WEB简单数据操作练习

 主要学习代码:

Login.aspx:

    <!--第一种方式-->
    <%--  <script type="text/javascript">
        function Go() {
            var name = document.getElementById("txtName");
            var pwd = document.getElementById("txtPwd");
            var code = document.getElementById("txtCode");
            if (name.value == "") {
                alert("请输入用户名");
            }
            else if (pwd.value == "") {
                alert("请输入密码");
            }
            else if (code.value == "") {
                alert("请输入验证码");
            }
            else {
                //哈哈,不知道怎么了这里用不了链式编程了
                var btn = document.getElementById("btnLogin");
                btn.setAttribute("type", "submit");
                btn.onsubmit;
            }
        };
    </script>--%>
    <script type="text/javascript">
        function Go() {
            var name = document.getElementById("txtName");
            var pwd = document.getElementById("txtPwd");
            var code = document.getElementById("txtCode");
            if (name.value == "") {
                alert("请输入用户名");
                return false;
            }
            else if (pwd.value == "") {
                alert("请输入密码");
                return false;
            }
            else if (code.value == "") {
                alert("请输入验证码");
                return false;
            }
            return true;
        };
    </script>
    <style type="text/css">
        .input {
            font-size: 16px;
            width: 150px;
            margin: 3px;
            vertical-align: text-bottom;
        }
    </style>
</head>
<body>
    <div id="Login" style=" 350px; height: 150px; background-color: #00ff21; padding: 5px; position:fixed;top:50%;left:50%;margin:-100px 0 0 -175px;">
        <form method="post" action="Login.aspx">
            用户名:<input class="input" type="text" name="txtName" id="txtName" /><br />&nbsp;&nbsp;码:<input class="input" type="password" name="txtPwd" id="txtPwd" /><br />
            验证码:<input class="input" type="text" name="txtCode" id="txtCode" /><img src="VerifyCode.ashx" onclick="this.src='VerifyCode.ashx?times='+new Date();" title="点击更换验证码" alt="验证码" style="height: 40px; margin-left: 10px;" /><br />
            <div style="float: left; margin: 8px;">
                <!--第一种方式-->
                <%--<input type="button" value="登录" id="btnLogin" onclick="Go()"/>--%><!--不能用submit作为名字--><input type="checkbox" name="chkAuto" id="chkAuto" /><label for="chkAuto">一周内自动登录</label>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" value="登录" onclick="return Go()" style="margin-right: 18px; float: right;" />
            </div>
        </form>
    </div>
</body>

Login.aspx.cs

public partial class Login : System.Web.UI.Page
{
    Web.BLL.TransferAction action = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        //刷新登录。。。
        string name, code, pwd;
        code = Request.Form["txtCode"];
        if (null == Request.Cookies["cName"] && Request.Cookies["cPwd"] == null)
        {
            if (code != null)
            {
                if (code == Session["code"].ToString().ToLower())
                {
        name = Request.Form["txtName"];
                    pwd = Request.Form["txtPwd"];
                    action = new Web.BLL.TransferAction();
                    if (action.IsExist(name, pwd))
                    {
                        if (Request.Form["chkAuto"] != null)//选中 on
                        {
                            //实际(加密[user+Identity+key+...])并不是这样实现自动登录的,只是简单原理仅供学习。
                            HttpCookie cookieName = new HttpCookie("cName", name);
                            HttpCookie cookiePwd = new HttpCookie("cPwd");
                            cookiePwd.Value = pwd;
                            cookiePwd.Expires = DateTime.Now.AddMinutes(10);
                            cookieName.Expires = DateTime.Now.AddMinutes(10);
                            Response.Cookies.Add(cookieName);
                            Response.Cookies.Add(cookiePwd);//已经向浏览器发送了Cookie。
                        }
                        Session["name"] = name;
                        // Response.Cookies.Add(cookiePwd);后UrlReferrer不为null
                        Response.Redirect("List.aspx");
                    }
                    else
                    {
                        Response.Write("<script>alert("用户名或密码错误。");</script>");
                    }
                }
                else
                {//向浏览器输出js脚本
                    //// 第一个参数产生随机键
                    //但是必须是<form runat="server" />
                    //Page.ClientScript.RegisterClientScriptBlock(this.GetType(), Guid.NewGuid().ToString(), "alert("验证码错误。");", true);
                    //Page.ClientScript.registerstartupscript(this.gettype(), guid.newguid().tostring(), "alert("验证码错误。");", true);
                    Response.Write("<script>alert('验证码错误')</script>");
                }
            }
        }
        else
        {
            action = new Web.BLL.TransferAction();
            if (action.IsExist(Request.Cookies["cName"].Value, Request.Cookies["cPwd"].Value))
            {
                Session["name"] = Request.Cookies["cName"].Value;
                //这里没有向浏览器输出任何东西,所以List的UrlReferrer为null
                //Response.Redirect("List.aspx");
                //所以不用上面的用下面的
                Response.Write("自动登录成功,<span id='span' style="color:red;">3</span> 秒后跳转。<script>var sec=2; setInterval(function (){if(sec<0){window.location='List.aspx';}else{document.getElementById("span").innerHTML=sec;sec--;}},1000);</script>");
                //停止执行页面。
                Response.End();
            }
            else
            {
                Response.Write("<script>alert("自动登录失败,请手动登录.");</script>");
            }
        }
    }
}

