Classe MetadataConditionExpression

Articolo
12/03/2014

Si applica a: CRM 2015 on-prem, CRM Online

Contains a condition expression used to filter the results of the metadata query.

Spazio dei nomi: Microsoft.Xrm.Sdk.Metadata.Query
Assembly: Microsoft.Xrm.Sdk (in Microsoft.Xrm.Sdk.dll)

Sintassi

'Dichiarazione
<KnownTypeAttribute("GetKnownConditionValueTypes")> _
<DataContractAttribute(Name:="MetadataConditionExpression", Namespace:="https://schemas.microsoft.com/xrm/2011/Metadata/Query")> _
Public NotInheritable Class MetadataConditionExpression
    Implements IExtensibleDataObject

[KnownTypeAttribute("GetKnownConditionValueTypes")] 
[DataContractAttribute(Name="MetadataConditionExpression", Namespace="https://schemas.microsoft.com/xrm/2011/Metadata/Query")] 
public sealed class MetadataConditionExpression : IExtensibleDataObject

Note

The following code snippet from Sample: Query Metadata and Detect Changes shows the use of MetadataConditionExpression to set conditions for Entities and Attributes to return.


     // An array SchemaName values for non-intersect, user-owned entities that should not be returned.
     String[] excludedEntities = {
"WorkflowLog",
"Template",
"CustomerOpportunityRole",
"Import",
"UserQueryVisualization",
"UserEntityInstanceData",
"ImportLog",
"RecurrenceRule",
"QuoteClose",
"UserForm",
"SharePointDocumentLocation",
"Queue",
"DuplicateRule",
"OpportunityClose",
"Workflow",
"RecurringAppointmentMaster",
"CustomerRelationship",
"Annotation",
"SharePointSite",
"ImportData",
"ImportFile",
"OrderClose",
"Contract",
"BulkOperation",
"CampaignResponse",
"Connection",
"Report",
"CampaignActivity",
"UserEntityUISettings",
"IncidentResolution",
"GoalRollupQuery",
"MailMergeTemplate",
"Campaign",
"PostFollow",
"ImportMap",
"Goal",
"AsyncOperation",
"ProcessSession",
"UserQuery",
"ActivityPointer",
"List",
"ServiceAppointment"};

     //A filter expression to limit entities returned to non-intersect, user-owned entities not found in the list of excluded entities.
     MetadataFilterExpression EntityFilter = new MetadataFilterExpression(LogicalOperator.And);
     EntityFilter.Conditions.Add(new MetadataConditionExpression("IsIntersect", MetadataConditionOperator.Equals, false));
     EntityFilter.Conditions.Add(new MetadataConditionExpression("OwnershipType", MetadataConditionOperator.Equals, OwnershipTypes.UserOwned));
     EntityFilter.Conditions.Add(new MetadataConditionExpression("SchemaName", MetadataConditionOperator.NotIn, excludedEntities));
     MetadataConditionExpression isVisibileInMobileTrue = new MetadataConditionExpression("IsVisibleInMobile", MetadataConditionOperator.Equals, true);
     EntityFilter.Conditions.Add(isVisibileInMobileTrue);
    

    ...
    

    
 //A condition expresson to return optionset attributes
 MetadataConditionExpression[] optionsetAttributeTypes = new MetadataConditionExpression[] { 
 new MetadataConditionExpression("AttributeType", MetadataConditionOperator.Equals, AttributeTypeCode.Picklist),
 new MetadataConditionExpression("AttributeType", MetadataConditionOperator.Equals, AttributeTypeCode.State),
 new MetadataConditionExpression("AttributeType", MetadataConditionOperator.Equals, AttributeTypeCode.Status),
 new MetadataConditionExpression("AttributeType", MetadataConditionOperator.Equals, AttributeTypeCode.Boolean)
 };

 //A filter expression to apply the optionsetAttributeTypes condition expression
 MetadataFilterExpression AttributeFilter = new MetadataFilterExpression(LogicalOperator.Or);
 AttributeFilter.Conditions.AddRange(optionsetAttributeTypes);

 //A Properties expression to limit the properties to be included with attributes
 MetadataPropertiesExpression AttributeProperties = new MetadataPropertiesExpression() { AllProperties = false };
 AttributeProperties.PropertyNames.Add("OptionSet");
 AttributeProperties.PropertyNames.Add("AttributeType");
    

    ...
    

    
 //An entity query expression to combine the filter expressions and property expressions for the query.
 EntityQueryExpression entityQueryExpression = new EntityQueryExpression()
 {

  Criteria = EntityFilter,
  Properties = EntityProperties,
  AttributeQuery = new AttributeQueryExpression()
  {
   Criteria = AttributeFilter,
   Properties = AttributeProperties
  },
  LabelQuery = labelQuery

 };
 
 //Retrieve the metadata for the query without a ClientVersionStamp
 RetrieveMetadataChangesResponse initialRequest = getMetadataChanges(entityQueryExpression, null, DeletedMetadataFilters.OptionSet);

Gerarchia ereditarietà

System.Object
Microsoft.Xrm.Sdk.Metadata.Query.MetadataConditionExpression

Thread Safety

Tutti i membri statici pubblici (Shared in Visual Basic) di questo tipo sono thread-safe. Non è garantito che i membri di istanza siano thread-safe.

Piattaforme

Piattaforme di sviluppo

Windows Vista, Windows Server 2003 e

Piattaforme di destinazione

Windows 98,Windows 2000,Windows 2000 Server,Windows CE,Windows Server 2008,Windows 98 Second Edition,Pocket PC,Smartphone,Windows Server 2003,Windows XP Professional,Windows Vista,Windows XP

Change History

Vedere anche

Riferimento

Membri MetadataConditionExpression
Spazio dei nomi Microsoft.Xrm.Sdk.Metadata.Query

Altre risorse

Query and Capture Changes to Metadata
Sample: Query Metadata and Detect Changes

Condividi tramite