EasyUI的增删查改(后台ASP.NET)

某某人曾经跟我说,你们做系统不就是增删查改吗。

是啊,很多时候我们就是把用户的数据同后台数据库进行增删查改的沟通。

但是,把CRUD(增删查改)做得好,可能也不是一件很简单的事,

这里要展现的是我现在能写出来最好的Demo了,水平有限,小弟在校学生一枚,还请各位看客多多指教。

 

Demo前台使用JQuery EasyUI 请求一般处理程序,一般处理程序调用BLL层方法,BLL==>DAL,一个简单三层的效果。

项目结构如图:

 

 

一、数据库表结构

    这里只创建一个UserInfo表,表中字段有:UserID,CardID,UPwd,UName,UAge,IsDel,AddDate

 

 

二、后台处理CRUD

    后台处理添加、删除(软删除)、编辑、查询(分页)。其中查询包括:分页和搜索处理所有有点麻烦,

    1、先介绍数据访问层(DAL)中的方法

        这里是,添加、删除、编辑、分页查询的方法。

        前台查询的参数存储在NameValueCollection中,然后在DAL层中的PreSearchParameter方法中把查询参数装配到sql语句和SqlParameter中,

        在DAL层中获取的数据是DataTable,然后在BLL层中转换成JSON格式的数据传给EasyUI展示。

        

