一步一步asp.net_三层构架的学习
2024-05-13 17:37:19
总结一下现在做的项目,由于混乱的项目经验,我就全部重新写了以前的一个项目,搭建的是简单三层架构的模式,简单三层是我第一个认识的架构层次的理念,也是影响非常深的,以前只是理论的学学什么设计模式,什么mvc,但是这些根本太遥远,因为没有编码经验,没有项目经验,永远也无法体会架构之美,更有甚者,认为这些架构太复杂了,还要花时间,仍然是那种业务数据UI混合的模式,然后混杂大量的增删改查,再加上大量的ctrl+c或者ctrl+v的代码,以至于面向对象的东西,做了大半年除了封装类,没有什么跟面向对象有关系的了.....纯属面向过程+class的模式.那么什么是面向对象,这个问题,太难回答了,面向对象,简单地说就是拿人的思维去解决问题.
人的思维是复杂的,因此,有了复杂的分工,因此我们在学习面向对象的时候更重要的是想象着,
人怎么做?
回归正题:三层构架
三层构架,说到底就是一个简单的分层概念,一个数据访问层,业务逻辑层,和UI层,而我们经常见到的,
BLL就是业务逻辑层,DAL就是数据访问层,czcraft网站就是所谓的UI层,而Model是什么呢?这和MVC的model又有什么区别?
model其实就是实体层,因为为了在BLL和DAL以及Ui层传输数据,我们要借助model这个实体层来传输数据,
比如我们注册一个帐号信息,
我们可以把所有收集到的帐号信息,保存在一个member的实体类中,然后传入给BLL处理.
BLL就是业务逻辑层,我们经常会遇到这样一个现象:
一个asp.net WebForm界面,一个事件大量的代码
这种代码,如果一百个登录是不是要复制一百份,当我们复制的第二次就要考虑怎么复用.
这时候我们想象,为什么要把这些业务写到事件中?
我们首先要做的就是第一步分离,我们可以尝试定义一个类的方式,这是第一步的分离,设计一个member类,里面封装了,member的各种字段和方法,比如登录,等等,
这是第一步的分离,这样的好处就是可以复用方法,不用复制复制再次复制,但是这样子逻辑和数据访问仍然写死在一个类中,如果我们要修改比如一个细节,
1.以前登陆都是明文,现在要加密,结果我们又要修改.
2.如果以前数据库删除一条会员信息,没有做级联删除(比如关联会员的其他信息,比如会员购买记录的信息等),现在要增加,结果又是大量的修改.
为什么我们不分理出数据和操作,以及UI显示?
我们分离出DAL,专门负责数据库操作,不管业务逻辑,BLL只负责业务逻辑,
当然为了考虑多种数据库的兼容设计,我们可以再加一层,IDAL接口层,
当然我们的数据库操作类也最好设计成兼容多种数据库的模式,
关于DAL,BLL,我就举一个实例,比如会员信息,DAL的形式就是这样,
1: using System;
2: using System.Collections.Generic;
3: using System.Linq;
4: using System.Text;
5: using czcraft.Model;
6: using System.Data;
7: using System.Data.SqlClient;
8: using System.Data.Common;
9: namespace czcraft.DAL
10: /*
11: * 作者: Sweet
12: * 创建时间: 2012/5/5 10:13:44
13: * 类说明: czcraft.DAL
14: */
15: {
16: ///<summary>
17: ///member表DAL
18: ///</summary>
19: public partial class memberDAL
20: {
21: DBO.DBOperator SqlHelper = DBO.DBOperator.instance();
22: /// <summary>
23: /// 增加member
24: /// </summary>
25: /// <param name="model">tableName实体</param>
26: /// <returns>执行状态</returns>
27: public int AddNew(member model)
28: {
29: string sql="insert into member(username,password,Sex,nation,mobilephone,Telephone,Email,qq,Zipcode,Address,states,VCode,VTime) output inserted.Id values(@username,@password,@Sex,@nation,@mobilephone,@Telephone,@Email,@qq,@Zipcode,@Address,@states,@VCode,@VTime)";
30: int id=(int)SqlHelper.ExecuteScalar(sql
31: ,(DbParameter)new SqlParameter("username",model.username)
32: ,(DbParameter)new SqlParameter("password",model.password)
33: ,(DbParameter)new SqlParameter("Sex",model.Sex)
34: ,(DbParameter)new SqlParameter("nation",model.nation)
35: ,(DbParameter)new SqlParameter("mobilephone",model.mobilephone)
36: ,(DbParameter)new SqlParameter("Telephone",model.Telephone)
37: ,(DbParameter)new SqlParameter("Email",model.Email)
38: ,(DbParameter)new SqlParameter("qq",model.qq)
39: ,(DbParameter)new SqlParameter("Zipcode",model.Zipcode)
40: ,(DbParameter)new SqlParameter("Address",model.Address)
41: ,(DbParameter)new SqlParameter("states",model.states)
42: ,(DbParameter)new SqlParameter("VCode",model.VCode)
43: ,(DbParameter)new SqlParameter("VTime",model.VTime)
44: );
45: return id;
46: }
47: /// <summary>
48: /// 更新member实体
49: /// </summary>
50: /// <param name="model">tableName实体</param>
51: /// <returns>执行状态</returns>
52: public bool Update(member model)
53: {
54: string sql="update member set username=@username,password=@password,Sex=@Sex,nation=@nation,mobilephone=@mobilephone,Telephone=@Telephone,Email=@Email,qq=@qq,Zipcode=@Zipcode,Address=@Address,states=@states where id=@id";
55: return SqlHelper.ExecuteNonQuery(sql
56: ,(DbParameter)new SqlParameter("Id",model.Id)
57: ,(DbParameter)new SqlParameter("username",model.username)
58: ,(DbParameter)new SqlParameter("password",model.password)
59: ,(DbParameter)new SqlParameter("Sex",model.Sex)
60: ,(DbParameter)new SqlParameter("nation",model.nation)
61: ,(DbParameter)new SqlParameter("mobilephone",model.mobilephone)
