（学习Asp.net Ajax笔记二）异步通信层

前言

说句心里话，本是此刻才开始对微软MSDN有所感觉，觉得这里才是技术与解决问题的海洋词典。也许从事编程就是这样吧，也不能从一开始学就扎进MSDN，我觉得那样应该会感觉到很累吧，当已经进入到编程世界的时候，接下来再从MSDN也只能从MSDN上汲取养料，我觉得这应该是一条健康学习编程之路吧。

异步通信层示例

Employee类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
///Employee 的摘要说明
/// </summary>
public class Employee
{
    private string _FirstName;
    private string _LastName;
    private string _Title;

    public Employee() { }

    public Employee(string firstName, string lastName, string title)
    {
        this._FirstName = firstName;
        this._LastName = lastName;
        this._Title = title;
    }

    public string FirstName
    {
        get
        {
            return this._FirstName;
        }
    }

    public string LastName
    {
        get
        {
            return this._LastName;
        }
    }

    public string Title
    {
        get
        {
            return this._Title;
        }
    }
}

GetEmployee.ashx

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

using System;
using System.Web;
using System.Web.Script.Serialization;

public class GetEmployee : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";

        string firstName = context.Request.Params["firstName"];
        string lastName = context.Request.Params["lastName"];
        string title = context.Request.Params["title"];

        Employee employee = new Employee(firstName, lastName, title);
        
        //实例化成JSON
        JavaScriptSerializer serializer = new JavaScriptSerializer();
        string jsonEmp = serializer.Serialize(employee);

        context.Response.Write(jsonEmp);
        
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}

AsyncComLayer.aspx

<%@ Page Language="C#" %>

<!DOCTYPE html>


<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
        <script type="text/javascript">
            function showEmployee(firstName, lastName, title)
            {
                var request = new Sys.Net.WebRequest();
                request.set_url("GetEmployee.ashx");
                request.set_httpVerb("post");
                request.add_completed(onGetEmployeeComplete);

                var requestBody=String.format("firstName={0}&lastName={1}&title={2}",
                    encodeURI(firstName),
                    encodeURI(lastName),
                    encodeURI(title))

                request.set_body(requestBody);

                request.invoke();
                }
            
            function onGetEmployeeComplete(response)
            {
                //两个get_没有智能提示，大小写不能出错
                if (response.get_responseAvailable()) {
                    var employee = response.get_object();
                    alert(String.format("firstName={0},lastName={1},title={2}",
                        employee.FirstName,   //没有智能提示，是大写，也就是类的属性
                        employee.LastName,
                        employee.Title));
                }
            }
    </script>

        <input type="button" value="Bill Gates"
			οnclick="showEmployee('Bill', 'Gates', 'Chair man')" />
		<input type="button" value="Steve Ballmer"
			οnclick="showEmployee('Steve', 'Ballmer', 'CEO')" />
    <div>
    
    </div>
    </form>
</body>
</html>

yjjm1990

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（学习Asp.net Ajax笔记二）异步通信层

前言

异步通信层示例

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