List.aspx

   <style type="text/css">
        .head {
            width: 250px;
            margin: 30px auto;
        }

        table {
            border-left: 1px solid #000;
            border-top: 1px solid #000;
            margin: 10px auto;
            padding: 0px;
            width: 500px;
            text-align: center;
        }

        td {
            border-right: 1px solid #000;
            border-bottom: 1px solid #000;
            padding: 5px;
        }
    </style>
</head>
<body>
    <form id="form1">
        <div class="head">姓名:<%=Web.Model.Users.USER!=null?Web.Model.Users.USER.Name:"" %> &nbsp;&nbsp;&nbsp;&nbsp;学号:<%=Web.Model.Users.USER!=null?Web.Model.Users.USER.Num:"" %></div>
        <div>
            <table cellspacing="0">
                <tr>
                    <td>ID</td>
                    <td>C#</td>
                    <td>SQL</td>
                    <td>ASP.NET</td>
                    <td>Edit</td>
                </tr>
                <%Response.Write(sb.ToString()); %>
            </table>
        </div>
    </form>
</body>

List.aspx.cs

 public System.Text.StringBuilder sb = new System.Text.StringBuilder(100);

    protected void Page_Load(object sender, EventArgs e)
    {
        
        //window.location=下有UrlReferrer吗? 答案:YES
        if (Session["name"] != null && Request.UrlReferrer.ToString().Contains("Login.aspx"))
        {
            sb.Append("<tr><td>");
            sb.Append(Web.Model.Users.USER.ID.ToString());
            sb.Append("</td><td>");
            if (Web.Model.Users.USER.sNUM != null)
            {
                sb.Append(Web.Model.Users.USER.sNUM.CSharp == null ? "" : Web.Model.Users.USER.sNUM.CSharp.ToString());
                sb.Append("</td><td>");
                sb.Append(Web.Model.Users.USER.sNUM.SQL == null ? "" : Web.Model.Users.USER.sNUM.SQL.ToString());
                sb.Append("</td><td>");
                sb.Append(Web.Model.Users.USER.sNUM.ASPNET == null ? "" : Web.Model.Users.USER.sNUM.ASPNET.ToString());
            }
            else
            {
                sb.Append("</td><td></td><td>");
            }
            sb.Append("</td><td>");
            sb.Append("<a href='Edit.aspx?access=" + Web.Model.Users.USER.Access + "'>编辑</a>");
            sb.Append("</td></tr>");
        }
        else
        {
            Response.Redirect("Forbidden.aspx");
        }
    }

