Question

我的视图型号代码：

public class Step2ViewModel : MultiStepBaseViewModel
{
    public IList<LayoutDetail> LayoutConfig { get; set; }
}

我的观看代码：

@model eliteemail.Web.Mvc.Areas.Emails.ViewModels.Step2ViewModel
@{
    ViewBag.Title = "Layout";
    Layout = "~/Views/Shared/_HomeLayout.cshtml";
}

@using (Html.BeginForm())
{

    @Html.ValidationSummary(true)

    for (int i = 0; i < @Model.LayoutConfig.Count(); i++)
    {
    <div class="grid_3 tcenter">
        <div class="divhighlight">
            <div style="width: 165px; margin: 6px auto 4px auto;" class="f16 bold tcenter" id="helptrigger1">@Model.LayoutConfig[i].LayoutTitle</div>
            <a class="fancybox" rel="layouts" href="@Model.LayoutConfig[i].LayoutImgPrev" title="1 Column">
                <img src="@Model.LayoutConfig[i].LayoutImg" alt="1 Column" width="189" height="227" vspace="5" />
            </a>
            <div style="width:189px; margin:auto">
                <input type="submit" class="button gobutton" style="margin-right: 40px; width: 165px;" value="Select" name="@Model.LayoutConfig[i].LayoutID,@Model.LayoutConfig[i].LayoutTitle"/>
            </div>
        </div>
    </div>
    } 
}

我的控制器代码：

public ActionResult Step2()
{
    Step2BusinessLogic step2BusinessLogic = new Step2BusinessLogic();
    Step2ViewModel step2ViewModel = step2BusinessLogic.CreateStep2ViewModel();
    return View(step2ViewModel);
}

[HttpPost]
public ActionResult Step2(Step2ViewModel step2ViewModel)
{
    ....
}

我的业务逻辑类代码：

public class Step2BusinessLogic
{
    public Step2ViewModel CreateStep2ViewModel(string Id)
    {
        Step2ViewModel step2ViewModel = new Step2ViewModel();
        step2ViewModel.MultiStepId = new Guid(Id);
        step2ViewModel.LayoutConfig = GetLayout();
        return createEmailStep2ViewModel;
    }

    public List<LayoutDetail> GetLayout()
    {
        List<LayoutDetail> layoutList = new List<LayoutDetail>();

        LayoutDetail layout1 = new LayoutDetail();
        layout1.LayoutID = 1;
        layout1.LayoutTitle = "1 Column";
        layout1.LayoutImg = "~/img/create/layout/layout-1.png";
        layout1.LayoutImgPrev = "img/create/layout/layout-1-preview.png";
        layoutList.Add(layout1);

        LayoutDetail layout2 = new LayoutDetail();
        layout2.LayoutID = 2;
        layout2.LayoutTitle = "1:2 Column";
        layout2.LayoutImg = "~/img/create/layout/layout-2.png";
        layout2.LayoutImgPrev = "img/create/layout/layout-2-preview.png";
        layoutList.Add(layout2);

        .........(12 Items)

        return layoutList;
    }
}

public class LayoutDetail
{
    public int LayoutID { get; set; }

    public string LayoutTitle { get; set; }

    public string LayoutImg { get; set; }

    public string LayoutImgPrev { get; set; }
}

问题在于，当我从Step2View.cshtml提交时，

public ActionResult Step2(Step2ViewModel step2ViewModel)

正在调用

，但未设置step2ViewModel的属性，并且ModelState.IsValid返回false。我想避免这两个条件。请帮忙，因为我对MVC很新。

我搜索了几个链接但无法理解该方案。

Answer 1

问题是你在发帖时没有提交任何内容。除了按钮，您没有表单元素。如果您有表单元素，那么数据将被传回。尝试添加一个在您的视图中@Html.HiddenFor(o=>o.LayoutID)，然后再次发布。表单将回发隐藏的元素或表单字段，但不会像您一样只显示字段。

Answer 2

不要在集合对象上使用foreach循环，因为模型绑定器无法使用它。请改用for-loop。在您的代码中，将@item的每个出现替换为@Model.LayoutConfig[i]，请参阅下面的更新代码：

for(var i=0;i<@Model.LayoutConfig.Count();i++)
{
    <div class="grid_3 tcenter">
        <div class="divhighlight">
            <div style="width: 165px; margin: 6px auto 4px auto;" class="f16 bold tcenter" id="helptrigger1">@Model.LayoutConfig[i].LayoutTitle</div>
            <a class="fancybox" rel="layouts" href="@Model.LayoutConfig[i].LayoutImgPrev" title="1 Column">
                <img src=@Model.LayoutConfig[i].LayoutImg" alt="1 Column" width="189" height="227" vspace="5" />
            </a>
            <div style="width:189px; margin:auto">
                <input type="submit" class="button gobutton" style="margin-right: 40px; width: 165px;" value="Select" name="@Model.LayoutConfig[i].LayoutID, @Model.LayoutConfig[i].LayoutTitle"/>
            </div>
        </div>
    </div>
}

HttpPost上未设置View Model的属性

2 个答案: