小编jon*_*nny的帖子

每当我尝试在VS 2010中创建一个新项目时,我都会收到错误消息:

由于错误,无法初始化新项目/项目对话框:抛出了类型"Microsoft.VisualStudio.Dialogs.DialogInitializationException"的异常.

当试图打开现有项目时,visual studio 2010重新启动.

我正在尝试在我的酒店预订项目上实施按日期筛选.

有人可以帮我把这个sql代码转换成linq.

SELECT r.*
FROM Room r LEFT JOIN Reservation v ON r.RoomID = v.RoomID
AND NOT (@StartDate >= Date_Check_Out OR @EndDate <= Date_Check_In)
AND v.cancel = 0
WHERE v.ReservationID IS NULL

我正在开发一个联系人列表应用程序,我需要创建2个表,因为我想进行连接.我试图在我的数据库中创建2个表,但在创建"创建视图"时出现了一些错误.

这是我得到的堆栈跟踪:

01-04 21:24:32.132: E/Database(4183):           Failure 1 (near "EXIST": syntax error) on 0x123c38 when preparing 'CREATE VIEW IF NOT EXIST ViewGroups AS SELECT contactTest1._id AS _id, contactTest1.name, contactTest1.phone, contactTest2.numegrup FROM contactTest1 JOIN contactTest2 ON contactTest1.idgrup =contactTest2._id'.
01-04 21:24:32.251: E/SQLiteOpenHelper(4183):   Couldn't open contacte.db for writing (will try read-only):
01-04 21:24:32.251: E/SQLiteOpenHelper(4183):   android.database.sqlite.SQLiteException: near "EXIST": syntax error: CREATE VIEW IF NOT EXIST ViewGroups AS SELECT contactTest1._id AS _id, contactTest1.name, contactTest1.phone, contactTest2.numegrup FROM contactTest1 JOIN contactTest2 ON contactTest1.idgrup =contactTest2._id
01-04 21:24:32.251: E/SQLiteOpenHelper(4183):   at …