Modify.aspx.cs

  private Web.BLL.TransferAction action = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Request.UrlReferrer != null && Request.UrlReferrer.ToString().Contains("Edit.aspx?access="))
        {
            int result = 0;
            //提交表单时有空的情况?
            //管理员
            string name = Request.Form["txtMName"];
            string pwd = Request.Form["txtMPwd"];
            string num = Request.Form["txtMNum"];
            //用户
            string access = Request.Form["txtMAccess"];
            //Score
            string csharp = Request.Form["txtMCSharp"];
            string sql = Request.Form["txtMSQL"];
            string aspnet = Request.Form["txtMASPNET"];
            //id
            string id = Request.Form["id_Modify"];
            //
            if (csharp == null)
            {
                Web.Model.Users user = new Web.Model.Users();
                user.Name = name;
                user.Pwd = pwd;
                user.Num = num;
                user.Access = access == null ? null : (bool?)(bool.Parse((access == "0" ? "false" : "true")));
                user.ID = int.Parse(id);
                action = new Web.BLL.TransferAction();
                //重点:
                //事实上你修改了用户密码:要重新向客户端重置Cookie
                result = action.Modify(user);
                if (result == 1)
                {
                    HttpCookie cname = new HttpCookie("cName", num);
                    HttpCookie cpwd = new HttpCookie("cPwd", pwd);
                    cname.Expires = DateTime.Now.AddHours(7);
                    cpwd.Expires = DateTime.Now.AddHours(7);
                    Response.Cookies.Add(cname);
                    Response.Cookies.Add(cpwd);
                }
            }
            else
            {
                Web.Model.Score score = new Web.Model.Score();
                score.CSharp = csharp == "" ? null : (int?)int.Parse(csharp);
                score.SQL = sql == "" ? null : (int?)int.Parse(sql);
                score.ASPNET = aspnet == "" ? null : (int?)int.Parse(aspnet);
                score.ID = int.Parse(id);
                action = new Web.BLL.TransferAction();
                result = action.Modify(score);
            }
            //action = new Web.BLL.TransferAction();
            if (result == 1)
            {
                Response.Write("数据修改成功,<span id="sInfo" style="color:red;">3</span>秒后,自动跳转。<script>var s=3;setInterval(function(){if(s<0){window.location='Edit.aspx?access=true';}else{document.getElementById("sInfo").innerHTML=s;s--;}},1000);</script>");
            }
            else
            {
                //数据插入失败。
                Response.Write("数据修改失败,<span id="sInfo" style="color:red;">3</span>秒后,自动跳转。<script>var s=3;setInterval(function(){if(s<0){window.location='Edit.aspx?access=true';}else{document.getElementById("sInfo").innerHTML=s;s--;}},1000);</script>");
            }
        }
        else
        {
            Response.Redirect("Forbidden.aspx");
        }
    }

Edit.aspx

  <style type="text/css">
        div p {
            font-size: xx-large;
            color: #ff006e;
            text-align: center;
        }

        table {
            /*border-left: 1px solid #000;
            border-top: 0px solid #000;*/
            border: none;
            margin: 0px auto;
            padding: 3px;
        }

