登录到用户来自的页面后,ASP.NET MVC重定向

Question

我们以Visual Studio创建的标准默认ASP.NET MVC项目为例.

在../Home/About页面上我单击登录链接并转到该../Account/LogOn页面.登录后,我被重定向到Home页面,而不是Home/About我到达LogOn页面的页面.这是为什么？

虽然,在AccountController中我们有:

[HttpPost]
    public ActionResult LogOn(LogOnModel model, string returnUrl)
    {
        if (ModelState.IsValid)
        {
            if (MembershipService.ValidateUser(model.UserName, model.Password))
            {
                FormsService.SignIn(model.UserName, model.RememberMe);
                if (!String.IsNullOrEmpty(returnUrl))
                {
                    return Redirect(returnUrl);
                }
                else
                {
                    return RedirectToAction("Index", "Home");
                }
            }
            else
            {
                ModelState.AddModelError("", "The user name or password provided is incorrect.");
            }
        }

        // If we got this far, something failed, redisplay form
        return View(model);
    }

string returnUrl单击" 登录"链接后问题是否为空？单击" 登录"链接时如何为其分配值？

登录后如何将用户重定向到他/她来自的页面？

查看代码:

<asp:Content ID="loginContent" ContentPlaceHolderID="MainContent" runat="server">
<h2>Log On</h2>
<p>
    Please enter your username and password. <%: Html.ActionLink("Register", "Register") %> if you don't have an account.
</p>

<% using (Html.BeginForm()) { %>
    <%: Html.ValidationSummary(true, "Login was unsuccessful. Please correct the errors and try again.") %>
    <div>
        <fieldset>
            <legend>Account Information</legend>

            <div class="editor-label">
                <%: Html.LabelFor(m => m.UserName) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(m => m.UserName) %>
                <%: Html.ValidationMessageFor(m => m.UserName) %>
            </div>

            <div class="editor-label">
                <%: Html.LabelFor(m => m.Password) %>
            </div>
            <div class="editor-field">
                <%: Html.PasswordFor(m => m.Password) %>
                <%: Html.ValidationMessageFor(m => m.Password) %>
            </div>

            <div class="editor-label">
                <%: Html.CheckBoxFor(m => m.RememberMe) %>
                <%: Html.LabelFor(m => m.RememberMe) %>
            </div>

            <p>
                <input type="submit" value="Log On" />
            </p>
        </fieldset>
    </div>
<% } %>

编辑(补充):

看来上面的视图代码与问题不太相关,相反我应该看看这个(LogOnUserControl.ascx):

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %>
<%
    if (Request.IsAuthenticated) {
%>
    Welcome <b><%: Page.User.Identity.Name %></b>!
    [ <%: Html.ActionLink("Log Off", "LogOff", "Account") %> ]
<%
}
else {
%> 
    [ <%: Html.ActionLink("Log On", "LogOn", "Account")%> ]
<%
}
%>

Answer 1

生成LogOn链接时,需要传递returnUrl查询字符串参数:

<%: Html.ActionLink("Log On", "LogOn", "Account", new { returnUrl = Request.Url }, null)%>