C# 如何在基于表单的身份验证中检查用户是否登录
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How to check if user is logged in or not in forms based authentication
提问by Raghuveer
I want to implement forms based authentication manually in my website.
我想在我的网站中手动实施基于表单的身份验证。
I am using Web.configfile for data store
我正在使用Web.config文件进行数据存储
<authentication mode="Forms">
<forms loginUrl="~/Login.aspx"
name=".ASPXAUTH"
path="/"
requireSSL="false"
slidingExpiration="true"
defaultUrl="~/Admin/OrderHistory.aspx"
cookieless="UseDeviceProfile"
enableCrossAppRedirects="false"
>
<credentials passwordFormat="Clear">
<user name="Admin" password="adm123$"/>
<user name="Administrator" password="adm234%"/>
</credentials>
</forms>
</authentication>
<authorization>
<deny users ="?" />
<allow users = "*" />
</authorization>
There is a Login.aspxpage at root level in that im using ASP.NET login control to get username and password.
Login.aspx在根级别有一个页面，我使用 ASP.NET 登录控件来获取用户名和密码。
Everything works fine but when the user is logged inand manually go to login.aspxpage, its not redirect the user to defaultUrl page.
一切正常，但是当用户logged in手动转到login.aspx页面时，它不会将用户重定向到 defaultUrl 页面。
I want to redirect the user to a specific page/defaultUrl page, if he is logged in and came manually to login.aspx page
我想将用户重定向到特定页面/defaultUrl 页面，如果他已登录并手动进入 login.aspx 页面
How to do it?
怎么做？
Login Button-Click
登录按钮-单击
if (FormsAuthentication.Authenticate(LoginUser.UserName, LoginUser.Password))
{
FormsAuthentication.RedirectFromLoginPage(LoginUser.UserName, true);
}
采纳答案by Raab
if(HttpContext.Current.User.Identity.IsAuthenticated)
{
//Redirect to Default page
Response.Redirect("default.aspx");
}
回答by Sanket
I generally use the strategy of session for this.
我通常为此使用会话策略。
If a session is established then redirect the user to a specific page or else direct him to login.
如果建立了会话，则将用户重定向到特定页面或引导他登录。
You can refer for more info here http://asp.net-tutorials.com/state/sessions/
您可以在此处参考更多信息http://asp.net-tutorials.com/state/sessions/
回答by Sai
use the forms attribute defaulturl="xyz.aspx"(your URL) in your web.config file
在 web.config 文件中使用表单属性 defaulturl="xyz.aspx"（您的 URL）
回答by ASP-Developer
protected void Page_Load(object sender, EventArgs e)
{
if (!Request.UrlReferrer.Equals("http://localhost:1360/login_page.aspx"))
{
Response.Redirect("ERROR ==>? 404");
}
}
