说到Model设计,我们先谈谈它的作用:
Model又叫实体类，model层里面的一个类对应数据库里面的一张表， 类里面的每一个属性对应表里面的一个字段，每个属性都有自己的 GET 和 SET 方法， 项目中的数据存取都要依靠GET和SET方法来实现.确切的说它不属于纵向的哪一层，而是所有层都要用到的业务实体层。其实最主要的作用还是用来传递参数.
下面我就用四种方式来创建Model类:
方式一：
创建department的实体类department.cs:
public class department
|
{
|
private int _id;
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private string _departname;
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private string _description;
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public int id
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{
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set { _id = value; }
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get { return _id; }
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}
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public string departname
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{
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set { _departname = value; }
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get { return _departname; }
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}
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public string description
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{
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set { _description = value; }
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get { return _description; }
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}
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}
|
再来创建custom的实体类custom.cs:
public class custom
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{
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private int _id;
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private string _cname;
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private string _ename;
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private int _departID;
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private int _age;
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private string _password;
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private string _departname;
|
public string departname
|
{
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set { _departname = value; }
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get { return _departname; }
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}
|
public int id
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{
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set { _id = value; }
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get { return _id; }
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}
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public string cname
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{
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set { _cname = value; }
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get { return _cname; }
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}
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public string ename
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{
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set { _ename = value; }
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get { return _ename; }
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}
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public int departID
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{
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set { _departID = value; }
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get { return _departID; }
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}
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public int age
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{
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set { _age = value; }
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get { return _age; }
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}
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public string password
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{
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set { _password = value; }
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get { return _password; }
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}
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}
|
实体类我们就建好了,其实也有一种更简化方式,效果和上面是一样的:
方式二：
department.cs
public class department
|
{
|
public int id
|
{
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set ;
|
get;
|
}
|
public string departname
|
{
|
set ;
|
get ;
|
}
|
public string description
|
{
|
set;
|
get ;
|
}
|
}
|
custom.cs:
public class custom
|
{
|
public string departname
|
{
|
set ;
|
get;
|
}
|
public int id
|
{
|
set ;
|
get;
|
}
|
public string cname
|
{
|
set ;
|
get;
|
}
|
public string ename
|
{
|
set;
|
get ;
|
}
|
public int departID
|
{
|
set;
|
get ;
|
}
|
public int age
|
{
|
set;
|
get;
|
}
|
public string password
|
{
|
set ;
|
get;
|
}
|
}
|
也可采用如下这种方式创建:
方式三：
custom.cs:
public class custom
|
{ |
private int _id;
|
private string _cname;
|
private string _ename;
|
private int _departID;
|
private int _age;
|
private string _password;
|
private string _departname;
|
public string departname
|
{
|
get { return _departname; }
|
}
|
public int id
|
{
|
get { return _id; }
|
}
|
public string cname
|
{
|
get { return _cname; }
|
}
|
public string ename
|
{
|
get { return _ename; }
|
}
|
public int departID
|
{
|
get { return _departID; }
|
}
|
public int age
|
{
|
get { return _age; }
|
}
|
public string password
|
{
|
get { return _password; }
|
}
|
public custom(int ID,string DepartName,string CName,string EName,int DepartID,int Age,string PassWord )
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{
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_id = ID;
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_departname = DepartName;
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_cname = CName;
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_ename = EName;
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_departID = DepartID;
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_age = Age;
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_password = PassWord;
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}
|
} |
department.cs:
public class department
|
{ |
private int _id;
|
private string _departname;
|
private string _description;
|
public int id
|
{
|
set { _id = value; }
|
}
|
public string departname
|
{
|
set { _departname = value; }
|
}
|
public string description
|
{
|
set { _description = value; }
|
}
|
public department(int ID,string DepartName,string Description)
|
{
|
_id = ID;
|
_departname = DepartName;
|
_description = Description;
|
}
|
} |
还有一种方式就是结合方式一和方式三来设计
方式四:
custom.cs:
public class custom
|
{ |
private int _id;
|
private string _cname;
|
private string _ename;
|
private int _departID;
|
private int _age;
|
private string _password;
|
private string _departname;
|
public string departname
|
{
|
set { _departname = value; }
|
get { return _departname; }
|
}
|
public int id
|
{
|
set { _id = value; }
|
get { return _id; }
|
}
|
public string cname
|
{
|
set { _cname = value; }
|
get { return _cname; }
|
}
|
public string ename
|
{
|
set { _ename = value; }
|
get { return _ename; }
|
}
|
public int departID
|
{
|
set { _departID = value; }
|
get { return _departID; }
|
}
|
public int age
|
{
|
set { _age = value; }
|
get { return _age; }
|
}
|
public string password
|
{
|
set { _password = value; }
|
get { return _password; }
|
}
|
public custom()
|
{ }
|
public custom(int ID, string DepartName, string CName, string EName, int DepartID, int Age, string PassWord)
|
{
|
_id = ID;
|
_departname = DepartName;
|
_cname = CName;
|
_ename = EName;
|
_departID = DepartID;
|
_age = Age;
|
_password = PassWord;
|
}
|
} |
department.cs:
public class department
|
{ |
private int _id;
|
private string _departname;
|
private string _description;
|
public int id
|
{
|
set { _id = value; }
|
get { return _id; }
|
}
|
public string departname
|
{
|
set { _departname = value; }
|
get { return _departname; }
|
}
|
public string description
|
{
|
set { _description = value; }
|
get { return _description; }
|
}
|
public department()
|
{ }
|
public department(int ID, string DepartName, string Description)
|
{
|
_id = ID;
|
_departname = DepartName;
|
_description = Description;
|
}
|
} |
方式三的赋值和方式一 方式二是不同的。我们采用的是方式一来设计。
其种各种方式的优缺点我就不讲了,代码己说明很清楚了.
Model类建好了,我们就要开始创建DAL类库了,这是三层架构中的核心部分,下回分解,敬请拍砖.
http://www.cnblogs.com/springyangwc/archive/2011/03/24/1994281.html
