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Can't get my data to show in Silverlight

StephenLead

Hi everyone,

I need some help with a quick ArcGIS Server question. I'm running ArcGIS Server 10 on XP, with Visual Studio 2010 and Silverlight 4.

Everything is working correctly when using the sample ESRI servers, but I'm having problems with my Silverlight app seeing my ArcGIS Server services.

A simple example using a sample ESRI server is:

<UserControl x:Class="SilverlightApplication1.MainPage"
   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">

        <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>
</UserControl>

This opens correctly and shows a world map. If I replace the URL line with Url="http://qsq-brcon15-pc/ArcGIS/rest/services/Atlas_geology/MapServer"/> the app opens and shows the "powered by ESRI" logo, but no map content is shown. If I open the Rest Services page, I can see that this is a valid tiled service (full details below). If I choose "View In ArcGIS JavaScript" the dataset displays correctly.

The same thing happens with Feature and Dynamic layers. It appears that Silverlight is installed correctly, and ArcGIS Server is working correctly, but for some reason they're not talking to each other.

Do you have any suggestions for how I can debug this?

Thanks,
Steve

ArcGIS Services Directory       Home > Atlas_geology (MapServer)   Help | API Reference     Atlas_geology (MapServer)

View In:    ArcMap   ArcGIS Explorer   ArcGIS JavaScript   Google Earth   ArcGIS.com Map   Bing Maps (terms of use)

View Footprint In:    Google Earth

Service Description:

Map Name: Layers

All Layers and Tables

Layers:

Geological types (0)

Tables:

Description:

Copyright Text:

Spatial Reference: 3857

Single Fused Map Cache: true

Tile Info:

Height: 256
Width: 256
DPI: 96
Levels of Detail: (# Levels: 5)

Level ID: 0 [Start Tile, End Tile]

Resolution: 4891.96981024998Scale: 18489297.737236

Level ID: 1 [Start Tile, End Tile]

Resolution: 2445.98490512499Scale: 9244648.868618

Level ID: 2 [Start Tile, End Tile]

Resolution: 1222.99245256249Scale: 4622324.434309

Level ID: 3 [Start Tile, End Tile]

Resolution: 611.49622628138Scale: 2311162.217155

Level ID: 4 [Start Tile, End Tile]

Resolution: 305.748113140558Scale: 1155581.108577

Format: PNG8
Compression Quality: 0
Origin:

X: -20037508.342787Y: 20037508.342787

Spatial Reference: 3857

Intial Extent:

XMin: 15508279.4278146YMin: -4706251.94265085XMax: 17290879.84873YMax: -3103956.25669766Spatial Reference: 3857 Full Extent:

XMin: 15625616.5270059YMin: -4571758.85384883XMax: 17173350.0728764YMax: -3206780.82949168Spatial Reference: 3857 Units: esriMeters

Supported Image Format Types: PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,AI,BMP

Document Info:

Title: Geology fGDB
Author: slead
Comments:
Subject:
Category:
Keywords:
Credits:

Supported Interfaces: REST SOAP

Supported Operations: Export Map Identify Find Generate KML

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Accepted answers

All comments

KatjaKrivoruchko

Do you have clientaccesspolicy.xml or crossdomain.xml file on your web server? Please see the following for more info:

1. http://msdn.microsoft.com/en-us/library/cc197955%28VS.95%29.aspx.
2. http://blogs.esri.com/Dev/blogs/silverlightwpf/archive/2009/08/24/Troubleshooting-blank-layers.aspx

JenniferNery

To debug, you can use Fiddler and investigate the web requests and responses there, so you'll know at which step it failed to load/initialize your layer.

Jennifer

StephenLead

Do you have clientaccesspolicy.xml or crossdomain.xml file on your web server?

Genius - that was the problem. Thanks very much for your help! That blog post is great.

Thanks also for the tips on Fiddler, which may prove useful in further debugging.

StephenLead

Slightly unrelated question.... In the ESRI blog post there is some C# code:

private void layer_InitializationFailed(object sender, EventArgs e)
{
Layer layer = sender as Layer;
MessageBox.Show(string.Format("Layer '{0}' is currently unavailable. Error: {1}",
     layer.ID, layer.InitializationFailure.Message));
}

What's the VB.Net equivalent? I've tried the code below but this doesn't show an error message when I deliberately use a layer which doesn't exist:

Private Sub layer_InitializationFailed(ByVal sender As Object, ByVal e As EventArgs)
        Dim layer As Layer
        sender = layer
        MessageBox.Show(layer.ID, layer.InitializationFailure.Message, MessageBoxButton.OK)
End Sub

Thanks,
Steve

JenniferNery

I think you were close but you missed the TryCast.