View Code
  1 using System;
  2 using System.Text;
  3 using System.Data;
  4 using System.Data.SqlClient;
  5 using Dedeyi.Common;
  6 using System.Collections;
  7 using System.Collections.Generic;
  8 using System.Collections.Specialized;
  9 
 10 namespace Dedeyi.ZSF.DAL
 11 {
 12    public class UserInfoDAL
 13     {
 14          /// <summary>
 15         /// 增加一条数据
 16         /// </summary>
 17         public int Add(Dedeyi.ZSF.Model.UserInfo model)
 18         {
 19             StringBuilder strSql=new StringBuilder();
 20             strSql.Append("insert into UserInfo(");
 21             strSql.Append("CardID,UPwd,UName,UAge,IsDel,AddDate)");
 22             strSql.Append(" values (");
 23             strSql.Append("@CardID,@UPwd,@UName,@UAge,@IsDel,@AddDate)");
 24             strSql.Append(";select @@IDENTITY");
 25             SqlParameter[] parameters = {
 26                     new SqlParameter("@CardID", SqlDbType.VarChar,16),
 27                     new SqlParameter("@UPwd", SqlDbType.VarChar,64),
 28                     new SqlParameter("@UName", SqlDbType.NVarChar,16),
 29                     new SqlParameter("@UAge", SqlDbType.Int,4),
 30                     new SqlParameter("@IsDel", SqlDbType.Bit,1),
 31                     new SqlParameter("@AddDate", SqlDbType.SmallDateTime)};
 32             parameters[0].Value = model.CardID;
 33             parameters[1].Value = model.UPwd;
 34             parameters[2].Value = model.UName;
 35             parameters[3].Value = model.UAge;
 36             parameters[4].Value = model.IsDel;
 37             parameters[5].Value = model.AddDate;
 38 
 39             object obj = SQLHelper.ExecuteScalar(strSql.ToString(),parameters);
 40             if (obj == null)
 41             {
 42                 return 0;
 43             }
 44             else
 45             {
 46                 return Convert.ToInt32(obj);
 47             }
 48         
 49        }
 50 
 51        /// <summary>
 52        /// 删除用户
 53        /// </summary>
 54        /// <param name="keyid"></param>
 55         public void Del(int keyid) 
 56         {
 57             //此处软删除
 58             string s = "update UserInfo set IsDel=1 where UserID="+keyid;
 59             SQLHelper.ExecuteNoneQuery(s,null);
 60         }
 61 
 62             ///<summary>
 63         ///更新一条数据
 64         ///</summary>
 65         public bool Update(Dedeyi.ZSF.Model.UserInfo model)
 66         {
 67             StringBuilder strSql = new StringBuilder();
 68 
 69             strSql.Append("update [UserInfo] set ");
 70             strSql.Append(" CardID=@CardID,");
 71             strSql.Append(" UPwd=@UPwd,");
 72             strSql.Append(" UName=@UName,");
 73             strSql.Append(" UAge=@UAge ");
 74             //strSql.Append(" IsDel=@IsDel,");
 75             //strSql.Append("AddDate=@AddDate");
 76             strSql.Append(" where UserID=@UserID");
 77 
 78             SqlParameter[] parameters = {
 79                 new SqlParameter("@UserID", SqlDbType.Int,4),
 80                 new SqlParameter("@CardID", SqlDbType.VarChar,16),
 81                 new SqlParameter("@UPwd", SqlDbType.VarChar,64),
 82                 new SqlParameter("@UName", SqlDbType.NVarChar,16),
 83                 new SqlParameter("@UAge", SqlDbType.Int,4),
 84                 //new SqlParameter("@IsDel", SqlDbType.Bit,1),
 85                 //new SqlParameter("@AddDate", SqlDbType.DateTime),
 86             };
 87             parameters[0].Value = model.UserID;
 88             parameters[1].Value = model.CardID;
 89             parameters[2].Value = model.UPwd;
 90             parameters[3].Value = model.UName;
 91             parameters[4].Value = model.UAge;
 92             //parameters[5].Value = model.IsDel;
 93             //parameters[6].Value = model.AddDate;
 94 
 95             int rows = SQLHelper.ExecuteNoneQuery(strSql.ToString(),parameters);
 96             if (rows > 0)
 97             {
 98                 return true;
 99             }
100             else
101             {
102                 return false;
103             }
104         }
105 
106 
107         //分页相关的
108         #region 
109         /// <summary>
110         /// 获取条件查询数据行数
111         /// </summary>
112         /// <param name="nv">关键字,UName,UAge,在前台请求形成Hashtable作为参数时候要用到这个</param>
113         /// <returns>数据行数</returns>
114         public int GetSearchCount(NameValueCollection nv) 
115         {
116             string sc;
117             SqlParameter[] ps;
118             PreSearchParameter(nv, out sc, out ps);
119 
120             string sql = "select count(0) from UserInfo where " + sc;
121 
122             return Convert.ToInt32(SQLHelper.ExecuteScalar(sql, ps));
123         } 
124 
125        /// <summary>
126        /// 获取条件查询的分页数据
127        /// </summary>
128        /// <param name="index"></param>
129        /// <param name="size"></param>
130         /// <param name="nv">关键字,UName,UAge,在前台请求形成Hashtable作为参数时候要用到这个</param>
131        /// <returns></returns>
132         public DataTable GetSearchPage(int index, int size,NameValueCollection nv)
133         {
134             string f = "UserID,CardID,UPwd,UName,UAge,AddDate";
135             string o = "AddDate DESC";
136             return GetSearchePage(index,size,nv,f,o);
137         }
138        /// <summary>
139        /// 获取分页数据
140        /// </summary>
141        /// <param name="index">当前页</param>
142        /// <param name="size">每一页数据行数</param>
143        /// <param name="ht">查询条件key是字段,value是对应的值</param>
144        /// <param name="fieldList">要返回的字段</param>
145        /// <param name="orderby">排序规则不要order by ,如 AddDate desc,userid asc</param>
146        /// <returns></returns>
147         private DataTable GetSearchePage(int index, int size, NameValueCollection nv, string fieldList,string orderby) 
148         {
149             string sc ; //过滤条件
150             SqlParameter[] ps;
151             PreSearchParameter(nv,out sc,out ps);
152 
153             string sql = "select * from (select {0},ROW_NUMBER() over(order by {1}) as num from UserInfo where {2}) as tb";
154             sql += " where num between {3} and {4}";
155 
156             sql = string.Format(sql, fieldList, orderby, sc, (index - 1) * size + 1, index * size);
157 
158             return SQLHelper.GetDataTable(sql, ps);
159         }
160 
161        /// <summary>
162        /// 把查询参数转换为sql,和SqlParameter
163        /// </summary>
164         /// <param name="ht">关键字,UName,UAge,在前台请求形成Hashtable作为参数时候要用到这个</param>
165        /// <param name="sql"></param>
166        /// <param name="paras"></param>
167         private void PreSearchParameter(NameValueCollection nv, out string sql, out SqlParameter[] paras)
168         {
169             sql = " '1'='1' and IsDel=0";
170             List<SqlParameter> list = new List<SqlParameter>();
171             if (!string.IsNullOrEmpty(nv["UName"]))
172             {
173                 sql += " and UName like @UName";
174                 list.Add(new SqlParameter("@UName", "%" + nv["UName"] + "%"));
175             }
176 
177             int tAge;
178             if (int.TryParse(nv["UAge"],out tAge))
179             {
180                 sql += " and UAge=" + nv["UAge"];
181             }
182             paras = list.ToArray();
183         }
184 
185         #endregion
186     }
187 }

