ExtJs的Ajax示例-原创手记-慕课网

ExtJs对于Ajax的使用非常简单，看下面的代码:

1.Html页：

<!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 >
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>    
    <link rel="stylesheet" type="text/css" href="js/ext2.2/resources/css/ext-all.css" /> 
     <script type="text/javascript" src="js/ext2.2/adapter/ext/ext-base.js"></script>    
    <script type="text/javascript" src="js/ext2.2/ext-all.js"></script>
    <title></title>
</head>
<body>
<script type="text/javascript">
    Ext.onReady(function() {
        var fnAjaxDemo = function() {
            var mydata;
            Ext.Ajax.request({
                url: "GetData.ashx?name=" + encodeURIComponent(Ext.get("name").dom.value), //服务器端地址
                success: function(request) {
                    mydata = request.responseText; //服务器端文本数据                    
                    Ext.MessageBox.alert("返回值",mydata);
                },
                failure: function() {
                    alert("failure!");
                }
            });
        }
        Ext.get("btnTest").on("click", fnAjaxDemo);
    })
</script>
   
        <input id="name" value="Jimmy" name="name" />
        <button id="btnTest">获取服务端信息</button>
    
</body>
</html>

2.服务端GetData.ashx

using System.Web;
using System.Web.Services;
namespace Ajax_WCF
{
    /// <summary>
    /// codebehindclassname 的摘要说明
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    public class GetData : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            if (context.Request["name"] != null && context.Request["name"].ToString()!="")
            {
                context.Response.Write("Hello World," + context.Request["name"].ToString() + "!");
            }
            else 
            {
                context.Response.Write("Hello World");
            }
        }
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}