flex save chart

最新推荐文章于 2026-01-03 09:09:14 发布

原创最新推荐文章于 2026-01-03 09:09:14 发布 · 1.4k 阅读

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#flex #string #firefox #cgi #button #function

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本文介绍了一种使用Flex进行屏幕截图的方法，并将其转换为Base64编码字符串以便于在网络上传输。此外，还提供了如何利用Perl CGI脚本解析Base64编码字符串并返回图像数据的具体实现。

flex:

chartPanel是要save的元件

<mx:Button label="Save Image" click="displayChart(chartPanel)"/>

public function takeSnapshot(comp:DisplayObject):void
{
//for flex_2

            var bd:BitmapData = new BitmapData(comp.width,comp.height);
            bd.draw(reportTile);
            var ba:ByteArray = PNGEnc.encode(bd);
            var b64Encode:Base64Encoder = new Base64Encoder();
            b64Encode.encodeBytes(ba);

var b64String = b64Encode.flush();

//for flex_3

            var snapshot:ImageSnapshot = ImageSnapshot.captureImage(comp);
          var b64String:String = ImageSnapshot.encodeImageAsBase64(snapshot);
           //for firefox
            //var u:URLRequest = new URLRequest("data:image/png;base64,"+b64String );
           //for IE & firefox

            var u:URLRequest = new URLRequest(urlString +"/displaychart.cgi");
            var v:URLVariables = new URLVariables();
            v.imageString = b64String ;
            u.data = v;
            u.method = URLRequestMethod.POST;
            navigateToURL(u,"_blank");
        }

displaychart.cgi

#!c:/perl/bin/perl -w
use strict;
use Net::LDAP;
use DBI;
use CGI qw/:standard/;
use MIME::Base64;

#print "Content-type: application/octet-stream/n";
#print "Content-Disposition: attachment; filename=chart.png/n/n";
print "Content-type: image/png/n/n";

print decode_base64(param('imageString'));