Tizen Developers

Why csv?

Why not JSON?

Your widget has a "private local storage", your file probably stored there

When you create the "File", where do you create it? Why don't you save it under location you choose?

How can we help you without sample of the code?

I am interested to do basically the same thing, so please post here if you find a solution. Thanks!

Hi Chen,

I am also trying to do the same thing. I need to collect the Accelerometer Data and Gyroscope Data by 'devicemotion' event. I am able to save the data into Index DB database. I was trying to read the data from database and save it into txt file. The Problem is the event listener is keeping inserting data into database and while I am reading the data It seems I am getting part of the data, not full data in the database. Do I need to read in different thread? Is it possible to implement multithreading in JavaScript? Any suggestion for me? Thanks in Advance.

Hi Colin,

Thanks for your reply. I need some more help. I need to read part of the data (I am saving timestamp in Indexed DB, I need to read all the data within the given timestamp range) from database and save it in a file. I am wondering how can I perform the query in Index DB. I am pretty new in Tizen development. I have another basic question, I want to post questions in this developer site, but I am unable to find any option or button for that. I appreciate any help.

Thanks in advance! 

Hi,

Thanks for quick reply. I was trying to save data from a IndexDB object store to a file in the following manner. But I am getting "IOError: Stream is closed." while reading from cursor and trying to write the string to the file in line 40 (

fs.write(string); //getting error at this line

)

any idea why I am getting this error? Thanks In Advance 

$("#exportall").click(function() {
    			
				var documentsDir;
				function onresolveerror(error) 
				{
					console.log("The error " + error.message
							+ " occurred when listing the files in the selected folder");
				}
				function onresolvesuccess(files) 
				{

					var d = new Date().getTime();
					//console.log(d + ".txt");

					var testFile = documentsDir.createFile(d + ".txt");

					if (testFile !== null) 
					{
						testFile.openStream("rw", function(fs) {
							try {
								
								/*var i=0;  //this testing works fine and writes to the file
								for(i=0;i<10000;i++)
								{
									fs.write(1420579156522+" "+ -1.31605+" "+\n");																	
								}*/
								
								var string="";
								
								var objectStore = db.transaction([ "mydb" ], "readonly").objectStore("mydb");

								var index = objectStore.index("id");

								index.openCursor().onsuccess = function(event) {
									var cursor = event.target.result;
									if (cursor) {
										string=cursor.key+" "+cursor.value.x+"\n";
										console.log(string);										
										fs.write(string); //getting error at this line
										cursor.continue();
									}
									else {
										console.log("No more entries.");
									}
								};
																
								console.log(fs.position);
								fs.close();
								
							} 
							catch (err) 
							{
								console.log("exception [" + err.name + "] msg[" + err.message
										+ "]");
							}
						}, function(e) {
							console.log("Error " + e.message);
						}, "UTF-8");

					}
				}
				
				tizen.filesystem.resolve('documents', function(dir) {
					documentsDir = dir;
					dir.listFiles(onresolvesuccess, onresolveerror);
				}, function(e) {
					console.log("Error" + e.message);
				}, "rw");
			});

Actually I solved the problem by closing the file when the cursor becom empty!

Thnaks for reply :-)