今天绵阳动力网络公司为为大家带来关于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：

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());