程序中呼叫Class(类)
如何在程序中呼叫你写好的Class(类)。为了实现这些功能，下面做了一个小小的例子。第一步，我们得把呼叫的类写好。
首先写一个interface(接口)，这个接口有一个方法Call():
ICallable
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
/// <summary>
/// Summary description for ICallable
/// </summary>
namespace Insus.NET
{
public interface ICallable
{
void Call();
}
}
using System.Collections.Generic;
using System.Linq;
using System.Web;
/// <summary>
/// Summary description for ICallable
/// </summary>
namespace Insus.NET
{
public interface ICallable
{
void Call();
}
}
下面写一个Class(类)，它就是主角，是准备程序可以呼叫的类别。类别实作了上面的接口。
Author
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
/// <summary>
/// Summary description for Author
/// </summary>
namespace Insus.NET
{
public class Author : ICallable
{
string _name;
public Author(string name)
{
this._name = name;
}
public void Call()
{
HttpContext.Current.Response.Write("Hello," + _name);
}
}
}
using System.Collections.Generic;
using System.Linq;
using System.Web;
/// <summary>
/// Summary description for Author
/// </summary>
namespace Insus.NET
{
public class Author : ICallable
{
string _name;
public Author(string name)
{
this._name = name;
}
public void Call()
{
HttpContext.Current.Response.Write("Hello," + _name);
}
}
}
下面分别用三种方式来呼叫类别，第一种，最普通的方法：Author obj = new Author(); 。
MethodA.aspx:
MethodA.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MethodA.aspx.cs" Inherits="MethodA" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
MethodA.aspx.cs:
MethodA.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;
public partial class MethodA : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Author objAuthor = new Author("Insus.NET.");
objAuthor.Call();
}
}
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;
public partial class MethodA : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Author objAuthor = new Author("Insus.NET.");
objAuthor.Call();
}
}
第二种方法：
MethodB.aspx:
MethidB.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MethodB.aspx.cs" Inherits="MethodB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
MethodB.aspx.cs:
MethodB.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;
public partial class MethodB : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Type oType = typeof(Author);
Author objAuthor = (Author)Activator.CreateInstance(oType, new object[] { "Insus.NET." });
objAuthor.Call();
}
}
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Insus.NET;
public partial class MethodB : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Type oType = typeof(Author);
Author objAuthor = (Author)Activator.CreateInstance(oType, new object[] { "Insus.NET." });
objAuthor.Call();
}
}
第三种方法，使用的Reflection(反射)：
MethodC.aspx:
MethodC.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MethodC.aspx.cs" Inherits="MethodC" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
MethodC.aspx.cs:
MethodC.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Reflection;
using Insus.NET;
public partial class MethodC : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string classFullName = "Insus.NET.Author";
Assembly assembly = Assembly.Load("App_Code");
Type objType = assembly.GetType(classFullName);
ICallable obj = (ICallable)Activator.CreateInstance(objType, new object[] { "Insus.NET." });
obj.Call();
}
}
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Reflection;
using Insus.NET;
public partial class MethodC : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string classFullName = "Insus.NET.Author";
Assembly assembly = Assembly.Load("App_Code");
Type objType = assembly.GetType(classFullName);
ICallable obj = (ICallable)Activator.CreateInstance(objType, new object[] { "Insus.NET." });
obj.Call();
}
}
三种方法执行的结果：