        td {
            border-left: 1px solid #000;
            border-right: 1px solid #000;
            border-bottom: 1px solid #f00;
            padding: 5px;
            text-align: center;
            width: 100px;
        }
    </style>
    <script type="text/javascript">
        function Show() {
            document.getElementById(arguments[0]).style.display = "block";
        };
        function Cancel(id) {
            document.getElementById(id).style.display = "none";
        };
        function Del(id) {
            //这里没有AJAX的异步请求滴。很假很假的模拟。
            if (confirm("确定删除吗?")) {
                window.location = "Del.aspx?id=" + id;
            }
        };
        function tbl(innerHtml) {
            document.getElementById("tbl").innerHTML = innerHtml;
        };
        function GO() {
            //3个公共的输入框
            if (document.getElementById(arguments[0]).value == "") {
                alert("请输入名字"); return false;
            }
            if (document.getElementById(arguments[1]).value == "") {
                alert("请输入密码"); return false;
            }
            if (document.getElementById(arguments[2]).value == "") {
                alert("请输入学号"); return false;
            }
            //非管理员的修改/添加用户
            if (arguments.length == 4 || document.getElementById("txtMAccess")) {//
                var c = true;
                if (arguments[3] != "txtAccess") {
                    if (document.getElementById("txtMAccess").value == "")
                        c = false;
                }
                else {//添加用户
                    if (document.getElementById("txtAccess").value == "")
                        c = false;
                }
                if (!c) {
                    alert("请输入权限"); return false;
                }
            }
            return true;
        };
        //可行否?:href='javascript:Show();GetTrObj();';//答案:YES。
        //弹出层显示
        function GetTrObj() {
            var tr, innerHtml;
            if (arguments[0] == "u") {//u:用户
                innerHtml = <%=tblU %>
                tr = document.getElementById("u" + arguments[1]);
                if (tr.childNodes[tr.childElementCount - 2].textContent == "0") {//非管理员,没有设计对管理员的权限修改
                    innerHtml += <%=tblUAdd%>
                    tbl(innerHtml);
                    document.getElementById("txtMAccess").value = 0;
                }
                else
                    tbl(innerHtml);
                document.getElementById('txtMName').value = tr.childNodes.item(1).textContent;
                document.getElementById('txtMPwd').value = tr.children.item(2).innerHTML;
                document.getElementById('txtMNum').value = tr.childNodes[3].innerText;
                //给事件动态传递参数
                //提取修改 管理员3个 用户4个 的公共输入框不能为空。
                document.getElementById("sub").onclick = function () { return GO('txtMName', 'txtMPwd', 'txtMNum'); };
            }
            else {//s:成绩
                innerHtml = <%=tblS%>
                tr = document.getElementById("s" + arguments[1]);
                tbl(innerHtml);
                document.getElementById('txtMCSharp').value = tr.childNodes.item(2).textContent;
                document.getElementById('txtMSQL').value = tr.children.item(3).innerHTML;
                document.getElementById('txtMASPNET').value = tr.childNodes[4].innerText;
                //Score修改
                //因为成绩是可为null 可以直接submit->post  不用GO验证
            }
            //表单ID
            document.getElementById("id_Modify").value = arguments[1];
        };
    </script>
</head>
<body>
    <!--none-->
    <input type="hidden" value="<%=json %>" />
    <div id="hidden" style="display: none;">
        <div>
            <p>管理员编辑页面</p>
        </div>
        <form id="form1">
            <table cellspacing="0" style="margin-top: 60px;">
                <tr style="border-bottom: 1px; padding: 10px;">
                    <td colspan="5" style="text-align: left; padding-left: 60px; padding-bottom: 15px; border-right: none; border-left: none;">管理员:&nbsp;<%=(Web.Model.Users.USER!=null&&access!=null)?Web.Model.Users.USER.Name:"" %></td>
                    <td style="text-align: center; padding-bottom: 15px; border-right: none; border-left: none;"><a href="javascript:Show('Add');">添加</a></td>
                </tr>
                <tr>
                    <td>ID</td>
                    <td>Name</td>
                    <td>Pwd</td>
                    <td>Number</td>
                    <td>Access</td>
                    <td>编辑</td>
                </tr>
                <%=sbUser %>
            </table>
            <table cellspacing="0" style="margin-top: 80px;">
                <tr>
                    <td colspan="6" style="text-align: center; padding-bottom: 15px; border-left: none; border-right: none;">成绩列表</td>
                </tr>
                <tr>
                    <td>ID</td>
                    <td>Number</td>
                    <td>C#</td>
                    <td>SQL</td>
                    <td>ASP.NET</td>
                    <td>编辑</td>
                </tr>
                <%=sbScore %>
            </table>
        </form>
    </div>
    <!--Add-->
    <div id="Add" style=" 500px; height: 170px; top: 50%; left: 50%; margin: -100px 0 0 -250px; position: fixed; display: none; z-index: 101; background-color: #808080; opacity: 0.9;">
        <br />
        <!--什么也没写到本页面-->
        <form action="Add.aspx" method="post" id="frmAdd">
            <div style="text-align: center; padding: 10px;">
                姓名:<input type="text" name="txtName" id="txtName" />
                密码:<input type="text" name="txtPwd" id="txtPwd" /><br />
                学号:<input type="text" name="txtNum" id="txtNum" />
                权限:<input type="text" name="txtAccess" id="txtAccess" value="0" /><br />
                &nbsp;&nbsp;&nbsp;C#:<input type="text" name="txtCSharp" id="txtCSharp" />
                &nbsp;SQL:<input type="text" name="txtSQL" id="txtSQL" /><br />
                ASP.Net:<input type="text" name="txtASPNET" id="txtASPNET" />
            </div>
            <div style=" auto; float: right; margin: 10px auto; padding: 2px;">
                <!--添加7个输入框 参数中的4个不能为空-->
                <input type="submit" value="确定" id="btnOK" onclick="return GO('txtName', 'txtPwd', 'txtNum', 'txtAccess')" />&nbsp;&nbsp;<input type="button" value="取消" id="btnCancel" onclick="    javascript: Cancel('Add');" />&nbsp;&nbsp;
            </div>
        </form>
    </div>
    <!--Modify-Admin-->
    <div id="A_Modify" style="display: none;  300px; height: 180px; background-color: #0b9b05; opacity: 0.9; left: 50%; top: 50%; margin: -90px 0 0 -150px; position: fixed;">
        <form action="Modify.aspx" method="post">
            <input type="hidden" name="id_Modify" id="id_Modify" />
            <div id="tbl" style=" 202px; height: auto; margin: 0 auto; padding-top: 28px;">
            </div>
            <div style="margin-top: 20px; float: right; margin-right: 40px;">
                <input type="submit" value="确定" id="sub" />
                <input type="button" value="取消" onclick="javascript: Cancel('A_Modify');" />
            </div>
        </form>
    </div>
    <div style="text-align: center; bottom: 10px; margin-top: 100px;">
        <span>管理员请谨慎操作</span>
    </div>
</body>

