WCF和Ajax的執行個體

最後更新：2018-12-05 來源：互聯網

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在這裡，WCF實現Ajax相同的效果。使用的是啟動了Ajax的WCF服務，即在頁面訪問的時候不會重新整理頁面。本執行個體是為了方便WCF和Ajax的比較，對WCF服務和Ajax的原理沒有進行講解，只是簡單的使用執行個體代碼而已。

今天寫WCF服務代碼的時候突然短路了，寫這篇也為了以後方便查看樣本，快速熟悉。

一、Ajax的源碼

1、建立一個Handler或者aspx頁面，這裡建立一個Handler頁面：NowTimeHandler

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

namespace MyWeb
{
    /// <summary>
    /// $codebehindclassname$ 的摘要說明
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class NowTimeHandler : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string nowtime = DateTime.Now.ToString("yyyy年MM月dd日hh時mm分ss秒fff毫秒");
            context.Response.Write(nowtime);
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

2、訪問頁面：Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="MyWeb._Default" %>

<!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>
    <script type="text/javascript">4
        function getTime() {
            var xmlhttp;
            if (window.XMLHttpRequest) {
                xmlhttp = new XMLHttpRequest();
            } else {
                xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            xmlhttp.open("GET", "NowTimeHandler.ashx?date=" + new Date().getSeconds(), false);
            xmlhttp.onreadystatechange = function() {
                if (xmlhttp.readyState == 4) {
                    if (xmlhttp.status == 200) {
                        document.getElementById("lblTime").innerHTML = xmlhttp.responseText;
                    }
                }
            }
            xmlhttp.send();
        }
        setInterval("getTime()", 1);
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <label id="lblTime"></label>
    </div>
    </form>
</body>
</html>

二、WCF實現相同的Ajax功能

1、建立一個啟動了Ajax服務的WCF服務項：ServiceNowTime.svc

using System;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Activation;
using System.ServiceModel.Web;

namespace MyWeb.MyWCF
{
    [ServiceContract(Namespace = "tnj")]
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class ServiceNowTime
    {
        // 添加 [WebGet] 屬性以使用 HTTP GET
        [OperationContract]
        public void DoWork()
        {
            // 在此處添加操作實現
            return;
        }

        [OperationContract]
        public string GetNowTime()
        {
            //string nowtime = DateTime.Now.ToString();
            string nowtime = DateTime.Now.ToString("yyyy年MM月dd日hh時mm分ss秒fffff毫秒");
            return nowtime;
        }

// 在此處添加更多操作並使用 [OperationContract] 標記它們
}

    [DataContract]
    public class Person
    {
        [DataMember]
        public int ID { get; set; }
        [DataMember]
        public string Name { get; set; }
        [DataMember]
        public int Age { get; set; }
        [DataMember]
        public string Address { get; set; }
    }
}

2、建立訪問WCF服務的頁面：WebForm1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="MyWeb.MyWCF.WebForm1" %>

<!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>
    <script type="text/javascript">
        function getNowTime() {
            tnj.ServiceNowTime.GetNowTime(function(data) {
                document.getElementById("lblNowTime").innerHTML = data;
            }, function(data) {
                alert(data.get_message());
            });
            window.setTimeout("getNowTime()", 1);
        }
    </script>
</head>
<body onload="getNowTime()">
    <form id="form1" runat="server">
    <asp:ScriptManager ID="sm1" runat="server">
        <Services>
            <asp:ServiceReference Path="~/MyWCF/ServiceNowTime.svc" />
        </Services>
    </asp:ScriptManager>
    <div>
        <label id="lblNowTime"></label>
    </div>
    </form>
</body>
</html>

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

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