Layer not visible after using the MoveLayer method of map

[martindevos]

After using the MoveLayer method on a map, the moved layer is not displayed anymore.  And there is no Refresh method.
You can make it reappear by zooming or panning or toggling the visibility of it.  Is there no cleaner solution to this problem ?

[AnttiKajanus1]

What layer type you are moving?

[MichaelBranscomb]

Hi,

Following on from Antti's question - please can you post your XAML/code which shows how the layer is defined/added and how it is being moved?

Cheers

Mike

[martindevos]

What layer type you are moving?

I have tried any kind of layer (ArcGISTiledMapServiceLayer, ArcGISDynamicMapServiceLayer, FeatureLayer and GraphicsLayer) and they all have the same problem

[martindevos]

Hi,

Following on from Antti's question - please can you post your XAML/code which shows how the layer is defined/added and how it is being moved?

Cheers

Mike

Here are some layers :

<esri:ArcGISTiledMapServiceLayer
ID="Orthofoto"
Url="http://gisservices.inbo.be/ArcGIS/rest/services/Orthofoto/MapServer"
InitializationFailed="Layer_InitializationFailed"
Visible="True"
/>

<esri:ArcGISDynamicMapServiceLayer
ID="Overview"
Url="http://gisservices.inbo.be/ArcGIS/rest/services/Viewer_overview/MapServer"
InitializationFailed="Layer_InitializationFailed"
Visible="True"
/>


And here is the code of the behavior to move them :

protected override void Invoke(object parameter)
{
if (!string.IsNullOrEmpty(this.LayerID))
{
  Map map = base.Target;
  Layer layer = map.Layers[this.LayerID];
  if (layer != null)
  {
   //visibility of layer is a hack because the moved layer isn't displayed anymore
   bool visible = layer.Visible;
   //layer.Visible = false;

   int index = map.Layers.IndexOf(layer);
   if (Direction == MoveLayerDirection.Up && index > 0)
   {   
    map.MoveLayer(index, index - 1);
   }
   else if (Direction == MoveLayerDirection.Down && index < map.Layers.Count - 1)
   {
    map.MoveLayer(index, index + 1);
   }
    
   layer.Visible = visible;
  }
}
}

If I don't use the invisible/visible trick then the moved layer is not visible anymore until you zoom or pan the map or toggle the visibilty off and on

Kind regards,
Martin

[AnttiKajanus1]

Hi,

You can call .Refresh() on layers to update (Tiled, Dynamic, Feature layers atleast) like this:

  <Grid>
        <Grid>
            <esri:Map x:Name="map">
                <esri:ArcGISTiledMapServiceLayer ID="TileLayer" 
                      Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"/>
                <esri:ArcGISDynamicMapServiceLayer ID="DynamicLayer"
                 Url="http://maverick.arcgis.com/ArcGIS/rest/services/World_WGS84/MapServer" VisibleLayers="1,2" />           
            </esri:Map>
        </Grid>
        <Button Click="Button_Click" Height="20" Width="40" HorizontalAlignment="Left">Move</Button>
    </Grid>

 private void Button_Click(object sender, RoutedEventArgs e)
        {
            var layer = this.map.Layers[0];


            var index = map.Layers.IndexOf(layer);


            map.MoveLayer(index, index + 1);


            if (layer is ArcGISTiledMapServiceLayer)
            {
                (layer as ArcGISTiledMapServiceLayer).Refresh();
                
            }
            else if (layer is ArcGISDynamicMapServiceLayer)
            {
                (layer as ArcGISDynamicMapServiceLayer).Refresh();
            }
        }

The code is ugly, but you get the point.

[AnttiKajanus1]

�?sh,

I tested this with

 <Grid>
        <Grid>
            <esri:Map x:Name="map">
                  <esri:ArcGISTiledMapServiceLayer ID="PhysicalTiledLayer" 
                      Url="http://gisservices.inbo.be/ArcGIS/rest/services/Orthofoto/MapServer"/>  
                <esri:ArcGISDynamicMapServiceLayer ID="MyLayer"
                 Url="http://gisservices.inbo.be/ArcGIS/rest/services/Viewer_overview/MapServer" VisibleLayers="1,2" />
            </esri:Map>
        </Grid>
        <Button Click="Button_Click" Height="20" Width="40" HorizontalAlignment="Left">Move</Button>
    </Grid>

 private void Button_Click(object sender, RoutedEventArgs e)
        {
            var layer = this.map.Layers[0];


            var index = map.Layers.IndexOf(layer);


            map.MoveLayer(index, index + 1);


            //if (layer is ArcGISTiledMapServiceLayer)
            //{
            //    (layer as ArcGISTiledMapServiceLayer).Refresh();


            //}
            //else if (layer is ArcGISDynamicMapServiceLayer)
            //{
            //    (layer as ArcGISDynamicMapServiceLayer).Refresh();
            //}
        }

And moving works fine so no need for extra refresh here.

[MichaelBranscomb]

Hi,

Likewise - I just tested with your layers and cannot reproduce the problem you're experiencing with MoveLayer.

 
        private void MovetopLayerDown_Click(object sender, RoutedEventArgs e)
        {
            _map.MoveLayer(0, 1);
        }

    <Grid>  
        <esri:Map x:Name="_map" UseAcceleratedDisplay="False">
            <esri:ArcGISTiledMapServiceLayer 
                ID="Orthofoto" 
                Url="http://gisservices.inbo.be/ArcGIS/rest/services/Orthofoto/MapServer"
                Visible="True"
                />
            <esri:ArcGISDynamicMapServiceLayer 
                ID="Overview" 
                Url="http://gisservices.inbo.be/ArcGIS/rest/services/Viewer_overview/MapServer"
                Visible="True"
                />
        </esri:Map>
        <StackPanel>
            <Button Content="Move top layer down" Name="MovetopLayerDown" Click="MovetopLayerDown_Click" HorizontalAlignment="Left"  VerticalAlignment="Top" Width="auto" Height="auto"/>            
        </StackPanel>
    </Grid>

Cheers

Mike

[martindevos]

Hi,

Likewise - I just tested with your layers and cannot reproduce the problem you're experiencing with MoveLayer.

 
        private void MovetopLayerDown_Click(object sender, RoutedEventArgs e)
        {
            _map.MoveLayer(0, 1);
        }

    <Grid>  
        <esri:Map x:Name="_map" UseAcceleratedDisplay="False">
            <esri:ArcGISTiledMapServiceLayer 
                ID="Orthofoto" 
                Url="http://gisservices.inbo.be/ArcGIS/rest/services/Orthofoto/MapServer"
                Visible="True"
                />
            <esri:ArcGISDynamicMapServiceLayer 
                ID="Overview" 
                Url="http://gisservices.inbo.be/ArcGIS/rest/services/Viewer_overview/MapServer"
                Visible="True"
                />
        </esri:Map>
        <StackPanel>
            <Button Content="Move top layer down" Name="MovetopLayerDown" Click="MovetopLayerDown_Click" HorizontalAlignment="Left"  VerticalAlignment="Top" Width="auto" Height="auto"/>            
        </StackPanel>
    </Grid>

Cheers

Mike

Are you also using API for WPF v 2.4 ?

[AnttiKajanus1]

I tested it with 3.0