《ArcGIS Runtime SDK for .NET开发笔记》--在线编辑

介绍

ArcGIS可以发布具有编辑功能的Feature Service。利用Feature Service我们可以实现对数据的在线编辑。
数据制作参考：
https://server.arcgis.com/zh-cn/server/latest/get-started/windows/tutorial-set-up-feature-service-data-for-offline-use.htm

实现

1.主界面

其中OutFields控制着属性的编辑，*代表都可以写入，也可以只填写你需要编辑的属性字段。

    <Grid>        <esri:MapView x:Name="MyMapView">            <esri:Map x:Name="MyMap">                <esri:ArcGISTiledMapServiceLayer x:Name="baseMap" ServiceUri="http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer"/>                <esri:FeatureLayer ID="Incidents">                    <esri:ServiceFeatureTable ServiceUri="http://localhost:6080/arcgis/rest/services/sichuan/test1/FeatureServer/0"                                              OutFields="*"/>                    <!-- ServiceFeatureTable 中的 OutFields 控制着Attribute的编辑-->                </esri:FeatureLayer>            </esri:Map>        </esri:MapView>        <StackPanel x:Name="headPanel" Orientation="Horizontal" Margin="20,20,0,0">            <!-- 绑定编辑按钮-->            <StackPanel x:Name="headPanelMid" DataContext="{Binding ElementName=MyMapView, Path=Editor}">            </StackPanel>        </StackPanel>        <Grid x:Name="centerGrid" Margin="200"></Grid>    </Grid>

2.编辑

界面

<Grid>        <StackPanel x:Name="UserEdit" Orientation="Horizontal">            <Button Content="Edit"                        Margin="2"                        IsEnabled="False"                        x:Name="EditButton"                        Click="EditButton_Click" />            <Button Content="Attribute"                        Margin="2"                        IsEnabled="False"                        x:Name="AttributeButton"                        Click="AttributeButton_Click" />            <Button Content="Delete"                        Margin="2"                        IsEnabled="False"                        x:Name="DeleteButton"                        Click="EditButton_Click" />            <Button Content="Draw"                        Margin="2"                        x:Name="DrawButton"                        Click="DrawButton_Click" />            <Button Content="Delete Vertex"                        Margin="10,2,2,2"                        Command="{Binding DeleteVertex}" />            <Button Content="Undo"                        Margin="2"                        Command="{Binding Undo}" />            <Button Content="Redo"                        Margin="2"                        Command="{Binding Redo}" />            <Button Content="Complete"                        Margin="2"                        Command="{Binding Complete}" />            <Button Content="Cancel"                        Margin="2"                        Command="{Binding Cancel}" />        </StackPanel>    </Grid>

功能

主要是对Featureservice的图形进行编辑。
首先从Featureservice中获取table,在table中进行一系列的操作。UpdateAsync修改的feature，DeleteAsync删除，AddAsync添加。最后通过SaveResult（）将编辑结果上传到服务中。

