您好我正在开发mvc5中的Web应用程序。我的登录表单包含用户名和密码字段，如下所示。
@using (Html.BeginForm("ClickAction", "Login", FormMethod.Post))
{
@Html.TextBox("txtUid", null, new { @maxlength = "15", id = "txtUid",
@class = "form-control validate[requiredInLogin] text-input "})
@Html.Password("txtPassword", null, new { @maxlength = "15", id =
"txtPassword", @class = "form-control validate[requiredOutLogin] text-input" })
<input type="submit" class="btn btn-primary btnLogin red"
value="SIGN IN" name="submit" />
}
我有以下行动方法，
[HttpPost]
public ActionResult ClickAction()
{
//Some logic
//When 3 unsuccessful attempts made to login then i set
//ViewBag.captcha = true;
return View();
}
我将尝试3次登录失败，然后我将ViewBag.captcha设置为true。一旦我将ViewBag.captcha设置为true，我想在View中访问ViewBag.captcha值，我想显示验证码。我可以知道如何在视图中访问Viewbag值吗？任何帮助，将不胜感激。谢谢，
与此同时，我尝试了以下选项，
@{
var message = ViewBag.captcha;
}
然后在JS
var message = '@message';
if (message)
{
alert(message);
}
以下是我的登录视图。
<html>
<head></head>
<body>
<div id="formID">
@*<form id="formID">*@
<div class="loginContainer">
<div class="loginContentArea">
<div class="loginLogo"><img src="~/images/c3card.png" alt="C3 Card" align="middle" /></div>
@using (Html.BeginForm("ClickAction", "Login", FormMethod.Post))
{
<div class="loginUsernamePassword">
<i class="fa fa-user"></i>
@Html.TextBox("txtUid", null, new { @maxlength = "15", id = "txtUid", @class = "form-control validate[requiredInLogin] text-input ", placeholder = "Username", autocomplete = "off" })
</div>
<div class="loginUsernamePassword">
<i class="fa fa-lock"></i>
@Html.Password("txtPassword", null, new { @maxlength = "15", id = "txtPassword", @class = "form-control validate[requiredOutLogin] text-input", placeholder = "Password", autocomplete = "off", Style = "background:#FFFFFF;" })
</div>
<div class="errormessage">@TempData["Message"]</div>
<div class="captcha" id="captcha">
<div class="g-recaptcha" data-badge="inline" data-sitekey=@System.Configuration.ConfigurationManager.AppSettings["recaptchaPublicKey"]></div>
<br />
</div>
<div class="loginButton">
<input type="submit" class="btn btn-primary btnLogin red" value="SIGN IN" name="submit" />
</div>
<div class="loginLink">@Html.ActionLink("Forgot Your Password?", "Index", "ForgotPassword")@*<a href="#" data-featherlight="#recoverpwd"></a>*@</div>
}
</div>
</div>
</div>
<script type="text/javascript">
$(function () {
$('input[type=password]').each(function () {
$(this).attr('data-background-color', $(this).css('background-color'));
$(this).css('background-color', $(this).css('color'));
$(this).attr('type', 'text');
$(this).focus(function () {
$(this).attr('type', 'password');
$(this).css('background-color', $(this).attr('data-background-color'));
});
$(this).blur(function () {
$(this).css('background-color', $(this).css('color'));
$(this).attr('type', 'text');
});
});
});
jQuery(document).ready(function () {
@{ var message = ViewBag.captcha; }
alert(message);
if (message) { alert(message); }
$("[id=captcha]").hide();
// binds form submission and fields to the validation engine
jQuery("#formID").validationEngine();
$("formID").attr('autocomplete', 'off');
$('#txtUid').attr('autocomplete', 'off');
$('#txtPassword').attr('autocomplete', 'off');
});
$("#myinput").rules("add", {
minlength: 2
});
</script>
</body>
</html>
这对我不起作用。
