using System;
    using Microsoft.Xrm.Sdk;
    using Microsoft.Crm.Sdk.Messages;
    using Microsoft.Xrm.Sdk.Query;

    /// <summary>
    /// 电子邮件
    /// </summary>
    public class EmailHelper
    {
        public static readonly string entityName = "email";
        public Guid emailId = Guid.Empty;
        public IOrganizationService service;

        /// <summary>
        /// 创建电子邮件
        /// </summary>
        public void Create()
        {
            Entity en = new Entity();
            en["subject"] = "电子邮件测试";
            en["activityId"] = Guid.NewGuid();
            emailId = service.Create(en);
        }

        /// <summary>
        /// 异步发送电子邮件
        /// </summary>
        /// <param name="query">查询的条件</param>
        public void BackgroundSendEmail(QueryBase query)
        {
            BackgroundSendEmailRequest request = new BackgroundSendEmailRequest();
            request.Query = query;
            BackgroundSendEmailResponse response = (BackgroundSendEmailResponse)service.Execute(request);
            EntityCollection entityCollection = response.EntityCollection;
            bool[] hasAttachments = response.HasAttachments;
        }

        /// <summary>
        /// 检查是否应该将传入电子邮件提升到 Microsoft Dynamics CRM 系统
        /// </summary>
        /// <param name="messageId">消息id</param>
        /// <param name="subject">主题</param>
        public void CheckPromoteEmail(string messageId,string subject)
        {
            CheckPromoteEmailRequest request = new CheckPromoteEmailRequest();
            request.MessageId = messageId;
            request.Subject = subject;
            CheckIncomingEmailResponse response = (CheckIncomingEmailResponse)service.Execute(request);
            int reasonCode = response.ReasonCode;
            bool shouldDeliver = response.ShouldDeliver;
        }

        /// <summary>
        /// 发送批量电子邮件
        /// </summary>
        /// <param name="query">查询的条件</param>
        /// <param name="templateId">模版id</param>
        public void SendBulkMail(QueryBase query,Guid templateId)
        {
            WhoAmIRequest emailSenderRequest = new WhoAmIRequest();
            WhoAmIResponse emailSenderResponse = service.Execute(emailSenderRequest) as WhoAmIResponse;
            SendBulkMailRequest request = new SendBulkMailRequest();
            request.Query = query;
            request.Sender = new EntityReference() { LogicalName = "systemuser", Id = emailSenderResponse.UserId };
            request.RequestId = Guid.Empty;
            request.RegardingType = "systemuser";
            request.TemplateId = templateId;
            SendBulkMailResponse response = (SendBulkMailResponse)service.Execute(request);
        }

        /// <summary>
        /// 使用模板发送电子邮件
        /// </summary>
        /// <param name="userId">发送人，用户id</param>
        /// <param name="contractId">接收人，联系人id</param>
        /// <param name="templateId">模版id</param>
        public void SendEmailFromTemplate(Guid userId, Guid contractId, Guid templateId)
        {
            Entity fromEn = new Entity() { LogicalName = "systemuser",Id = userId };
            Entity toEn = new Entity() { LogicalName = "contract", Id = contractId };
            Entity emailEn = new Entity() { LogicalName = entityName };
            emailEn["from"] = new Entity[] { fromEn };
            emailEn["to"] = new Entity[] { toEn };
            emailEn["subject"] = "电子邮件发送测试";
            emailEn["directioncode"] = true;
            SendEmailFromTemplateRequest request = new SendEmailFromTemplateRequest();
            request.Target = emailEn;
            request.TemplateId = templateId;
            request.RegardingId = contractId;
            request.RegardingType = "contract";
            SendEmailFromTemplateResponse response = (SendEmailFromTemplateResponse)service.Execute(request);
            Guid id = response.Id;
        }

        /// <summary>
        /// 发送电子邮件
        /// </summary>
        public void SendEmail()
        {
            SendEmailRequest request = new SendEmailRequest();
            request.EmailId = emailId;
            request.IssueSend = true;
            request.TrackingToken = "";
            SendEmailResponse response = (SendEmailResponse)service.Execute(request);
            string subject = response.Subject;
        }

        /// <summary>
        /// 获取用于对存储在 Microsoft Dynamics CRM 数据库中的用户或队列的电子邮件凭据进行加密或解密的密钥
        /// </summary>
        public void GetDecryptionKey()
        {
            GetDecryptionKeyRequest request = new GetDecryptionKeyRequest();
            GetDecryptionKeyResponse response = (GetDecryptionKeyResponse)service.Execute(request);
            string key = response.Key;
        }

        /// <summary>
        /// 删除电子邮件
        /// </summary>
        public void Delete()
        {
            service.Delete(entityName, emailId);
        }
    }

crm操作电子邮件