/// <summary>
/// 投票.
/// </summary>
/// <returns></returns>
public JsonResult DoBallot(int masterID, int detailID)
{
UserBallot userBallot = new UserBallot()
{
// 投票主表ID.
BallotMasterID = masterID,
// 投票明细ID.
BallotDetailID = detailID,
// 投票时间.
BallotTime = DateTime.Now,
// 投票用户IP.
UserIp = Request.UserHostAddress,
// 投票用户 cookie.
UserCookie = GetRandomGuestCode(),
// 投票用户代码（如果有的话）
UserCode = "",
};
bool result = userBallotService.TakeUserBallot(userBallot);
if (!result)
{
// 失败.
var errorResult = new
{
Result = false,
Message = userBallotService.ResultMessage,
};
return(Json(errorResult));
}
// 成功.
var jsonResult = new
{
Result = true
};
return(Json(jsonResult));
}
/// <summary>
/// 用户投票
/// </summary>
/// <param name="userBallot"></param>
/// <returns></returns>
public bool TakeUserBallot(UserBallot userBallot)
{
// 预期结果.
bool result = false;
try
{
using (MyBallotContext context = new MyBallotContext())
{
// 先检查. 是否存在 重复提交.
var existQuery =
from data in context.UserBallots
where
// 同一个 投票主数据.
data.BallotMasterID == userBallot.BallotMasterID
// ip 一致.
&& data.UserIp == userBallot.UserIp
// cookie 一致.
&& data.UserCookie == userBallot.UserCookie
// 今天.
&& data.BallotTime >= DateTime.Today
select
data;
if (existQuery.Count() > 0)
{
// 存在 重复提交.
ResultMessage = "一天只能投票一次！";
return(false);
}
// 检查， 避免传入 不存在的 投票主表 与 投票明细.
BallotMaster master = context.BallotMasters.Find(userBallot.BallotMasterID);
if (master == null)
{
ResultMessage = "投票主数据不存在！";
return(false);
}
BallotDetail detail = context.BallotDetails.Find(userBallot.BallotDetailID);
if (detail == null)
{
ResultMessage = "投票明细数据不存在！";
return(false);
}
// 数据检查完毕.
// 投票明细的 投票数 + 1.
detail.BallotCount = detail.BallotCount + 1;
// 插入用户投票数据.
context.UserBallots.Add(userBallot);
// 物理保存.
context.SaveChanges();
}
result = true;
}
catch (System.Data.Entity.Validation.DbEntityValidationException dbErr)
{
logger.Info(userBallot);
foreach (var errItem in dbErr.EntityValidationErrors)
{
foreach (var err in errItem.ValidationErrors)
{
logger.InfoFormat("{0} : {1}", err.PropertyName, err.ErrorMessage);
}
}
logger.Error(dbErr.Message, dbErr);
result = false;
ResultMessage = dbErr.Message;
}
catch (Exception ex)
{
result = false;
ResultMessage = ex.Message;
}
return(result);
}