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c# - 接收 POST 请求但从未调用的操作方法

问题描述

在我的控制器中，我有一个从视图接收响应（200 OK）的操作方法，但它从不运行。该视图有一个 Url.Action，它向 action 方法发送请求，但该方法永远不会被调用。触发操作会导致空白页。

看法：

@model Project.Web.ViewModels.SomeModel

<div class="modal fade" id="@("RemoveThingModal" + Model.Id")" tabindex="-1" role="Dialog" aria-labelledby="@(RemoveThingModal" + Model.Id)">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <form id="@("DeleteForm" + Model.Id)" action="@Url.Action("RemoveThing", "Foo")" method="post">
                @Html.HiddenFor(m => m.Id)
                @Html.HiddenFor(m => m.SomeNameString)

                <div class="modal-header">
                    <button type="button" class="Close" data-dismiss="modal" aria-label="Close"><span aria-hidden="True">&times;</span></button>
                    <h4 class="modal-title" id="@("RemoveThingModal" + Model.Id)">@MainResource.DeleteModalTitle</h4>
                </div>
                <div class="modal-body col-md-12">
                    <div>
                        @MainResource.DeleteModalMessage
                        <h3>@string.Format("{0}: {1}", @MainResource.DataTableColumnThingName, Model.Name)</h3>
                    </div>
                </div>

                <div class="modal-footer col-md-12">
                    <button type="button" class="btn btn-default" data-dismiss="modal">@MainResource.CancelLink</button>
                    <button type="submit" id="#@("deleteSubmitButton" + Model.Id)" class="btn btn-danger">@MainResource.RemoveButton</button>
                </div>
            </form>
        </div>
    </div>
</div>

控制器（FooController）：

[HttpPost]
public ActionResult RemoveThing(int barId)
{
    System.Diagnostics.Debug.WriteLine("DEBUG: aaaa");    

    try {
        return RedirectToAction("List");
    }
    catch (Exception e)
    {
        throw new Exception(e.Message);
    }
}

甚至没有调用调试打印语句。在某些时候，它起作用了，但是没有提交更改并且撤消历史记录丢失了。

标签： c#asp.net-mvcrazorcontrollerrazor-pages

解决方案

您的操作需要一个名称为barId;的整数。您正在发送它，Id 因此找不到该操作。这是您需要的：

@model Project.Web.ViewModels.SomeModel

<div class="modal fade" id="@("RemoveThingModal" + Model.Id")" tabindex="-1" role="Dialog" aria-labelledby="@(RemoveThingModal" + Model.Id)">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            @using (Html.BeginForm("RemoveThing","Foo", FormMethod.Post)
            {
                @Html.AntiForgeryToken()
                @Html.HiddenFor(m => m.Id, new { id = "barId", Name = "barId" })
                @Html.HiddenFor(m => m.SomeNameString)

                <div class="modal-header">
                    <button type="button" class="Close" data-dismiss="modal" aria-label="Close"><span aria-hidden="True">&times;</span></button>
                    <h4 class="modal-title" id="@("RemoveThingModal" + Model.Id)">@MainResource.DeleteModalTitle</h4>
                </div>
                <div class="modal-body col-md-12">
                    <div>
                        @MainResource.DeleteModalMessage
                        <h3>@string.Format("{0}: {1}", @MainResource.DataTableColumnThingName, Model.Name)</h3>
                    </div>
                </div>

                <div class="modal-footer col-md-12">
                    <button type="button" class="btn btn-default" data-dismiss="modal">@MainResource.CancelLink</button>
                    <button type="submit" id="#@("deleteSubmitButton" + Model.Id)" class="btn btn-danger">@MainResource.RemoveButton</button>
                </div>
            }
        </div>
    </div>
</div>

在行动上：

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult RemoveThing(int barId)
{
    System.Diagnostics.Debug.WriteLine("DEBUG: aaaa");    

    try {
        return RedirectToAction("List");
    }
    catch (Exception e)
    {
        throw new Exception(e.Message);
    }
}

添加防伪验证与您的问题无关，但它是防止跨站点脚本攻击的好习惯。

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