Edit.aspx.cs

    protected string json;
    public string tblU = "'姓名:<input type="text" name="txtMName" id="txtMName"/><br />密码:<input type="text" name="txtMPwd" id="txtMPwd" /><br />学号:<input type="text" name="txtMNum" id="txtMNum" /><br />';";
    public string tblUAdd="'权限:<input type="text" name="txtMAccess" id="txtMAccess" /><br />';";
    public string tblS = "'C#:<input type="text" name="txtMCSharp" id="txtMCSharp"/><br />SQL:<input type="text" name="txtMSQL" id="txtMSQL"/><br />ASP.NET:<input type="text" name="txtMASPNET" id="txtMASPNET" /><br />';";
    private List<Web.Model.Users> lsUsers = null;
    public Dictionary<int, Web.Model.Users> dUS = null;
    public object access = null;
    public System.Text.StringBuilder sbUser, sbScore;
    private Web.BLL.TransferAction action = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        access = Request.QueryString["access"];
        //这里为什么一直请求。
        if (access != null && bool.Parse(access.ToString()) == true && Request.UrlReferrer != null)
        {
            //显示body
            Response.Write("<script>window.onload=function(){document.getElementById("hidden").style.display = "block";};</script>");
            action = new Web.BLL.TransferAction();
            //1.得到所有的Users和Score
            lsUsers = action.GetUsers();

