protected virtual void OnSelecting(CrmMetadataDataSourceSelectingEventArgs args) { EventHandler <CrmMetadataDataSourceSelectingEventArgs> handler = base.Events[EventSelecting] as EventHandler <CrmMetadataDataSourceSelectingEventArgs>; if (handler != null) { handler(this, args); } }
protected override IEnumerable ExecuteSelect(DataSourceSelectArguments arguments) { Tracing.FrameworkInformation("CrmMetadataDataSourceView", "ExecuteSelect", "Begin"); if (CanSort) { arguments.AddSupportedCapabilities(DataSourceCapabilities.Sort); } if (CanPage) { arguments.AddSupportedCapabilities(DataSourceCapabilities.Page); } if (CanRetrieveTotalRowCount) { arguments.AddSupportedCapabilities(DataSourceCapabilities.RetrieveTotalRowCount); } // merge SelectParameters IOrderedDictionary parameters = SelectParameters.GetValues(Context, Owner); string sortExpression = GetNonNullOrEmpty( arguments.SortExpression, parameters[_sortExpressionParameterName] as string, SortExpression); string entityName = GetNonNullOrEmpty( parameters[_entityNameParameterName] as string, EntityName); string attributeName = GetNonNullOrEmpty( parameters[_attributeNameParameterName] as string, AttributeName); var metadataFlags = MetadataFlags; if (parameters.Contains(_metadataFlagsParameterName)) { metadataFlags = (parameters[_metadataFlagsParameterName] as string).ToEnum <EntityFilters>(); } var entityFlags = EntityFlags; if (parameters.Contains(_entityFlagsParameterName)) { entityFlags = (parameters[_entityFlagsParameterName] as string).ToEnum <EntityFilters>(); } // raise pre-event CrmMetadataDataSourceSelectingEventArgs selectingArgs = new CrmMetadataDataSourceSelectingEventArgs( Owner, arguments, entityName, attributeName, metadataFlags, entityFlags, sortExpression); OnSelecting(selectingArgs); if (selectingArgs.Cancel) { Tracing.FrameworkInformation("CrmMetadataDataSourceView", "ExecuteSelect", "Cancel"); return(null); } // merge event results arguments.RaiseUnsupportedCapabilitiesError(this); sortExpression = selectingArgs.SortExpression; entityName = selectingArgs.EntityName; attributeName = selectingArgs.AttributeName; metadataFlags = selectingArgs.MetadataFlags; entityFlags = selectingArgs.EntityFlags; if (CancelSelectOnNullParameter && string.IsNullOrEmpty(entityName) && string.IsNullOrEmpty(attributeName)) { Tracing.FrameworkInformation("CrmMetadataDataSourceView", "ExecuteSelect", "CancelSelectOnNullParameter"); return(null); } IEnumerable result = null; int rowsAffected = 0; try { if (Owner.CacheParameters.Enabled) { var cacheKey = GetCacheKey(metadataFlags, entityFlags, entityName, attributeName, sortExpression); result = ObjectCacheManager.Get(cacheKey, cache => { var metadata = ExecuteSelect(entityName, attributeName, sortExpression, entityFlags, metadataFlags, out rowsAffected); return(metadata); }, (cache, metadata) => { if (metadata != null) { var dependencies = GetCacheDependencies(metadata); cache.Insert(cacheKey, metadata, dependencies); } }); } else { result = ExecuteSelect(entityName, attributeName, sortExpression, entityFlags, metadataFlags, out rowsAffected); } } catch (System.Web.Services.Protocols.SoapException ex) { Tracing.FrameworkError("CrmMetadataDataSourceView", "ExecuteSelect", "{0}\n\n{1}", ex.Detail.InnerXml, ex); } catch (Exception e) { Tracing.FrameworkError("CrmMetadataDataSourceView", "ExecuteSelect", "Exception: {0}", e); // raise post-event with exception CrmMetadataDataSourceStatusEventArgs selectedExceptionArgs = new CrmMetadataDataSourceStatusEventArgs(0, e); OnSelected(selectedExceptionArgs); if (!selectedExceptionArgs.ExceptionHandled) { throw; } return(result); } // raise post-event CrmMetadataDataSourceStatusEventArgs selectedArgs = new CrmMetadataDataSourceStatusEventArgs(rowsAffected, null); OnSelected(selectedArgs); Tracing.FrameworkInformation("CrmMetadataDataSourceView", "ExecuteSelect", "End"); return(result); }