FILING WITH JAVASCRIPT Filing operations are not native to Javascript. However, in desktop applications, ActiveX can be used in conjuction with Javascript. All the normal file operations, reading/writing/appending data, creating folders, setting attributes, etc can be done with Internet Explorer and Windows. A useful file-listing function is also shown.
These functions provide access to folders and files. They use JScript 3.0 & ActiveX. Global Variables needed for filing:
gFile = ''; // Global
gpath = ''; // Global - set this prior to calling the function, eg, "C:\\Folder01\\Folder02\\mydata.txt" fso = new ActiveXObject("Scripting.FileSystemObject");
ForWriting = 2;
ForReading = 1;
ForAppending=8;
CreateIt = true;
AsciiMode = 0;
function OpenFile(Action) {
if((Action==ForReading)&&(fso.FileExists(gpath))) {
gFile = fso.OpenTextFile(gpath,ForReading,false,AsciiMode);
}
else {
if (Action == ForWriting) {
gFile = fso.OpenTextFile(gpath,ForWriting,CreateIt,AsciiMode);
}
else{
if((Action==ForAppending)&&(fso.FileExists(gpath))) {
gFile=fso.OpenTextFile(gpath,ForAppending,false,AsciiMode);
}
}
}
}
function DeleteFile() {
if (fso.FileExists(gpath)) {
var afile = fso.GetFile(gpath);
afile.Attributes[0];
afile.Delete();}
}
function CopyFile(FromFile,ToFile,overwrite) { // Set overwrite to true or false; FromFile, etc = full paths
var f = fso.GetFile(FromFile);
f.Attributes[0];
f.Copy(ToFile,overwrite);
}
function MakeFolder(NewFolderName,DesiredPath){
NewFolderName = fso.CreateFolder(DesiredPath); // 'DesiredFolderPath' : e.g., "C:\\MainFolder\\NewFolderName".
}
function DeleteFolder(){ // where gpath = full folder path
if (fso.FolderExists(gpath)) {var afolder = fso.GetFolder(gpath); afolder.Delete();}
}
function CopyFolder(FromFolder,ToFolder,overwrite) { // where FromFolder, etc = full folder paths
var f = fso.GetFolder(FromFolder);
f.Copy(ToFolder,overwrite);
}
// The ListFile function is helpful if you want to have an array of file-names or last-modified dates, etc:
function ListFile(ThePath,TheArr,Ext){ // Builds an array of found file-names in ThePath folder.
var filName='*';
var i=0;
if(ThePath.length>0 && fso.FolderExists(ThePath)){
var foldName=fso.GetFolder(ThePath);
var eNum=new Enumerator(foldName.Files);
for(var i=0;!eNum.atEnd();eNum.moveNext()){
if((filName=="*")||(eNum.item().name.slice(0,eNum.item().name.lastIndexOf(".")).toLowerCase().indexOf(filName)>-1)){
if((Ext=="*")||(eNum.item().name.slice(eNum.item().name.lastIndexOf(".")+1).toLowerCase().indexOf(Ext)>-1)){
TheArr[i]=eNum.item().name; // Builds array of file names found
i++;
}
}
}
}
}
// Use ListFile thus:
var tArr=new Array();
var gpath='C:\\BlahBlah';
ListFile(gpath,tArr,'csv'); // List the .csv files, for instance
// sort tArr with SortIt(tArr)
var FileDate=Date.parse(fso.GetFile(gpath).DateLastModified); // get Last Modified Date of a file
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