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Migrated from 2.0 to 2.1 beta - map hangs

IdoFlatow

I've been working with the 2.0 version of the map control and today I installed version 2.1 beta to check the touch and gestures. When I zoom in and pan with the 2.1 version that WPF applications hangs for a few seconds and then performs the operations. This behavior happens all the time (WPF app hangs for couple of seconds on zoom and pan) in v2.1 and did not happen in v2.0

I'm using the simplest example of a user control containing a map with a single layer (tried both arcgis and bing).

Hope this bug can be fixed.

Ido.

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AlbertHasson

Hi
Has this bug definitely been fixed in version 2.1 (Dec 2010)? I've tried out the the WPF libraries with the simplest map from the samples site in a small test app (as has been done in this thread) and the application hangs terribly when zooming/panning too quickly. For example, this often happens when zooming in several levels (using the mouse wheel) and then panning. Perhaps a factor that is amplifying the problem is that our Internet connection is quite slow/congested. As mentioned previously, I couldn't reproduce this using the silverlight version.

Looking forward to your response.

JenniferNery

It really is difficult to give an estimated date for v2.1 RTM as it goes through different departments within ESRI for approval, release and setup. I can tell you that we are trying to get it out soon, but 'soon' is subjective and our team does not have full control of when this is actually delivered to public.

IdoFlatow

That's great news.

We're scheduled to present a sample WPF application using ESRI's controls on the upcomming Microsoft TechEd convention in Israel on the 28th of November.

If you have any preliminary code that you can send me prior that date I'd really appreciate it; it would save me loads of time converting the sample to Silverlight (in SL the hang problem does not exist).

Thanks in advance,
Ido.

JenniferNery

I was able to reproduce this too with v2.1 RC. The fix will be in for the next release.

Thank you.

IdoFlatow

I have another sample that shows the problem with the WPF control VS the Silverlight control.

The following XAML + Code was created in both WPF projects and SL projects:

XAML:
<Window x:Class="TestESRIWPF21RC.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:esri="http://schemas.esri.com/arcgis/client/2009"
        xmlns:bing="clr-namespace:ESRI.ArcGIS.Client.Bing;assembly=ESRI.ArcGIS.Client.Bing"
        Title="MainWindow">
    <Grid>
        <esri:Map x:Name="MyMap" Width="4000" Height="4000">
            <bing:TileLayer ID="BingLayer"
                            LayerStyle="Road"
                            Visible="True"
                            Culture="en-US"
                            Token="{StaticResource BingKey}" />
        </esri:Map>
        <Button Content="hello"
                Width="100"
                Height="100"
                Click="Button_Click"/>
    </Grid>
</Window>

Button event impl:
private void Button_Click(object sender, RoutedEventArgs e)
    {
      MessageBox.Show("Loaded");
    }

The test is as follows - start the application and quickly press the button, wait for the "Loaded" message to appear. The map object is set to a large size to make it load a lot of images on startup.

The results:
Silverlight - pressed the button immediately when the window appears and the messagebox was displayed automatically.
WPF - pressed the button immediately when the window appears, but the application is not responsive, I couldn't even move the application window on my desktop. Only after half a minute, when all the images were loaded, the message box appeared and the application moved on the desktop (performed the drag I tried previously).

Please test this code, this behavior of WPF is very frustrating.

JenniferNery

Thank you for sharing us this information. While our test did not yield to the same sluggishness as in the video, we were able to make a comparison between the two API versions. We will try to get this fixed in the future release.

Thanks.

IdoFlatow

We are aware of one issue that causes wpf to perform worse in some configurations when tiles needs to load, although I've never seen it as slow as you say it is (seems more choppy than "stuck"). We will have that fixed for final release.

Update: I tried again with the WPF sample, this time with the RC version, and the application still frizes.
I've managed to do a screen capture to a video file, demonstrating what I'm trying to do, and it shows quite well that when zooming, a lot of requests are send to the network and the map isn't responsive until all responses are received. When zooming or panning rapidly this behavior causes the application to hang for a few seconds or mode, depending on the network bandwith to the image server (Esri servers seem to be more responsive than Bing).

