sql-server-ce

问题 We are developing an occasionally connected application that uses SQL Compact on the client machines and SQL Server 2008 (with change tracking) on the server. The application is being developed using Entity Framework’s code first model, which requires that the local SQL Compact database be 4.0. We would like to use Microsoft Sync Framework to handle synchronizing data from the central server to the occasionally connected clients but recently discovered that while SQL Compact 3.5 SP2 is

问题 Does anyone know if it's possible to downgrade an existing SQL CE 4 database to 3.5? The reason I ask is because I'm looking to migrate from SQL CE to VistaDB...and VistaDB's data migration wizard only takes SQL CE 3.5 db's. 回答1: Yes, you can use my scripting tools to export the 4.0 file to a sql script, and create the 3.5 file from the script, as I describe here: http://erikej.blogspot.com/2010/02/how-to-use-exportsqlce-to-migrate-from.html 回答2: I actually just found an answer to my own

问题 I am getting a "Permission denied" exception when I connect to a .sdf file. I am using this connection string. connection string="Data Source=|DataDirectory|\DB.sdf;Password='something';Mode = Read Only;Temp Path= Environment.GetFolderPath(Environment.SpecialFolder.Templates);Persist Security Info=True"" providerName="System.Data.EntityClient" /> This is work fine on Win 7 but when I run my app on Win XP it returns Permission denied exception I tried different address for temp file but it

问题 SQLCe doesn't support TimeSpan, so I need to save this in some other way. Is it possible to define somewhere a default conversion, like in the DbContext, or would I need to handle this manually in the repositories? I don't like to change my entity classes just because of this. Btw, I only save TimeSpan of < 24h. Example would be great if there are some neat tricks. 回答1: I know you say you don't want to modify your entities, but if you're using code first this would be pretty simple to do by

问题 I've read a fair number of questions on how to upgrade a database for developer and such, and I'm leaning towards using migratordotnet or something similar, however it seems the the upgrades need to be run with something like MSBuild or NAnt. These are not things I should expect an end-user to have installed. Ideally the process should be the user installs the new version of the app, launches it and it takes care of everything behind the scene. Depending on how long the process takes I may or

问题 In SQL Server CE can I create an identity column with data type uniqueidentifier ? If so, how? If not, why not? I have tried creating it with "New Table"from the Server Explorer in VS2010, and the Identity option only gets enabled when the type is int. Edit: According to EricEJ's suggestion I did make the column PK. I also set it to be a "RowGuid" CREATE TABLE [MyTable] ( [Id] uniqueidentifier ROWGUIDCOL ... I don't know exactly the intended purpose of the RowGuid property, but it seem to

问题 Here is my data |Id |EmpCode |CheckInCheckOutDate |WorkDate |InOutMode |247 |51 |2017-02-13 20:08:52.000 |2017-02-13 20:08:52.000 |0 |392 |51 |2017-02-13 22:38:51.000 |2017-02-13 22:38:51.000 |1 |405 |51 |2017-02-13 22:59:18.000 |2017-02-13 22:59:18.000 |0 |415 |51 |2017-02-13 23:18:17.000 |2017-02-13 23:18:17.000 |1 |423 |51 |2017-02-13 23:33:44.000 |2017-02-13 23:33:44.000 |0 |456 |51 |2017-02-14 01:30:15.000 |2017-02-13 01:30:15.000 |1 |463 |51 |2017-02-14 02:52:02.000 |2017-02-13 02:52:02

问题 I am attempting to create an ASP.NET MVC 3 application using C#, Entity Framework 4.0 code-first and SQL Server CE, and the automated scaffolding. Everything works fine until I try to actually use a page that connects to the SQL Server CE database. My connection in the web.config is this <add name="BRX" connectionString="Data Source=|DataDirectory|BRX.sdf" providerName="System.Data.SqlServerCe.4.0"/> My model class looks like this using System; using System.Collections.Generic; using System

问题 SQLCEToolbox looks very promising. I installed it, opened VS 2012, selected Tools | SQL Server Compact Toolbox, quickly and easily set up a connection to my sdf database, which I had (also quickly and easily) created in WebMatrix. I then right-clicked the database in SQLCEToolbox's treeview and selected Import from CSV file. Note: One must explicitly specify the column names on the first line in the file (line/row 0) and explicitly add the ID/Primary Key/Identity vals (if you have such a

问题 I have created a setup project in my application in order to include SQL compact 4 in the installation, as a prerequisite downloadable at the vendor's site (microsoft). I did everything thourg Visual Studio 2010 console (with SP1). Now, when I try to install the package, the setup doesn't realize that SQL compact is installed. Why? I don't want to use any other form of private deployment like copying the dlls and including them into my project. Thanks! 回答1: Most likely the prerequisite is not