topic Re: Layer not visible after using the MoveLayer method of map in ArcGIS Runtime SDK for WPF (Retired) Questions

Layer not visible after using the MoveLayer method of map

martindevos — Mon, 06 Aug 2012 06:27:16 GMT

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 ?

Re: Layer not visible after using the MoveLayer method of map

AnttiKajanus1 — Mon, 06 Aug 2012 12:00:37 GMT

What layer type you are moving?

Re: Layer not visible after using the MoveLayer method of map

MichaelBranscomb — Tue, 07 Aug 2012 07:41:40 GMT

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

Re: Layer not visible after using the MoveLayer method of map

martindevos — Wed, 08 Aug 2012 08:53:07 GMT

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

Re: Layer not visible after using the MoveLayer method of map

martindevos — Wed, 08 Aug 2012 09:56:34 GMT

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

Re: Layer not visible after using the MoveLayer method of map

AnttiKajanus1 — Fri, 10 Dec 2021 21:32:39 GMT

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.

Re: Layer not visible after using the MoveLayer method of map

AnttiKajanus1 — Fri, 10 Dec 2021 21:32:42 GMT

�?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.

Re: Layer not visible after using the MoveLayer method of map

MichaelBranscomb — Fri, 10 Dec 2021 21:32:45 GMT

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

Re: Layer not visible after using the MoveLayer method of map

martindevos — Fri, 10 Dec 2021 21:32:47 GMT

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 ?

Re: Layer not visible after using the MoveLayer method of map

AnttiKajanus1 — Mon, 13 Aug 2012 07:50:43 GMT

I tested it with 3.0

Re: Layer not visible after using the MoveLayer method of map

DenisO_Connor — Fri, 16 Nov 2012 07:37:35 GMT

This happens when layers are added to the Map in code.

To fix - read the Extent pre Move and reset post Move - e.g
Dim myEnvelope As New ESRI.ArcGIS.Client.Geometry.Envelope
myEnvelope = myMap.Extent
myMap.Layers.Move(3, 2)
myMap.Extent = myEnvelope