Question

我正在尝试在ArcGIS for server mapserver上执行查询。运行返回少量记录的查询很好但是，如果我运行一个返回大量记录的查询，我收到此错误：

CLR无法从COM上下文0x10e1080转换为 COM上下文0x10e0f58持续60秒。拥有的线程目的地上下文/公寓很可能要么做非抽空等待或处理很长时间的运行操作抽取Windows消息。这种情况一般都是消极的性能影响甚至可能导致应用程序变为非响应或内存使用随着时间的推移不断累积。至避免这个问题，所有单线程单元（STA）线程都应该使用抽取等待原语（如CoWaitForMultipleHandles）和在长时间运行期间定期泵送消息。

这是我的C＃代码：

private void RunQuery()
        {
            _attributeQueryGraphicsLayer.Graphics.Clear();

            QueryTask queryTask = new QueryTask("http://10.1.2.103:6080/arcgis/rest/services/Calvert_City_Test/MapServer/2");
            queryTask.ExecuteCompleted += GeneralQueryTask_ExecuteCompleted;
            queryTask.Failed += GeneralQueryTask_Failed;

            var dirty = DateTime.UtcNow;
            Query query = new Query();
            query.OutFields.Add("*");
            query.ReturnGeometry = true;
            query.Where = "CIS_METR LIKE '%" + QueryParametersTextbox.Text + "%' OR COMMENTS LIKE '%" + QueryParametersTextbox.Text + "%'";
            query.OutSpatialReference = MyMap.SpatialReference;

            queryTask.ExecuteAsync(query);
        }

        // Draw results when query is complete
        private void GeneralQueryTask_ExecuteCompleted(object sender, ESRI.ArcGIS.Client.Tasks.QueryEventArgs args)
        {
            // Clear previous results
            QueryDataGrid.Visibility = Visibility.Visible;
            GraphicsLayer graphicsLayer = MyMap.Layers["QueryResults"] as GraphicsLayer;
            graphicsLayer.ClearGraphics();

            // Check for new results 
            FeatureSet featureSet = args.FeatureSet;
            if (featureSet.Features.Count > 0)
            {
                // Add results to map
                foreach (Graphic resultFeature in featureSet.Features)
                {
                    //resultFeature.Symbol = ResultsFillSymbol;
                    graphicsLayer.Graphics.Add(resultFeature);
                }
            }
            else
            {
                MessageBox.Show("No features found");
            }
        }

        // Notify when query fails
        private void GeneralQueryTask_Failed(object sender, TaskFailedEventArgs args)
        {
            MessageBox.Show("Query failed: " + args.Error);
        }
          #endregion

注意：不能选择关闭此例外。它只会导致我的应用程序冻结。

任何帮助将不胜感激。如果您需要更多信息，请告诉我。

运行查询时出现ContextSwitchDeadlock错误

0 个答案: