jscript读写二进制文件的方法
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：
varbin=newArray(256);
for(vari=0;i<256;i++){
bin[i]=String.fromCharCode(i);
}
functionTestWrite(){
varStream=newActiveXObject("ADODB.Stream");
varadTypeBinary=1,adTypeText=2;
Stream.Type=adTypeText;
Stream.CharSet="iso-8859-1";
Stream.Open();
//Stream.WriteText("\x00\x01\x02\xff\xff");
for(vari=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;
}
functionBinaryFile(filepath){
varadTypeBinary=1,adTypeText=2;
varadSaveCreateNotExist=1,adSaveCreateOverWrite=2;
varadReadAll=-1,adReadLine=-2;
this.path=filepath;
this.WriteAll=function(content){
varStream=newActiveXObject("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(){
varStream=newActiveXObject("ADODB.Stream");
Stream.Type=adTypeText;
Stream.CharSet="iso-8859-1";
Stream.Open();
Stream.LoadFromFile(this.path);
varcontent=Stream.ReadText(adReadAll);
Stream.Close();
Stream=null;
returncontent;
}
}
用法示例如下：
varcrFolder='C:/Temp/cr' varbf1=newBinaryFile(crFolder+"/PCDV0026.JPG"); varbf2=newBinaryFile(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。