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>
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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>
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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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