topic Re: Featurelayer problem in V2 Beta version. in ArcGIS API for Silverlight Questions

Featurelayer problem in V2 Beta version.

DeminHu — Thu, 27 May 2010 21:05:42 GMT

Hi,

I   feel a problem with FeatureLayer in V2 Beta, but I am not sure if ESRI designs FeatureLayer in V2 just like this way or not.

in V1.2, I used to do the following in .xmal file, then in the code behind, I set URL dynamically. Everything was fine.

<esri:FeatureLayer ID="FLayer" >
                        <esri:FeatureLayer.OutFields>
                            <sys:String>*</sys:String>
                        </esri:FeatureLayer.OutFields>
          esri:FeatureLayer>

But now, with V2.0 beta version, if I didn't set a default URL in the .xmal file, it would not successfullu compile, and always got the error. If i set a URL in the .xaml file, there would no problem . But if I set a URL in .xaml file, then the user clicked a button , then reset the URL for the featurelayer in the code, then you didn't see the change displayed on the map, click again, the change showed on the map. So it need click twice. Finally, I had to use GraphicsLayer instead of FeatureLayer for my purpose. The GraphicLayer seems fine.

Is there any body has such experiences with FeatureLayer in V2 beta?

Thanks.

Re: Featurelayer problem in V2 Beta version.

DominiqueBroux — Tue, 01 Jun 2010 15:43:55 GMT

I have not reproduced the compile error when a feature layer has no URL.

What is exactly the error you get?

Re: Featurelayer problem in V2 Beta version.

DeminHu — Tue, 01 Jun 2010 20:37:01 GMT

Hi,

Thanks for help.

After read your reply, I recreated a new peoject with standard template, I added a feautelayer as the following:
<esri:FeatureLayer ID="FLayer" > </esri:FeatureLayer>

Now, I could compile successfully, but when I tried to run, the map could not be dispalyed, IE browser show: Error on page. I did the same on my working app which created with show case template, it was the same.

As soon as I removed or set a default URL for Featurelayer in .xaml , everything was OK.

I forgot what exactly error meesage showed before, since it was a few week ago. it seems something like: the tag already declared in app.xaml. But as I tested now, as long as I set a default URL in .xaml, it was Ok, no error.

I don't know what is wrong? now, I am using Graphicslayer instead for my purpose, but if I can fix the problem , use the featurelayer, it will help me a lot.

Thanks again.

Re: Featurelayer problem in V2 Beta version.

DominiqueBroux — Wed, 02 Jun 2010 11:50:27 GMT

Hook up to the 'InitializationFailed' event (even if you are doing nothing in 'FeatureLayer_InitializationFailed').
This will prevent the system to throw an exception if the initialization of the layer fails.

 <esri:FeatureLayer ID="ID=FLayer" InitializationFailed="FeatureLayer_InitializationFailed"/>

Re: Featurelayer problem in V2 Beta version.

DeminHu — Thu, 03 Jun 2010 12:13:12 GMT

Thanks for the suggestion !!