arcgis runtime100（十三、十四课时）

[TOC]

第十三、十四课时特征编辑

features编辑

How your features are stored affects how you make and manage edits to them in your app.

features如何保存影响你如何去在你的应用中编辑他们。

FeatureTable的关系

graph LR
FeatureTable_add_update_delete-->ArcGISFeatureTable编辑附件
FeatureTable_add_update_delete-->FeatureCollectionTable_portal不包括附件
ArcGISFeatureTable编辑附件-->GeodatabaseFeatureTable离线
ArcGISFeatureTable编辑附件-->ServiceFeatureTable在线

展示features

var table = new ServiceFeatureTable(new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/SF311/FeatureServer/0"));
            await table.LoadAsync();
            if (table.LoadStatus == Esri.ArcGISRuntime.LoadStatus.Loaded)
            {
                var flayer = new FeatureLayer(table);
                myMap.OperationalLayers.Add(flayer);
            }

添加features

private async void AddDamageFeature(MapPoint structureLocation, long type, string commit)
        {
            var attributes = new Dictionary<string, object>();
            attributes.Add("req_type", "Sidewalk and Curb Issues");
            attributes.Add("status ", 1);

            // create a new feature in the damage table, pass in the attributes and geometry
            var newFeature = table.CreateFeature(attributes, structureLocation);
            // add the new feature (this updates the local copy of the table)
            await table.AddFeatureAsync(newFeature);


            // push this update (apply edits) to the feature service
            IReadOnlyList<EditResult> editResults = await table.ApplyEditsAsync();
            // check the results for errors
            foreach (var r in editResults)
            {
                if (r.CompletedWithErrors)
                {
                    Console.WriteLine("Edit to Object '" + r.ObjectId + "' failed: " + r.Error.Message);
                }
            }
        }

识别features

double mapTolerance = tolerance * myMapView.UnitsPerPixel;

var selectionEnvelope = new Envelope(e.Location.X - mapTolerance, e.Location.Y - mapTolerance, e.Location.X + mapTolerance,
e.Location.Y + mapTolerance, myMapView.Map.SpatialReference);

var query = new QueryParameters();
query.Geometry = selectionEnvelope;
query.SpatialRelationship = SpatialRelationship.Within;

FeatureLayer fl = myMap.OperationalLayers[0] as FeatureLayer;
await fl.SelectFeaturesAsync(query, Esri.ArcGISRuntime.Mapping.SelectionMode.New);

SpatialRelationship

更新feature

var damageLayer = myMapView.Map.OperationalLayers[1] as FeatureLayer;
var selectedFeatures = await damageLayer.GetSelectedFeaturesAsync();

foreach (ArcGISFeature f in selectedFeatures)
{
    await f.LoadAsync();

    f.Attributes["req_type"] = "Tree Maintenance or Damage";

    //var location = f.Geometry as MapPoint;
    //var newLocation = new MapPoint(location.X, location.Y+5);

    //f.Geometry = newLocation;

    await table.UpdateFeatureAsync(f);
}

var editResults = await table.ApplyEditsAsync();

删除feature

var damageLayer = myMapView.Map.OperationalLayers[1] as FeatureLayer;
var selectedFeatures = await damageLayer.GetSelectedFeaturesAsync();

await table.DeleteFeaturesAsync(selectedFeatures);

var editResults = await table.ApplyEditsAsync();

添加附件

var damageLayer = myMapView.Map.OperationalLayers[1] as FeatureLayer;
var selectedFeatures = await damageLayer.GetSelectedFeaturesAsync();
// cast to ArcGISFeature to add attachments
ArcGISFeature agsFeature = (ArcGISFeature)selectedFeatures.FirstOrDefault();

await agsFeature.LoadAsync();

await agsFeature.AddAttachmentAsync("timg.jpg", "image/jpg", AuthGetFileData(@"C:\Users\tom\Desktop\timg.jpg"));

await table.UpdateFeatureAsync(agsFeature);

IReadOnlyList<EditResult> results = await table.ApplyEditsAsync();

var errs = from er in results where er.CompletedWithErrors select er;
foreach (var err in errs)
{
    Console.WriteLine(err.ToString());
}

geometries编辑

Geometry Builders

Geometry builders (or builders for short) create or change geometry. A geometry builder contains the same things a geometry contains—vertices, segments, and parts—allowing its state to be changed as needed.

工作流程

graph LR
创建builder-->修改
修改-->ToGeometry

视频资料