Classe QueryExpressionToFetchXmlRequest
Aplica-se a: CRM 2015 on-prem, CRM Online
Contains the data that is needed to convert a query, which is represented as a QueryExpression class, to its equivalent query, which is represented as FetchXML.
Namespace: Microsoft.Crm.Sdk.Messages
Assembly: Microsoft.Crm.Sdk.Proxy (em Microsoft.Crm.Sdk.Proxy.dll)
Sintaxe
'Declaração
<DataContractAttribute(Namespace:="https://schemas.microsoft.com/crm/2011/Contracts")> _
Public NotInheritable Class QueryExpressionToFetchXmlRequest
Inherits OrganizationRequest
[DataContractAttribute(Namespace="https://schemas.microsoft.com/crm/2011/Contracts")]
public sealed class QueryExpressionToFetchXmlRequest : OrganizationRequest
Exemplo
The following example shows how to use this message. For this sample to work correctly, you must be connected to the server to get an IOrganizationService interface. For the complete sample, see the link later in this topic.
// Build a query expression that we will turn into FetchXML.
var queryExpression = new QueryExpression()
{
Distinct = false,
EntityName = Contact.EntityLogicalName,
ColumnSet = new ColumnSet("fullname", "address1_telephone1"),
LinkEntities =
{
new LinkEntity
{
JoinOperator = JoinOperator.LeftOuter,
LinkFromAttributeName = "parentcustomerid",
LinkFromEntityName = Contact.EntityLogicalName,
LinkToAttributeName = "accountid",
LinkToEntityName = Account.EntityLogicalName,
LinkCriteria =
{
Conditions =
{
new ConditionExpression("name", ConditionOperator.Equal, "Litware, Inc.")
}
}
}
},
Criteria =
{
Filters =
{
new FilterExpression
{
FilterOperator = LogicalOperator.And,
Conditions =
{
new ConditionExpression("address1_stateorprovince", ConditionOperator.Equal, "WA"),
new ConditionExpression("address1_city", ConditionOperator.In, new String[] {"Redmond", "Bellevue" , "Kirkland", "Seattle"}),
new ConditionExpression("createdon", ConditionOperator.LastXDays, 30),
new ConditionExpression("emailaddress1", ConditionOperator.NotNull)
},
},
new FilterExpression
{
FilterOperator = LogicalOperator.Or,
Conditions =
{
new ConditionExpression("address1_telephone1", ConditionOperator.Like, "(206)%"),
new ConditionExpression("address1_telephone1", ConditionOperator.Like, "(425)%")
}
}
}
}
};
// Run the query as a query expression.
EntityCollection queryExpressionResult =
_serviceProxy.RetrieveMultiple(queryExpression);
Console.WriteLine("Output for query as QueryExpression:");
DisplayContactQueryResults(queryExpressionResult);
// Convert the query expression to FetchXML.
var conversionRequest = new QueryExpressionToFetchXmlRequest
{
Query = queryExpression
};
var conversionResponse =
(QueryExpressionToFetchXmlResponse)_serviceProxy.Execute(conversionRequest);
// Use the converted query to make a retrieve multiple request to Microsoft Dynamics CRM.
String fetchXml = conversionResponse.FetchXml;
var fetchQuery = new FetchExpression(fetchXml);
EntityCollection result = _serviceProxy.RetrieveMultiple(fetchQuery);
// Display the results.
Console.WriteLine("\nOutput for query after conversion to FetchXML:");
DisplayContactQueryResults(result);
Comentários
Message Availability
Esta mensagem funciona independentemente de o chamador estar conectado ao servidor ou offline.
Usage
Pass an instance of this class to the Execute method, which returns an instance of the QueryExpressionToFetchXmlResponse class.
Privileges and Access Rights
For a complete list of the required privileges, see QueryExpressionToFetchXml Privileges.
Notes for Callers
Use of the keyword distinct in query expressions is different from the FetchXML query language. When you map a query from Fetch to QueryExpression, you receive inconsistent results if you use the Distinct keyword in the FetchXML string.
Hierarquia de Herança
System.Object
Microsoft.Xrm.Sdk.OrganizationRequest
Microsoft.Crm.Sdk.Messages.QueryExpressionToFetchXmlRequest
Segurança do Thread
Todos os membros estáticos (Shared in Visual Basic) desse tipo são protegidos por thread. Não há nenhum garantia de que os membros de instância sejam protegidos por thread.
Plataformas
Plataformas de desenvolvimento
Windows Vista, Windows Server 2003 e
Plataformas de destino
Windows Vista,Windows XP
Change History
Consulte também
Referência
Membros de QueryExpressionToFetchXmlRequest
Namespace Microsoft.Crm.Sdk.Messages
QueryExpressionToFetchXmlResponse
Outros recursos
Create Queries to Retrieve Data
Page Large Result Sets with Query Expression and FetchXML
Build Queries with QueryExpression
FetchXML Schema
Sample: Convert Queries Between Fetch and Query Expression
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