EntityQueryExpression-klasse

Artikel
07/17/2015

Defines a complex query to retrieve entity metadata.

Navneområde: Microsoft.Xrm.Sdk.Metadata.Query
Assembly: Microsoft.Xrm.Sdk (i Microsoft.Xrm.Sdk.dll)

Syntaks

'Deklaration
<DataContractAttribute(Name:="EntityQueryExpression", Namespace:="https://schemas.microsoft.com/xrm/2011/Metadata/Query")> _
Public NotInheritable Class EntityQueryExpression
    Inherits MetadataQueryExpression

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

Bemærkninger

The following example shows the use of an EntityQueryExpression to retrieve entity metadata.

//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);
   
   
   ...
   
   
   
protected RetrieveMetadataChangesResponse getMetadataChanges(
 EntityQueryExpression entityQueryExpression,
 String clientVersionStamp,
 DeletedMetadataFilters deletedMetadataFilter)
{
 RetrieveMetadataChangesRequest retrieveMetadataChangesRequest = new RetrieveMetadataChangesRequest()
 {
  Query = entityQueryExpression,
  ClientVersionStamp = clientVersionStamp,
  DeletedMetadataFilters = deletedMetadataFilter
 };

 return (RetrieveMetadataChangesResponse)_service.Execute(retrieveMetadataChangesRequest);

}

Nedarvningshierarki

System.Object
   Microsoft.Xrm.Sdk.Metadata.Query.MetadataQueryBase
     Microsoft.Xrm.Sdk.Metadata.Query.MetadataQueryExpression
      Microsoft.Xrm.Sdk.Metadata.Query.EntityQueryExpression

Sikkerhed i tråd

Alle offentlige statiske (Shared i Visual Basic) medlemmer af denne type er trådsikret. Alle medlemmer af forekomsten er ikke garanteret trådsikkerhed.

Platforme

Development Platforms

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

Target Platforms

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 Server 2008,Windows Server 2012,Windows 7,Windows 8,Windows 8.1

Change History

Se også

Reference

EntityQueryExpression-medlemmer
Microsoft.Xrm.Sdk.Metadata.Query-navneområde

Andre ressourcer

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

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