsPropertyAllowed(propertyName, includeProperties, excludeProperties);
            IModelBinder binder = Binders.GetBinder(typeof(TModel));

            ModelBindingContext bindingContext = new ModelBindingContext() {
                Model = model,
                ModelName = prefix,
                ModelState = ModelState,
                ModelType = typeof(TModel),
                PropertyFilter = propertyFilter,
                ValueProvider = valueProvider
            };
            binder.BindModel(ControllerContext, bindingContext);
            return ModelState.IsValid;
        }

在ASP.NETMVC中对表进行通用的增删改（二）

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在ASP.NETMVC中对表进行通用的增删改（三）

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