Question

我尝试为日期输入制作3个下拉列表。提交后，BindModel中的IModelBinder方法将日，月和年组合为一种类型。我的问题是缺少数据，控制器收到一个新的“测试日”

public class DateAndTimeModelBinder : IModelBinder
{
    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        var request = controllerContext.HttpContext.Request;
        int day, month, year;
        day = int.Parse(bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".day").AttemptedValue);
        month = int.Parse(bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".month").AttemptedValue);
        year = int.Parse(bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".year").AttemptedValue);
        DateTime date = new DateTime(year, month, day);
        TestDay tday = new TestDay();
        tday.Day2T = date;
        return tday;
    }
}

控制器：

[HttpPost]
    //[ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "ID, Day2T.day, Day2T.day.month")]TestDay testday)
    {
        if (ModelState.IsValid)
        {
            db.TestDays.Add(testday);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return View(testday);
    }

Html代码：

<div class="col-md-10">

    @Html.DropDownListFor(model => model.Day2T.Day, Enumerable.Range(1, 31).Select(i => new SelectListItem { Value = i.ToString(), Text = i.ToString() }), "Day")
    @Html.ValidationMessageFor(model => model.Day2T.Day)

    @Html.DropDownListFor(model => model.Day2T.Month, Enumerable.Range(1, 12).Select(i => new SelectListItem { Value = i.ToString(), Text = System.Globalization.CultureInfo.InvariantCulture.DateTimeFormat.GetMonthName(i) }), "Month")
    @Html.ValidationMessageFor(model => model.Day2T.Month)

    @Html.DropDownListFor(model => model.Day2T.Year, Enumerable.Range(1900, 117).Select(i => new SelectListItem { Value = i.ToString(), Text = i.ToString() }), "Year")
    @Html.ValidationMessageFor(model => model.Day2T.Year)@**@
</div>

Answer 1

此问题已修复。我想要新手的帖子可以找到答案，如果他们有同样的问题。我忘了在Global.asax.cs

中发布代码

ModelBinders.Binders.Add（typeof（DateTime），new DateAndTimeModelBinder（））;

我在控制器中删除[Bind（包括=＆＃34; ID，Day2T.day，Day2T.day.month＆＃34;）]。

        public ActionResult Edit([Bind(Include="ID,Day2T")] TestDay testday)

并在BindModel函数中更改return：

    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        ...
        DateTime date = new DateTime(year, month, day);
        ...
        return date;
    }

我的代码在MVC 5中的模型绑定有什么问题？

1 个答案: