AttributeQueryExpression 클래스

  • 아티클

Defines a complex query to retrieve attribute metadata for entities retrieved using an EntityQueryExpression

네임스페이스: Microsoft.Xrm.Sdk.Metadata.Query
어셈블리: Microsoft.Xrm.Sdk(Microsoft.Xrm.Sdk.dll에 있음)

구문

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

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

설명

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

//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);

상속 계층

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

스레드 보안

이 형식의 공용 정적(Visual Basic에서는 Shared) 구성원은 스레드로부터 안전합니다. 인스턴스 구성원은 스레드로부터 안전하지 않을 수 있습니다.

플랫폼

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,스마트 폰,Windows Server 2003,Windows XP Professional,Windows Server 2008,Windows Server 2012,Windows 7,Windows 8,Windows 8.1

Change History

참고 항목

참조

AttributeQueryExpression 구성원
Microsoft.Xrm.Sdk.Metadata.Query 네임스페이스

기타 리소스

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

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