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如何在.net項目中實現一個網站用戶登錄認證功能？針對這個問題，這篇文章詳細介紹了相對應的分析和解答，希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
cookie登錄后同域名下的網站保持相同的登錄狀態。
登錄
private void SetAuthCookie(string userId, bool createPersistentCookie)
{
var ticket = new FormsAuthenticationTicket(2, userId, DateTime.Now, DateTime.Now.AddDays(7), true, "", FormsAuthentication.FormsCookiePath);
string ticketEncrypted = FormsAuthentication.Encrypt(ticket);
HttpCookie cookie;
if (createPersistentCookie)//是否在設置的過期時間內一直有效
{
cookie = new HttpCookie(FormsAuthentication.FormsCookieName, ticketEncrypted)
{
HttpOnly = true,
Path = FormsAuthentication.FormsCookiePath,
Secure = FormsAuthentication.RequireSSL,
Expires = ticket.Expiration,
Domain = "cnblogs.com"//這里設置認證的域名，同域名下包括子域名如aa.cnblogs.com或bb.cnblogs.com都保持相同的登錄狀態
};
}
else
{
cookie = new HttpCookie(FormsAuthentication.FormsCookieName, ticketEncrypted)
{
HttpOnly = true,
Path = FormsAuthentication.FormsCookiePath,
Secure = FormsAuthentication.RequireSSL,
//Expires = ticket.Expiration,//無過期時間的，瀏覽器關閉后失效
Domain = "cnblogs.com"
};
}
HttpContext.Current.Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
HttpContext.Current.Response.Cookies.Add(cookie);
}這樣登錄后，在同域名下的任何頁面都可以得到用戶狀態
判斷用戶是否登錄
public bool IsAuthenticated
{
get
{
bool isPass = System.Web.HttpContext.Current.User.Identity.IsAuthenticated;
if (!isPass)
SignOut();
return isPass;
}
}得到當前的用戶名
public string GetCurrentUserId()
{
return _httpContext.User.Identity.Name;
}下面給大家一個具體的實例
CS頁代碼：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class Login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
string connString = Convert.ToString(ConfigurationManager.ConnectionStrings["001ConnectionString"]);
//001ConnectionString是我在webconfig里配置的數據庫連接。
SqlConnection conn = new SqlConnection(connString);
string strsql = "select * from User_table where User_name='" + UserName.Text + "' and Password='" + Password.Text + "'";
SqlCommand cmd = new SqlCommand(strsql, conn);
conn.Open();
SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
if (dr.Read())
{
Response.Redirect("index.aspx");
conn.Close();
}
else
{
FailureText.Text = "登陸失敗,請檢查登陸信息!";
conn.Close();
Response.Write("<script language=javascript>alert('登陸失敗!.');</script>");
}
}
protected void Button2_Click(object sender, EventArgs e) //文本框重置按鈕
{
UserName.Text = "";
Password.Text = "";
}
}下面是aspx頁面代碼：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns=" http://www.w3.org/1999/xhtml" > <head runat="server"> <title>無標題頁</title> </head> <body> <form id="form1" runat="server"> <asp:Panel ID="Panel1" runat="server" Height="101px" Width="231px" Wrap="False"> <table> <tr> <td align="center" colspan="2"> 用戶登陸</td> </tr> <tr> <td > 用戶名:</td> <td > <asp:TextBox ID="UserName" runat="server" Wrap="False"></asp:TextBox></td> </tr> <tr> <td > 密碼:</td> <td > <asp:TextBox ID="Password" runat="server" TextMode="Password" Width="148px" Wrap="False" ></asp:TextBox></td> </tr> <tr> <td align="center" colspan="2" > <asp:Button ID="Button1" runat="server" Text="登陸" Width="50px" OnClick="Button1_Click" /> <asp:Button ID="Button2" runat="server" Text="重置" Width="50px" OnClick="Button2_Click" /></td> </tr> <tr> <td align="center" colspan="2"> <asp:Label ID="FailureText" runat="server" Width="77px"></asp:Label></td> </tr> </table> </asp:Panel> </form> </body> </html>
關于如何在.net項目中實現一個網站用戶登錄認證功能問題的解答就分享到這里了，希望以上內容可以對大家有一定的幫助，如果你還有很多疑惑沒有解開，可以關注億速云行業資訊頻道了解更多相關知識。
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