读写jscript读写二进制文件的方法

jscript读写二进制文件的方法

这篇文章主要介绍了 jscript读写二进制文件的方法涉及javascript中ActiveXObject对象的使用技巧具有一定参考借鉴价值需要的朋友可以参考下

本文实例讲述了jscript读写二进制文件的方法。分享给大家供大家参考。具体实现方法如下var bin=new Array(256);for(var i=0; i<256; i++){bin[i]=String.fromCharCode(i);

}function TestWrite(){var Stream=new ActiveXObject("ADODB.Stream");var adTypeBinary=1,adTypeText=2;

Stream.Type=adTypeText;

Stream.CharSet="iso-8859-1";

Stream.Open();

//Stream.WriteText("\x00\x01\x02\xff\xff");for(var i=0; i<256; i++){

Stream.WriteText(String.fromCharCode(i));

//Stream.WriteText(bin[i]);

}

Stream.SaveToFi le("c:\\windows\\temp\\test.bin”,2);

Stream.Close();

Stream=nul l ;

}function BinaryFi le(fi lepath){var adTypeBinary=1,adTypeText=2;var adSaveCreateNotExist=1,adSaveCreateOverWrite=2;var adReadAl l=-1,adReadLine=-2;this.path=fi lepath;this.WriteAl l=function(content){var Stream=new ActiveXObject("ADODB.Stream");

Stream.Type=adTypeText;

Stream.CharSet="iso-8859-1";

Stream.Open();

Stream.WriteText(content);

Stream.SaveToFi le(this.path,adSaveCreateOverWrite);

Stream.Close();

Stream=nul l ;

}this.ReadAl l=function(){var Stream=new ActiveXObject("ADODB.Stream");

Stream.Type=adTypeText;

Stream.CharSet="iso-8859-1";

Stream.Open();

Stream.LoadFromFi le(this.path);var content=Stream.ReadText(adReadAl l);

Stream.Close();

Stream=nul l ;return content;

}

}

用法示例如下var crFolder='C:/Temp/cr'var bf1=new BinaryFi le(crFolder+"/PCDV0026.JPG”);var bf2=new BinaryFi le(crFolder+"/PCDV0026_.JPG");bf2.WriteAl l(bf 1 .ReadAl l());

希望本文所述对大家的javascript程序设计有所帮助。更多信息请查看IT技术专栏