nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

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 ?

Vind meer berichten getagd met

Runtime SDK for WPF

Accepted answers

All comments

DenisO_Connor

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

AnttiKajanus1

I tested it with 3.0

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 ?

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

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.

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.

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

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

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

AnttiKajanus1

What layer type you are moving?

Doe mee aan het gesprek

Aangemelde leden kunnen berichten plaatsen, updates volgen en meer. Nieuw hier? Registreer een gratis account.

Snelle Links

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.