Latest Contributions by DanDong

Hi everyone, I want to use identify task on one of my map service which include shape files and related table. I tracked some thread in the forum to write codes performing RelationshipQuery. But I run into the difficulty in understand the results and how to display them in a datagrid. Below is my codes. There is one item in the RelatedRecordsGroup and it has 111 keys. I use messagebox to see the key and value(in red words at the bottom) and they are correct. But I don't know why the data cannot be bind to the datagrid. I got results like this [ATTACH]7458[/ATTACH] I really appreciate some thoughts or corrections on my codes. Thanks a lot!! QueryTask queryRelate = new QueryTask(shapfile.url);   //shapefile url is the layer I want to query queryRelate.ExecuteRelationshipQueryCompleted += queryRelate_ExecuteRelationshipQueryCompleted; queryRelate.DisableClientCaching = true; RelationshipParameter relationParameter = new RelationshipParameter(); relationParameter.ObjectIds = new int[] { objectid };   //objectid is received from the identify task on the shape file relationParameter.OutFields = new string[] { "*" };   //return all the fields in the related table relationParameter.RelationshipId = 0;      //the related table's ID is 0 queryRelate.ExecuteRelationshipQueryAsync(relationParameter,queryRelate); private void queryRelate_ExecuteRelationshipQueryCompleted(object sender, RelationshipEventArgs e)         {             RelationshipResult pr = e.Result;             int voteCount = 0;             foreach (var item in pr.RelatedRecordsGroup)             {                 voteCount = item.Value.Count();                 MessageBox.Show(Convert.ToString(voteCount));    //message box says "1"             }             if (count > 0)             {               var idDataGrid = new DataGrid   //generate a datagrid                 {                     Height = (count == 1 ? 70 : 125), //if there is only one graphic in the layer, height = 70, otherwise, height = 125                     AutoGenerateColumns = false,                     IsReadOnly = false,                     HorizontalScrollBarVisibility = ScrollBarVisibility.Auto,                     VerticalScrollBarVisibility = ScrollBarVisibility.Visible,                     HeadersVisibility = DataGridHeadersVisibility.Column,                     Background = new SolidColorBrush(Colors.White),                     RowStyle = (Style)LayoutRoot.Resources["MyCustomRow"],                     CanUserSortColumns = true,                     //ClipboardCopyMode= DataGridClipboardCopyMode.ExcludeHeader                                            };                 idDataGrid.ItemsSource = pr.RelatedRecordsGroup.Values;                 //Binding resultFeaturesBinding = new Binding("LastResult.Features");                 //resultFeaturesBinding.Source = pr.RelatedRecordsGroup.Values.ElementAt(0).ElementAt(0).Attributes;                 //querytaskPage.QueryDetailsDataGrid.SetBinding(DataGrid.ItemsSourceProperty, resultFeaturesBinding);                 //idDataGrid.SetBinding(DataGrid.ItemsSourceProperty, resultFeaturesBinding);                 idDataGrid.Columns.Clear();                 foreach (var item in pr.RelatedRecordsGroup.Values.ElementAt(0).ElementAt(0).Attributes)                 {                     DataGridTextColumn dataGridTextColumn = new DataGridTextColumn();                     Binding binder = new Binding();                     binder.Path = new PropertyPath(item.Key);                     dataGridTextColumn.Header = item.Key;                     binder.Mode = BindingMode.OneWay;                     dataGridTextColumn.Binding = binder;                     dataGridTextColumn.IsReadOnly = false;                     idDataGrid.Columns.Add(dataGridTextColumn);                 }                 MessageBox.Show(pr.RelatedRecordsGroup.Values.ElementAt(0).ElementAt(0).Attributes.ElementAt(0).Key);     //message box says "OBJECTID"                 MessageBox.Show(pr.RelatedRecordsGroup.Values.ElementAt(0).ElementAt(0).Attributes.ElementAt(0).Value.ToString());     //message box says "66901" ... View more