62: ,(DbParameter)new SqlParameter("Telephone",model.Telephone)
63: ,(DbParameter)new SqlParameter("Email",model.Email)
64: ,(DbParameter)new SqlParameter("qq",model.qq)
65: ,(DbParameter)new SqlParameter("Zipcode",model.Zipcode)
66: ,(DbParameter)new SqlParameter("Address",model.Address)
67: ,(DbParameter)new SqlParameter("states",model.states)
68: //,(DbParameter)new SqlParameter("VCode",model.VCode)
69: //,(DbParameter)new SqlParameter("VTime",model.VTime)
70: );
71: }
72: /// <summary>
73: /// 删除member
74: /// </summary>
75: /// <param name="id">id</param>
76: /// <returns>执行状态</returns>
77: public bool Delete(int id)
78: {
79: return SqlHelper.ExecuteNonQuery("delete from member where id=@id",
80: (DbParameter)new SqlParameter("id",id));
81: }
82: /// <summary>
83: /// 删除member
84: /// </summary>
85: /// <param name="strID">strID,记得多个用,隔开</param>
86: /// <returns>执行状态</returns>
87: public bool DeleteMoreID(string strID)
88: {
89: return SqlHelper.ExecuteNonQuery("delete from member where id in ("+strID+")");
90: }
91: /// <summary>
92: /// 将DataRow转化为Model实体
93: /// </summary>
94: /// <param name="row">DataRow信息</param>
95: /// <returns>执行状态</returns>
96: private static member ToModel(DataRow row)
97: {
98: member model=new member();
99: model.Id =row.IsNull("Id")?null:(System.Int32?)row["Id"];
100: model.username =row.IsNull("username")?null:(System.String)row["username"];
101: model.password =row.IsNull("password")?null:(System.String)row["password"];
102: model.Sex =row.IsNull("Sex")?null:(System.String)row["Sex"];
103: model.nation =row.IsNull("nation")?null:(System.String)row["nation"];
104: model.mobilephone =row.IsNull("mobilephone")?null:(System.String)row["mobilephone"];
105: model.Telephone =row.IsNull("Telephone")?null:(System.String)row["Telephone"];
106: model.Email =row.IsNull("Email")?null:(System.String)row["Email"];
107: model.qq =row.IsNull("qq")?null:(System.String)row["qq"];
108: model.Zipcode =row.IsNull("Zipcode")?null:(System.String)row["Zipcode"];
109: model.Address =row.IsNull("Address")?null:(System.String)row["Address"];
110: model.states =row.IsNull("states")?null:(System.String)row["states"];
111: model.VCode =row.IsNull("VCode")?null:(System.String)row["VCode"];
112: model.VTime =row.IsNull("VTime")?null:(System.DateTime?)row["VTime"];
113: return model;
114: }
115: /// <summary>
116: /// 根据id获取tableName实体信息
117: /// </summary>
118: /// <param name="id">id</param>
119: /// <returns>执行状态</returns>
120: public member Get(int id)
121: {
122: DataTable dt=SqlHelper.ExecuteDataTable("select * from member where id=@id",
123: (DbParameter)new SqlParameter("id",id));
124: if(dt.Rows.Count>1){
125: throw new Exception("more than 1 row was found");
126: }
127: if(dt.Rows.Count<=0){return null;}
128: DataRow row=dt.Rows[0];
129: member model=ToModel(row);
130: return model;
131: }
132: /// <summary>
133: /// 列出tableName所有的实体信息
134: /// </summary>
135: /// <returns>执行状态</returns>
136: public IEnumerable<member> ListAll()
137: {
138: List<member> list=new List<member>();
139: DataTable dt=SqlHelper.ExecuteDataTable("select * from member");
140: foreach(DataRow row in dt.Rows){
141: list.Add(ToModel(row));
142: }
143: return list;
144: }
145:
146: /// <summary>
147: ///分页获取数据
148: /// </summary>
149: /// <param name="tableName">表名</param>
150: /// <param name="InnerJoin">内连接</param>
151: /// <param name="strGetFields">返回的列信息</param>
152: /// <param name="sortId">排序的列名</param>
153: /// <param name="PageSize">每页记录数</param>
154: /// <param name="PageIndex">页数</param>
155: /// <param name="OrderType">排序类型排序类型, 非0 值则降序</param>
156: /// <param name="strWhere">查询条件(注意: 不要加where) </param>
157: public IEnumerable<member> ListByPagination(string tableName,string InnerJoin,string strGetFields,string sortId,int PageSize,int PageIndex,string OrderType,string strWhere)
158: {
159: List<member> list=new List<member>();
160: DataTable dt=SqlHelper.ExecuteDataTable("exec[pagination] @tableName,@InnerJoin,@strGetFields,@sortId,@PageSize,@PageIndex,@doCount,@OrderType,@strWhere",(DbParameter)new SqlParameter("tableName",tableName),(DbParameter)new SqlParameter("@InnerJoin",InnerJoin),(DbParameter)new SqlParameter("@strGetFields",strGetFields),(DbParameter)new SqlParameter("@sortId",sortId),(DbParameter)new SqlParameter("@PageSize",PageSize),(DbParameter)new SqlParameter("@PageIndex",PageIndex),(DbParameter)new SqlParameter("@doCount","0"),(DbParameter)new SqlParameter("@OrderType",OrderType),(DbParameter)new SqlParameter("@strWhere",strWhere));
161: foreach(DataRow row in dt.Rows){
162: list.Add(ToModel(row));
163: }
164: return list;
165: }
166: /// <summary>
167: ///获取表总记录个数(不用加where)
168: /// <param name="strWhere">查询条件(不用加where)</param>
169: /// <summary>
170: public int GetCount(string strWhere)
171: {
172: if(!string.IsNullOrEmpty(strWhere))
173: strWhere=" where "+strWhere;
174: return SqlHelper.ExecuteSelectFirstNum("select count(1) from member"+strWhere);
175: }
176: }
177: }
这里是用代码生成器生成的,我自己写的一个简单的代码生成器,为了学习代码生成器,专门设计了一个简单的,
这里注意,因为代码生成器的原因,我们必须把自己写的方法等,通过部分类的方式合并,所以,我们都要加上partial 关键字,这很重要
可以看到DAL主要涉及的都是纯种的增删改查操作,他不用管具体有没有权限之类的,这些不是
他的活,为什么要他干?
接下来就是BLL层,业务逻辑层,我们经常碰到,前期不需要功能,后期增加进去,以前没有权限判断,以前没有加密要求,以前的加密太简单,现在要更改一种更好的方法,结果要修改好多东西,这样就全部写在业务逻辑层,他只负责业务逻辑的判断,然后提供给UI数据,
1: /// <summary>
2: /// 判定查询条件
3: /// </summary>
4: /// <param name="info"></param>
5: /// <returns></returns>
6: public static string ConfirmCondition(string info)
7: {
8: string condition = "";//查询条件
9: if (Tools.IsNumber(info)) //如果是数字,则查询id
10: {
11: condition = "id like '%" + info + "%'";
12: }
13: else condition = "username like '%" + info + "%'"; //查询用户名
14: return condition;
15: }
16: /// <summary>
17: /// 检查用户名和邮箱
18: /// </summary>
19: /// <param name="UserName">用户名</param>
20: /// <param name="Email">邮箱</param>
21: /// <returns></returns>
22: public bool CheckUserNameAndEmail(string UserName,string Email)
23: {
24: memberDAL dal=new memberDAL ();
25: member info = dal.GetMemberInfo(UserName);
26: return Email==info.Email;
27: }
28: /// <summary>
29: /// 随机生成一个6位的密码
30: /// </summary>
31: /// <returns></returns>
32: public string CreateNewPwd()
33: {
34: string Pwd="";
35: Random ran=new Random (DateTime.Now.Second);
36: for (int i = 0; i < 6; i++)
37: {
38: Pwd += ran.Next(1, 10);
39: }
40: return Pwd;
41: }
42: /// <summary>
43: /// 修改密码
44: /// </summary>
45: /// <param name="UserName">用户名</param>
46: /// <param name="Pwd">密码</param>
47: /// <returns></returns>
48: public bool UpdatePwd(string UserName, string Pwd)
49: {
50: return new memberDAL().UpdatePassword(UserName, Tools.GetMD5(Pwd));
51: }
52: /// <summary>
53: /// 修改密码
54: /// </summary>
55: /// <param name="UserName">用户名</param>
56: /// <param name="oldPwd">旧密码</param>
57: /// <param name="newPwd">新密码</param>
58: /// <returns></returns>
59: public bool UpdatePassword(string UserName, string oldPwd, string newPwd)
60: {
61: memberDAL dal = new memberDAL();
62: string Pwd = dal.GetPassword(UserName);
63: if (Pwd == Tools.GetMD5(oldPwd))
64: {
65: //加密并且更新
66: return dal.UpdatePassword(UserName, Tools.GetMD5(newPwd));
67: }
68: return false;
69: }
70: /// <summary>
71: /// 更新member实体
72: /// </summary>
73: /// <param name="model">member实体</param>
74: /// <param name="IsUserNameUpdate">是否采用用户名更新</param>
75: /// <returns></returns>
76: public bool UpdateUserInfo(member model)
77: {
78: return new memberDAL().Update(model, true);
79: }
80: /// <summary>
81: /// 检验用户名是否存在
82: /// </summary>
83: /// <param name="userName"></param>
84: /// <returns></returns>
85: public bool CheckExistUserName(string userName)
86: {
87: return new memberDAL().GetCount(string.Format(" username='{0}'", userName)) == 0;
88: }
89: /// <summary>
90: /// 验证用户信息
91: /// </summary>
92: /// <param name="UserName">用户名</param>
93: /// <param name="GuidInfo">guid随机码</param>
94: public bool ActivationMemberNumber(string UserName, string GuidInfo)
95: {
96: memberDAL dal = new memberDAL();
97: //获取过期时间
98: DateTime dt = dal.GetMemberVTime(UserName, GuidInfo);
99: //如果已经过期
100: if (dt < DateTime.Now)
101: {
102: return false;
103: }
104: else
105: {
106: //激活帐号
107: return dal.ActivationMemberStatus(UserName);
108: }
109: }
110: /// <summary>
111: /// 用户登录
112: /// </summary>
113: /// <param name="info">会员model</param>
114: /// <returns></returns>
115: public bool MemberLogin(member info)
116: {
117: info.password = Tools.GetMD5(info.password);
118: return new memberDAL().MemberLogin(info);
119: }
120: /// <summary>
121: /// 检验密码是否正确
122: /// </summary>
123: /// <param name="UserName">用户名</param>
124: /// <param name="Password">密码</param>
125: /// <returns></returns>
126: public bool CheckPwd(string UserName, string Password)
127: {
128: //先不加密,以后全部都要加密
129: string Pwd = Tools.GetMD5(new memberDAL().GetPassword(UserName));
130: if (Password == Pwd)
131: {
132: return true;
133: }
134: else
135: return false;
136: }
137: /// <summary>
138: /// 返回验证组件的数组格式(Validate)
139: /// </summary>
140: /// <param name="fieldId">字段</param>
141: /// <param name="Status">状态</param>
142: /// <param name="errorMsg">错误消息(没有则"")</param>
143: /// <returns></returns>
144: public string ReturnValueValidateAjax(string fieldId, bool Status, string errorMsg)
145: {
146:
147: if (string.IsNullOrEmpty(errorMsg))
148: {
149: return "[\"" + fieldId + "\",\"" + Status + "\"]";
150: }
151: return "[\"" + fieldId + "\",\"" + Status + "\",\""+errorMsg+"\"]";
152:
153: }
154:
155: /// <summary>
156: /// 返回给客户端的json格式数据(用于根据用户登录状态决定)
157: /// </summary>
158: /// <param name="info"></param>
159: /// <returns></returns>
160: public string ReturnJson(member info, out bool Status)
161: {
162: //登录状态
163: Status = MemberLogin(info);
164: //生成json格式数据
165: return WriteJsonForReturn(Status, info.username);
166:
167: }
168: /// <summary>
169: /// 记住帐号和密码的枚举
170: /// </summary>
171: public enum RememberType
172: {
173: /// <summary>
174: /// 记住帐号
175: /// </summary>
176: RememberName = 0,
177: /// <summary>
178: /// 同时记住帐号和密码
179: /// </summary>
180: RememberNameAndPwd = 1,
181: /// <summary>
182: /// 不记住帐号密码
183: /// </summary>
184: NoRemember = 2
185: }
186:
187: /// <summary>
188: /// 根据保存帐号密码状态判断是保存帐号还是同时保存帐号和密码
189: /// </summary>
190: /// <param name="IsSaveName">"1"代表保存,"0"代表不保存</param>
191: /// <param name="IsSavePwd">"1"代表保存,"0"代表不保存</param>
192: /// <returns></returns>
193: public RememberType GetRememberType(string IsSaveName, string IsSavePwd)
194: {
195: RememberType SaveType = RememberType.NoRemember;
196:
197: //保存帐号和密码
198: if (IsSaveName.Equals("1") && IsSavePwd.Equals("1"))
199: {
200: SaveType = RememberType.RememberNameAndPwd;
201: }
202: //保存帐号
203: if (IsSaveName.Equals("1") && !IsSavePwd.Equals("1"))
204: {
205: SaveType = RememberType.RememberName;
206: }
207: else if (!IsSaveName.Equals("1"))
208: {
209: SaveType = RememberType.NoRemember;
210: }
211: return SaveType;
212: }
213: /// <summary>
214: /// 根据用户名获取用户信息(返回json数据)
215: /// </summary>
216: /// <param name="UserName">用户名</param>
217: /// <returns></returns>
218: public string GetMemberInfoByJson(string UserName)
219: {
220: bool Status = false;
221: member info = new memberDAL().GetMemberInfo(UserName);
222: if (info.Id.HasValue)
223: {
224: Status = true;
225: }
226: StringBuilder json = new StringBuilder();
227: StringWriter sw = new StringWriter(json);
228: using (JsonWriter jsonWriter = new JsonTextWriter(sw))
229: {
230: jsonWriter.Formatting = Formatting.Indented;
231: jsonWriter.WriteStartObject();
232: jsonWriter.WritePropertyName("Status");
233: jsonWriter.WriteValue(Status);
234: jsonWriter.WritePropertyName("Data");
235: jsonWriter.WriteStartArray();
236: jsonWriter.WriteStartObject();
237: jsonWriter.WritePropertyName("UserName");
238: jsonWriter.WriteValue(info.username);
239: jsonWriter.WritePropertyName("Sex");
240: jsonWriter.WriteValue(info.Sex);
241: jsonWriter.WritePropertyName("Nation");
242: jsonWriter.WriteValue(info.nation);
243: //mobilephone Telephone Email qq Zipcode Address
244: jsonWriter.WritePropertyName("MobilePhone");
245: jsonWriter.WriteValue(info.mobilephone);
246: jsonWriter.WritePropertyName("TelePhone");
247: jsonWriter.WriteValue(info.Telephone);
248: jsonWriter.WritePropertyName("Email");
249: jsonWriter.WriteValue(info.Email);
250: jsonWriter.WritePropertyName("QQ");
251: jsonWriter.WriteValue(info.qq);
252: jsonWriter.WritePropertyName("ZipCode");
253: jsonWriter.WriteValue(info.Zipcode);
254: //地址处理
255:
256: string[] strAddresss = GetSplitAddress(info.Address);
257: string Province = "";
258: string City = "";
259: string Country = "";
260: string Address = "";
261: if (strAddresss.Count() > 0)
262: {
263: Province = strAddresss[0];
264: City = strAddresss[1];
265: Country = strAddresss[2];
266: Address = strAddresss[3];
267:
268: }
269: jsonWriter.WritePropertyName("Province");
270: jsonWriter.WriteValue(Province);
271: jsonWriter.WritePropertyName("City");
272: jsonWriter.WriteValue(City);
273: jsonWriter.WritePropertyName("Country");
274: jsonWriter.WriteValue(Country);
275: jsonWriter.WritePropertyName("Address");
276: jsonWriter.WriteValue(Address);
277: jsonWriter.WriteEndObject();
278:
279: jsonWriter.WriteEndArray();
280: jsonWriter.WriteEndObject();
281: }
282: return json.ToString();
283: }
284: /// <summary>
285: /// 地址分割(将用户信息表中的地址分割成 省(编号) 市(编号) 县(编号) 家住址
286: /// </summary>
287: /// <param name="Address">地址</param>
288: /// <returns></returns>
289: public string[] GetSplitAddress(string Address)
290: {
291: string[] str = Address.Split('|');
292: return str;
293: }
294: /// <summary>
295: /// 检查用户登录状态,用于验证自动登录(并返回json格式)
296: /// </summary>
297: /// <returns></returns>
298: public string CheckLoginStatus(out bool Status)
299: {
300:
301: //登录状态
302: Status = true;
303: string UserName = Common.CookieHelper.GetCookieValue("UserName");
304: //如果cookies为空,直接返回
305: if (Tools.IsNullOrEmpty(UserName))
306: {
307: Status = false;
308: }
309: string Pwd = Common.CookieHelper.GetCookieValue("Pwd");
310: if (Tools.IsNullOrEmpty(Pwd))
311: {
312: Status = false;
313: }
314: else
315: {
316: //查找该用户真实密码,并进行md5加密
317: string password = new memberDAL().GetPassword(UserName);
318: //如果两次密码相同则可以自动登陆了
319: if (password!=Pwd)
320: {
321: Status = false;
322: }
323: }
324:
325: //生成json格式数据
326: return WriteJsonForReturn(Status, UserName);
327: }
328: /// <summary>
329: /// 为用户登录写入json数据
330: /// </summary>
331: /// <param name="Status">登录状态</param>
332: /// <param name="UserName">用户名</param>
333: /// <returns></returns>
334: public string WriteJsonForReturn(bool Status, string UserName)
335: {
336: StringBuilder json = new StringBuilder();
337: StringWriter sw = new StringWriter(json);
338: using (JsonWriter jsonWriter = new JsonTextWriter(sw))
339: {
340: jsonWriter.Formatting = Formatting.Indented;
341: jsonWriter.WriteStartObject();
342: jsonWriter.WritePropertyName("Status");
343: jsonWriter.WriteValue(Status);
344: jsonWriter.WritePropertyName("UserName");
345: jsonWriter.WriteValue(UserName);
346: jsonWriter.WriteEndObject();
347: }
348: return json.ToString();
349: }
350: /// <summary>
351: /// 记住用户信息
352: /// </summary>
353: /// <param name="Type">记住用户信息类别</param>
354: /// <returns></returns>
355: public bool RememberUserInfo(member info, RememberType type)
356: {
357: if (type == RememberType.RememberName)
358: {
359: //记住帐号7天
360: CookieHelper.SetCookie("UserName", info.username, DateTime.Now.AddDays(7));
361: }
362: else if (type == RememberType.RememberNameAndPwd)
363: {
364:
365: //md5哈希加密
366: string sercret = Tools.GetMD5(info.password);
367: //同时记住帐号和密码7天
368: CookieHelper.SetCookie("UserName", info.username, DateTime.Now.AddDays(7));
369: CookieHelper.SetCookie("Pwd", sercret, DateTime.Now.AddDays(7));
370: }
371: else
372: {
373: return false;
374: }
375: return true;
376:
377: }
378:
379:
380: }
381: }
可以看到,这里没有任何数据库的操作,他只负责业务逻辑判断,然后给UI提供数据.
而web的UI层,我们以前经常性碰到这样的代码,
1: /// <summary>
2: /// 网页中间显示的涵数condiction显示条件，nums显示行数
3: /// </summary>
4: /// <param name="condiction"></param>
5: /// <param name="nums"></param>
6: public void Show(string condiction, int nums)
7: {
8:
9: string sql = "";
10: //还要修改
11: string id = "";
12: string picturepath = "";
13: string name = "";
14: string appreciation = "";
15: string reward = "";
16: string title = "";
17: string time = "";
18: string ArticleHtmlUrl = "";
19: StringBuilder content = new StringBuilder();//高效率拼接字符串
20: if (condiction == "大师风采")
21: {
22: sql = "select top " + nums + " hit,id,name,appreciation,Reward,Picturepath from master where state='1' and state1='1' order by master.rank desc";
23: DataTable dt = cs.GetDataSet(sql).Tables[0];
24:
25:
26: for (int i = 0; i < dt.Rows.Count; i++)
27: {
28: id = dt.Rows[i]["id"].ToString();
29: picturepath = dt.Rows[i]["Picturepath"].ToString();
30: picturepath = GetPicturePath(picturepath);
31: name = dt.Rows[i]["name"].ToString();
32:
33: //appreciation = GetTile(dt.Rows[i]["appreciation"].ToString().Replace("<br>","\r\n"));
34: //reward = GetTile(dt.Rows[i]["Reward"].ToString().Replace("<br>", "\r\n"));
35: if (i == 0) {
36: content.Append("<div class='r_s_p m_border'>");
37: }
38: else
39: {
40: content.Append("<div class='r_s_p'>");
41: }
42: content.Append("<div class='gk_pic'><img src='" + picturepath + "' alt='" + dt.Rows[i]["name"].ToString() + "'/></div>");
43:
44: content.Append("<div class='master_p'>");
45:
46: content.Append("<p><strong><a href='Masterintro.aspx?id=" + id + "'>" + name + "</a></strong></p>");
47:
48: content.Append("<div class='honor'><ul>");
49:
50: content.Append("<li><a href='Masterintro.aspx?id=" + id + "'>" + appreciation + "</a></li>");
51:
52: content.Append("<li><a href='Masterintro.aspx?id=" + id + "'>" + reward + "</a></li>");
53: content.Append("</ul></div></div></div>");
54:
55: content.Append("<div class='master_border'> </div>");
56:
57: }
58:
59: Response.Write(content.ToString());
60: return;
61:
62: }
63:
64:
65:
66:
67: if (condiction == "业内新闻")
68: {
69: sql = "select top " + nums + " id,title,time,ArticleHtmlUrl from news order by time desc";
70: DataTable dt = cs.GetDataSet(sql).Tables[0];
71: //if (dt.Rows.Count == 0)
72: //{
73: // content.Append("<li><a href='#'>#</a><span class='time'>[##-##-##]</span></li>");
74: //}
75: for (int i = 0; i < dt.Rows.Count; i++)
76: {
77:
78: title = GetTile(dt.Rows[i]["title"].ToString());
79:
80: id = dt.Rows[i]["id"].ToString();
81:
82: time = ((DateTime)dt.Rows[i]["time"]).Date.ToShortDateString();
83:
84: ArticleHtmlUrl = dt.Rows[i]["ArticleHtmlUrl"].ToString();
85:
86: content.Append("<li><a href='NewsContent.aspx?id="+id+"'>" + title + "</a><span class='time'>[" + time + "]</span></li>");
87:
88: }
89: Response.Write(content.ToString());
90:
91: return;
92:
93: }
94: if (condiction == "工艺知识")
95: {
96:
97: sql = "select top " + nums + " id,title,time,ArticleHtmlUrl from craftknowledge order by time desc";
98:
99: DataTable dt = cs.GetDataSet(sql).Tables[0];
100:
101: //if (dt.Rows.Count == 0)
102: //{
103: // content.Append("<li><a href='#'>#</a><span class='time'>[##-##-##]</span></li>");
104: //}
105: for (int i = 0; i < dt.Rows.Count; i++)
106: {
107:
108: title = GetTile(dt.Rows[i]["title"].ToString());
109:
110: id = dt.Rows[i]["id"].ToString();
111:
112: time = ((DateTime)dt.Rows[i]["time"]).Date.ToShortDateString();
113:
114: ArticleHtmlUrl = dt.Rows[i]["ArticleHtmlUrl"].ToString();
115:
116: //Response.Write("<li><a href='craftknowledge_info.aspx?craft_id=" + id + "'>" + title + "</a><span class='time'>[" + time + "]</span></li>");
117:
118: content.Append("<li><a href='craftknowledge_info.aspx?id=" + id + "'>" + title + "</a><span class='time'>[" + time + "]</span></li>");
119:
120: }
121: Response.Write(content.ToString());
122: return;
123:
124: }
125:
126: if (condiction == "企业展示")
127: {
128: sql = "select top " + nums + " hit, id,name from company where state='1' and state1='1' order by company.rank desc";
129:
130: DataTable dt = cs.GetDataSet(sql).Tables[0];
131: //if (dt.Rows.Count == 0)
132: //{
133: // content.Append("<li><a href='#'>#</a></li>");
134: //}
135: for (int i = 0; i < dt.Rows.Count; i++)
136: {
137: id = dt.Rows[i]["id"].ToString();
138:
139: name = GetTile(dt.Rows[i]["name"].ToString());
140:
141:
142:
143: content.Append("<li><a href='company_introduce.aspx?id=" + id + "'>" + name + "</a></li>");
144:
145: }
146: Response.Write(content.ToString());
147: return;
148:
149: }
150: }
这种UI和数据混合的方式,如果界面一修改,改动大了,经常性碰到,这个界面太囧了......然后改整个版面,为什么我们不把数据和UI隔离开来,后台么?
只负责数据提供,通过JSON等传输,然后前台js/JQuery操作界面呢?
这样前台就应该这样,
1: <%@ Page Language="C#" MasterPageFile="~/InfoPage.master" AutoEventWireup="true"
2: CodeFile="MasterInfo.aspx.cs" Inherits="Master_MasterInfo" Title="大师信息" %>
3:
4: <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
5: <link href="../css/gs_ms.css" rel="stylesheet" type="text/css" />
6:
7: <script src="../Admin/scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
8:
9: <script src="../js/queryUrlParams.js" type="text/javascript"></script>
10:
11: <script src="MasterInfo.js" type="text/javascript"></script>
12:
13:
14: <script type="text/javascript">
15: //获得大师id信息
16: var id=$.query.get("MasterId");
17: </script>
18:
19: </asp:Content>
20: <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
21: <div class="ms">
22: <div class="ms_top">
23: <div class="m_load">
24: <span><a href="../Default.aspx">首页</a> > <a href="MasterList.aspx">大师风采</a> > 大师</span></div>
25: <div class="mst_c">
26: <ul class="mst_ul">
27: <li><a href="#" id="Master_Intro">
28: <p class="hide">
29: 大师简介</p>
30: </a></li>
31: <li><a href="#" id="Master_Award">
32: <p class="hide">
33: 获奖情况</p>
34: </a></li>
35: <li><a href="#" id="Master_Work">
36: <p class="hide">
37: 大师作品</p>
38: </a></li>
39: </ul>
40: <div class="mst_img">
41: <img src="../images/master_img.png" id="imgMaster" /></div>
42: <div class="mst_xx">
43: <table width="252" height="141" id="tbMasterInfo">
44: </table>
45: </div>
46: </div>
47: </div>
48: <div class="gs_nr" id="MasterContent">
49:
50: </div>
51: </div>
52: </asp:Content>
然后通过jquery操作,
1:
2: $(function(){
3: GetMasterInfo();
4: GetMasterIntro();
5: //绑定获取大师简介事件
6: $("#Master_Intro").click(function(){
7: GetMasterIntro();
8: });
9: $("#Master_Award").click(function(){
10: GetMasterReward();
11: });
12: $("#Master_Work").click(function(){
13: GetMasterWork();
14: });
15: });
16: //获取大师基本信息
17: function GetMasterInfo(){
