sql-server-ce

问题 I have a mobile app that is using LinqToDatasets to update/insert into a SQL Server CE 3.5 File. My Code looks like this: // All the MyClass Updates MyTableAdapter myTableAdapter = new MyTableAdapter(); foreach (MyClassToInsert myClass in updates.MyClassChanges) { // Update the row if it is already there int result = myTableAdapter.Update(myClass.FirstColumn, myClass.SecondColumn, myClass.FirstColumn); // If the row was not there then insert it. if (result == 0) { myTableAdapter.Insert

问题 I'm using Sql Server Compact for automated integration tests of our web application, which runs the latest version of Sql Server (large? uncondensed?). The idea was to use a more lightweight database to mimic our own, which would be easy to create and destroy for tests. I'm aware of the limitations that CE has in comparison to Sql Server, and am willing to work around these by either trying to avoid the features that aren't supported in CE or working around the tests for the areas of our app

问题 I finally found some resources and a solution. I will share it here. 回答1: It is documented here that this indeed is a feature and not a bug. In this excellent series of blogs you can find anything you always wanted to know, but never dared to ask about SQLServerCompact 4.0 The author of these blogs has made a wonderful Add-In for Visual Studio 2010 that adds Entity Data Model wizard functionality to create a model from a SQLServerCompact 4.0 database for any type of project. 来源： https:/

问题 I am currently trying to move an application from a Microsoft Access database to an SQL Server Compact Edition one. I have managed to convert the database using SSMA and SQL Toolbox, but I am having some errors using the old c# code for queries (as expected). I have been able to fix things as I go along so far, but I am a bit stumped with this one: OleDbDataAdapter internal error: invalid row set accessor: Ordinal=# Status=UNSUPPORTEDCONVERSION After looking around on stackoverflow and google

问题 I'm using SQL Server CE for rapid application development purposes and have hit a little snag - it doesn't seem to support changing the start day of the week. What I've tried: SET DATEFIRST 1; which yields: Unrecognized SET statement as a response (both via a query window and through code). I've googled around and can't find anything in the documentation as to whether changing the start date of a week is supported or isn't supported by SQL Server Ce, nor can I find any alternative method of

问题 How to synchronize data with SQL Server Standard Edition and SQL Server Compact Edition? I hope you will give positive answer regarding this question. 回答1: You can use 3 different sync technologies with SQL Server Compact 3.5 and SQL Server: Merge replication, ADO.NET Sync Framework and RDA 来源： https://stackoverflow.com/questions/8968445/synchronization-between-sql-server-ce-and-sql-server

问题 We have an Office Addin that uses Sql CE with the usual DBConnection to a *.sdf in the filesystem ('C:/...etc...'). When we start two copies of the application having the Sql CE-augmented Office Addin (testing what a user might do by mistake) the Sql CE database becomes corrupted and the Office Addin can no longer access its data. It seems like we are missing some basic way of avoiding a seemingly obvious problem. By now everyone knows that Sql CE does not lock its rows allowing the sort of

问题 This code causes an error when I try to execute it. My requirement get latest inserted incrementation id _connection.Open(); cmd.Connection = _connection; cmd.CommandText = "Insert into Finalresult(Section_name, userId, examid) Select Section_name, User_id, Exam_id from result" + "WHERE (User_id = '" + userid + "' Exam_id='" + examis + "' And Section_name='" + section + "')SELECT SCOPE_IDENTITY()"; Int32 newId = (Int32)cmd.ExecuteScalar(); Error occurs at line Int32 newId = (Int32)cmd

问题 Ok first off, Hi every one this is my first post. Right now to business, I have created an SQLCE database, created the data context and all the mappings and have successfully filled the database with a load of data. So far so good, now if I want to retrieve the data I get a problem. Code for getting data var codes = (from c in App.BonusDatabase.tbRawData select c).ToList(); Running that I get Specified cast is not valid. I'm guessing there is a value somewhere it doesn't like, how can I find

问题 I've done a bit of Googling trying to find out how to convert a .MDF file to a .SDF . There doesn't seem to be much around apart from an old article for something called 'SQL Server to SQL Server Compact Edition Database Copy Utility'. As this is so old, I doubt it will work with the newer versions of SQL Server databases. Is there a more established and official method of achieving this now? Ideally I need something that will migrate the data as well as the table structures. 回答1: You can use