Question

当我尝试重定向到特定视图时，我的应用程序在下面指定的语句中抛出System.NullReferenceException。

此异常发生在App_Web _ *****。dll中，并且不会详细处理。

我在此应用程序中没有使用任何主页或布局。我试图删除Layout = null并将ViewBag.Title =＆＃34; SignUp＆＃34;，但它会导致同样的问题。

public class SignUpWizardController : Controller
{
    //
    // GET: /SignUpWizard/
    public ActionResult SignUpWizard()
    {
        return View();   //This Function Call Below View.
    }

}
@{
    Layout = null;
}
<!DOCTYPE html>
<html>
<head>
    <title>Login</title>
    <link href="~/Content/css/main.css" rel="stylesheet" />
    <link href="~/Content/plugins/bootstrap/css/bootstrap.min.css" rel="stylesheet" />
    <script src="~/Scripts/knockout-2.2.0.js"></script>
    <script src="~/Scripts/knockout-2.2.0.debug.js"></script>
    <script src="~/Content/js/jquery.js"></script>
    <script src="~/ViewModel/LoginViewModel.js"></script>
</head>
<body>
    <nav class="navbar navbar-custom" role="navigation">
        <div class="container-fluid">
            <h2 class="text-center t-size-change">Login</h2>
        </div>
        <!-- /.container-fluid -->
    </nav>
    <div class="container m-t-150">
        <div class="row">
            <div class="col-md-12">
                <div class="login-tabs">
                    <!-- Nav tabs -->
                    <ul class="nav nav-tabs nav-justified nav-tabs-custom" role="tablist">
                        <li class="active"><a href="#home" role="tab" data-toggle="tab">Login</a></li>
                        <li><a href="#profile" role="tab" data-toggle="tab">Sign up for free</a></li>
                    </ul>
                    <!-- Tab panes -->
                    <div class="tab-content">
                        <div class="tab-pane active custom-tab" id="home">
                            <div class="row">
                                <div class="col-lg-12">
                                    <div class="form-group">
                                        <input type="email" placeholder="Email Address" class="form-control" name="Email" id="txtLogInEmail" required>
                                    </div>
                                    <div class="form-group">
                                        <input type="password" placeholder="Password" class="form-control" name="Password" id="txtLogInPassword" required>
                                    </div>
                                    <input type="button" value="Login to Tucan Rotas" class="btn btn-success btn-custom" id="btnLogIn" />
                                    <p class="text-center p-10"><a href="#">Forgot your password?</a></p>
                                </div>
                            </div>
                        </div>
                        <div class="tab-pane custom-tab" id="profile">
                            <div class="row">
                                <div class="col-lg-12">
                                    <div class="form-group">
                                        <input type="email" placeholder="Email Address" class="form-control" name="Email" id="txtSignUpEmail" required>
                                    </div>
                                    <div class="form-group">
                                        <input type="password" placeholder="Password" class="form-control" name="Password" id="txtSignUpPassword" required>
                                    </div>
                                    <input type="button" id="btnSignUp" class="btn btn-success btn-custom" value="Sign up for free" />
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <script src="~/Content/plugins/bootstrap/js/bootstrap.min.js"></script>
    <script src="~/Content/js/tab.js" type="text/javascript"></script>
    <script>
        $(function () {
            $('#btnSignUp').click(function (e) {
                e.preventDefault();
                $.ajax({
                    url:'@Url.Action("SignUp", "LogIn")',
                    method:"POST",
                    data: { Email: $('#txtSignUpEmail').val(), password: $('#txtSignUpPassword').val() }
                });
            });
            $('#btnLogIn').click(function (e) {
                e.preventDefault();
                $.ajax({
                    url: '@Url.Action("LogIn", "LogIn")',
                    method: "POST",
                    data: { Email: $('#txtLogInEmail').val(), password: $('#txtLogInPassword').val() }
                });
            });
        });
    </script>

</body>
</html>

有关异常的更多信息请参阅下面的堆栈跟踪。

[NullReferenceException: Object reference not set to an instance of an object.]
   ASP._Page_Views_SignUpWizard_SignUpWizard_cshtml.Execute() in d:\Scheduler\Scheduler\Views\SignUpWizard\SignUpWizard.cshtml:2
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +197
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +96
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +76
   System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +257
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +115
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +294
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +23
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +242
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +21
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +175
   System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +89
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +102
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +57
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +43
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +57
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +47
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +47
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9651688
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

enter image description here

Layout = null;在视图中创建System.NullReferenceException

0 个答案: