设备管理系统设计和实现
设备管理系统设计和实现
从1月份到3月初，一直在做一个系统，之前做项目都不考虑什么架构，直接把SQL写到cs文件中，后来学会了分层架构，我想以后如果要做类似的网站肯定就这样做了。
1、 架构设计，采用和微软经典的petshop架构类似的分层方式，但是考虑到不需要针对多类数据库，而且也不需要考虑过于复杂的设计，所以就简单进行这样分层
2、 Model说明,model表示数据实体，一个类与数据库中的一张表是相对应的，考虑到代码复用，这里有一个基类baseinfo，其他的类均继承该基类
BaseInfo：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace VideoWorks.ITmanage.Model
{
public class BaseModel
{
public int ID;
//等待插入时需要的表名
virtual public string TableName
{
get { return ""; }
}
//插入时的字段
virtual public string Filed
{
get { return ""; }
}
//等待插入时需要的值
virtual public string Values
{
get { return ""; }
}
//SQL中的where条件
virtual public string Where
{
get { return ""; }
}
//更新数据时sql语句中的匹配对
virtual public string Filedpair
{
get { return ""; }
}
//查询数据时sql语句中的查询结果字段，含有中文
virtual public string Queryfiled
{
get { return ""; }
}
}
}
派生类CharacterInfo:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace VideoWorks.ITmanage.Model
{
public class CharacterInfo : BaseModel
{
//数据成员
private string name;
private string privilege;
private int deleteflag; //对应数据库中字段, 为1表示删除,0表示正常
//默认构造函数
public CharacterInfo()
{
}
//带参构造函数
public CharacterInfo(string name,string privilege,int deleteflag)
{
this.name = name;
this.privilege = privilege;
this.deleteflag = deleteflag;
}
//get set函数
public string Name
{
get { return name; }
set { name = value; }
}
public string Privilege
{
get { return privilege; }
set { privilege = value; }
}
public int Deleteflag
{
get { return deleteflag; }
set { deleteflag = value; }
}
//重载BaseModel中的成员函数
override public string TableName
{
get { return "`character`"; }
}
override public string Values
{
get
{
return Name+"','"+Privilege+"','"+Deleteflag;
}
}
override public string Filed
{
get
{
return "(name,privilege,deleteflag)";
}
}
public override string Filedpair
{
get
{
return "name='" + Name + "',privilege='" + Privilege+"', deleteflag="+Deleteflag;
}
}
public override string Queryfiled
{
get
{
return "ID as 编号, name as 角色类型, privilege as 权限";
}
}
}
}
3、DAL层，DAL层是直接与mysql数据库交互的层次，为BLL层提供接口，调用Model实体，同样每一个类对应数据库中的一张表，这里也有基类BaseDAL
BaseDAL：其中提供的是基本的操作
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using VideoWorks.ITmanage.Model;
namespace VideoWorks.ITmanage.DAL
{
public class BaseDAL
{
//添加数据
public bool Add(BaseModel model)
{
string sql = "insert into " + model.TableName + model.Filed + " values('" + model.Values + "')";
MySqlHelper.ExecuteNonQuery(MySqlHelper.Conn, CommandType.Text, sql, null);
return true;
}
//删除数据，条件为ID
public bool Delete(BaseModel model)
{
string sql="delete from "+model.TableName+" where ID="+model.ID;
MySqlHelper.ExecuteNonQuery(MySqlHelper.Conn, CommandType.Text, sql, null);
return true;
}
//删除数据其实是更新数据表中的deleteflag字段，deleteflag为1表示已经删除
public bool Deleteflag(BaseModel model)
{
string sql = "update " + model.TableName + " set deleteflag=1 where ID=" + model.ID;
MySqlHelper.ExecuteNonQuery(MySqlHelper.Conn, CommandType.Text, sql, null);
return true;
}
//更新数据，条件为ID
public bool Update(BaseModel model)
{
string sql = "update " + model.TableName + " set " + model.Filedpair + " where ID=" + model.ID;
MySqlHelper.ExecuteNonQuery(MySqlHelper.Conn, CommandType.Text, sql, null);
return true;
}
//查询数据，条件为ID
public DataSet Query(BaseModel model)
{
string sql = "select " + model.Queryfiled + " from " + model.TableName + " where ID=" + model.ID;
return MySqlHelper.GetDataSet(MySqlHelper.Conn, CommandType.Text, sql, null);
}
}
}
派生类CharacterDAL，这里可以设置用户自定义的函数，实现更加高级的功能：
using System;
using System.Data;
using System.Configuration;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using VideoWorks.ITmanage.Model;
namespace VideoWorks.ITmanage.DAL
{
public class FilterCharacter
{
public string Keyword{get;set;}
public int Deleteflag { get; set; }
}
/// <summary>
///Character 的摘要说明,BaseDAL基类中已经提供了对数据表的基本操作，并且都是以ID为关键字
/// </summary>
public class CharacterDAL: BaseDAL
{
public CharacterDAL()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
//查询角色信息，拓展的查询条件
public DataSet Query(FilterCharacter filter,BaseModel model)
{
string sql = "select " + model.Queryfiled + " from " + model.TableName+" where ";
if(filter.Keyword !=null)
{
sql += " name like '%" + filter.Keyword + "%' and ";
}
if(filter.Deleteflag!=-1)
{
sql += " deleteflag=" + filter.Deleteflag + " and ";
}
sql += " 1=1";
return MySqlHelper.GetDataSet(MySqlHelper.Conn, CommandType.Text, sql, null);
}
}
}
4、BLL层，实现web界面和DAL层的通信，其中包括各种处理逻辑，是程序中考虑最多的地方，这里是一个类对应一个功能模块，不过考虑到程序也是按照表进行划分的，故也是按照DAL层对应划分了
CharacterBLL，实现角色功能模块的管理：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using VideoWorks.ITmanage.DAL;
