通用的ashx调用

直接上代码

还是有一定通用性的

<%@ WebHandler Language="C#" Class="MyService" %>



using System;

using System.Web;

using System.Collections.Generic;

/// <summary>

/// 测试访问路径：http://localhost:2484/TestAjaxFrameWork/MyService.ashx?c=class1&m=hello&parm1=23&parm2=33&parm3=4

/// </summary>

public class MyService : IHttpHandler

{



    public void ProcessRequest(HttpContext context)

    {

        AjaxHelper ajax = new AjaxHelper(context.Request.QueryString["c"], context.Request.QueryString["m"]);

        List<string> objlist = new List<string>();

        foreach (string item in context.Request.QueryString.Keys)

        {

            if (item != "c" && item != "m")

            {

                objlist.Add(context.Request.QueryString[item]);

            }

        }

        object[] parms = objlist.ToArray();

        ajax.ProcessRequest(context, parms);

    }



    public bool IsReusable

    {

        get

        {

            return false;

        }

    }

}

　　

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Reflection;

using System.Collections;

using System.Web.Compilation;

using System.Web;



/// <summary>

/// AjaxHelper 的摘要说明

/// </summary>

public class AjaxHelper

{

    /// <summary>

    /// 要访问的类名

    /// </summary>

    public string ClassName { get; set; }



    /// <summary>

    /// 要访问的方法

    /// </summary>

    public string MethodName { get; set; }



    /// <summary>

    /// 构造函数初始化类名，方法

    /// </summary>

    /// <param name="className"></param>

    /// <param name="methodName"></param>

    public AjaxHelper(string className, string methodName)

    {

        this.ClassName = className;

        this.MethodName = methodName;

    }



    public void ProcessRequest(HttpContext context, object[] parms)

    {

        //类名方法名不能为空啊

        if (string.IsNullOrEmpty(this.ClassName) || string.IsNullOrEmpty(this.MethodName))

        {

            Report404Error(context);

            return;

        }



        //获取当前程序集，这就限定了，调用的ajax类必须和当前类是一个程序集了

        Assembly curAssembly = Assembly.GetExecutingAssembly();



        //取得包含ajax类特性的公共类

        var ts = from t in curAssembly.GetExportedTypes()

                 let a = (AjaxClassAttribute[])t.GetCustomAttributes(typeof(AjaxClassAttribute), false)

                 where a.Length > 0

                 select t;



        //获取当前访问的类型

        Type type = ts.FirstOrDefault(t => string.Compare(this.ClassName, t.Name, true) == 0);



        //获取当前访问的方法

        MethodInfo method = type.GetMethod(this.MethodName,

                         BindingFlags.Static | BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);



        //检测是否包含ajax方法特性

        AjaxMethodAttribute[] attrs = (AjaxMethodAttribute[])

                                            method.GetCustomAttributes(typeof(AjaxMethodAttribute), false);

        if (attrs.Length != 1)

        {

            Report404Error(context);

        }

        //调用方法奥

        method.Invoke(Activator.CreateInstance(type), parms);

    }



    private void Report404Error(HttpContext context)

    {

        throw new HttpException(404,

                "没有找到能处理请求的服务类，当前请求地址：" + context.Request.RawUrl);

    }

}

/// <summary>

/// 自定义特性，表示ajax类

/// </summary>

public class AjaxClassAttribute : Attribute

{



}



/// <summary>

/// 自定义特性，表示ajax方法奥

/// </summary>

public class AjaxMethodAttribute : Attribute

{



}

　　

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;



[AjaxClass]

/// <summary>

/// Class1 的摘要说明

/// </summary>

public class Class1

{

    public Class1()

    {

        //

        // TODO: 在此处添加构造函数逻辑

        //

    }



    [AjaxMethod]

    public void hello(string parm1, string parm2, string parm3)

    {

        HttpContext.Current.Response.Write("test context," + parm1 + "," + parm2 + "," + parm3 + ",");

    }

}