/// <summary>
/// 更新消息状态，写入发送记录
/// </summary>
/// <param name="msg"></param>
public static void SaveMessageLog(MessageEntity msg, string sendType, string exception)
{
using (MSGEntities db = new MSGEntities())
{
MD_Message md = db.MD_Message.SingleOrDefault(o => o.ID == msg.ID);
if (md == null)
{
throw new Exception(string.Format("消息{0}不存在。", msg.ID));
}
md.IsSended = md.IsSended.Value || msg.IsSended;
MD_MessageLog log = db.MD_MessageLog.SingleOrDefault(o => o.MessageID == msg.ID && o.SendType.Equals(sendType));
if (log == null)
{
log = new MD_MessageLog();
log.ID = Guid.NewGuid();
log.MessageID = msg.ID;
log.SendType = sendType;
db.MD_MessageLog.AddObject(log);
}
log.IsSuccess = msg.IsSended;
log.Exception = exception;
log.SendTime = DateTime.Now;
db.SaveChanges();
}
}
/// <summary>
/// 获取待提醒信息
/// </summary>
/// <returns></returns>
public static List <MessageEntity> LoadAlertMessage(string sendType)
{
using (MSGEntities dbContext = new MSGEntities())
{
//该发送类型sendType下的发送记录
IQueryable <MD_MessageLog> logs = from log in dbContext.MD_MessageLog
where log.SendType.Equals(sendType)
select log;
IQueryable <MessageEntity> query = from msg in dbContext.MD_Message
join log in logs on msg.ID equals log.MessageID into logsWithNull
from log in logsWithNull.DefaultIfEmpty()
//标记未发送;已发送但无记录;有此发送类型但发送失败；
where msg.IsSended.Value == false || log == null || log.IsSuccess == false
select new MessageEntity
{
ID = msg.ID,
Receiver = msg.Receiver,
Title = msg.Title,
Content = msg.Content,
EMails = msg.Mails,
Mobiles = msg.Mobiles,
IsSended = msg.IsSended.Value,
};
//去重复
IEnumerable <MessageEntity> result = query.ToList().Distinct <MessageEntity>(new MessageDistinct());
return(result.ToList());
}
}
/// <summary>
/// 批量更新消息状态 暂未启用
/// </summary>
/// <param name="messages"></param>
public static void UpdateMessageStatus(List <MessageEntity> messages)
{
using (MSGEntities dbContext = new MSGEntities())
{
foreach (MessageEntity msg in messages)
{
var record = dbContext.MD_Message.SingleOrDefault(o => o.ID == msg.ID);
if (record != null)
{
//已发送则保持状态
record.IsSended = record.IsSended.Value || msg.IsSended;
}
}
dbContext.SaveChanges();
}
}