 

    2、然后在业务逻辑层,做一些逻辑处理(JSON格式转换、添加预设值)

      

View Code
 1 using Dedeyi.ZSF.DAL;
 2 using Dedeyi.ZSF.Model;
 3 using Dedeyi.Common;
 4 using System;
 5 using System.Collections.Specialized;
 6 
 7 namespace Dedeyi.ZSF.BLL
 8 {
 9    public class UserInfoBLL
10     {
11         UserInfoDAL dal=new UserInfoDAL();
12 
13        /// <summary>
14        /// 添加
15        /// </summary>
16        /// <param name="user"></param>
17        /// <returns></returns>
18        public int Add(UserInfo user) 
19        {
20            user.AddDate = DateTime.Now;
21            user.IsDel = false;
22            
23            return dal.Add(user);
24        }
25 
26         /// <summary>
27        /// 删除用户
28        /// </summary>
29        /// <param name="keyid"></param>
30        public void Del(int keyid) 
31        {
32             dal.Del(keyid);
33        }
34 
35           ///<summary>
36         ///更新一条数据
37         ///</summary>
38        public bool Update(Dedeyi.ZSF.Model.UserInfo model) 
39        {
40            return dal.Update(model);
41        }
42 
43        //分页相关的
44         #region 
45         /// <summary>
46         /// 获取条件查询数据行数
47         /// </summary>
48         /// <param name="ht">关键字,UName,UAge,在前台请求形成Hashtable作为参数时候要用到这个</param>
49         /// <returns>数据行数</returns>
50        public int GetSearchCount(NameValueCollection ht) 
51        {
52            return dal.GetSearchCount(ht);
53        }
54 
55        /// <summary>
56        /// 获取条件查询的分页数据
57        /// </summary>
58        /// <param name="index"></param>
59        /// <param name="size"></param>
60         /// <param name="ht">关键字,UName,UAge,在前台请求形成Hashtable作为参数时候要用到这个</param>
61        /// <returns>json格式的数据集</returns>
62        public string GetSearchPage(int index, int size,NameValueCollection ht)
63        {
64            return JSONHelper.DataTableToJson(dal.GetSearchPage(index,size,ht));
65        }
66 
67         #endregion
68 
69     }
70 }

    

