.net ArcGis 更新功能 returns "Cannot call this method in this context: You must load the feature before editing."

Question

我正在尝试通过 .Net 更新要素图层的属性。但我不断收到此错误消息："Cannot call this method in this context: You must load the feature before editing." 这是我的代码：

static void Main(string[] args) {

  var featureTable = new ServiceFeatureTable(new Uri("https://services7.arcgis.com/yixziXsHssbXEWl5/ArcGIS/rest/services/grex/FeatureServer/0")) {Credential = new ArcGISTokenCredential()};

  ((TokenCredential) featureTable.Credential).Token = GetToken().access_token;
  var queryParams = new QueryParameters {WhereClause = "DeelplanId = 666"};

  // Query the feature table 
  var queryResult =  featureTable.QueryFeaturesAsync(queryParams);
  // Cast the QueryResult to a List so the results can be interrogated
  queryResult.Wait();
  var features = queryResult.Result.ToList();

  features[0].SetAttributeValue("Kosten", 3562);

  Console.ReadKey();
}

虽然我看到属性是从服务器加载的，但它在 SetAttributeValue 上失败了。有什么想法吗？谢谢！

Answer 1

必须加载功能：

var editFeature = features.First(); await (editFeature as ArcGISFeature).LoadAsync(); editFeature.SetAttributeValue("description", $"Updated from runtime at {DateTime.Now.ToShortTimeString()}");

https://geonet.esri.com/thread/195459-update-feature-returns-cannot-call-this-method-in-this-context-you-must-load-the-feature-before-editing

.net ArcGis 更新功能 returns "Cannot call this method in this context: You must load the feature before editing."

.net ArcGis update feature returns "Cannot call this method in this context: You must load the feature before editing."

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