public SyncStateDto Search(SyncStateDto seachDto)
{
try
{
if (null == seachDto)
{
throw new KnownException("对象为空，无法查询！");
}
if (string.IsNullOrEmpty(seachDto.UserID) && string.IsNullOrEmpty(seachDto.DeviceID))
{
throw new KnownException("缺少必要信息，无法查询！");
}
using (var db = new BCEnterpriseContext())
{
var query = db.SyncStates.FirstOrDefault(obj => (obj.UserID == seachDto.UserID) &&
(obj.DeviceID == seachDto.DeviceID) &&
(obj.ActionType == seachDto.ActionType));
if (null == query)
{
throw new KnownException("未能查询到相关记录！");
}
return(query);
}
}
catch (Exception ex)
{
throw ex;
}
}
public int Add(SyncStateDto syncStateDto)
{
try
{
if (null == syncStateDto)
{
throw new KnownException("对象为空，无法添加！");
}
if (string.IsNullOrEmpty(syncStateDto.UserID) || string.IsNullOrEmpty(syncStateDto.DeviceID) || syncStateDto.ActionType < 0)
{
throw new KnownException("缺少必要信息，无法添加！");
}
using (var db = new BCEnterpriseContext())
{
syncStateDto.SyncTime = DateTime.Now;
db.SyncStates.Add(syncStateDto);
if (0 <= db.SaveChanges())
{
throw new KnownException("添加失败！");
}
return(syncStateDto.SyncStateID);
}
}
catch (Exception ex)
{
throw ex;
}
}
public bool Update(SyncStateDto updateDto)
{
try
{
if (null == updateDto)
{
throw new KnownException("对象为空，无法更新！");
}
if (string.IsNullOrEmpty(updateDto.UserID) || string.IsNullOrEmpty(updateDto.DeviceID))
{
throw new KnownException("缺少必要信息，无法更新！");
}
using (var db = new BCEnterpriseContext())
{
var query = db.SyncStates.FirstOrDefault(obj => (obj.UserID == updateDto.UserID) &&
(obj.DeviceID == updateDto.DeviceID) &&
(obj.ActionType == updateDto.ActionType));
if (null == query)
{
throw new KnownException("未能查询到相关记录，无法更新！");
}
if (query.SyncTime > updateDto.SyncTime)
{
return(false);
}
query.SyncTime = updateDto.SyncTime;
db.SyncStates.AddOrUpdate(query);
if (0 <= db.SaveChanges())
{
throw new KnownException("服务器更新失败！");
}
return(true);
}
}
catch (Exception ex)
{
throw ex;
}
}