Classe FetchXmlToQueryExpressionRequest

Articolo
12/03/2014

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

Contains the data that is needed to convert a query in FetchXML to a QueryExpression.

Spazio dei nomi: Microsoft.Crm.Sdk.Messages
Assembly: Microsoft.Crm.Sdk.Proxy (in Microsoft.Crm.Sdk.Proxy.dll)

Sintassi

'Dichiarazione
<DataContractAttribute(Namespace:="https://schemas.microsoft.com/crm/2011/Contracts")> _
Public NotInheritable Class FetchXmlToQueryExpressionRequest
    Inherits OrganizationRequest

[DataContractAttribute(Namespace="https://schemas.microsoft.com/crm/2011/Contracts")] 
public sealed class FetchXmlToQueryExpressionRequest : OrganizationRequest

Esempio

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.

// Create a Fetch query that we will convert into a query expression.
var fetchXml =
    @"<fetch mapping='logical' version='1.0'>
     <entity name='opportunity'>
      <attribute name='name' />
      <filter>
       <condition attribute='estimatedclosedate' operator='next-x-fiscal-years' value='3' />
      </filter>
      <link-entity name='account' from='accountid' to='customerid'>
       <link-entity name='contact' from='parentcustomerid' to='accountid'>
        <attribute name='fullname' />
        <filter>
         <condition attribute='address1_city' operator='eq' value='Bellevue' />
         <condition attribute='address1_stateorprovince' operator='eq' value='WA' />
        </filter>
       </link-entity>
      </link-entity>
     </entity>
    </fetch>";

// Run the query with the FetchXML.
var fetchExpression = new FetchExpression(fetchXml);
EntityCollection fetchResult =
    _serviceProxy.RetrieveMultiple(fetchExpression);
Console.WriteLine("\nOutput for query as FetchXML:");
DisplayOpportunityQueryResults(fetchResult);

// Convert the FetchXML into a query expression.
var conversionRequest = new FetchXmlToQueryExpressionRequest
{
    FetchXml = fetchXml
};

var conversionResponse =
    (FetchXmlToQueryExpressionResponse)_serviceProxy.Execute(conversionRequest);

// Use the newly converted query expression to make a retrieve multiple
// request to Microsoft Dynamics CRM.
QueryExpression queryExpression = conversionResponse.Query;

EntityCollection result = _serviceProxy.RetrieveMultiple(queryExpression);

// Display the results.
Console.WriteLine("\nOutput for query after conversion to QueryExpression:");
DisplayOpportunityQueryResults(result);

Note

Message Availability

Questo messaggio funziona indipendentemente dal fatto che il chiamante sia connesso al server o offline.

Usage

Pass an instance of this class to the Execute method, which returns an instance of FetchXmlToQueryExpressionResponse.

Privileges and Access Rights

For a complete list of the required privileges, see FetchXmlToQueryExpression Privileges.

Notes for Callers

The use of the keyword Distinct in query expressions is different from the FetchXML query language. When mapping a query from Fetch to QueryExpression, results will not be consistent if the Distinct keyword is used in the FetchXML string.

Gerarchia ereditarietà

System.Object
Microsoft.Xrm.Sdk.OrganizationRequest
Microsoft.Crm.Sdk.Messages.FetchXmlToQueryExpressionRequest

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 Vista,Windows XP

Change History

Vedere anche

Riferimento

Membri FetchXmlToQueryExpressionRequest
Spazio dei nomi Microsoft.Crm.Sdk.Messages
FetchXmlToQueryExpressionResponse

Altre risorse

Create Queries to Retrieve Data
FetchXML Schema
Sample: Convert Queries Between Fetch and Query Expression

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