第一步:引入相应js

    
<link href="../ExtJs/resources/css/ext-all.css" rel="stylesheet" type="text/css" />
    <script src="../ExtJs/adapter/ext/ext-base.js" type="text/javascript"></script>
    <script src="../ExtJs/ext-all.js" type="text/javascript"></script>

    第二步:写代码 如下
    
<script language="javascript" type="text/javascript">
        Ext.onReady(
function () {

            Ext.get(
'btnSave').on('click'function () {
                Ext.Msg.wait(
'处理中,请稍后...''提示'); //进度条等待
                Ext.Ajax.request({
                    method: 
'post'//Get和Post方法
                    url: 'Ajax.ashx'//提交地址
                    success: function (result) {
                        Ext.Msg.hide();
                        
//返回内容result.responseText
                        Ext.Msg.alert(result.responseText);
                    },
                    failure: 
function (result) {
                        
//返回内容result.responseText
                    }
                });
            });

        });
    
</script>

    第三步:添加html控件标记
   
<!--html按钮标记-->
   
   
<input type="button" value="click on me" id="btnSave" />

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