开发工具：VS2015
框架 .net MVC
效果图
先实现验证码
在App_Start文件夹中，添加类VerifyCodeHelper
public class VerifyCodeHelper
{
public static Bitmap CreateVerifyCode(out string code)
{
//建立Bitmap对象，绘图
Bitmap bitmap = new Bitmap(200, 60);
Graphics graph = Graphics.FromImage(bitmap);
graph.FillRectangle(new SolidBrush(Color.White), 0, 0, 200, 60);
Font font = new Font(FontFamily.GenericSerif, 48, FontStyle.Bold, GraphicsUnit.Pixel);
Random r = new Random();
string letters = "ABCDEFGHIJKLMNPQRSTUVWXYZ0123456789";
StringBuilder sb = new StringBuilder();
//添加随机的四个字母
for (int x = 0; x < 4; x++)
{
string letter = letters.Substring(r.Next(0, letters.Length - 1), 1);
sb.Append(letter);
graph.DrawString(letter, font, new SolidBrush(Color.Black), x * 38, r.Next(0, 15));
}
code = sb.ToString();
//混淆背景
Pen linePen = new Pen(new SolidBrush(Color.Black), 2);
for (int x = 0; x < 6; x++)
graph.DrawLine(linePen, new Point(r.Next(0, 199), r.Next(0, 59)), new Point(r.Next(0, 199), r.Next(0, 59)));
return bitmap;
}
}
添加LoginController控制器
public class LoginController : Controller
{
// GET: Login
public ActionResult Index()
{
return View();
}
}
添加VerifyCode方法
////// 提供验证码 /// ///public ActionResult VerifyCode() { string verifyCode = string.Empty; Bitmap bitmap = App_Start.VerifyCodeHelper.CreateVerifyCode(out verifyCode); #region 缓存Key Cache cache = new Cache(); // 先用当前类的全名称拼接上字符串 “verifyCode” 作为缓存的key var verifyCodeKey = $"{this.GetType().FullName}_verifyCode"; cache.Remove(verifyCodeKey); cache.Insert(verifyCodeKey, verifyCode); #endregion MemoryStream memory = new MemoryStream(); bitmap.Save(memory, ImageFormat.Gif); return File(memory.ToArray(), "image/gif"); }
右键，添加Index视图
视图代码
@{
ViewBag.Title = "用户登录";
}
@using (Html.BeginForm("Index", "Login"))
{
@Html.Label("用户名")
@Html.TextBox("username")
@Html.Label("密码")
@Html.Password("password")
@Html.Label("验证码")
@Html.TextBox("verifyCode")
}
在控制器中写登录方法
[HttpPost]
public ActionResult Index(string login, string verifyCode)
{
if (login == "注册")
{
return View("Register");
}
string username = Request["username"];
string password = Request["password"];
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
{
return Content("");
}
// 第一步检验验证码
// 从缓存获取验证码作为校验基准
// 先用当前类的全名称拼接上字符串 “verifyCode” 作为缓存的key
Cache cache = new Cache();
var verifyCodeKey = $"{this.GetType().FullName}_verifyCode";
object cacheobj = cache.Get(verifyCodeKey);
if (cacheobj == null)
{
return Content("");
}//不区分大小写比较验证码是否正确
else if (!(cacheobj.ToString().Equals(verifyCode, StringComparison.CurrentCultureIgnoreCase)))
{
return Content("");
}
cache.Remove(verifyCodeKey);
//...接下来再进行账号密码比对等登录操作
string ps = App_Start.RedisHelper.GetHas("user", username);
if (App_Start.RedisHelper.GetHas("user", username) == password)
{
//获取登录的用户权限
string s = App_Start.RedisHelper.GetString(username);
Session["auther"] = App_Start.RedisHelper.GetString(username);//管理员为1，非管理员为0
//登录成功跳转
return RedirectToAction("Index", "Main");
}
else
{
return Content("");
}
}
账号密码对比是存于我的Redis之中，从Redis之中去进行验证。
有兴趣的可以参考我之前的博文：运用Redis
添加注册代码
先添加注册的控制器
public ActionResult Register()
{
return View();
}
添加Register视图
@{
ViewBag.Title = "用户注册";
}
用户注册
@using (Html.BeginForm("Register", "User"))
{
}
添加注册的方法
[HttpPost]
public ActionResult Register(string Register, string username, string password)//注册
{
if (Register == "返回")
{
return View("Index");
}
username = Request["username"];
password = Request["password"];
confirmpassword= Request["confirmpassword"];
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password) || string.IsNullOrEmpty(confirmpassword))
{
return Content("");
}
if(!string.Equals(password, confirmpassword))
return Content("");
if (App_Start.RedisHelper.HasContains("user", username))
{
return Content("");
}
App_Start.RedisHelper.SetHas("user", username, password);
//默认注册的都是操作员
App_Start.RedisHelper.SetString(username, "0");
return Content("");
}
完整控制器代码
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Caching;
using System.Web.Mvc;
namespace DSG_Analyse.Controllers
{
public class LoginController : Controller
{
// GET: Login
public ActionResult Index()
{
return View();
}
[HttpPost]
public ActionResult Index(string login, string verifyCode)
{
if (login == "注册")
{
return View("Register");
}
string username = Request["username"];
string password = Request["password"];
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password))
{
return Content("");
}
// 第一步检验验证码
// 从缓存获取验证码作为校验基准
// 先用当前类的全名称拼接上字符串 “verifyCode” 作为缓存的key
Cache cache = new Cache();
var verifyCodeKey = $"{this.GetType().FullName}_verifyCode";
object cacheobj = cache.Get(verifyCodeKey);
if (cacheobj == null)
{
return Content("");
}//不区分大小写比较验证码是否正确
else if (!(cacheobj.ToString().Equals(verifyCode, StringComparison.CurrentCultureIgnoreCase)))
{
return Content("");
}
cache.Remove(verifyCodeKey);
//...接下来再进行账号密码比对等登录操作
string ps = App_Start.RedisHelper.GetHas("user", username);
if (App_Start.RedisHelper.GetHas("user", username) == password)
{
//获取登录的用户权限
string s = App_Start.RedisHelper.GetString(username);
Session["auther"] = App_Start.RedisHelper.GetString(username);//管理员为1，非管理员为0
//登录成功跳转
return RedirectToAction("Index", "Main");
}
else
{
return Content("");
}
}
public ActionResult Register()
{
return View();
}
[HttpPost]
public ActionResult Register(string Register, string username, string password,string confirmpassword)//注册
{
if (Register == "返回")
{
return View("Index");
}
username = Request["username"];
password = Request["password"];
confirmpassword= Request["confirmpassword"];
if (string.IsNullOrEmpty(username) || string.IsNullOrEmpty(password) || string.IsNullOrEmpty(confirmpassword))
{
return Content("");
}
if(!string.Equals(password, confirmpassword))
return Content("");
if (App_Start.RedisHelper.HasContains("user", username))
{
return Content("");
}
App_Start.RedisHelper.SetHas("user", username, password);
//默认注册的都是操作员
App_Start.RedisHelper.SetString(username, "0");
return Content("");
}
///
/// 提供验证码
///
/// 
