示例：使用 QueryByAttribute 类来进行多个检索
发布日期： 2017年1月
适用于： Dynamics 365 (online),Dynamics 365 (on-premises),Dynamics CRM 2016,Dynamics CRM Online
此示例用于 Microsoft Dynamics 365（在线或本地）。下载 Microsoft Dynamics CRM SDK 包。 它可能位于下载包的以下位置：
SampleCode\CS\GeneralProgramming\Queries\QueryByAttribute.cs
要求
有关运行此 SDK 中提供的示例代码的要求的详细信息，请参阅使用示例和帮助程序代码。
示例
该示例演示如何在 RetrieveMultiple 方法中使用 QueryByAttribute。
using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Collections.Generic;
// These namespaces are found in the Microsoft.Xrm.Sdk.dll assembly
// located in the SDK\bin folder of the SDK download.
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Client;
namespace Microsoft.Crm.Sdk.Samples
{
/// <summary>
/// Demonstrates how to do basic entity operations like create, retrieve,
/// update, and delete.</summary>
public class QueryByAttributeSample
{
#region Class Level Members
private OrganizationServiceProxy _serviceProxy;
private IOrganizationService _service;
private List<Guid> _accountIds = new List<Guid>();
#endregion Class Level Members
#region How To Sample Code
/// <summary>
/// This method first connects to the Organization service. Afterwards,
/// basic create, retrieve, update, and delete entity operations are performed.
/// </summary>
/// <param name="serverConfig">Contains server connection information.</param>
/// <param name="promptforDelete">When True, the user will be prompted to delete all
/// created entities.</param>
public void Run(ServerConnection.Configuration serverConfig, bool promptforDelete)
{
try
{
// Connect to the Organization service.
// The using statement assures that the service proxy will be properly disposed.
using (_serviceProxy = new OrganizationServiceProxy(serverConfig.OrganizationUri, serverConfig.HomeRealmUri,serverConfig.Credentials, serverConfig.DeviceCredentials))
{
// This statement is required to enable early-bound type support.
_serviceProxy.EnableProxyTypes();
_service = (IOrganizationService)_serviceProxy;
CreateRequiredRecords();
// Create query using QueryByAttribute.
QueryByAttribute querybyattribute = new QueryByAttribute("account");
querybyattribute.ColumnSet = new ColumnSet("name", "address1_city", "emailaddress1");
// Attribute to query.
querybyattribute.Attributes.AddRange("address1_city");
// Value of queried attribute to return.
querybyattribute.Values.AddRange("Redmond");
// Query passed to service proxy.
EntityCollection retrieved = _service.RetrieveMultiple(querybyattribute);
System.Console.WriteLine("Query Using QueryByAttribute");
System.Console.WriteLine("===============================");
// Iterate through returned collection.
foreach (var c in retrieved.Entities)
{
System.Console.WriteLine("Name: " + c.Attributes["name"]);
if( c.Attributes.Contains("address1_city") )
System.Console.WriteLine("Address: " + c.Attributes["address1_city"]);
if( c.Attributes.Contains("emailaddress1") )
System.Console.WriteLine("E-mail: " + c.Attributes["emailaddress1"]);
}
System.Console.WriteLine("===============================");
DeleteRequiredRecords(promptforDelete);
}
}
// Catch any service fault exceptions that Microsoft Dynamics CRM throws.
catch (FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault>)
{
// You can handle an exception here or pass it back to the calling method.
throw;
}
}
/// <summary>
/// Creates any entity records that this sample requires.
/// </summary>
public void CreateRequiredRecords()
{
// Create two accounts.
Account account = new Account
{
Name = "A. Datum Corporation",
Address1_StateOrProvince = "Colorado",
Address1_Telephone1 = "(206)555-5555",
EMailAddress1 = "info@datum.com"
};
_accountIds.Add(_service.Create(account));
account = new Account
{
Name = "Adventure Works Cycle",
Address1_StateOrProvince = "Washington",
Address1_City = "Redmond",
Address1_Telephone1 = "(206)555-5555",
EMailAddress1 = "contactus@adventureworkscycle.com"
};
_accountIds.Add(_service.Create(account));
}
/// <summary>
/// Deletes any entity records that were created for this sample.
/// <param name="prompt">Indicates whether to prompt the user
/// to delete the records created in this sample.</param>
/// </summary>
public void DeleteRequiredRecords(bool prompt)
{
bool toBeDeleted = true;
if (prompt)
{
// Ask the user if the created entities should be deleted.
Console.Write("\nDo you want these entity records deleted? (y/n) [y]: ");
String answer = Console.ReadLine();
if (answer.StartsWith("y") || answer.StartsWith("Y") ||
answer == String.Empty)
{
toBeDeleted = true;
}
else
{
toBeDeleted = false;
}
}
if (toBeDeleted)
{
// Delete all records created in this sample.
foreach (Guid accountId in _accountIds)
{
_service.Delete(Account.EntityLogicalName, accountId);
}
Console.WriteLine("Entity record(s) have been deleted.");
}
}
#endregion How To Sample Code
#region Main method
/// <summary>
/// Standard Main() method used by most SDK samples.
/// </summary>
/// <param name="args"></param>
static public void Main(string[] args)
{
try
{
// Obtain the target organization's Web address and client logon
// credentials from the user.
ServerConnection serverConnect = new ServerConnection();
ServerConnection.Configuration config = serverConnect.GetServerConfiguration();
QueryByAttributeSample app = new QueryByAttributeSample();
app.Run(config, true);
}
catch (FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault> ex)
{
Console.WriteLine("The application terminated with an error.");
Console.WriteLine("Timestamp: {0}", ex.Detail.Timestamp);
Console.WriteLine("Code: {0}", ex.Detail.ErrorCode);
Console.WriteLine("Message: {0}", ex.Detail.Message);
Console.WriteLine("Plugin Trace: {0}", ex.Detail.TraceText);
Console.WriteLine("Inner Fault: {0}",
null == ex.Detail.InnerFault ? "No Inner Fault" : "Has Inner Fault");
}
catch (System.TimeoutException ex)
{
Console.WriteLine("The application terminated with an error.");
Console.WriteLine("Message: {0}", ex.Message);
Console.WriteLine("Stack Trace: {0}", ex.StackTrace);
Console.WriteLine("Inner Fault: {0}",
null == ex.InnerException.Message ? "No Inner Fault" : ex.InnerException.Message);
}
catch (System.Exception ex)
{
Console.WriteLine("The application terminated with an error.");
Console.WriteLine(ex.Message);
// Display the details of the inner exception.
if (ex.InnerException != null)
{
Console.WriteLine(ex.InnerException.Message);
FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault> fe = ex.InnerException
as FaultException<Microsoft.Xrm.Sdk.OrganizationServiceFault>;
if (fe != null)
{
Console.WriteLine("Timestamp: {0}", fe.Detail.Timestamp);
Console.WriteLine("Code: {0}", fe.Detail.ErrorCode);
Console.WriteLine("Message: {0}", fe.Detail.Message);
Console.WriteLine("Plugin Trace: {0}", fe.Detail.TraceText);
Console.WriteLine("Inner Fault: {0}",
null == fe.Detail.InnerFault ? "No Inner Fault" : "Has Inner Fault");
}
}
}
// Additional exceptions to catch: SecurityTokenValidationException, ExpiredSecurityTokenException,
// SecurityAccessDeniedException, MessageSecurityException, and SecurityNegotiationException.
finally
{
Console.WriteLine("Press <Enter> to exit.");
Console.ReadLine();
}
}
#endregion Main method
}
}
另请参阅
IOrganizationService
QueryByAttribute
RetrieveMultiple
使用 QueryExpression 构建查询
示例：使用 QueryExpression 类来进行多个检索
使用 QueryByAttribute 类
Microsoft Dynamics 365
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