public Edit()        {            InitializeComponent();            GlobalApp.MyMapView.MapViewTapped += MyMapView_MapViewTapped;        }        private async void MyMapView_MapViewTapped(object sender, MapViewInputEventArgs e)        {            if (GlobalApp.MyMapView.Editor.IsActive)                return;            var layer = GlobalApp.MyMapView.Map.Layers["Incidents"] as FeatureLayer;            layer.ClearSelection();            SetGeometryEditor();            string message = null;            try            {                // Performs hit test on layer to select feature.                var features = await layer.HitTestAsync(GlobalApp.MyMapView, e.Position);                if (features == null || !features.Any())                    return;                var featureID = features.FirstOrDefault();                layer.SelectFeatures(new long[] { featureID });                var feature = await layer.FeatureTable.QueryAsync(featureID);                SetGeometryEditor(feature);            }            catch (Exception ex)            {                message = ex.Message;            }            if (!string.IsNullOrWhiteSpace(message))                MessageBox.Show(message);        }        private void SetGeometryEditor(Feature feature = null)        {            EditButton.Tag = feature;            EditButton.IsEnabled = feature == null ? false : true;            DeleteButton.IsEnabled = feature == null ? false : true;            AttributeButton.IsEnabled = feature == null ? false : true;            DrawButton.IsEnabled = feature == null ? true : false;        }        private async void EditButton_Click(object sender, RoutedEventArgs e)        {            var feature = (Feature)EditButton.Tag;            var layer = GlobalApp.MyMapView.Map.Layers["Incidents"] as FeatureLayer;            var table = (ArcGISFeatureTable)layer.FeatureTable;            string which_Button = (sender as Button).Content.ToString();            // Hides feature from feature layer while its geometry is being modified.            layer.SetFeatureVisibility(layer.SelectedFeatureIDs, false);            string message = null;            try            {                // Enables geometry editing and update its geometry                 // using GeometryEngine to correct ring orientation.                if (which_Button == "Edit")                {                    var geometry = await GlobalApp.MyMapView.Editor.EditGeometryAsync(feature.Geometry);                    feature.Geometry = GeometryEngine.Simplify(geometry);                    await table.UpdateAsync(feature);                    this.SaveResult(table);                }                if (which_Button == "Delete")                {                    await table.DeleteAsync(feature);                    this.SaveResult(table);                }                   if (which_Button == "Attribute1")                {                    if (GlobalApp.mainwindow.centerGrid.Children != null)                        GlobalApp.mainwindow.centerGrid.Children.Clear();                    EditAttribute editAttribute = new EditAttribute(feature);                    editAttribute.Height = 400;                    editAttribute.Width = 400;                    GlobalApp.mainwindow.centerGrid.Children.Add(editAttribute);                }            }            catch (TaskCanceledException)            {                // Ignore TaskCanceledException - usually happens if the editor gets cancelled or restarted            }            catch (Exception ex)            {                message = ex.Message;            }            finally            {                layer.SetFeatureVisibility(layer.SelectedFeatureIDs, true);                layer.ClearSelection();                SetGeometryEditor();            }            if (!string.IsNullOrWhiteSpace(message))                MessageBox.Show(message);        }        private async void DrawButton_Click(object sender, RoutedEventArgs e)        {            var layer = GlobalApp.MyMapView.Map.Layers["Incidents"] as FeatureLayer;            var table = (ArcGISFeatureTable)layer.FeatureTable;            GeodatabaseFeature feature = table.CreateNew();            Esri.ArcGISRuntime.Geometry.Geometry addGeo = await GlobalApp.MyMapView.Editor.RequestShapeAsync(DrawShape.Polygon, null);            feature.Geometry = addGeo;            await table.AddAsync(feature.Attributes, addGeo);            this.SaveResult(table);        }        private async void SaveResult(ArcGISFeatureTable table)        {            try            {                string message = null;                if (table.HasEdits)                {                    if (table is ServiceFeatureTable)                    {                        var serviceTable = (ServiceFeatureTable)table;                        // Pushes geometry edits back to the server.                        var result = await serviceTable.ApplyEditsAsync();                        if (result.UpdateResults == null || result.UpdateResults.Count < 1)                            return;                        var updateResult = result.UpdateResults[0];                        if (updateResult.Error != null)                            message = updateResult.Error.Message;                    }                }            }catch(Exception e)            {            }        }        private void AttributeButton_Click(object sender, RoutedEventArgs e)        {            var feature = (Feature)EditButton.Tag;            if (GlobalApp.mainwindow.centerGrid.Children != null)                GlobalApp.mainwindow.centerGrid.Children.Clear();            EditAttribute editAttribute = new EditAttribute(feature);            editAttribute.Height = 400;            editAttribute.Width = 300;            GlobalApp.mainwindow.centerGrid.Children.Add(editAttribute);        }

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