AttributeQueryExpression Class

 

Updated: November 29, 2016

Applies To: Dynamics 365 (online), Dynamics 365 (on-premises), Dynamics CRM 2016, Dynamics CRM Online

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

Namespace:   Microsoft.Xrm.Sdk.Metadata.Query
Assembly:  Microsoft.Xrm.Sdk (in Microsoft.Xrm.Sdk.dll)

SystemObject
  Microsoft.Xrm.Sdk.Metadata.QueryMetadataQueryBase
    Microsoft.Xrm.Sdk.Metadata.QueryMetadataQueryExpression
      Microsoft.Xrm.Sdk.Metadata.QueryAttributeQueryExpression

No code example is currently available or this language may not be supported.

NameDescription
System_CAPS_pubmethodAttributeQueryExpression

Initializes a new instance of the AttributeQueryExpression class.

NameDescription
System_CAPS_pubproperty

Gets or sets the filter criteria for the metadata query.(Inherited from MetadataQueryExpression.)

System_CAPS_pubproperty

Gets or sets the structure that contains extra data.(Inherited from MetadataQueryBase.)

System_CAPS_pubproperty

Gets or sets the properties to be returned by the query.(Inherited from MetadataQueryExpression.)

NameDescription
System_CAPS_pubmethodEquals

(Inherited from Object.)

System_CAPS_pubmethodGetHashCode

(Inherited from Object.)

System_CAPS_pubmethodGetType

(Inherited from Object.)

System_CAPS_pubmethodToString

(Inherited from Object.)

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);

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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