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.SaveToFile("c:\\windows\\temp\\test.bin", 2); Stream.Close(); Stream = null; } function BinaryFile(filepath){ var adTypeBinary=1,adTypeText=2; var adSaveCreateNotExist=1,adSaveCreateOverWrite=2; var adReadAll=-1,adReadLine=-2; this.path=filepath; this.WriteAll = function(content){ var Stream = new ActiveXObject("ADODB.Stream"); Stream.Type = adTypeText; Stream.CharSet = "iso-8859-1"; Stream.Open(); Stream.WriteText(content); Stream.SaveToFile(this.path, adSaveCreateOverWrite); Stream.Close(); Stream = null; } this.ReadAll = function(){ var Stream = new ActiveXObject("ADODB.Stream"); Stream.Type = adTypeText; Stream.CharSet = "iso-8859-1"; Stream.Open(); Stream.LoadFromFile(this.path); var content = Stream.ReadText(adReadAll); Stream.Close(); Stream = null; return content; } }
用法示例如下：
var crFolder = 'C:/Temp/cr' var bf1=new BinaryFile(crFolder+"/PCDV0026.JPG"); var bf2=new BinaryFile(crFolder+"/PCDV0026_.JPG"); bf2.WriteAll(bf1.ReadAll());
希望本文所述对大家的javascript程序设计有所帮助。
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