Sample: Retrieve email attachments for an email template

आलेख
11/28/2016
Applies To: Dynamics 365 (online), Dynamics 365 (on-premises), Dynamics CRM 2016, Dynamics CRM Online
This sample code is for Microsoft Dynamics 365 (online & on-premises). Download the Microsoft Dynamics CRM SDK package. It can be found in the following location in the download package:
SampleCode\CS\BusinessDataModel\Templates\GetEmailTemplateAttachments.cs
Requirements

For more information about the requirements for running the sample code provided in this SDK, see Use the sample and helper code.
Demonstrates

This sample shows how to retrieve email attachments associated with an email template by using the IOrganizationService.RetrieveMultiple method.
Example


using System;
using System.ServiceModel;
using System.ServiceModel.Description;

// 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.Client;
using Microsoft.Xrm.Sdk.Query;
using Microsoft.Xrm.Sdk.Discovery;

// This namespace is found in Microsoft.Crm.Sdk.Proxy.dll assembly
// found in the SDK\bin folder.
using Microsoft.Crm.Sdk.Messages;
using System.Collections.Generic;


namespace Microsoft.Crm.Sdk.Samples
{

    /// <summary>
    /// Demonstrates how to retrieve email attachments associated with an email template.
    /// If you want to run this sample repeatedly, you have the option to 
    /// delete all the records created at the end of execution.
    /// </summary>
    public class GetEmailTemplateAttachments
    {
        #region Class Level Members
        /// <summary>
        /// Stores the organization service proxy.
        /// </summary>
        private OrganizationServiceProxy _serviceProxy;

        // Define the IDs needed for this sample.
        public Guid _emailTemplateId;
        public List<Guid> _templateAttachmentIds = new List<Guid>();

        #endregion Class Level Members

        #region How To Sample Code
        /// <summary>
        /// Create and configure the organization service proxy.
        /// Create an email template and several attachments.
        /// Retrieve the email attachments
        /// Optionally delete template and attachments.
        /// </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();

                    // Call the method to create any data that this sample requires.
                    CreateRequiredRecords();


                    //Create a query to retrieve attachments.
                    QueryExpression query = new QueryExpression
                    {
                        EntityName = ActivityMimeAttachment.EntityLogicalName,
                        ColumnSet = new ColumnSet("filename"),

                        //Define the conditions for each attachment.
                        Criteria =
                        {
                            FilterOperator = LogicalOperator.And,
                            Conditions =
                        {
                            //The ObjectTypeCode must be specified, or else the query
                            //defaults to "email" instead of "template".
                            new ConditionExpression
                            {
                                AttributeName = "objecttypecode",
                                Operator = ConditionOperator.Equal,
                                Values = {Template.EntityTypeCode}
                            },
                            //Specify which template we need.
                            new ConditionExpression
                            {
                                AttributeName = "objectid",
                                Operator = ConditionOperator.Equal,
                                Values = {_emailTemplateId}
                            }
                        }
                        }
                    };

                    //Write out the filename of each attachment retrieved.
                    foreach (ActivityMimeAttachment attachment in _serviceProxy.RetrieveMultiple(query).Entities)
                    {
                        Console.WriteLine("Retrieved attachment {0}", attachment.FileName);
                    }


                    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.
        /// </summary>
        public void CreateRequiredRecords()
        {
            //Define the email template to create.
            Template emailTemplate = new Template
            {
                Title = "An example email template",
                Subject = "This is an example email.",
                IsPersonal = false,
                TemplateTypeCode = "lead",

                //1033 is the code for US English - you may need to change this value
                //depending on your locale.
                LanguageCode = 1033

            };

            _emailTemplateId = _serviceProxy.Create(emailTemplate);

            for (int i = 0; i < 3; i++ )
            {
                ActivityMimeAttachment attachment = new ActivityMimeAttachment
                {
                    Subject = String.Format("Attachment {0}",i),
                    FileName = String.Format("ExampleAttachment{0}.txt", i),
                    Body = "Some Text",
                    ObjectId = new EntityReference(Template.EntityLogicalName, _emailTemplateId),
                    ObjectTypeCode = Template.EntityLogicalName
                };

                _templateAttachmentIds.Add(_serviceProxy.Create(attachment));
            }

            Console.WriteLine("An email template and {0} attachments were created.", _templateAttachmentIds.Count);

            return;
        }

        /// <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 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)
            {
                foreach(Guid attachmentId in _templateAttachmentIds)
                {
                    _serviceProxy.Delete(ActivityMimeAttachment.EntityLogicalName, attachmentId);
                }

                _serviceProxy.Delete(Template.EntityLogicalName, _emailTemplateId);

                Console.WriteLine("Entity records have been deleted.");
            }
        }

        #endregion How To Sample Code

        #region Main
        /// <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();

                GetEmailTemplateAttachments app = new GetEmailTemplateAttachments();
                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

    }
}
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Sample: Retrieve email attachments for an email template

Requirements

Demonstrates

Example

See Also

अतिरिक्त संसाधन
