sql-server-ce

问题 I have a ASP.NET MVC 4 project - CodeFirst with Entity Framework - that was connected to a SQL Server Express database generated by EF and it was working just fine. However, I am trying to deploy to AppHarbor and having some issues with the version of SQL running there connecting with my app. So, I noticed that they have an example project that is utilizing SQL Server Compact Edition 4. Here is the web.config file for that project: https://github.com/friism/CodeFirstMigrations/blob/master/Web

问题 I trying connect to my .MDF file but I am not able to accomplish it. I tried various variations of connection strings but still getting this same error. This my connection string from app.config <connectionStrings> <add name="DBConnection" connectionString="Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\iseo-db.mdf;Integrated Security=True" providerName="System.Data.SqlClient" /> </connectionStrings> and this is how I call this connection string private string connection

问题 I'm trying to create an object for DbProviderFactory using the following code, try { var sql = ConfigurationManager.ConnectionStrings["sql"]; DbProviderFactory sqlfactory = DbProviderFactories.GetFactory ( sql.ProviderName ); // This one works fine var sqlCE = ConfigurationManager.ConnectionStrings["sqlCE"]; DbProviderFactory sqlCEfactory = DbProviderFactories.GetFactory ( sqlCE.ProviderName ); // This doesnt } catch ( Exception ex ) { Console.WriteLine ( ex.Message ); } and app.config :

问题 I'm trying to create an object for DbProviderFactory using the following code, try { var sql = ConfigurationManager.ConnectionStrings["sql"]; DbProviderFactory sqlfactory = DbProviderFactories.GetFactory ( sql.ProviderName ); // This one works fine var sqlCE = ConfigurationManager.ConnectionStrings["sqlCE"]; DbProviderFactory sqlCEfactory = DbProviderFactories.GetFactory ( sqlCE.ProviderName ); // This doesnt } catch ( Exception ex ) { Console.WriteLine ( ex.Message ); } and app.config :

问题 I'm trying to create an object for DbProviderFactory using the following code, try { var sql = ConfigurationManager.ConnectionStrings["sql"]; DbProviderFactory sqlfactory = DbProviderFactories.GetFactory ( sql.ProviderName ); // This one works fine var sqlCE = ConfigurationManager.ConnectionStrings["sqlCE"]; DbProviderFactory sqlCEfactory = DbProviderFactories.GetFactory ( sqlCE.ProviderName ); // This doesnt } catch ( Exception ex ) { Console.WriteLine ( ex.Message ); } and app.config :

问题 My program has an online and offline mode. Online it connects to a SQL Server instance using the C# SqlCommand classes. Offline it connects to a local .SDF file using the C# SqlCeCommand classes. Now I want to do the following which works when in online mode GetSqlCommand("insert into my_table (col1) values (@c1); SELECT SCOPE_IDENTITY()", conn)) So I insert a record a get back the ID of that new record with SELECT SCOPE_IDENTITY() . But when in offline mode using SQL Server CE, it throws an

问题 I have created a database and table using Visual Studio's SQL Server Compact 3.5 with a dataset as my datasource. On my WinForm I have a DataGridView with 3 columns. However, I have been unable to figure out how to get the columns to take up the full width of the DataGridView which is shown in the image below. I want to make the abbreviates column wider and then have the description column extend all the way over to the edge of the form. Any suggestions? Update: using System; using System

问题 I'm trying to verify a simple 1 field table to determine if a record exists before inserting a duplicate. if not exists (select * from url where url = ...) insert into url... Can someone Help? 回答1: Your code example will run in the full version of SQL, or you could rearrange to the following: insert into url select 'myvalue' where not exists (select * from url where url = 'myvalue') 回答2: You might want to read this thread. performing-insert-or-update-upsert-on-sql-server-compact-edition In a

问题 I'm trying to verify a simple 1 field table to determine if a record exists before inserting a duplicate. if not exists (select * from url where url = ...) insert into url... Can someone Help? 回答1: Your code example will run in the full version of SQL, or you could rearrange to the following: insert into url select 'myvalue' where not exists (select * from url where url = 'myvalue') 回答2: You might want to read this thread. performing-insert-or-update-upsert-on-sql-server-compact-edition In a

问题 I saw in forums that the limit for an SQL Server compact database is 4gb. Does anyone know if this limit has been increased yet, sql server express was recently expanded to 10GB.. Can anyone point me to the official source for this limit? 回答1: The limit for a SQL Server Compact database is 4GB. Refs: Will the SQL Compact 4.0 limited to 4GB? Microsoft SQL Server Compact 4.0 Wiki: SQL Server Compact Surprisingly, it's not on this page listing differences between SQL Server Compact 3.5, compared