近期因为项目赶着上线，一直没时间接着写博客，今天最终空出了时间。声名：我不是专业美工，所以界面问题，希望大家不要拍砖。登录界面例如以下：
在ASP.NET MVC中，要新增一个功能，我们首先要加入一个控制器，AccountController.cs，加入方法：右键单击Controllers目录，
/// <summary>
/// 登录页面
/// </summary>
/// <returns></returns>
public ActionResult Index()
{
return View();
}
/// <summary>
/// 点击 登录系统 后取消
/// </summary>
/// <param name="model">登录信息</param>
/// <returns></returns>
[HttpPost]
public ActionResult Index(LogOnModel model)
{
#region 验证码验证
if (Session["_VCode"] != null && model.ValidateCode!=null&& model.ValidateCode.ToLower() != Session["_VCode"].ToString())
{
ModelState.AddModelError("PersonName", "验证码错误！"); //return "";
return View();
}
#endregion
if (ModelState.IsValid) //这个是界面数据的模型验证 相应LogOnModel模型类中 诸如：[Required(ErrorMessage = "请填写username")] 必填 ...等验证
{
SMUSERTB person = _accountService.ValidateUser(model.PersonName, xEncrypt.EncryptText(model.Password));
if (person != null) //登录成功
{
Account account = new Account();
account.USER_NAME = person.USER_NAME;
account.UID = person.U_ID;
account.USER_ID = person.USER_ID;
account.GuidCode = person.GUILD_CODE;
Session["account"] = account;
return RedirectToAction("Index", "Home");
}
}
ModelState.AddModelError("PersonName", "username或者password出错。");
return View();
}
public void ValidateCode()
{
Response.ClearContent(); //须要输出图象信息 要改动HTTP头
Response.ContentType = "image/jpeg";
ValidateCodeFun.CreateValidateCode(4);
}
当中LogOnModel是专门为登录进行设计的业务模型，
public class LogOnModel
{
[Required(ErrorMessage = "请填写username")]
[DisplayName("username")]
public string PersonName { get; set; }
[StringLength(100, ErrorMessage = "{0} 必须至少包括 {2} 个字符。", MinimumLength = 3)]
[Required(ErrorMessage = "请填写password")]
[DataType(DataType.Password)]
[DisplayName("password")]
public string Password { get; set; }
[Required(ErrorMessage = "请填写验证码")]
[DisplayName("验证码")]
public string ValidateCode { get; set; }
[DisplayName("记住我?")]
public bool RememberMe { get; set; }
}
关于验证码类，我就不多说了，大家都懂，我这里直接贴代码，例如以下：
public static class ValidateCodeFun
{
public static void CreateValidateCode(int codeNum)
{
string vnum= GetByRndNum(codeNum);
Bitmap Img = null;
Graphics g = null;
Random random = new Random();
int gheight = vnum.Length * 16;
Img = new Bitmap(gheight, 26);
g = Graphics.FromImage(Img);
//Font f = new Font("微软雅黑", 16, FontStyle.Bold);
Color[] c = { Color.SpringGreen, Color.Red, Color.LightBlue, Color.SeaGreen, Color.Orange, Color.Yellow, Color.RosyBrown };
Font f = new Font("宋体", 16, FontStyle.Bold);
g.Clear(Color.White);//设定背景色
//Pen blackPen = new Pen(ColorTranslator.FromHtml("#e1e8f3"), 18);
Pen blackPen = new Pen(c[random.Next(7)], 18);
//绘图片的前景噪音点
for (int i = 0; i < 80; i++)
{
int x = random.Next(Img.Width);
int y = random.Next(Img.Height);
Img.SetPixel(x, y, Color.FromArgb(random.Next()));
}
for (int i = 0; i < 128; i++)// 随机产生干扰线，使图象中的认证码不易被其他程序探測到
{
int x = random.Next(gheight);
int y = random.Next(20);
int xl = random.Next(6);
int yl = random.Next(2);
g.DrawLine(blackPen, x, y, x + xl, y + yl);
}
SolidBrush s = new SolidBrush(ColorTranslator.FromHtml("#411464"));
g.DrawString(vnum, f, s, 1, 1);
//画边框
blackPen.Width = 1;
g.DrawRectangle(blackPen, 0, 0, Img.Width - 1, Img.Height - 1);
Img.Save(HttpContext.Current.Response.OutputStream, ImageFormat.Jpeg);
s.Dispose();
f.Dispose();
blackPen.Dispose();
g.Dispose();
Img.Dispose();
//Response.End();
}
//-----------------给定范围获得随机颜色
static Color GetByRandColor(int fc, int bc)
{
Random random = new Random();
if (fc > 255)
fc = 255;
if (bc > 255)
bc = 255;
int r = fc + random.Next(bc - fc);
int g = fc + random.Next(bc - fc);
int b = fc + random.Next(bc - bc);
Color rs = Color.FromArgb(r, g, b);
return rs;
}
//取随机产生的认证码(数字)
public static string GetByRndNum(int VcodeNum)
{
string VNum = "";
Random rand = new Random();
for (int i = 0; i < VcodeNum; i++)
{
VNum += VcArray[rand.Next(0, 61)];
}
HttpContext.Current.Session["_VCode"] = VNum.ToLower();
return VNum;
}
private static readonly string[] VcArray =
new string[] {"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f","g","h","i",
"j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","A","B","C","D","E","F","G",
"H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z" };
}最后，看下视图View，新建View方法例如以下：
View十分简单，这里我就不多说，自己看代码，例如以下：
@model YKT.Model.LogOnModel
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head id="Head1">
<title>企业平台登录</title>
<link href="@Url.Content("~/Content/Login.css")" rel="stylesheet" type="text/css" />
<script type="text/javascript">
function RefreshValidateCode(obj) {
obj.src = "/Account/ValidateCode/" + Math.floor(Math.random() * 10000);
}
</script>
</head>
<body>
@using (Html.BeginForm((string)ViewBag.FormAction, "Account"))
{
<div class="login">
<div class="top">
</div>
<div class="middle">
<div class="left">
<img alt="登录" src="images/login_pic.gif"></div>
<div class="right">
<div class="right2">
<fieldset style="border-top: 0px; border-left: #e8e8e8 1px solid; border-right: #e8e8e8 1px solid;
border-bottom: #e8e8e8 1px solid;">
<div class="editor-label">
username：
</div>
<div class="personname">
@Html.TextBoxFor(m => m.PersonName)
</div>
<div class="editor-label">
密 码：
</div>
<div class="password">
@Html.PasswordFor(m => m.Password)
</div>
<div class="editor-label" >
验证码：
</div>
<div class="validatecode">
@Html.TextBoxFor(m => m.ValidateCode, new { MaxLength = "4",@class="easyui-validatebox",required="true",
missingMessage="不能为空"})
<img alt="点击刷新验证码！" title="点击刷新验证码！" src="Account/ValidateCode" style="cursor: pointer;"
onclick="RefreshValidateCode(this);" />
</div>
<p>
<input class="submitcss" type="submit" value="登录系统" />
<span style="display:none">
@Html.CheckBoxFor(m=>m.RememberMe,"记住我")
@Html.LabelFor(m=>m.RememberMe)
</span>
</p>
<p>
@Html.ValidationMessageFor(m => m.PersonName)<br />
@Html.ValidationMessageFor(m => m.Password)
</p>
</fieldset>
</div>
</div>
</div>
<div class="bottom">
</div>
</div>
}
</body>
</html>