    3、界面层的一般处理程序,处理一般请求

View Code
  1 using System.Web;
  2 using Dedeyi.Common;
  3 using Dedeyi.ZSF.Model;
  4 using Dedeyi.ZSF.BLL;
  5 using System;
  6 
  7 namespace WebApp.Handler
  8 {
  9     /// <summary>
 10     /// UserHandler 的摘要说明
 11     /// </summary>
 12     public class UserHandler : IHttpHandler,System.Web.SessionState.IRequiresSessionState
 13     {
 14         private HttpContext context;
 15         private UserInfoBLL bll =new UserInfoBLL();
 16 
 17         public void ProcessRequest(HttpContext context)
 18         {
 19             context.Response.ContentType = "text/plain";
 20 
 21             //权限检查
 22             //
 23             try
 24             {
 25                 string sType = context.Request["reqTypes"];
 26                 if (string.IsNullOrEmpty(sType))
 27                 {
 28                     context.Response.Write("参数错误");
 29                     return;
 30                 }
 31                 this.context = context;
 32 
 33                 switch (sType.ToLower())
 34                 {
 35                     case "add":
 36                         Add();
 37                         break;
 38                     case "del":
 39                         Del();
 40                         break;
 41                     case "update":
 42                         Update();
 43                         break;
 44                     case "search":
 45                         Search();
 46                         break;
 47 
 48                 }
 49             }
 50             catch (Exception ex) 
 51             {
 52                 context.Response.Write(new ReqMsg(false,ex.Message.ToString()));
 53             }
 54         }
 55         /// <summary>
 56         /// 获取用户ID
 57         /// </summary>
 58         /// <returns></returns>
 59         private int GetUserID() 
 60         {
 61             string s = context.Request["uid"];
 62             return StringHelper.GetInt(s);
 63         }
 64 
 65         /// <summary>
 66         /// 添加方法
 67         /// </summary>
 68         private void Add() 
 69         {
 70             UserInfo user=new UserInfo();
 71             int n= RequestHelper.FormToModel<UserInfo>(user,context.Request.Form);
 72             ReqMsg msg = new ReqMsg();
 73             
 74             msg.Success=n>2?bll.Add(user)>0:false;
 75 
 76             context.Response.Write(msg.ToString());
 77 
 78         }
 79 
 80         /// <summary>
 81         /// 更新
 82         /// </summary>
 83         private void Update() 
 84         {
 85             UserInfo user = new UserInfo();
 86             int n = RequestHelper.FormToModel<UserInfo>(user, context.Request.Form);
 87             ReqMsg msg = new ReqMsg();
 88 
 89             msg.Success = n > 2 ? bll.Update(user) : false;
 90 
 91             context.Response.Write(msg.ToString());
 92         }
 93 
 94         /// <summary>
 95         /// 删除
 96         /// </summary>
 97         private void Del() 
 98         {
 99             int i = GetUserID();
100             bll.Del(i);
101             ReqMsg msg = new ReqMsg(true, "ok");
102             context.Response.Write(msg.ToString());
103         }
104         /// <summary>
105         /// 查询
106         /// </summary>
107         private void Search() 
108         {
109             int index = StringHelper.GetInt(context.Request["page"], 1);
110             int page = StringHelper.GetInt(context.Request["rows"], 10);
111 
112             string s = bll.GetSearchPage(index,page,context.Request.Form);
113             int t = bll.GetSearchCount(context.Request.Form);
114 
115             context.Response.Write(RequestHelper.ResponseGridJSON(s,t));
116         }
117 
118         public bool IsReusable
119         {
120             get
121             {
122                 return false;
123             }
124         }
125     }
126 }

 

 

 

三、EasyUI前台展示

    前台方法主要是AJAX处理增删查改请求,创建工具菜单(可能工具权限显示部分但此次不考虑),

  