using VideoWorks.ITmanage.Model;
namespace VideoWorks.ITmanage.BLL
{
public class CharacterBLL
{
CharacterDAL characterop = new CharacterDAL();
//添加新角色
public bool Add(CharacterInfo character)
{
return characterop.Add(character);
}
//更新角色
public bool Update(CharacterInfo character)
{
return characterop.Update(character);
}
//删除角色，其实是设置标志字段
public bool Delete(CharacterInfo character)
{
return characterop.Deleteflag(character);
}
//查询角色
public DataSet Query(FilterCharacter filter,CharacterInfo character)
{
return characterop.Query(filter, character);
}
//返回角色列表,添加用户时使用
public DataSet Showlist(int flag)
{
CharacterInfo character = new CharacterInfo();
FilterCharacter filter = new FilterCharacter();
filter.Deleteflag = flag;
return characterop.Query(filter, character);
}
//依据ID返回角色类型
public string Getname(int ID)
{
CharacterInfo character = new CharacterInfo();
character.ID = ID;
return characterop.Query(character).Tables[0].Rows[0]["角色类型"].ToString();
}
//依据角色类型返回ID
public int GetID(string name,int flag)
{
CharacterInfo character = new CharacterInfo();
FilterCharacter filter = new FilterCharacter();
filter.Keyword = name;
filter.Deleteflag = flag;
return Convert.ToInt32(characterop.Query(filter,character).Tables[0].Rows[0]["编号"].ToString());
}
//依据下拉框填充字符串
public DataSet Fill(int index)
{
CharacterInfo character = new CharacterInfo();
character.ID = index;
return characterop.Query( character);
}
//判断用户是否具有用户管理权限
public bool isuser(string name)
{
CharacterInfo character = new CharacterInfo();
FilterCharacter filter = new FilterCharacter();
filter.Keyword = name;
filter.Deleteflag = 0;
string right = characterop.Query(filter,character).Tables[0].Rows[0]["权限"].ToString();
if(right[0]=='1')
{
return true;
}
else
{
return false;
}
}
//判断用户是否具有职责管理权限
public bool isresponse(string name)
{
CharacterInfo character = new CharacterInfo();
FilterCharacter filter = new FilterCharacter();
filter.Keyword = name;
filter.Deleteflag = 0;
string right = characterop.Query(filter,character).Tables[0].Rows[0]["权限"].ToString();
if (right[2] == '1')
{
return true;
}
else
{
return false;
}
}
//判断用户是否具有设备管理权限
public bool ismachine(string name)
{
CharacterInfo character = new CharacterInfo();
FilterCharacter filter = new FilterCharacter();
filter.Keyword = name;
filter.Deleteflag = 0;
string right = characterop.Query(filter,character).Tables[0].Rows[0]["权限"].ToString();
if (right[1] == '1')
{
return true;
}
else
{
return false;
}
}
//判断用户是否具有运维管理权限
public bool isoperation(string name)
{
CharacterInfo character = new CharacterInfo();
FilterCharacter filter = new FilterCharacter();
filter.Keyword = name;
filter.Deleteflag = 0;
string right = characterop.Query(filter,character).Tables[0].Rows[0]["权限"].ToString();
if (right[3] == '1')
{
return true;
}
else
{
return false;
}
}
}
}
5、web界面
界面中比较简单，只需要调用BLL和model即可，BLL会调用DAL进行数据操作
opcharacter.cs，这里只列举一下简单的用法：
//添加角色
public bool Add()
{
if (txtname.Text.Trim() == "")
{
lblmessage.Text = "角色名称不能为空";
lblmessage.Visible = true;
return false;
}
else
{
string privilege = "";
privilege += (cbxprivilege.Items[0].Selected == true) ? "1" : "0";
privilege += (cbxprivilege.Items[1].Selected == true) ? "1" : "0";
privilege += (cbxprivilege.Items[2].Selected == true) ? "1" : "0";
privilege += (cbxprivilege.Items[3].Selected == true) ? "1" : "0";
CharacterInfo character = new CharacterInfo(txtname.Text.Trim(), privilege, 0);
CharacterBLL characterop = new CharacterBLL();
if (characterop.Add(character) == true)
{
lblmessage.Text = "角色添加成功";
lblmessage.Visible = true;
return true;
}
else
{
lblmessage.Text = "角色添加失败";
lblmessage.Visible = true;
return false;
}
}
}
//修改角色
public bool Update(int ID)
{
if (txtname.Text.Trim() == "")
{
lblmessage.Text = "角色名称不能为空";
lblmessage.Visible = true;
return false;
}
else
{
string privilege = "";
privilege += (cbxprivilege.Items[0].Selected == true) ? "1" : "0";
privilege += (cbxprivilege.Items[1].Selected == true) ? "1" : "0";
privilege += (cbxprivilege.Items[2].Selected == true) ? "1" : "0";
privilege += (cbxprivilege.Items[3].Selected == true) ? "1" : "0";
CharacterBLL characterop = new CharacterBLL();
CharacterInfo character = new CharacterInfo(txtname.Text.Trim(), privilege, 0);
character.ID = ID;
if (characterop.Update(character) == true)
{
lblmessage.Text = "更新角色成功";
lblmessage.Visible = true;
return true;
}
else
{
lblmessage.Text = "更新角色失败";
lblmessage.Visible = true;
return false;
}
}
}
最后的工程结构如图：
这个项目就这么做完了，学到不少东西，其中好多代码都能够复用，例如BaseInfo,BaseDAL，以后遇到类似的就这样做了。