The video can be downloaded from the following link (compressed into several parts for easier upload):
http://cid-5ef5be1ab30a6056.office.live.com/browse.aspx/ESRI

I very much hope you can solve this issue.

Ido.

IdoFlatow

I'll wait and see, perhaps it is the bug I described. Do you know if this bug also shows up in the Silverlight version?

I'm planning to show a demo of an ESRI app using multitouch in the upcoming Microsoft Tech-Ed convention in Israel in a few weeks and currently it's either use the Silverlight version (if the bug isn't present there) or wait for the release of the 2.1 version. Any idea when the release will be?

Thanks,
Ido.

SomeGISGuy

We are aware of one issue that causes wpf to perform worse in some configurations when tiles needs to load, although I've never seen it as slow as you say it is (seems more choppy than "stuck"). We will have that fixed for final release.

IdoFlatow

I cannot reproduce this with your code but I am using a different hardware. Maybe another process is interfering or causing your WPF App to hang or become sluggish. I know that one of my co-workers notice that our Anti-Virus update checker can do this to any WPF app.

Not sure that an external app causes this. I'm talking about two different computers with two different sets of hardware. I mention this again - when replacing the 2.1 version with the dlls from the 2.0 version is works fine !! on both machines !!

I guess I'll just have to wait for the official 2.1 version to see it this problem goes away...

JenniferNery

I cannot reproduce this with your code but I am using a different hardware. Maybe another process is interfering or causing your WPF App to hang or become sluggish. I know that one of my co-workers notice that our Anti-Virus update checker can do this to any WPF app.

IdoFlatow

No updates? it seems that 7 days should be suffice to check if it is a bug or something else...

IdoFlatow

Any progress with identifying this bug?

I've tried placing some controls on top of the map (button, treeview...) and it seems that when the application freezes after panning and zooming, the controls freeze also and do not respond to events. Only after the application stops freezing, the events are raised.

IdoFlatow

Hi,

I'm using this simple code on my laptop which is a dell studio xps 1645 with core i7 720, 8gb ram, ati radeon hd 4670:
<Window x:Class="WpfApplication4.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:esri="http://schemas.esri.com/arcgis/client/2009"
        Title="MainWindow">
    <Grid>
        <esri:Map x:Name="MyMap">
            <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer"
                                             Url="http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer" />
        </esri:Map>
    </Grid>
</Window>

Running under .NET 4, WPF.

When using the dlls from version 2.0.0.314, performing zoom in/out and panning rapidly works quite well and the "flow" of the screen is clear. When removing the old dlls and placing the dlls from version 2.1.0.401, the application gets sluggish, hangs when panning for a few ms, and then just skips to the target extent without showing the "flow". This is even worse when trying to use touch because you keep touching the screen which only increases the delay and hang.

If you are trying to reproduce this problem, please make sure you try it with a slow network that produces many waiting requests (when running with my machine on a slow internet bandwidth, I got up to 80 waiting requests).

SomeGISGuy

That's interesting. We actually have several of those laptops and haven't noticed that happening.

IdoFlatow

I've tried to use the simple gis samples from the WPF SDK and also wrote a simple application like so:

<UserControl x:Class="SilverlightApp.Page"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     xmlns:esri="http://schemas.esri.com/arcgis/client/2009">    
<Grid x:Name="LayoutRoot" Background="White">          
      <esri:Map x:Name="MyMap" Extent="-120, 20, -100, 40" >           
 <esri:Map.Layers>           
     <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer"                     Url="http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer" />          
  </esri:Map.Layers>       
 </esri:Map>            
</Grid>
</UserControl>

I'm using an ACER 1420P: http://www.microsoftpdc.com/tablet
The WPF version is 4

As I wrote before, the only thing I've changed in my project was the assebmlies of the mapcontrol from version 2.0 to 2.1 and thats when the hang start occuring.

BTW, I tried to run the code in debug and breaked when the hang occured; I've found that the code is calling a sleep method, but could not understand where it originated from.

SomeGISGuy

Could you share the simple code you have? I'd like to see if I can reproduce it.
Also what hardware and type of touch screen are you using? What version of WPF? (.NET 3.5 or 4.0?)

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