View Code
  1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApp.Default" %>
  2 
  3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  4 
  5 <html xmlns="http://www.w3.org/1999/xhtml">
  6 <head runat="server">
  7     <title></title>
  8     <link href="Scripts/EasyUI/themes/icon.css" rel="stylesheet" type="text/css" />
  9     <link href="Scripts/EasyUI/themes/default/easyui.css" rel="stylesheet" type="text/css" />
 10     <script src="Scripts/EasyUI/jquery-1.8.0.min.js" type="text/javascript"></script>
 11     <script src="Scripts/EasyUI/jquery.easyui.min.js" type="text/javascript"></script>
 12     <script src="Scripts/EasyUI/easyui-lang-zh_CN.js" type="text/javascript"></script>
 13     <script src="Scripts/Common.js" type="text/javascript"></script>
 14 
 15     <script type="text/javascript">
 16         var actionURL="handler/UserHandler.ashx";
 17         var CRUD =
 18         {
 19             Init: function () {
 20                 $('#dataTB').datagrid(
 21                  {
 22                      title: '用户列表',
 23                      iconCls: 'icon-reload',
 24                      width: 800,
 25                      //height: size.height,
 26                      nowrap: false,
 27                      collapsible: false,
 28                      url: actionURL,
 29                      loadMsg: '正在加载……',
 30                      singleSelect: true,
 31                      striped: true,
 32                      pagesize: 10,
 33                      pagination: true,
 34                      queryParams: convertArray($('#fmSearch').serializeArray()),
 35                      toolbar: CreateToolBar(),
 36 
 37                      columns: [[
 38                         { title: '编号', field: 'UserID', width: 80, align: 'center' },
 39                         { title: '卡号', field: 'CardID', width: 100, align: 'center' },
 40                         { title: '姓名', field: 'UName', width: 160, align: 'center' },
 41                         { title: '密码', field: 'UPwd', width: 160, align: 'center' },
 42                         { title: '年龄', field: 'UAge', width: 50, align: 'center' },
 43                         { title: '添加时间', field: 'AddDate', width: 150,
 44                             formatter: function (val, rec) {
 45                                 return ChangeDateFormat(val);
 46                             }
 47 
 48                         }
 49                      ]]
 50                  });
 51             },
 52             Add: function () {
 53                 $('#dialogAdd').dialog('open');
 54                 $('#txt_editType').val('add'); //标示为添加
 55             },
 56             Del: function () {
 57                 var r = $('#dataTB').datagrid('getSelected');
 58                 if (r) {
 59                     $.messager.confirm('删除提示', '你确认删除这一条数据吗?', function (d) {
 60                         if (d) {
 61                             $.post(actionURL, { "reqTypes": "del", "uid": r["UserID"] }, function (d) {
 62                                 var res = $.parseJSON(d);
 63                                 if (res.Success) {
 64                                     $.messager.show(
 65                                     {
 66                                         title: '系统提示',
 67                                         msg: '删除成功!',
 68                                         timeout: 1500
 69                                     });
 70                                     $('#dataTB').datagrid('reload', convertArray($('#fmSearch').serializeArray()));
 71                                 } else {
 72                                     $.messager.alert('错误', res.Msg);
 73                                 }
 74                             });
 75                         }
 76                     });
 77                 } else {
 78                     $.messager.alert('提示', '请选择一行数据!');
 79                 }
 80 
 81             },
 82             Update: function () {
 83                 var r = $('#dataTB').datagrid('getSelected');
 84                 if (r == null) { $.messager.alert('提示', '请选择一行数据'); return; };
 85                 $('#dialogAdd').dialog('open');
 86                 $('#fmAdd').form('load', r);
 87                 $('#txt_editType').val('update');
 88             }
 89         };
 90 
 91         function InitForm() {
 92             $('#dialogAdd').dialog(
 93             {
 94                 closed: true,
 95                 title:'添加用户',
 96                 width:300,
 97                 height:300
 98             });
 99          }
100 
101         function CreateToolBar() {
102             var a = [];
103             var isReflesh = true;
104             var isAdd = true;
105             var isDel = true;
106             var isUpdate = true;
107             if (isReflesh) {
108                 a.push({
109                     text: '刷新',
110                     iconCls: 'icon-reload',
