Javascript FileReader onload not firing

Question

I haven\'t used JavaScript in a while and I can\'t seem to read a text file and display the contents.

I\'ve tried onload as well as onloadend

Answer 1

Nothing worked for me. Below you can find my ugly solution, but it was the only one that did the job. In my case the user can upload up to 3 files, so the var iPDF can be 0,1,2.

	var iPDF=UpdatedExistingNumberOfPDFfiles;
	if (iPDF < NoMaxPDFfiles) {
		var reader = new FileReader();
		reader.readAsDataURL(files[iPDF-UpdatedExistingNumberOfPDFfiles]);
		reader.onload = function (){
		var PDFdataURL = reader.result;
		var xhr = new XMLHttpRequest();
		xhr.open("POST", "Observation_PDFUpload.php",true);
		xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		var NumberOfPDFfile = iPDF+1;
		xhr.send("PDFfileURL="+PDFdataURL+"&PDFfileName="+PDFfileName+"-Annex-"+NumberOfPDFfile);
		iPDF++;
		if (iPDF < NoMaxPDFfiles) {
			reader.readAsDataURL(files[iPDF-UpdatedExistingNumberOfPDFfiles]);
			reader.onload = function (){
			PDFdataURL = reader.result;
			var xhr1 = new XMLHttpRequest();
			xhr1.open("POST", "Observation_PDFUpload.php",true);
			xhr1.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
			NumberOfPDFfile = iPDF+1;
			xhr1.send("PDFfileURL="+PDFdataURL+"&PDFfileName="+PDFfileName+"-Annex-"+NumberOfPDFfile);
			iPDF++;	
			if (iPDF < NoMaxPDFfiles) {
			reader.readAsDataURL(files[iPDF-UpdatedExistingNumberOfPDFfiles]);
			reader.onload = function (){
			PDFdataURL = reader.result;
			var xhr2 = new XMLHttpRequest();
			xhr2.open("POST", "Observation_PDFUpload.php",true);
			xhr2.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
			NumberOfPDFfile = iPDF+1;
			xhr2.send("PDFfileURL="+PDFdataURL+"&PDFfileName="+PDFfileName+"-Annex-"+NumberOfPDFfile);
			}	
			}			
		
			}
		}
		}
		};