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WPF Toolkit 2.0 - Overview map error

JoshuaCorcoran

I have created a WPF Window. If I place the OverviewMap Control in the new window and load the application it freezes at the place where you set the Layer property. If I pull the overview map out of the new window and place it on the form with the map it works perfectly. Is this an known error and is there a work around?

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JenniferNery

It's good that you have it working now. However if hard-coded value worked, then all you need to check are the Binding statement and the Dependency Property if they are set up correctly. I still do not see why you are getting a different behavior with the sample.

JoshuaCorcoran

Sure. I just added it as attachment to this post in case other dev will need to do something similar. Kindly see attached WPF project.

Jennifer,

Thanks for the code. This code did not work for me either. When running the application I simply get an empty overview map with an uninitizled layer. I did find a work around though this is what I did. In otherwindow.xaml I created an empty Grid and named it Layoutroot. I then passed the URL to the otherwindow instead of the layer and using the XamlReader constructed the Xaml in C# with the dynamic URL and added it to the empty grid. I discovered this becuase I noticied when I hardcoded the url into your example it worked. Thanks for all your help.

V/R,

Joshua

JenniferNery

Sure. I just added it as attachment to this post in case other dev will need to do something similar. Kindly see attached WPF project.

OverviewMapTest.zip

JoshuaCorcoran

Can you try to run Fiddler with your application to monitor web requests?

I really could not replicate the issue you are facing with OverviewMap. I modified a copy of this sample in WPF http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#OverviewMap.
. Placing OverviewMap code in another Window with the code I included in my last post.

Did you replace "OtherWindow" with your own class name?

If that still does not work for you, download Toolkit source code from CodePlex http://esrisilverlight.codeplex.com/ and debug through it.

Jennifer,

Could you send me a zip file of the project you tested it with. I can try and run the project from here and see if I get the same error. My email address is: corcoranj.ctr@jdi.socom.mil

Thanks,

Josh

JenniferNery

Can you try to run Fiddler with your application to monitor web requests?

I really could not replicate the issue you are facing with OverviewMap. I modified a copy of this sample in WPF http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#OverviewMap.
. Placing OverviewMap code in another Window with the code I included in my last post.

Did you replace "OtherWindow" with your own class name?

public static readonly DependencyProperty MapProperty = DependencyProperty.Register("Map", typeof(Map), typeof( OtherWindow), new PropertyMetadata(OnMapPropertyChanged));

public static readonly DependencyProperty LayerProperty = DependencyProperty.Register("Layer", typeof(Layer), typeof( OtherWindow), new PropertyMetadata(OnLayerPropertyChanged));

If that still does not work for you, download Toolkit source code from CodePlex http://esrisilverlight.codeplex.com/ and debug through it.

JoshuaCorcoran

Map and Layer property in your code use DependencyProperty that sets Map and Layer of the OverviewMap contro? (similar to code below)

I do not get error when I have the following code in OtherWindow.xaml.cs

public Map Map
{
 get { return (Map)GetValue(MapProperty); }
 set { SetValue(MapProperty, value); }
}
 
public static readonly DependencyProperty MapProperty = DependencyProperty.Register("Map", typeof(Map), typeof(OtherWindow), new PropertyMetadata(OnMapPropertyChanged));
  
private static void OnMapPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
 OtherWindow ow = d as OtherWindow;
 if (ow != null && e.NewValue is Map)
  ow.MyOverviewMap.Map = e.NewValue as Map;
}
  
public Layer Layer
{
 get { return (Layer)GetValue(LayerProperty); }
 set { SetValue(LayerProperty, value); }
}

public static readonly DependencyProperty LayerProperty = DependencyProperty.Register("Layer", typeof(Layer), typeof(OtherWindow), new PropertyMetadata(OnLayerPropertyChanged));
private static void OnLayerPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
 OtherWindow ow = d as OtherWindow;
 if (ow != null && e.NewValue is Layer)
  ow.MyOverviewMap.Layer = e.NewValue as Layer;
}

In MainWindow.xaml.cs

private void Window_Loaded(object sender, RoutedEventArgs e)
{
 OtherWindow ow = new OtherWindow()
 {
 Map = this.MyMap,
 Layer = new ArcGISTiledMapServiceLayer()
 {
  Url = (this.MyMap.Layers[0] as ArcGISTiledMapServiceLayer).Url
 }
};
ow.Show();

Jennifer,

I tried the code that you supplied. The application no longer freezes up completly but no overview map is diplayed. I just get a blank white window. I put a breakpoint in the application and notice that the Layer supplied is never initalized. Upon calling initalize the application freezes up again. What am I doing wrong here, this seems like such a simple task.

