1.生成DLL
打开VS2008 - >新建->项目->类库->ClassLibrary1,在ClassLibrary1中会自动创建一个Class1类
class1中加入代码如下：
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 namespace ClassLibrary1 6 { 7 public class Class1 8 { 9 private int a = 0;10 private int b = 0;11 public int SetA12 {13 get { return a; }14 set { a = value; }15 }16 17 public int SetB18 {19 get { return b; }20 set { b = value; }21 }22 public int getResult()23 {24 return a - b;25 }26 }27 } 创建两个子类：
1 //子类ClassAdd 2 using System; 3 using System.Collections.Generic; 4 using System.Linq; 5 using System.Text; 6 namespace ClassLibrary1 7 { 8 public class ClassAdd : Class1 9 {10 public int getResult()11 {12 return SetA + SetB;13 }14 }15 } 1 //子类ClassMult 2 using System; 3 using System.Collections.Generic; 4 using System.Linq; 5 using System.Text; 6 namespace ClassLibrary1 7 { 8 public class ClassMult : Class1 9 {10 public int getResult()11 {12 return SetA * SetB;13 }14 }15 } 生成解决方案，在ClassLibrary1\ClassLibrary1\bin\Debug就可获得DLL文件
2.调用DLL
VS2008 - >新建->网站 创建一个websit1（asp.net网站）
在该项目下生成一个文件夹，命名bin：右键->新建文件夹->bin
然后在该文件件中引入之前生成的dll：bin右键->添加引用->浏览->找到ClassLibrary1.dll
在Default.aspx.cs添加如下代码：
1 using System; 2 using System.Configuration; 3 using System.Data; 4 using System.Linq; 5 using System.Web; 6 using System.Web.Security; 7 using System.Web.UI; 8 using System.Web.UI.HtmlControls; 9 using System.Web.UI.WebControls;10 using System.Web.UI.WebControls.WebParts;11 using System.Xml.Linq;12 using ClassLibrary1;13 public partial class _Default : System.Web.UI.Page 14 {15 protected void Page_Load(object sender, EventArgs e)16 {17 ClassAdd add = new ClassAdd();18 ClassMult mult = new ClassMult();19 add.SetA = 10;20 add.SetB = 11;21 Response.Write(add.getResult().ToString());22 mult.SetA = 10;23 mult.SetB = 11;24 Response.Write("" + mult.getResult().ToString());25 }26 27 } 3.运行website1
网页显示结果：
21
110