Private Sub layer_InitializationFailed(sender As Object, e As EventArgs)
 Dim layer As Layer = TryCast(sender, Layer)
 MessageBox.Show(String.Format("Layer '{0}' is currently unavailable. Error: {1}", layer.ID, layer.InitializationFailure.Message))
End Sub

This is a useful link for C# to VB conversion: http://www.developerfusion.com/tools/convert/csharp-to-vb/

Jennifer

StephenLead

awesome, thanks again.

VickyP

awesome, thanks again.

Hi Stevel,

Did you get any success? I am also facing the same problem, I tried with SilverLight 4 + .NET framework 4.0 and ArcGIS Server 10, SilverLight 4 + .NET framework 3.5 and ArcGIS Server 10, still I am unable to see the map inside my SilverLight app. I tried clearing the REST cache, still no success, Now I will try with Fiddler.

If you know the solution, then please share with me.

StephenLead

Hi Varun,

I ended up using the JavaScript API, which suited my client's purposes better. So I haven't used the Silverlight API at all since I posted this question.

Sorry I can't help out.

Good luck,
Steve

VickyP

Hi Varun,

I ended up using the JavaScript API, which suited my client's purposes better. So I haven't used the Silverlight API at all since I posted this question.

Sorry I can't help out.

Good luck,
Steve

Hi Steve,

Thanks for replying, I have solved the problem, you should have clientaccesspolicy.xml file in the webserver (iis) inside inetpub folder of the system in which ArcGIS SERVER is installed

DanielYague

Hi, first of all sorry about my english, it´s not very good.

I´ve just begin with silverlight and i have a problem. I copied a sample from resource center arcgis, Silverlight.
Everything is working correctly when using the sample ESRI servers, but I'm having problems with my Silverlight app seeing my ArcGIS Server services.

<UserControl x:Class="ArcGISSilverlightSDK.DynamicAndTile"
    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" >

        <esri:Map x:Name="MyMap" WrapAround="True">
            <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer"
                Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"
                InitializationFailed="Layer_InitializationFailed" />
            <esri:ArcGISDynamicMapServiceLayer ID="DynamicLayer"
                Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/RecentEarthquakesRendered/MapServer"
                InitializationFailed="Layer_InitializationFailed" />
        </esri:Map>

    </Grid>
</UserControl>

I have a layer from arcgis server with this url=http://dyc1/ArcGIS/rest/services/capa_00/MapServer
and i want to change my layer instead of the ArcGISDynamisMapServiceLayer from the sample of esri. I doný know what´s happening but i can´t view anything.

I created a similar aplication with Flex and everything it´s correct.

I use my computer like localhost

capa_00 (MapServer)
View In:   ArcMap   ArcGIS Explorer   ArcGIS JavaScript   Google Earth   ArcGIS.com Map

View Footprint In:   Google Earth

Service Description:

Map Name: Layers

All Layers and Tables

Layers:

    T00 (0)

Tables:

Description:

Copyright Text:

Spatial Reference: 3857

Single Fused Map Cache: false

Intial Extent:

    XMin: -611147.199149999
    YMin: 4716576.82812215
    XMax: -311191.35945
    YMax: 4955538.86197786
    Spatial Reference: 3857

Full Extent:

    XMin: -612856.738324999
    YMin: 4753473.211725
    XMax: -311111.056175002
    YMax: 4918645.972775
    Spatial Reference: 3857

Units: esriMeters

Supported Image Format Types: PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,AI,BMP

Document Info:

    Title:
    Author:
    Comments:
    Subject:
    Category:
    Keywords:
    Credits:

Supported Interfaces:   REST   SOAP

Supported Operations:   Export Map   Identify   Find

Can anyone help me please?
i have the same problen as Steve

regards

JenniferNery

Did you download the SDK sample? http://help.arcgis.com/en/webapi/silverlight/help/index.html#/Sample_Interactive_SDK/01660000000v000000/ Or are you copy-pasting code to a new silverlight app? Does it compile?

If your app runs just as the live sample but does not work when replaced with your service, you can refer to this blog post for trouble shooting blank layers: http://blogs.esri.com/Dev/blogs/silverlightwpf/archive/2009/08/24/Troubleshooting-blank-layers.aspx.

ClintGarrison

So, how do we fix the problem? I read the blog but it doesnt say how to fix it? Or am I missing something? I see the 2 errors /clientaccess.... and /crossdoamin.xml
but what do i do now?

Clint

JenniferNery

http://help.arcgis.com/en/webapi/silverlight/help/index.html#/FAQs/016600000009000000/

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