JoshuaCorcoran

Jennifer,

Will try that code first thing in the morning, and let you know if it works for me. Thanks.

JenniferNery

public Map Map
{
 get { return (Map)GetValue(MapProperty); }
 set { SetValue(MapProperty, value); }
}
 
public static readonly DependencyProperty MapProperty = DependencyProperty.Register("Map", typeof(Map), typeof(OtherWindow), new PropertyMetadata(OnMapPropertyChanged));
  
private static void OnMapPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
 OtherWindow ow = d as OtherWindow;
 if (ow != null && e.NewValue is Map)
  ow.MyOverviewMap.Map = e.NewValue as Map;
}
  
public Layer Layer
{
 get { return (Layer)GetValue(LayerProperty); }
 set { SetValue(LayerProperty, value); }
}

public static readonly DependencyProperty LayerProperty = DependencyProperty.Register("Layer", typeof(Layer), typeof(OtherWindow), new PropertyMetadata(OnLayerPropertyChanged));
private static void OnLayerPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
 OtherWindow ow = d as OtherWindow;
 if (ow != null && e.NewValue is Layer)
  ow.MyOverviewMap.Layer = e.NewValue as Layer;
}

In MainWindow.xaml.cs

private void Window_Loaded(object sender, RoutedEventArgs e)
{
 OtherWindow ow = new OtherWindow()
 {
 Map = this.MyMap,
 Layer = new ArcGISTiledMapServiceLayer()
 {
  Url = (this.MyMap.Layers[0] as ArcGISTiledMapServiceLayer).Url
 }
};
ow.Show();

JoshuaCorcoran

I'm not sure I know how to replicate the issue so you have two different windows, one with your map and one with OverviewMap? How does OverviewMap set its Map property?

I suspect the problem here is with
<esri:OverviewMap x:Name="MyOverviewMap"  Map="{Binding ElementName=MyMap}">
Element binding will not work if MyMap exists in a different window. For the window that will hold OverviewMap control, you may need to create a Map DependencyProperty for the OverviewMap control to use.

Please see sample code above.

JoshuaCorcoran

I have created a WPF Window. If I place the OverviewMap Control in the new window and load the application it freezes at the place where you set the Layer property. If I pull the overview map out of the new window and place it on the form with the map it works perfectly. Is this an known error and is there a work around?

I created a new WPF Application. You get the standard MainWindow.xaml. I placed a map control on this main page. I then created a new WPF Window. Right click on Project -> New Item -> Window (WPF) called it frmOverview. In the xaml of the new window I added

<esri:OverviewMap x:Name="ovmap" Margin="5"/>

In the code behind for that page I added the following:

public partial class frmOverviewMap: Window
{
   public Map Map { get; set;}
   public Layer Layer { get; set;}

   private void Window_Loaded(object sender, RoutedEventArgs e)
{
     this.ovmap.Map = this.Map;
     this.ovmap.Layer = this.Layer;
}
}

My implementation for the main form is as follows:

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    var newLayer = new ArcGISTiledMapService();
    newLayer.Url = ""<SOME URL>";
    newlayer.ID = "<SOME ID>";

    var newForm = new frmOverviewMap();
    newForm.Map = this.map;
    newForm.Layer = newLayer;
    newform.Topmost = true;
    newform.Show();
}

After the layer intalizes the whole app freezes.

JenniferNery

I'm not sure I know how to replicate the issue so you have two different windows, one with your map and one with OverviewMap? How does OverviewMap set its Map property?

I suspect the problem here is with

<esri:OverviewMap x:Name="MyOverviewMap"  Map="{Binding ElementName=MyMap}">

Element binding will not work if MyMap exists in a different window. For the window that will hold OverviewMap control, you may need to create a Map DependencyProperty for the OverviewMap control to use.

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