18: $.ajax({
19: url:"Data/MasterInfo.ashx?method=GetMasterInfo&MasterId="+id,
20: type:"post",
21: success:function(text){
22: var jsonData=$.parseJSON(text);
23: if(jsonData.Status){
24: var item='<tr><td width="51"> 姓名：</td>';
25: item+=' <td width="92">'+jsonData.Data[0].Name+'</td>';
26: item+='<td width="47">性别: </td>';
27: item+='<td width="42">'+jsonData.Data[0].Sex+'</td>';
28: item+=' </tr>';
29: item+='<tr> <td> 出生：</td>';
30: item+='<td>'+jsonData.Data[0].Birthday+'</td>';
31: item+='</tr>';
32: item+=' <tr><td colspan="4">艺术家分类：';
33: item+=jsonData.Data[0].TypeName;
34: item+='</td></tr>';
35:
36: $("#tbMasterInfo").empty();
37: $("#tbMasterInfo").append(item);
38: var src="../Admin/FileManage/GetImg.ashx?method=GetMasterPic&type=medium&fileName="+jsonData.Data[0].PicturePath;
39: $("#imgMaster").attr("src",src);
40: }
41: }
42: });
43:
44: }
45: //获取大师简介信息
46: function GetMasterIntro(){
47: $.ajax({
48: url:"Data/MasterInfo.ashx?method=GetMasterIntro&MasterId="+id,
49: type:"post",
50: success:function(text){
51: var jsonData=$.parseJSON(text);
52: if(jsonData.Status){
53: var item='<h4>大师简介</h4>';
54: item+='<p>'+jsonData.Data[0].Introduction+'</p>';
55: $("#MasterContent").empty();
56: $("#MasterContent").append(item);
57: }
58: }
59: });
60: }
61: //获取大师荣誉信息
62: function GetMasterReward(){
63: $.ajax({
64: url:"Data/MasterInfo.ashx?method=GetMasterReward&MasterId="+id,
65: type:"post",
66: success:function(text){
67: var jsonData=$.parseJSON(text);
68: var item='<h4>大师荣誉</h4>';
69: if(jsonData.Status){
70: item+='<ul class="gs_reward">';
71: item+=' <li>'+jsonData.Data[0].Reward+'</li></ul>';
72: item+=' <h4>获奖情况</h4><ul class="gs_cup">';
73: $.each(jsonData.Data[0].CertPicList,function(key,value){
74: var img="../Admin/FileManage/GetImg.ashx?method=GetMasterCert&type=medium&fileName="+value.CertPic;
75: item+='<li><span class="c_pic_a">';
76: item+='<img src='+img+' alt='+value.CertName+' title='+value.CertName+'/></span><span class="a_title">'+value.CertName+'</span>';
77: item+='</li>';
78: });
79: item+='</ul>';
80:
81: }
82: else{
83: item+=' <h4>获奖情况</h4>';
84: }
85: $("#MasterContent").empty();
86: $("#MasterContent").append(item);
87: }
88: });
89: }
90: //获取大师产品信息
91: function GetMasterWork(){
92: $.ajax({
93: url:"Data/MasterInfo.ashx?method=GetMasterWork&MasterId="+id,
94: type:"post",
95: success:function(text){
96: var jsonData=$.parseJSON(text);
97: var item='';
98: if(jsonData.Status){
99: $.each(jsonData.Data,function(key,value){
100: item+='<h4>'+value.TypeName+'</h4>';
101: item+='<ul class="gs_pic">';
102: $.each(value.Product,function(PKey,PValue){
103: var img="../Admin/FileManage/GetImg.ashx?method=GetMainProductPic&type=medium&fileName="+PValue.Picturepath;
104: item+='<li>';
105: item+='<a href="../Product/Product.aspx?ProductId='+PValue.ProductId+'" class="c_pic_a"><img src="'+img+'" alt="'+PValue.Name+'" title="'+PValue.SimpleName+'"/></a>';
106: item+='<a href="../Product/Product.aspx?ProductId='+PValue.ProductId+'" class="a_title">'+PValue.SimpleName+'<br/><span class="rad2">￥'+PValue.Lsprice+'</span></a> ';
107: item+='</li>';
108: })
109: item+='</ul>';
110: item+='<div style="text-align:right"><a href="../Product/Master_MoreProduct.aspx?MasterId=' + id + '&&TypeId=' + value.TypeId + '">more>></a></div>';
111:
112: })
113:
114: }
115: else{
116: item+='没有数据!';
117: }
118: $("#MasterContent").empty();
119: $("#MasterContent").append(item);
120: }
121: });
122: }
123:
这样不管怎么改界面,我们的数据是不变的,哈哈!
还有最最最重要的,我们的代码规范,命名规范,我的所有代码全部自己强制性要求自己必须遵
守,所以才能一目了然,清晰,严谨,易于维护和开发!
今天的三层就总结到这里!
还有项目中比较重要的一些东西,下次在总结!
转载于:https://www.cnblogs.com/mysweet/archive/2012/05/07/2486771.html
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