connection-string

问题 I am having the architecture like this : Where MVC layer is the presentation layer. EF is class library and Repository is another class library.I am trying to insert data to database from repository by creating the EF context object. Added EF reference into Repository class library. EF having the edmx file. its app.config having the connection string generated by EF. code is : public bool CreateUser(User _user) { context.Users.Add(_user); context.SaveChanges(); return true; } but while

问题 My solution has a class lib project with a database (my DAL), and a web project to act as a WCF service layer. I add a reference to the DAL project from the web project, and when I compile, my database is copied to the Bin folder of the web project. The Web.config file needs the connection string. If I use: attachdbfilename=|DataDirectory|\Test.mdf it looks for the DB in the App_Data folder. I can easily place a copy of the DB in the App_Data folder, however, at this stage in development I'm

问题 I am securing my MVC5 project, by moving the connection strings out of web.config into an external file, and not checking this into source control, nor adding it to the project. My web.config looks like <configuration> <connectionStrings configSource="ConnectionStrings.config" /> This works perfectly in development. I have the website hosted in Azure WebSites, and I have manually defined the connectionstrings in the configuration portal. The problem is that when I publish to Azure, I get the

问题 I have multiple projects in the same solution. I would like them to share the same connectionStrings so that I don't have to change the this in multiple places. In my web configs I have <connectionStrings configSource="bin/connectionStrings.config" /> and then I have added a file as a link to my "connectionsStrings.config" which sits at the solution level. I have changed the properties so that the "Copy to Output Directory" is "Copy always" and the "Build Action" is "Content" But I get the

问题 I'm trying to connect to an Access database file using a System.Data.OleDb.OleDbConnection. I need to connect in readonly mode because another application uses it at the same time. I can connect to the database in read/write no problem but can't seem to find anywhere the correct string for readonly. I've tried: Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Mode=Read Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Extended

问题 I'm trying to connect to an Access database file using a System.Data.OleDb.OleDbConnection. I need to connect in readonly mode because another application uses it at the same time. I can connect to the database in read/write no problem but can't seem to find anywhere the correct string for readonly. I've tried: Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Mode=Read Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Persist Security Info=False;Extended

问题 I am working on the class which is not aware about the RDBMS being used. Of-course, rest of the application is well aware about it. Connection string is input to this class. I need database name. How can I extract database name from connection string irrespective of RDBMS? I read following question: How to get Database Name from Connection String using SqlConnectionStringBuilder Extract properties of sql connection string Following approaches are suggested there: Use Connection String Builder

问题 I have a winform app in .NET 4.0 with database (SQLite). I need to add an option for user to be able to change the path to the file containing the database - in short, to change the connection string. I used app.config to save connection string like this: <connectionStrings> <add name="connectionString" connectionString="Data Source=D:\myDatabase.db; FailIfMissing=True; Version=3"/> </connectionStrings> Is there a way to allow user to modify app.config file (it is located in Program Files

问题 I am learning Asp.net mvc 4 at work and modifying an asp.net mvc 4 project. Currently, the connection to the database is set in the web.config of each project. The project uses entity framework which I am also still trying to understand (I come from a java Apache Wicket background). What I want to do is have a property file for each environment(local, dev, test, production, etc..) and configure the connectionstring from the property file to use the database connection information affiliated

问题 We have a plethora of databases all sharing the same schema. They are spread about on a number of SQL Servers, some 2005, some 2008. We are getting an exception when connecting to a 2005 server AFTER having connected to a 2008 server first stating the following: An error occurred while updating the entries. See the inner exception for details. An error occurred while updating the entries. See the inner exception for details. The version of SQL Server in use does not support datatype