jscript讀寫(xiě)二進(jìn)制文件的方法

    jscript讀寫(xiě)二進(jìn)制文件的方法
    這篇文章主要介紹了jscript讀寫(xiě)二進(jìn)制文件的方法,涉及javascript中ActiveXObject對(duì)象的使用技巧,具有一定參考借鑒價(jià)值,需要的朋友可以參考下
    本文實(shí)例講述了jscript讀寫(xiě)二進(jìn)制文件的方法。分享給大家供大家參考。具體實(shí)現(xiàn)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());
    希望本文所述對(duì)大家的javascript程序設(shè)計(jì)有所幫助。