            //JavaScriptSerializer js = new JavaScriptSerializer();
            //json = js.Serialize(lsUsers);
            // JavaScriptConverter
            if (lsUsers != null)
            {
                sbUser = new System.Text.StringBuilder(300);
                sbScore = new System.Text.StringBuilder(500);
            }
            foreach (Web.Model.Users item in lsUsers)
            {
                //为获取tr对象
                sbUser.Append("<tr id="u" + item.ID + ""><td>");
                sbUser.Append(item.ID);
                sbUser.Append("</td><td>");
                sbUser.Append(item.Name);
                sbUser.Append("</td><td>");
                sbUser.Append(item.Pwd);
                sbUser.Append("</td><td>");
                sbUser.Append(item.Num);
                sbUser.Append("</td><td>");
                if (item.Access == true)
                {
                    sbUser.Append(1);
                    sbUser.Append("</td><td>");
                    //管理员的话没有删除。假定只有一个管理员,
                    //扩展的话可以修改Access:但是
                    //查询出来的Access==true的count必须大于1
                    sbUser.Append("<a href='javascript:Show("A_Modify"," + item.ID + ");GetTrObj("u"," + item.ID + ");'>修改</a>");
                }
                else
                {
                    sbUser.Append(0);
                    sbUser.Append("</td><td>");
                    sbUser.Append("<a href='javascript:Show("A_Modify"," + item.ID + ");GetTrObj("u"," + item.ID + ");'>修改</a>&nbsp;&nbsp;<a href='javascript:Del(" + item.ID + ");'>删除</a>");
                }
                sbUser.Append("</td></tr>");
                if (item.sNUM != null)
                {
                    sbScore.Append("<tr id="s" + item.sNUM.ID + ""><td>");
                    sbScore.Append(item.sNUM.ID);
                    sbScore.Append("</td><td>");
                    sbScore.Append(item.sNUM.Number);
                    sbScore.Append("</td><td>");
                    sbScore.Append(item.sNUM.CSharp);
                    sbScore.Append("</td><td>");
                    sbScore.Append(item.sNUM.SQL);
                    sbScore.Append("</td><td>");
                    sbScore.Append(item.sNUM.ASPNET);
                    sbScore.Append("</td><td>");
                    sbScore.Append("<a href='javascript:Show("A_Modify"," + item.ID + ");GetTrObj("s"," + item.sNUM.ID + ");'>修改</a>");
                    // sbScore.Append("</td><td>");
                    sbScore.Append("</td></tr>");
                }
            }
            // dUS = action.GetUsersAndScore();
            //2.连接成字符串显示

        }
        else
        {
            //用一个公用方法更好。
            Response.Write("请用管理员身份登录,<span id='span' style="color:red;">3</span> 秒后回到登录页面。<script>var sec=2; setInterval(function (){if(sec<0){window.location='Login.aspx';}else{document.getElementById("span").innerHTML=sec;sec--;}},1000);</script>");
            Response.End();
        }
    }

Web.BAL

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Web.BAL
{
    public class SQLAction
    {
        private SqlHelper helper = null;
        public SQLAction()
        {
            helper = new SqlHelper();
        }

        private Web.Model.Users users = null;
        //重点:
        //      关联表的对象就不能在这里置null了,
        //private Web.Model.Score score = null;

        private Dictionary<Web.Model.Users, Web.Model.Score> dUS = null;
        private List<Web.Model.Users> lsUsers = null;

        public bool IsExist(string number, string pwd)
        {
            return this.GetUser(number, pwd) != null;
        }

