業(yè)務系統(tǒng)實現(xiàn)記住密碼和自動登錄功能

　　公司的業(yè)務系統(tǒng)本來是受域控的，用戶不需要登錄可以直接訪問系統(tǒng)。當然，雖然不用人工登錄，系統(tǒng)本身會讀取電腦的用戶名為登錄標識，對系統(tǒng)操作權限和記錄也是以電腦名。近段時間，由于系統(tǒng)要牽到云端，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(yè)務系統(tǒng)沒什么區(qū)別。但是由于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(tǒng)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(xiàn)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，至于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(tǒng)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相當于刪掉了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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轉載于:https://www.cnblogs.com/zknu/p/3359303.html

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