示例：创建、检索、更新和删除电子邮件附件
发布日期： 2017年1月
适用于： Dynamics 365 (online),Dynamics 365 (on-premises),Dynamics CRM 2016,Dynamics CRM Online
此示例代码适用于 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\BusinessDataModel\Activities\CRUDEmailAttachments.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。
演示
此示例演示如何使用以下方法创建、检索、更新和删除电子邮件附件：
示例
using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Text;
// These namespaces are found in the Microsoft.Xrm.Sdk.dll assembly
// found in the SDK\bin folder.
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Discovery;
using Microsoft.Xrm.Sdk.Messages;
using Microsoft.Xrm.Sdk.Client;
// This namespace is found in Microsoft.Crm.Sdk.Proxy.dll assembly
// found in the SDK\bin folder.
using Microsoft.Crm.Sdk.Messages;
namespace Microsoft.Crm.Sdk.Samples
{
public class CRUDEmailAttachments
{
#region Class Level Members
/// <summary>
/// Stores the organization service proxy.
/// </summary>
private OrganizationServiceProxy _serviceProxy;
// Define the IDs needed for this sample.
private Guid _emailId;
private Guid[] _emailAttachmentId = new Guid[3];
#endregion Class Level Members
#region How To Sample Code
/// <summary>
/// Create, Retrieve, Update and Delete an e-mail attachment.
/// <param name="serverConfig">Contains server connection information.</param>
/// <param name="promptforDelete">When True, the user will be prompted to delete all
/// created entities.</param>
/// </summary>
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();
CreateRequiredRecords();
// Create three e-mail attachments
for (int i = 0; i < 3; i++)
{
ActivityMimeAttachment _sampleAttachment = new ActivityMimeAttachment
{
ObjectId = new EntityReference(Email.EntityLogicalName, _emailId),
ObjectTypeCode = Email.EntityLogicalName,
Subject = String.Format("Sample Attachment {0}", i),
Body = System.Convert.ToBase64String(
new ASCIIEncoding().GetBytes("Example Attachment")),
FileName = String.Format("ExampleAttachment{0}.txt", i)
};
_emailAttachmentId[i] = _serviceProxy.Create(_sampleAttachment);
}
Console.WriteLine("Created three e-mail attachments for the e-mail activity.");
// Retrieve an attachment including its id, subject, filename and body.
ActivityMimeAttachment _singleAttachment =
(ActivityMimeAttachment)_serviceProxy.Retrieve(
ActivityMimeAttachment.EntityLogicalName,
_emailAttachmentId[0],
new ColumnSet("activitymimeattachmentid",
"subject",
"filename",
"body"));
Console.WriteLine("Retrieved an email attachment, {0}.", _singleAttachment.FileName);
// Update attachment
_singleAttachment.FileName = "ExampleAttachmentUpdated.txt";
_serviceProxy.Update(_singleAttachment);
Console.WriteLine("Updated the retrieved e-mail attachment to {0}.", _singleAttachment.FileName);
// Retrieve all attachments associated with the email activity.
QueryExpression _attachmentQuery = new QueryExpression
{
EntityName = ActivityMimeAttachment.EntityLogicalName,
ColumnSet = new ColumnSet("activitymimeattachmentid"),
Criteria = new FilterExpression
{
Conditions =
{
new ConditionExpression
{
AttributeName = "objectid",
Operator = ConditionOperator.Equal,
Values = {_emailId}
},
new ConditionExpression
{
AttributeName = "objecttypecode",
Operator = ConditionOperator.Equal,
Values = {Email.EntityLogicalName}
}
}
}
};
EntityCollection results = _serviceProxy.RetrieveMultiple(
_attachmentQuery);
Console.WriteLine("Retrieved all the e-mail attachments.");
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>
/// This method creates any entity records that this sample requires.
/// Creates the email activity.
/// </summary>
public void CreateRequiredRecords()
{
// Create Email Activity
Email email = new Email
{
Subject = "This is an example email",
ActivityId = Guid.NewGuid()
};
_emailId = _serviceProxy.Create(email);
Console.WriteLine("An e-mail activity is created.");
}
/// <summary>
/// Deletes the custom entity record that was created for this sample.
/// <param name="prompt">Indicates whether to prompt the user
/// to delete the entity created in this sample.</param>
/// </summary>
public void DeleteRequiredRecords(bool prompt)
{
bool deleteRecords = true;
if (prompt)
{
Console.WriteLine("\nDo you want these entity records deleted? (y/n)");
String answer = Console.ReadLine();
deleteRecords = (answer.StartsWith("y") || answer.StartsWith("Y"));
}
if (deleteRecords)
{
for (int j = 0; j < 3; j++)
{
_serviceProxy.Delete(ActivityMimeAttachment.EntityLogicalName, _emailAttachmentId[j]);
}
_serviceProxy.Delete(Email.EntityLogicalName, _emailId);
Console.WriteLine("Entity records have been deleted.");
}
}
#endregion How To Sample Code
#region Main
/// <summary>
/// Main. Runs the sample and provides error output.
/// <param name="args">Array of arguments to Main method.</param>
/// </summary>
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();
CRUDEmailAttachments app = new CRUDEmailAttachments();
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
}
}
另请参阅
IOrganizationService
活动实体的示例代码
电子邮件活动实体
示例：检索电子邮件模板的电子邮件附件
ActivityMimeAttachment（电子邮件附件）实体消息和方法
Microsoft Dynamics 365
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