.NET在VS2008中生成DLL并调用

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：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ClassLibrary1
{
    public class Class1
    {
        private int a = 0;
        private int b = 0;
        public int SetA
        {
            get { return a; }
            set { a = value; }
        }

        public int SetB
        {
            get { return b; }
            set { b = value; }
        }
        public int getResult()
        {
            return a - b;
        }
    }
}

创建两个子类：

//子类ClassAdd
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ClassLibrary1
{
    public class ClassAdd : Class1
    {
        public int getResult()
        {
            return SetA + SetB;
        }
    }
}

//子类ClassMult
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ClassLibrary1
{
    public class ClassMult : Class1
    {
        public int getResult()
        {
            return SetA * SetB;
        }
    }
}

生成解决方案，在ClassLibrary1ClassLibrary1inDebug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：

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using ClassLibrary1;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        ClassAdd add = new ClassAdd();
        ClassMult mult = new ClassMult();
        add.SetA = 10;
        add.SetB = 11;
        Response.Write(add.getResult().ToString());
        mult.SetA = 10;
        mult.SetB = 11;
        Response.Write("<br />" + mult.getResult().ToString());
    }
 
}

3.运行website1

 网页显示结果：

21
110