Hi guys, I am using mouse_move event to show the coordinates of the position. Just like this sample: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#MouseCoords But the projection of the maps in the map service is Transverse_Mercator and I want to display the coordinates in lat/long. I know geometry service supports projection task and I tied this method in my codes. But since we all move mouse very quickly and frequently and every move needs projection, this method really slows down the response time... I really would like to know whether there is a api or method to do this without projection every mousemove point nor kill the performance. Any thoughts or clues? Thank you!! Below are my codes: private void MyMap_MouseMove(object sender, System.Windows.Input.MouseEventArgs args)         {             if (MyMap.Extent != null)             {                 System.Windows.Point screenPoint = args.GetPosition(MyMap);                 ESRI.ArcGIS.Client.Geometry.MapPoint mapPoint = MyMap.ScreenToMap(screenPoint);                 //MapCoordsTextBlock.Text = string.Format("Map Coords: X = {0}, Y = {1}",                     //Math.Round(mapPoint.X, 4), Math.Round(mapPoint.Y, 4));                 //MapPoint inputMapPoint = new MapPoint(x, y, new SpatialReference(4326));                 //use geometryservice's project utility                 //GeometryService geometryService = new GeometryService("http://rmms-dev.atlas.illinois.edu/ArcGIS/rest/services/Geometry/GeometryServer");                 //geometryService.ProjectCompleted += MouseCoordinate_geometryService_ProjectCompleted;                 //geometryService.Failed += GeometryService_Failed;                 //geometryService.ProjectAsync(new List<Graphic>() { new Graphic() { Geometry = mapPoint } }, new SpatialReference(4326), mapPoint);             }         } void MouseCoordinate_geometryService_ProjectCompleted(object sender, GraphicsEventArgs e)         {             Graphic resultGraphic = e.Results[0];             MapPoint resultMapPoint = resultGraphic.Geometry as MapPoint;             MapCoordsTextBlock.Text = string.Format("Map Coords: X = {0}, Y = {1}",                     Math.Round(resultMapPoint.X, 4), Math.Round(resultMapPoint.Y, 4));         } ... View more

Hi guys, I use draw class in my application to draw polygons. Is there a way to display the length automatically when you are drawing? Just like what it is in the measure action, a segment length and a total length are showing as you move the mouse. I know geometry service can be used to calculate the length, but that must happen after you finish drawing. Any ideas or thoughts? Thank you 🙂 ... View more

Hi everyone, I attach a screenshot to describe my question [ATTACH]7358[/ATTACH]. I am keen to know how to implement such things in silverlight. Any thoughts or ideas? Thank you! In the picture you can see "Resource found" (with a underline) within "Resource within Buffer" column,  which acts as a button. When you click on the words, something will happen on the map. "Click to see the statement" within "Notes" column acts as a hyperlink to open another pdf file. And I want to ask another question (may sounds a little stupid ...) The headers of the columns are long and I don't know how to arrange them in two lines or make them auto wrap. It seems there is no property for header to wrap. My design for the datagird is: <slData:DataGrid x:Name="WirtReportDataGrid" Width="Auto" AutoGenerateColumns="False" HeadersVisibility="Column" Background="White"                              IsReadOnly="False" Grid.Row="1"                              CanUserSortColumns="True">             <slData:DataGrid.Columns>                               <slData:DataGridTextColumn CanUserSort="True"  Header="Critical Resource" Binding="{Binding Key}"/>                 <slData:DataGridTextColumn CanUserSort="False" Header="Resource in Vicinity of Project Polygon"  Binding="{Binding Value.Prop1}"/>                 <slData:DataGridTextColumn CanUserSort="False" Header="Resource within Buffer" Binding="{Binding Value.Prop2}" />                 <slData:DataGridTextColumn CanUserSort="False" Header="Notes" Binding="{Binding Value.Prop3}"/>             </slData:DataGrid.Columns>         </slData:DataGrid> ... View more