这是重要的代码。
TournamentTeam newTeam = new TournamentTeam();
TournamentTeams.InsertOnSubmit(newTeam);
SubmitChanges();
TournamentParticipant newSignup = new TournamentParticipant
{
CheckedIn = false,
TournamentID = tournamentId,
UserID = participant.UserID,
TeamID = newTeam.TeamId
};
TournamentParticipants.InsertOnSubmit(newSignup);
SubmitChanges();
TournamentParticipants.TeamId在TournamentTeam.TeamID上有一个fk关系,TeamID是一个标识列
我不明白的是,当TournamentTeam获得插入时,它会获取新的身份值。即使我调试代码,新的注册也会收到新的团队ID。但是当涉及到生成插入时,它完全避免了这个值,并在select语句之前插入,它抓住了新的标识列。
exec sp_executesql N'INSERT INTO [dbo].[TournamentParticipants]([UserID], [TournamentID], [CheckedIn]) VALUES (@p0, @p1, @p2)
SELECT [t0].[TeamID] FROM [dbo].[TournamentParticipants] AS [t0] WHERE ([t0].[UserID] = @p3) AND ([t0].[TournamentID] = @p4)',N'@p0 int,@p1 int,@p2 bit,@p3 int,@p4 int',@p0=29805,@p1=247,@p2=0,@p3=29805,@p4=247
如何让linq to sql使用我指定的team id的值,或者在insert语句之前生成select语句?
答案 0 :(得分:7)
不是设置TeamID,而是将Team实体设置为刚创建的实体。延迟SubmitChanges插入两者,然后它将在插入完成后修复id。
TournamentTeam newTeam = new TournamentTeam();
TournamentTeams.InsertOnSubmit(newTeam);
TournamentParticipant newSignup = new TournamentParticipant
{
CheckedIn = false,
TournamentID = tournamentId,
UserID = participant.UserID,
Team = newTeam
};
TournamentParticipants.InsertOnSubmit(newSignup);
SubmitChanges();