業務系統實現記住密碼和自動登錄功能


業務系統實現記住密碼和自動登錄功能

  公司的業務系統本來是受域控的,用戶不需要登錄可以直接訪問系統。當然,雖然不用人工登錄,系統本身會讀取電腦的用戶名為登錄標識,對系統操作權限和記錄也是以電腦名。近段時間,由於系統要牽到雲端,也就是不受域控了,那就需要每人手頭上都有賬號和密碼了,這個和一般的業務系統沒什么區別。但是由於用戶之前的習慣是不用登錄的,而且每天打開關閉的次數較多。OK,一般的系統登錄都會有個記住密碼的功能,但是,這還滿足不了用戶的需求,那么我們給用戶增加多一個自動登錄功能,類似QQ那樣,我上次訪問勾選了自動登錄功能,然后再次訪問就不用再去登錄了。

  先來看看原來讀取域用戶的代碼吧。

 string strname = HttpContext.Current.User.Identity.Name;//獲取到帶域名的用戶
        string name = HttpContext.Current.User.Identity.Name.Substring(HttpContext.Current.User.Identity.Name.IndexOf("\\") + 1, HttpContext.Current.User.Identity.Name.Length - HttpContext.Current.User.Identity.Name.IndexOf("\\") - 1);

很多童鞋這樣子獲取到的是空的,是因為web.config沒設置好。必須在配置文件<authentication mode="Windows">把mode的屬性設為Windows,具體位置在<configuration><system.web>里面。

  好吧,下面就來實現我們的記住密碼和自動登錄功能吧。給大家看看登錄界面吧。

先跟大家說說具體的功能吧

1、當用戶勾選記住密碼時,下次打開登錄頁面自動填充用戶名和密碼,用戶只需點擊登錄按鈕即可以登錄,當然,你也可以刪掉自動填充的密碼自己重新輸入,或者你用另外的用戶密碼登錄也行。
2、當用戶勾選自動登錄時,記住密碼也會自動被勾選上,因為只有記住了密碼才會有自動登錄,這是合理存在的。下次用戶打開登錄頁面時,將會自動驗證跳轉到驗證通過后的頁面,不再需要用戶去點擊登錄按鈕。

 先看看前端的簡要代碼,簡單點把需要用到的控件和js貼出來就好了,其它布局的就不貼出來了。js簡單解釋一下

<form runat="server">
<input type="hidden" id="hidPass" runat="server" />
<input type="text" runat="server" id="txtLoginName" />
<asp:TextBox runat="server" ID="txtPassWord" class="textwidthheigh" TextMode="Password"></asp:TextBox>
<input type="checkbox" runat="server" value="記住密碼" id="chkRemember" onclick="CheckRemember()" />
<input type="checkbox" runat="server" value="自動登錄" id="chkLogin" onclick="CheckLogin()" />
<asp:Button runat="server"  id="btnLogin"  onclick="btnLogin_Click"  />
<input type="button" id="btnClear" onclick="Clear()"  />
</form>
    <script type="text/javascript" language="javascript">
//頁面加載用戶名輸入框獲得焦點
document.getElementById(
"txtLoginName").focus(); function Clear() { //用戶點擊取消,清空用戶名和用戶密碼
document.getElementById(
"txtLoginName").value = ""; document.getElementById("txtPassWord").value = ""; } function CheckLogin() {   //用戶勾選自動登錄時,把記住密碼也勾選上
var remember = document.getElementById("chkRemember"); remember.checked = true; } function CheckRemember() { var remenber = document.getElementById("chkRemember"); var login = document.getElementById("chkLogin"); if (remenber.checked == false) { login.checked = false;         //用戶去掉記住密碼時,也把自動登錄去掉
} }
</script>

 

