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

    /// <summary>
    /// 约会
    /// </summary>
    public class AppointmentHelper
    {
        public static readonly string entityName = "appointment";
        public Guid appointmentId = Guid.Empty;
        public IOrganizationService service;

        /// <summary>
        /// 创建约会
        /// </summary>
        public void Create()
        {
            WhoAmIRequest userRequest = new WhoAmIRequest();
            WhoAmIResponse userResponse = (WhoAmIResponse)service.Execute(userRequest);
            Entity activitypartyEn = new Entity(){ LogicalName = "activityparty" };
            activitypartyEn["partyId"] = new EntityReference(){ LogicalName = "systemuser",Id = userResponse.UserId };

            Entity en = new Entity() { LogicalName = entityName };
            en["subject"] = "约会测试";
            en["scheduledstart"] = DateTime.Now.AddHours(1);
            en["scheduledend"] = DateTime.Now.AddHours(2);
            en["location"] = "办公室";
            en["requiredattendees"] = new Entity[] { activitypartyEn };
            en["organizer"] = new Entity[] { activitypartyEn };
            appointmentId = service.Create(en);
        }

        /// <summary>
        /// 向现有约会中添加定期信息，以使其成为定期主约会
        /// </summary>
        /// <param name="target">目标信息</param>
        public void AddRecurrence(Entity target)
        {
            AddRecurrenceRequest request = new AddRecurrenceRequest();
            request.AppointmentId = appointmentId;
            request.Target = target;
            AddRecurrenceResponse response = (AddRecurrenceResponse)service.Execute(request);
            Guid id = response.id;
        }

        /// <summary>
        /// 将约会分派给其他用户或团队
        /// </summary>
        /// <param name="assignee">用户或团队引用</param>
        public void Assign(EntityReference assignee)
        {
            AssignRequest request = new AssignRequest();
            request.Target = new EntityReference() { LogicalName = entityName,Id = appointmentId };
            request.Assignee = assignee;
            AssignResponse response = (AssignResponse)service.Execute(request);
        }

        /// <summary>
        /// 安排或预定约会
        /// </summary>
        public void Book()
        {
            BookRequest request = new BookRequest();
            request.Target = new Entity() { LogicalName = entityName,Id = appointmentId };
            BookResponse response = (BookResponse)service.Execute(request);
            ValidationResult validationResult = response.ValidationResult;
        }

        /// <summary>
        /// 重新安排约会
        /// </summary>
        public void Reschedule()
        {
            RescheduleRequest request = new RescheduleRequest();
            request.Target = new Entity() { LogicalName = entityName, Id = appointmentId };
            RescheduleResponse response = (RescheduleResponse)service.Execute(request);
            ValidationResult validationResult = response.ValidationResult;
        }

        /// <summary>
        /// 删除约会
        /// </summary>
        public void Delete()
        {
            service.Delete(entityName, appointmentId);
        }
    }

crm操作约会实体