I am trying to allow a user to download data he has manipulated in a
GWT application in CSV format by clicking a button. I do not want to
have to go back to the server to create/download this CSV file since I
already have the data I need for the file in the client. I did not
see a way to accomplish this in the GWT API, so I went the native
JavaScript route. I created these methods:
private native Object exportOpen() /*-{
var win = window.open("", "export", "");
var doc = win.document;
doc.open("text/csv", "replace");
return win;
}-*/;
private native void exportWrite(Object win, String line) /*-{
win.document.writeln(line);
}-*/;
private native void exportClose(Object win) /*-{
win.document.close();
}-*/;
And when a button is clicked, the following method is called:
private void export() {
Object win = exportOpen();
// Actual code loops through data and writes lines, but for
example...
exportWrite(win, "TEST,TEST,TEST");
exportClose(win);
}
This code basically works, except for the fact that the output is just
displayed in a new browser window without prompting the user with the
open/save dialog, which is what I was after.
Does anyone know how I can get the open/save dialog to be opened for
the user? Or, is there a way to create and download this data in GWT
without using native JavaScript?
Thanks for your help.
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