如何在MVC 5中的DeleteConfirmed操作中传递用户的ID？

Question

代码如下：

1）控制器：

public async Task<ActionResult> Delete(string id)
{
    if (id == null)
    {
        return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
    }
    var user = await UserManager.FindByIdAsync(id);
    if (user == null)
    {
        return HttpNotFound();
    }
    return PartialView(user);
}

[HttpPost, ActionName("Delete")]
[ValidateAntiForgeryToken]
public async Task<ActionResult> DeleteConfirmed(string id)
{
    if (ModelState.IsValid)
    {
        if (id == null)
        {
            return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
        }

        var user = await UserManager.FindByIdAsync(id);
        if (user == null)
        {
            return HttpNotFound();
        }

        // Remove all the User Group references:
        await this.GroupManager.ClearUserGroupsAsync(id);

        // Then Delete the User:
        var result = await UserManager.DeleteAsync(user);
        if (!result.Succeeded)
        {
            ModelState.AddModelError("", result.Errors.First());
            return PartialView();
        }
        return RedirectToAction("Index");
    }
    return PartialView();
}

2）删除视图：

@model StatusZN.Models.ApplicationUser

@{
    ViewBag.Title = "Delete";
}

<h2>Delete.</h2>

<h3>Are you sure you want to delete this User?</h3>
<div>
    <h4>User.</h4>
    <hr />
    <dl class="dl-horizontal">
        <dt>
            @Html.DisplayNameFor(model => model.UserName)
        </dt>

        <dd>
            @Html.DisplayFor(model => model.UserName)
        </dd>
        <dd>
            @Html.DisplayFor(model => model.Id)
        </dd>
    </dl>

    @using (Ajax.BeginForm("Delete", "UsersAdmin", new AjaxOptions { HttpMethod = "POST", UpdateTargetId = "UsersDiv"}, new { id = Model.Id}))
    {
        @Html.AntiForgeryToken()

        <div class="form-actions no-color">
            <input type="submit" value="Delete" class="btn btn-default" /> |
            @*@Html.ActionLink("Back to List", "Index")*@
            <a href="#" onclick="BackToUsersList()">Back to List</a>
        </div>
    }
</div>

Visualy看起来如下：

问题是程序流进入DeleteConfirmed操作，但参数id为null。

如何传递模型中存在的参数？

Answer 1

您使用错误的Ajax.BeginForm()重叠并添加length=10作为路由值（因为"UsersAdmin"有10个字符）而adding id为<form>您的@using (Ajax.BeginForm("Delete", "UsersAdmin", new { id = Model.Id }, new AjaxOptions { ....} )) 标记的html属性。您需要使用this overload，所以

routeValues

其中第3个参数是.map()