Latest Contributions by ShaningYu

I used one of ESRI's template, and loaded multiple user control components.  One component was from ESRI's sample: DriveTime, http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#DriveTimes Then, in the Main.xaml file, I use the following code to create the instance:             <unb:DriveTime x:Name="MyDriveTime" Visibility="Collapsed"                              Height="110" Width="250" Canvas.Left="18" Canvas.Top="310" /> which is the same format as that used to crate multiple other user controls. I also checked the class: DriveTime and found nothing wrong.  However, when I built it, I got the error message: 'Cannot create an instance of DriveTime'.  What's the possible reason for this bug?  If you know, please share.  Thanks. ... View more

In an application, everything works fine except for the PictureMarkerSymbol defined, which does not display on the map.  My code is below:     <Grid Name="LayoutRoot" Background="Transparent">         <Grid.Resources>             <esri:PictureMarkerSymbol x:Key="DefaultMarkerSymbol"                 OffsetX="0" OffsetY="31" Source="/UserControls/Images/i_pushpin.png" />         </Grid.Resources> I tried either  Source="/UserControls/Images/i_pushpin.png"  or  Source="UserControls/Images/i_pushpin.png"  but none of them works.  The folder /UserControls/ is under the project.  Is anything incorrect in the path? ... View more

In Flex, I used the following piece of code to zoom-in a selected feature: map.centerAt(pt); extent = new Extent(pt.x - x_offset, pt.y - y_offset, pt.x + x_offset, pt.y + y_offset); map.extent = extent.expand(1.1); where the expand method is used. In SL, my code is below:              envelope = getEnvelope(fs);  // that returns the envelope w/ XMin, YMIN, XMAX and YMAX              Map.Extent = envelope.Extent; However, I could not find its expand method in the API. If you know how to do, please help.  Thanks. ... View more

I loaded ESRI' source code for Drive Times from http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#DriveTimes. However, I got 1 error at            _geoprocessorTask.ExecuteCompleted += GeoprocessorTask_ExecuteCompleted; Error 1 The call is ambiguous between the following methods or properties: 'UnBlendedCS1_Oct1.DriveTime.GeoprocessorTask_ExecuteCompleted(object, ESRI.ArcGIS.Client.Tasks.GPExecuteCompleteEventArgs)' and 'UnBlendedCS1_Oct1.DriveTime.GeoprocessorTask_ExecuteCompleted(object, ESRI.ArcGIS.Client.Tasks.GPExecuteCompleteEventArgs)' Thanks for your review and provide your hint for the solution. ... View more

I loaded the sample code from ESRI's http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#ClosestFacility I run debugging.  After I click the 'Add Facilities', it executes Editor_EditCompleted         private void Editor_EditCompleted(object sender, Editor.EditEventArgs e)         {             Editor editor = sender as Editor;             if (e.Action == Editor.EditAction.Add)             {                 if (editor.LayerIDs.ElementAt(0) == "MyFacilitiesGraphicsLayer")                 {                     e.Edits.ElementAt(0).Graphic.Attributes.Add("FacilityNumber",                         (e.Edits.ElementAt(0).Layer as GraphicsLayer).Graphics.Count);                 }                 else if (editor.LayerIDs.ElementAt(0) == "MyIncidentsGraphicsLayer")                 {                     e.Edits.ElementAt(0).Graphic.Attributes.Add("IncidentNumber",                         (e.Edits.ElementAt(0).Layer as GraphicsLayer).Graphics.Count);                 }                 if (facilitiesGraphicsLayer.Graphics.Count > 0 && IncidentsGraphicsLayer.Graphics.Count > 0)                     SolveButton.IsEnabled = true;             }         } However, I always get the Cancel value for the e.Action.  Anyone knows that is wrong and how to fix it?  Thanks. ... View more

In ESRI's provided source code, http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#OverviewMap, the overview map's extent does not bind with the mainpage map, but use the initially set extent.  How can it be dynamically bind with the mainpage map? In the thread: http://forums.arcgis.com/threads/10033-Overview-map-does-not-show-contents-until-after-view-extent-changed?highlight=overviewmap ESRI's Jenniffer commented that she would look at it?  Has this problem be solved?  Thanks. ... View more

Scenario Desription: 1) Created MagifyingGlass.xaml and loaded ESRI's sample code in http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#MagnifyingGlass 2) Created a button on the toolbar for the MagnifyingGlass tool    if (btn == btnMagnifyingGlass) {          // if it is collapsed          _Parent.ShowMagnifyingGlass();    }    and         public void ShowMagnifyingGlass()  {             MyMagnifyingGlass.Visibility = Visibility.Visible;         } Questions: 1) How to check whether the tool is collapsed or not (can't do like that: MyMagnifyingGlass.Visibility.Collapsed )? 2) How to set the tool Collapsed or Visible? Thanks. ... View more

I loaded ESRI's MagnifyingGlass component.  However, the Magnifying Glass tool 1) Does not bind the street map but display an image map (see the image attached) 2) There is no magnifying function at all The codes are listed below:         <esri:MagnifyingGlass x:Name="MyMagnifyingGlass" Visibility="Visible"                                          HorizontalAlignment="Left" VerticalAlignment="Top"                                          Map="{Binding ElementName=_Map}" >             <esri:MagnifyingGlass.Layer>                 <esri:ArcGISTiledMapServiceLayer ID="StreetMapLayer"                     Url="http://services.arcgisonline.com/ArcGIS/rest/services/NPS_Physical_World_2D/MapServer"/>             </esri:MagnifyingGlass.Layer>         </esri:MagnifyingGlass> where the _Map is defined in its .cs file:         private MainPage _Parent;         private Map _Map;         public void SetMap(Map TheMap)     {             _Map = TheMap;         }         public void SetParent(MainPage TheParent)     {             _Parent = TheParent;         } Please help if you know why.  Thanks. ... View more