我是否知道在上述场景中访问viewbag值的正确方法？任何帮助非常感谢。非常感谢。
答案 0 :(得分：2)
您可以像这样初始化#!/bin/sh
# iOS universal library build script supporting swift modules inclusive simulator slices
# prevention from running xcodebuild in a recusive way
if [ "true" == ${ALREADYINVOKED:-false} ]; then
echo "RECURSION: Detected, stopping"
else
export ALREADYINVOKED="true"
# output directory for universal framework
UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal
mkdir -p "${UNIVERSAL_OUTPUTFOLDER}/iOS"
# build both device and simulator versions for iOS
xcodebuild -project "${PROJECT_NAME}.xcodeproj" -scheme "${PROJECT_NAME}" -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 8' ONLY_ACTIVE_ARCH=NO clean build
xcodebuild -project "${PROJECT_NAME}.xcodeproj" -scheme "${PROJECT_NAME}" -sdk iphoneos ONLY_ACTIVE_ARCH=NO clean build
# copy the framework structure from iphoneos build to the universal folder
cp -R "${BUILD_DIR}/${CONFIGURATION}-iphoneos/${PROJECT_NAME}.framework" "${UNIVERSAL_OUTPUTFOLDER}/iOS"
# copy existing Swift modules from iphonesimulator build to the universal framework directory
SIMULATOR_SWIFT_MODULES_DIR="${BUILD_DIR}/${CONFIGURATION}-iphonesimulator/${PROJECT_NAME}.framework/Modules/${PROJECT_NAME}.swiftmodule/"
if [ -d "${SIMULATOR_SWIFT_MODULES_DIR}" ]; then
cp -R "${SIMULATOR_SWIFT_MODULES_DIR}" "${UNIVERSAL_OUTPUTFOLDER}/iOS/${PROJECT_NAME}.framework/Modules/${PROJECT_NAME}.swiftmodule"
fi
# create universal binary file using lipo and place the combined executable in the universal framework directory
lipo -create -output "${UNIVERSAL_OUTPUTFOLDER}/iOS/${PROJECT_NAME}.framework/${PROJECT_NAME}" "${BUILD_DIR}/${CONFIGURATION}-iphonesimulator/${PROJECT_NAME}.framework/${PROJECT_NAME}" "${BUILD_DIR}/${CONFIGURATION}-iphoneos/${PROJECT_NAME}.framework/${PROJECT_NAME}"
# intermediate step for copying the framework to the project's directory
mkdir -p "${TMPDIR}/${PROJECT_NAME}/Frameworks/iOS"
cp -R "${UNIVERSAL_OUTPUTFOLDER}/iOS/${PROJECT_NAME}.framework" "${TMPDIR}/${PROJECT_NAME}/Frameworks/iOS"
# create a zip file and move it to the project's directory
cd "${TMPDIR}/${PROJECT_NAME}/Frameworks/iOS"
zip -r "${PROJECT_NAME}.framework.zip" "${PROJECT_NAME}.framework"
mkdir -p "${PROJECT_DIR}/universal-framework"
mv "${PROJECT_NAME}.framework.zip" "${PROJECT_DIR}/universal-framework"
# optional: show the project's directory in Finder
open "${PROJECT_DIR}/universal-framework"
fi
值：
ViewBag然后你可以在视图中这样访问它：
ViewBag.captcha = "true";
从这里开始，您将能够使用var message = @ViewBag.captcha;
。你基本上做的是以下几点：
message（请注意，此部分已注释掉）ViewBag.captcha message作为@message，但您未使用计算的Javascript值答案 1 :(得分：2)
由于您使用Razor，您可以这样做： 1.将ViewBag值变为变量
<script type="text/javascript">
var message = "@ViewBag.captcha";
</script>
您不必在文档中准备好它。 2.变量是string类型。为了在函数中使用它，你必须做类似的事情：
If(message.toLowerCase() == "true")
以获得理想的效果。
要将其转换为布尔值，您可以使用类似
的内容message = message.toLowerCase() === "true"
希望有所帮助
答案 2 :(得分：1)
您可以在JS中更改消息变量，然后尝试
jQuery(document).ready(function () {
var message = '@ViewBag.captcha'; //change it here
if (message)
{
alert(message);
}
$("[id=captcha]").hide();
// binds form submission and fields to the validation engine
jQuery("#formID").validationEngine();
$("formID").attr('autocomplete', 'off');
$('#txtUid').attr('autocomplete', 'off');
$('#txtPassword').attr('autocomplete', 'off');
});