111                     handler: function () {
112 
113                         CRUD.Init();
114                     }
115                 });
116 
117                 a.push('-');
118 
119             }
120 
121             if (isAdd) {
122                 a.push({
123                     text: '添加',
124                     iconCls: 'icon-add',
125                     handler: function () {
126                         CRUD.Add();
127                     }
128                 });
129 
130                 a.push('-');
131             }
132 
133             if (isUpdate) {
134                 a.push({
135                     text: '编辑',
136                     iconCls: 'icon-edit',
137                     handler: function () {
138                         CRUD.Update();
139                     }
140                 });
141 
142                 a.push('-');
143             }
144 
145             if (isDel) {
146                 a.push({
147                     text: '删除',
148                     iconCls: 'icon-cut',
149                     handler: function () {
150 
151                         CRUD.Del();
152                     }
153                 });
154 
155                 a.push('-');
156             }
157             return a;
158          }
159     </script>
160     <script type="text/javascript">
161 
162         $(function () {
163 
164             CRUD.Init();
165 
166             InitForm();
167 
168             //查询事件
169             $('#a_search').click(function () {
170                 $('#dataTB').datagrid('reload', convertArray($('#fmSearch').serializeArray()));
171 
172             });
173             //确定添加
174             $('#a_AddOK').click(function () {
175                 if ($('#fmAdd').form('validate')) {
176                     var send = convertArray($("#fmAdd").serializeArray());
177                     $.post(actionURL, send, function (d) {
178                         $('#dataTB').datagrid('reload', convertArray($('#fmSearch').serializeArray()));
179                         var res = $.parseJSON(d);
180                         if (res.Success) {
181                             $.messager.alert('提示', '操作成功');
182                             $('#fmAdd').form('clear');
183                         } else {
184                             $.messager.alert('错误', res.Msg);
185                         }
186                     });
187                 }
188 
189             });
190 
191             //取消
192             $('#a_AddCancle').click(function () {
193                 $('#fmAdd').form('clear');
194                 $('#dialogAdd').dialog('close');
195 
196             })
197 
198         });    
199     </script>
200 
201 </head>
202 <body>
203 <div id="dialogAdd" >
204     <form id="fmAdd" style="text-align:center;">
205         <br /><br />
206          <input type="hidden" name="reqTypes" id="txt_editType" />
207          <input type="hidden" name="UserID" id="txt_editID"/>
208          用户名<input type="text" name="UName" required="true" class="easyui-validatebox" /><br /><br />
209         卡号<input type="text" name="CardID" /><br /><br />
210         年龄<input type="text" name="UAge" /><br /><br />
211         密码<input type="text" name="UPwd" /><br /><br />
212         <a class="easyui-linkbutton" id="a_AddOK">确定</a>
213         <a class="easyui-linkbutton" id="a_AddCancle">取消</a>
214     </form>
215 </div>
216     <div>
217         <form id="fmSearch">
218             <input type="hidden" name="reqTypes" value="search" />
219             用户名<input type="text" name="UName" />
220             年龄<input type="text" name="UAge" />
221             <a class="easyui-linkbutton" id="a_search">查询</a>
222         </form>
223     </div>
224    <table id="dataTB"></table>
225 </body>
226 </html>


最终显示效果如图:

JS帮助函数:

View Code
 1 function ChangeShortDateFormat(cellval) {
 2     if (!cellval) return '';
 3     var date = new Date(parseInt(cellval.replace("/Date(", "").replace(")/", ""), 10));
 4     var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
 5     var currentDate = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
 6     var hour = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
 7     var minu = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
 8     var sec = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
 9 
10     return date.getFullYear() + "-" + month + "-" + currentDate; //+ " " + hour + ":" + minu + ":" + sec;
11 
12 }
13 
14 //表单序列化有转JSON格式
15 function convertArray(o) {
16     var v = {};
17     for (var i in o) {
18         if (o[i].name != '__VIEWSTATE') {
19             if (typeof (v[o[i].name]) == 'undefined')
20                 v[o[i].name] = o[i].value;
21             else
22                 v[o[i].name] += "," + o[i].value;
23         }
24     }
25     return v;
26 }

 

********谢谢支持,感谢批评建议,努力学习中******************************

Demo 的 下载链接

 

posted @ 2013-04-22 10:41  hello*boy  阅读(5126)  评论(31编辑  收藏  举报