extjs 同步和异步请求
同步方式请求：
var conn = Ext.lib.Ajax.getConnectionObject().conn;
conn.open("GET", 'your url',false);
conn.send(null);
alert(conn.responseText);
或者
var conn = Ext.lib.Ajax.getConnectionObject().conn;
conn.open("POST", url, false);
conn.send("发送到服务器端的信息");
data = conn.responseText;
alert(data);
关键是要设置false这个参数
异步方式请求：
Ext.Ajax.request({
url : 'listpublishersms.action',
success : function(response, options) {
var temp = "<chart caption='" + startField.getValue().dateFormat("Y-m-d") + "至"
+ endField.getValue().dateFormat("Y-m-d") + "' baseFontSize='12' formatNumberScale='0' showBorder='1'>";
var responseArray = Ext.util.JSON .decode(response.responseText);
alert(responseArray.list.length);
for (var i = 0;i < responseArray.list.length ;i++) {
var pname = responseArray.list[i].pname;
var count = responseArray.list[i].count;
temp += "<set label='" + pname + "' value='" + count + "'/>";
}
temp += "</chart>";
chart_chart.setDataXML(temp);
}
});