B4J Question ServerExampleNoMySql

[Johan Schoeman]

I am testing the B4J app from here (ServerExampleNoMySql) and got it working.

https://www.b4x.com/android/forum/threads/webapp-web-apps-overview.39811/

I start the app and all if fine and working

I start Internet Explorer (11) and browse to

http://165.73.64.74:54021/reports/google_charts.html

I see the chart perfectly. I then stop the B4J process (leaving IE browser alive) and change the Pie Chart code to:

Private Sub CreatePieChartData(cols As List, rows As List)
    cols.Add(CreateColumn("", "Topping", "string"))
    cols.Add(CreateColumn("", "Slices", "number"))
    rows.Add(CreateRow(Array As Object("Mushrooms", 3)))
    rows.Add(CreateRow(Array As Object("B4X", 1)))            'was Onions
    rows.Add(CreateRow(Array As Object("Olives", 1)))
    rows.Add(CreateRow(Array As Object("Zucchini", 1)))
    rows.Add(CreateRow(Array As Object("Pepperoni", 2)))
End Sub

So, I am only changing "Onions" to "B4X". I then run the B4J app again and refresh the IE browser. It still shows "Onions" and not "B4X".

If I however (while the B4J process is still running - i.e not killing it) close IE and restart IE then the new Pie Chart has the correct legend - it then shows "B4X" and not "Onions".

Am I missing something here? Why does the change from "Onions" to "B4X" only takes place when I stop and restart IE?

Rgds

JS

 

[Cableguy]

I would say "cached values" in IE...

Try, without closing the active or page, to open it in a new tab..

 

[Johan Schoeman]

I would say "cached values" in IE...

Try, without closing the active or page, to open it in a new tab..

Same result - it does not reflect the change when a new tab in IE is opened.

 

[Cableguy]

And if you open on a different window?
The behaviour is clearly a cache thing

 

[jimmyF]

Ctrl-F5 maybe?

 

[Johan Schoeman]

Ctrl-F5 maybe?

No joy - same result

 

[Johan Schoeman]

And if you open on a different window?
The behaviour is clearly a cache thing

Different/new Window makes no difference. Still shows the same "legend" and not the "changed" legend.

 

[Johan Schoeman]

It only seems to update the changed legend when I shut down/close IE and then restart it....

 

[inakigarm]

It only seems to update the changed legend when I shut down/close IE and then restart it....

Does it happen with other browsers -Chrome,Firefox- ? Maybe the caching system works differently on IE

 

[Johan Schoeman]

Does it happen with other browsers -Chrome,Firefox- ? Maybe the caching system works differently on IE

Interesting - it works with Chrome...So why does IE not "refresh" the same as what Chrome does? How does one get around this issue to ensure IE responds the same way as Chrome?

 

[Cableguy]

Can't you issue a "refresh browser" command from your server?

 

[Erel]

The problem is in the ajax calls. Add: cache: false

Example:

$.ajax({
               url: "chartsHelper?type=bar",
               dataType:"json",
               cache: false,
               success: function(result) {
                   var data = new google.visualization.DataTable(result.data);
                   var chart = new google.visualization.BarChart($("#bar_chart")[0]);
                   chart.draw(data, result.options);
               }
           });

This goes to the google_charts.html file.

 

[DonManfred]

So why does IE not "refresh" the same as what Chrome does?

Because it is IE! It never worked like other Browsers. That´s the reason i do NOT use IE at all.