flex接收处理url后跟的参数

首先解释下本文要讨论的内容。。。

flex开发生成的网页有如下形式

 

http://myserver/flexdev/index.html

这是最常见的一种，其实这个url后面可以跟参数，比如

 

http://myserver/flexdev/index.html?username=111&password=222

在flex程序中如何接收这些传递过来的参数值？这是这篇博文要讨论的

 

 有两种方式可以接收客户端传递过来的参数

方式一：

var userName:String = FlexGlobals.topLevelApplication.parameters.username;
var password:String = FlexGlobals.topLevelApplication.parameters.password;
if (userName && password)
{
    ......
}

 方式二：

 

private function setUrlParams():Ojbect
{
    var urlParams:Object = {};//诸如{username:111, password:222}的url参数键值对
    if (!ExternalInterface.available)
    {
        return urlParams;
    }

    try
    {
        var queryStringFromUrl:String = ExternalInterface.call("window.location.search.substring", 1);//得到username=111&password=222
        if (queryStringFromUrl)
        {
            var params:Array = queryStringFromUrl.split('&');
            var length:uint = params.length;

            for (var i:uint = 0, index:int = -1; i < length; i++)
            {
                var kvPair:String = params[i];
                if ((index = kvPair.indexOf("=")) > 0)
                {
                    var key:String = kvPair.substring(0, index);
                    var value:String = kvPair.substring(index + 1);
                    if (key)
                    {
                        urlParams[key] = decodeURIComponent(value);
                    }
                }
            }
        }
    }
    catch (error:Error)
    {
        Alert.show("Some error occurred. ExternalInterface doesn't work in Standalone player.");
    }
    return urlParams;
}

var urlParams:Object = setUrlParams();
var userName:String,password:String;
if (urlParams.username)
{
    userName = urlParams.username;
}
if (urlParams.password)
{
    password = urlParams.password;
}
if (userName && password)
{
    ......
}