c# - 将 Razor View 字段绑定(bind)到 MVC 3 中的模型

Question

我在将我的 View (文本框和复选框)中的字段提交到我的模型时遇到问题，我不确定如何继续。每次我点击应该提交给模型的按钮时， Controller 都会检查应该由 View 设置的字段，但一直返回 false。所以要么他们一开始就没有设置，要么 Controller 读错了。无论哪种方式，我都不知所措。请帮忙:X

View (稍微简化):

@model Model

@Html.ValidationSummary()

@{ Html.BeginForm("PrintReport", "Controller", FormMethod.Get, new {     @class = "form_ll" }); }

<h1>@ViewBag.Title</h1>

<div class="group">
    @Html.ValidTextBoxFor(Model => Model.ToDate) 
    @Html.ValidTextBoxFor(Model => Model.FromDate)

    @Html.CheckBoxFor(Model => Model.Geplakt)
    @Html.CheckBoxFor(Model => Model.Geparafeerd)
    @Html.CheckBoxFor(Model => Model.Verschreven)
    @Html.CheckBoxFor(Model => Model.Geannuleerd)
    @Html.CheckBoxFor(Model => Model.Vermist)
    @Html.CheckBoxFor(Model => Model.Vernietigd)
    @Html.CheckBoxFor(Model => Model.Onbruikbaar)
    @Html.CheckBoxFor(Model => Model.Misdruk)
    @Html.CheckBoxFor(Model => Model.Teruggevonden)
    @Html.CheckBoxFor(Model => Model.InOnderzoek)
</div>
<div class="button">
    @Html.Button("Print")
</div>
@{ Html.EndForm(); }

型号:

[Serializable]
public class Model : DomainObject
{
    [DataType(DataType.Date)]
    public DateTime? FromDate { get; set; }
    [DataType(DataType.Date)]
    public DateTime? ToDate { get; set; }

    public bool Geplakt { get; set; }
    public bool Geparafeerd { get; set; }
    public bool Verschreven { get; set; }
    public bool Geannuleerd  { get; set; }
    public bool Vermist  { get; set; }
    public bool Vernietigd { get; set; }
    public bool Onbruikbaar { get; set; }
    public bool Misdruk { get; set; }
    public bool Teruggevonden { get; set; }
    public bool InOnderzoek { get; set; }

    public Model()
    {
        // Constructor
    }               
}

Controller :

public class Controller : ModelController<Model>
{
    [HttpGet]
    public ActionResult Index()
    {
        Model = new Model();
        return InternalIndex();
    }

    [HttpGet]
    public ActionResult InternalIndex()
    {
        return View("Index", Model);
    }

    [HttpGet]
    public ActionResult PrintReport()
    {
        if (!Model.FromDate.HasValue || !Model.ToDate.HasValue)
            ModelState.AddModelError("Date", "At leaste one date is null");
        else {
            if (Model.FromDate.Value.CompareTo(Model.ToDate.Value) >= 0)
                ModelState.AddModelError("Date", "First date is later then the second one");
        }
        if(Model.IsAnythingChecked())
            ModelState.AddModelError("Checkboxes", "You haven't checked any checkboxes");

        if (ModelState.IsValid)
        {
            return View("PrintReport", Model);
        }
        else
        {
            return InternalIndex();
        }
    }            

Answer 1

您正在使用 GET 而不是 POST。您正在将模型发送到未接收信息的 Controller 。一行应该是这样的:

@{ Html.BeginForm("PrintReport", "Controller", FormMethod.Post, new {     @class = "form_ll" }); }

您还需要将模型发送到 Controller 并将 Controller 中的方法设置为 HttpPost:

    [HttpPost]
public ActionResult PrintReport(Model m)
{
    if (!Model.FromDate.HasValue || !Model.ToDate.HasValue)
        ModelState.AddModelError("Date", "At leaste one date is null");
    else {
        if (Model.FromDate.Value.CompareTo(Model.ToDate.Value) >= 0)
            ModelState.AddModelError("Date", "First date is later then the second one");
    }
    if(Model.IsAnythingChecked())
        ModelState.AddModelError("Checkboxes", "You haven't checked any checkboxes");

    if (ModelState.IsValid)
    {
        return View("PrintReport", Model);
    }
    else
    {
        return InternalIndex();
    }
}   

试一试。