protected void Page_Load(object sender, EventArgs e)
{

if (!IsPostBack) {
         //獲取客戶端的Cookies,分別兩個cookies,一個登陸名,一個密碼
HttpCookie LoginNameCookie = Request.Cookies["Bic_LoginName"]; HttpCookie LoginPassCookie = Request.Cookies["Bic_Pass"]; if (LoginNameCookie != null) {             //登錄名的cookies不為空,填充登陸名
txtLoginName.Value
= LoginNameCookie.Value; } if (LoginPassCookie != null) {             //密碼cookies不為空,給密碼框和隱藏密碼框填充,當然我們的密碼是加密過才存到cookies去的,至於以藏文本框的作用后面就會看到
this.txtPassWord.Attributes.Add("value",LoginPassCookie.Value+""); hidPass.Value = LoginPassCookie.Value + "";//賦值給隱藏控件 chkRemember.Checked = true; }           //獲取是否有勾選自動登錄的cookies
HttpCookie Login
= Request.Cookies["Bic_LoginAuto"];           //當用戶在系統點擊退出時
if (Request["opFlag"] == "Exit") { this.txtPassWord.Attributes.Add("value", "");//把密碼去掉 chkRemember.Checked = false;//記住密碼去掉 HttpCookie loginNameCookie = Request.Cookies["Bic_LoginName"];//獲取登錄名cookies
HttpCookie loginPassCookie
= Request.Cookies["Bic_Pass"];//獲取密碼cookies
if (loginNameCookie != null) {               //把cookies時間設為-2相當於刪掉了cookies
loginNameCookie.Expires
= DateTime.Now.AddDays(-2); Response.Cookies.Set(loginNameCookie); } if (loginPassCookie != null) {               //把密碼的cookies也刪掉
loginPassCookie.Expires
= DateTime.Now.AddDays(-2); Response.Cookies.Set(loginPassCookie); }             //自動登錄cookies也一樣
HttpCookie login
= Request.Cookies["Bic_LoginAuto"]; if (login != null) { login.Expires = DateTime.Now.AddDays(-2); Response.Cookies.Set(login); } } else//用戶打開登錄界面時
{             //自動登錄cookies不為空,用戶名不為空,隱藏框密碼不為空
if (Login != null && txtLoginName.Value != "" && hidPass.Value != "") { SysUser user = new SysUser(); user.Login_Name = txtLoginName.Value; user.Login_Pass = hidPass.Value; int i = SysUserBLL.Login(user);//驗證登錄
if (i > 0) {                  //成功登錄跳轉到default.aspx頁面
Page.Session[
"Login_Name"] = user.Login_Name; HttpContext.Current.Session["Display_Name"] = SysUserBLL.getDisplayNameByname(user.Login_Name); Response.Write("<script>window.location='Default.aspx';</script>"); Response.End(); } } } }
}
//點擊登錄按鈕事件
protected void btnLogin_Click(object sender, EventArgs e)
        {
       //判斷是否為空
            if (txtLoginName.Value.Trim() != "" && txtPassWord.Text.Trim() != "")
            {
                SysUser user = new SysUser();
                user.Login_Name = txtLoginName.Value.Trim();
                user.Login_Pass = CommonHelper.MD5encipher(txtPassWord.Text.Trim());//MD5加密
                HttpCookie LoginNameCookie = Request.Cookies["Bic_LoginName"];
                HttpCookie LoginPassCookie = Request.Cookies["Bic_Pass"];
                if (LoginNameCookie != null)//如果是記住密碼情況
                {
                    if (txtLoginName.Value.Trim() == LoginNameCookie.Value.Trim())//讀取到cookies保存的用戶名和文本框用戶名相同,預防用戶又改動
                    {
                        if (LoginPassCookie != null)
                        {
                            if (txtPassWord.Text.Trim() == LoginPassCookie.Value.Trim())//cookies讀取到的密碼和文本框密碼相同
                            {
                                user.Login_Pass = txtPassWord.Text.Trim();
                            }
                           
                        }
                    }
                }
                int i = SysUserBLL.Login(user);//驗證登錄
                if (i > 0)
                {
                    if (chkRemember.Checked == true)//記住密碼
                    {
                        HttpCookie loginNameCookie = new HttpCookie("Bic_LoginName", user.Login_Name);
                        HttpCookie loginPassCookie = new HttpCookie("Bic_Pass", user.Login_Pass);
                        loginPassCookie.Expires = DateTime.Now.AddDays(1);
                        loginNameCookie.Expires = DateTime.Now.AddDays(1);
                        Response.Cookies.Add(loginNameCookie);
                        Response.Cookies.Add(loginPassCookie);
                        if (chkLogin.Checked == true)//自動登錄
                        {
                            HttpCookie Login = new HttpCookie("Bic_LoginAuto", "true");
                            Login.Expires = DateTime.Now.AddDays(1);
                            Response.Cookies.Add(Login);
                        }
                        else
                        {
                            HttpCookie Login = Request.Cookies["Bic_LoginAuto"];
                            if (Login != null)
                            {
                                Login.Expires = DateTime.Now.AddDays(-2);
                                Response.Cookies.Set(Login);
                            }
                        }
                    }
                    else//沒選記住密碼
                    {
                        HttpCookie loginNameCookie = Request.Cookies["Bic_LoginName"];
                        HttpCookie loginPassCookie = Request.Cookies["Bic_Pass"];
                        if (loginNameCookie != null)
                        {
                            loginNameCookie.Expires = DateTime.Now.AddDays(-2);
                            Response.Cookies.Set(loginNameCookie);
                        }
                        if (loginPassCookie != null)
                        {
                            loginPassCookie.Expires = DateTime.Now.AddDays(-2);
                            Response.Cookies.Set(loginPassCookie);
                        }
                    }
                    Page.Session["Login_Name"] = user.Login_Name;
                    HttpContext.Current.Session["Display_Name"] = SysUserBLL.getDisplayNameByname(user.Login_Name);
                    Response.Write("<script>window.location='Default.aspx';</script>");
                }
                else
                {
                    Response.Write("<script>alert('用戶名或密碼錯誤!');window.location='Login.aspx';</script>");
                }
            }
            else
            {
                Response.Write("<script>alert('請輸入賬號和密碼!');window.location='Login.aspx';</script>");
            }
        }


以上的注釋只是我個人的一些思路和理解,如有不正確之處,還望大牛指導指導啊。如覺得文章對你有幫助,請多多支持,你們的支持將會是我寫博客的動力。

 

  

 

 

  


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