        public Web.Model.Users GetUser(string number, string pwd)
        {
            string sql = "select * from tblUsers where  u_Number=@num and u_Pwd=@pwd";
            SqlParameter[] param = { new SqlParameter("@num", number), new SqlParameter("@pwd", pwd) };
            using (SqlDataReader reader = helper.ExecuteDataReader(sql, param))
            {
                if (reader.HasRows)
                {
                    while (reader.Read())
                    {
                        users = new Model.Users();
                        users.ID = reader.GetInt32(0);
                        users.Name = reader.GetString(1);
                        users.Pwd = reader.GetString(2);
                        users.Num = reader.GetString(3);
                        // users.Number = this.GetScore(number);
                        //耗能。
                        //Web.Model.Users.Number = this.GetScore(number);
                        users.sNUM = this.GetScore(number);
                        users.Access = (bool?)reader.GetBoolean(4);
                        Web.Model.Users.USER = users;
                    }
                }
            }
            return users;
        }
        private Web.Model.Score GetScore(string number)
        {
             Web.Model.Score score = null;
            string sql = "select * from TblScore where s_Number=@num";
            //此时还能调用reader? 答案:YES
            using (SqlDataReader reader = helper.ExecuteDataReader(sql, new SqlParameter("@num", number)))
            {
                if (reader.HasRows)
                {
                    score = new Model.Score();
                    while (reader.Read())
                    {
                        score.ID = reader.GetInt32(0);
                        score.Number = reader.GetString(1);
                        score.CSharp = reader.IsDBNull(2) ? null : (int?)reader.GetInt32(2);
                        score.SQL = reader.IsDBNull(3) ? null : (int?)reader.GetInt32(3);
                        score.ASPNET = reader.IsDBNull(4) ? null : (int?)reader.GetInt32(4);
                    }
                }
            }
            return score;
        }
        /// <summary>
        /// 这个走极端了
        /// </summary>
        /// <returns></returns>
        public Dictionary<Web.Model.Users, Web.Model.Score> GetUsersAndScore()
        {
            string sql = "select * from tblUsers";
            System.Data.DataTable dt = helper.ExecuteDataTable(sql);
            if (dt.Rows.Count > 0)
            {
                dUS = new Dictionary<Web.Model.Users, Web.Model.Score>();
                foreach (System.Data.DataRow item in dt.Rows)
                {
                    users = new Web.Model.Users();
                    //根据数据库设计这里不判断IsNull了。
                    users.ID = int.Parse(item[0].ToString());
                    users.Name = item[1].ToString();
                    users.Pwd = item[2].ToString();
                    //users.Num = item[3].ToString();
                    //看看item[4]是什么 数字--boolean
                    users.Access = bool.Parse(item[4].ToString());
                    //添加value值为null是什么情况?
                    //key相同不相同
                    dUS.Add(users, this.GetScore(item[3].ToString()));
                }
            }
            return dUS;
        }
        // 这样移植性大大降低了。
        // public List<Web.Model.Users> GetUsers(Dictionary<int, Web.Model.Users> dUS)
        public List<Web.Model.Users> GetUsers()
        {
            string sql = "select * from tblUsers";
            System.Data.DataTable dt = helper.ExecuteDataTable(sql);
            if (dt.Rows.Count > 0)
            {
                lsUsers = new List<Web.Model.Users>();
                foreach (System.Data.DataRow item in dt.Rows)
                {
                    users = new Web.Model.Users();
                    //根据数据库设计这里不判断IsNull了。
                    users.ID = int.Parse(item[0].ToString());
                    users.Name = item[1].ToString();
                    users.Pwd = item[2].ToString();
                    users.Num = item[3].ToString();
                    users.sNUM = this.GetScore(item[3].ToString());
                    //看看item[4]是什么 数字--boolean:答案布尔
                    users.Access = bool.Parse(item[4].ToString());
                    lsUsers.Add(users);
                    //dUS.Add(users.ID, users);
                }
            }
            return lsUsers;
        }

        public int Add(params string[] param)
        {
            //Add(name, pwd, num, access, csharp, sql, aspnet);
            string sqlU = "insert into tblUsers values(@name,@pwd,@num,@access)";
            SqlParameter[] paramU = { new SqlParameter("@name", param.GetValue(0)), new SqlParameter("@pwd", param[1]), new SqlParameter("@num", param.ElementAt(2)), new SqlParameter("@access", param[3]) };
            int tmp = helper.ExecuteNonQuery(sqlU, paramU);
            //
            if (param.Length > 4)
            {
                string sqlS = "insert into TblScore values(@num,@csharp,@sql,@aspnet)";
                SqlParameter[] paramS = { new SqlParameter("@num", param[2]), new SqlParameter("@csharp", param[4] == "" ? DBNull.Value : (object)param[4]), new SqlParameter("@sql", param[5] == "" ? DBNull.Value : (object)param[5]), new SqlParameter("@aspnet", param[6] == "" ? DBNull.Value : (object)param[6]) };
                if (tmp == helper.ExecuteNonQuery(sqlS, paramS))
                    return 1;
                return 0;
            }
            return tmp;
        }
        public int Del(string id)
        {
            string sql = "delete from tblUsers where u_ID=@id";
            return helper.ExecuteNonQuery(sql, new SqlParameter("@id", int.Parse(id)));
        }

