Node Webkit: Export Data To Csv And Prompt The User To Save The File

I could implement the export data to csv on node webkit with node fs modules. But now I want to prompt the user to save the file in his/her desired location. Like the download pop-

Solution 1:

I found a solution here http://9ijy.net/blog/view/6

Step 1 In your html file, add a Input tag block like below:

<inputid="export_file"type="file" nwsaveas style="display:none" nwworkingdir=""/>

Step 2 Add a new function in your javascript file like below:

functionsaveFile(name,data) {
    var chooser = document.querySelector(name);
    chooser.addEventListener("change", function(evt) {
      console.log(this.value); // get your file namevar fs = require('fs');// save it now
fs.writeFile(this.value, data, function(err) {
    if(err) {
       alert("error"+err);
    }
});
    }, false);

    chooser.click();  
  }

Step 3 Save your file where ever you like by using saveFile(name,data) function like below:

...

_exportCSV="you data to save";

saveFile('#export_file',_exportCSV);

Solution 2:

• You are writing the file dialog code as a callback to fs.writeFile. A callback means it will be called AFTER the file is saved. This is what might be happening right now. 1) File is written in the current directory where node-webkit app is running from. 2) When the file is saved without any errors, the dialog shows up. But this dialog is of no help.
• Instead, show the dialog earlier and get the file-path from it(https://github.com/rogerwang/node-webkit/wiki/File-dialogs). Pass this path as the first arg in fs.writeFile(). Done.