        public int Modify<T>(T obj)
        {
            string sql = string.Empty;
            SqlParameter[] param = null;
            if (obj is Web.Model.Users)
            {
                bool? acc = (obj as Web.Model.Users).Access;
                sql = "update  tblUsers set u_Name=@name,u_Pwd=@pwd,u_Number=@num,u_Access=@access where u_ID=@id";
                param = new SqlParameter[] {
                    new SqlParameter("@name",((Web.Model.Users)Convert.ChangeType(obj,typeof(Web.Model.Users))).Name),
                    new SqlParameter("@pwd",(obj as Web.Model.Users).Pwd),
                    new SqlParameter("@num",(obj as Web.Model.Users).Num),
                    //null 说明:管理员的修改,
                    new SqlParameter("@access",(acc==null?1:(acc==false?0:1))),
                    new SqlParameter("@id",(obj as Web.Model.Users).ID)
                        };
            }
            else
            {
                sql = "update  tblScore set s_C#=@cs,s_SQL=@sql,s_ASPNET=@aspnet where s_ID=@id";
                int? cs = (obj as Web.Model.Score).CSharp;
                int? SQL = (obj as Web.Model.Score).SQL;
                int? asp = (obj as Web.Model.Score).ASPNET;
                param = new SqlParameter[] { new SqlParameter("@cs", cs == null ? DBNull.Value : (object)cs) ,
                new SqlParameter("@sql",SQL==null?DBNull.Value:(object)SQL),
                new SqlParameter("@aspnet",asp==null?DBNull.Value:(object)asp),
                new SqlParameter("@id",(obj as Web.Model.Score).ID)};
            }

            return helper.ExecuteNonQuery(sql, param);
        }
    }
}

Web.Model

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Web.Model
{
    public class Users
    {
        public Users()
        {

        }
        /// <summary>
        /// 当前登录者
        /// </summary>
        public static Users USER { get; set; }

        private int id;
        /// <summary>
        /// ID
        /// </summary>
        public int ID
        {
            get { return id; }
            set { id = value; }
        }
        private string name;
        /// <summary>
        /// Name
        /// </summary>
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        private string pwd;
        /// <summary>
        /// pwd
        /// </summary>
        public string Pwd
        {
            get { return pwd; }
            set { pwd = value; }
        }
        private string num;
        /// <summary>
        /// number
        /// </summary>
        public string Num
        {
            get { return num; }
            set { num = value; }
        }
        
        //private static Score number;
        ///// <summary>
        ///// 当前登录者Score--number
        ///// </summary>
        //public static Score Number
        //{
        //    get { return number; }
        //    set { number = value; }
        //}
        private Score sNum;
        /// <summary>
        /// Score--Number
        /// </summary>
        public Score sNUM
        {
            get { return sNum; }
            set { sNum = value; }
        }
        
        private bool? access;
        /// <summary>
        /// access
        /// </summary>
        public bool? Access
        {
            get { return access; }
            set { access = value; }
        }

    }
    public class Score
    {
        public Score()
        {

        }
        private int id;
        /// <summary>
        /// id
        /// </summary>
        public int ID
        {
            get { return id; }
            set { id = value; }
        }
        private string number;
        /// <summary>
        /// number  
        /// </summary>
        public string Number
        {
            get { return number; }
            set { number = value; }
        }
        private int? csharp;
        /// <summary>
        /// C#
        /// </summary>
        public int? CSharp
        {
            get { return csharp; }
            set { csharp = value; }
        }
        private int? sql;
        /// <summary>
        /// sql
        /// </summary>
        public int? SQL
        {
            get { return sql; }
            set { sql = value; }
        }
        private int? aspnet;
        /// <summary>
        /// aspnet
        /// </summary>
        public int? ASPNET
        {
            get { return aspnet; }
            set { aspnet = value; }
        }

    }
}

项目文件:http://pan.baidu.com/s/1dDf5mlb

原文地址:https://www.cnblogs.com/wjshan0808/p/3663150.html