connection-string

问题 How to connect SQL Server on button click? I want to manually enter the Server, Username and Password into textboxes. I have a code here but I'm not sure if it's correct. Private Sub SQLConnect_Click(sender As Object, e As EventArgs) Handles SQLConnect.Click Dim con As SqlConnection = New SqlConnection("Server=" & SQLServer.Text & ";Database=GameDB;User Id=" & SQLUser.Text & ";Password=" & SQLPwd.Text & ";") con.Open() MsgBox("Successfully Connected!") 'con.Close() End Sub Idk how to check if

问题 I have a Class Library, which inside just has a DataSet (MySQL connector) and a Connector class. I use this class in multiple projects to connect to the database, and I always had the password embedded in the connection string but now I need to be able to modify this string(for security purposes) so I can have the user connect using their own account. How can I modify this connection string. I have tried the following Properties.Settings.Default.DataBaseConnectionString = "String"; But it

问题 A tricky (and frustrating problem) - perhaps you folks may be clever enough to solve it: Problem I want to be able to read/write to my database using Entity Frameworks. I have got a simple app rails running on Heroku (straightforward scaffold). I want to connect to this database and manipulate records. The good news is that I can successfully connect to that database using npgsql. The bad news is that I cannot do it with Entity Frameworks. This is the error I’m receiving: System.Data.Entity

问题 I programmed an application with an attached .mdf database file that works fine on my computer. But on another computer (client PC) I get this error message : A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 52 - Unable to locate a Local Database

问题 We are using jdbc url like jdbc:mysql://localhost:3306/mysql . How could I set second mysql host in this url? If this is imposible, how could I set in my java application (hibernate) connection to second MySQL server? Thanks! PS. actually we want to parallelize operations to two different databases. Is there any solution for that in Hibernate? 回答1: This is really about failover/clustering. jdbc:mysql://192.168.29.20:3306,192.168.29.20:6306/mysql should do it. see http://lists.mysql.com

问题 My client asked the posibility to switch from a c# app from the "CURRENT" database to a TEST database or DEV database. Only one can be active at a time. In a menu file she choose DEV or TEST database. How do I configure hibernate.cfg.xml file to have more connection strings like app.config. <name="CURRENT" connectionString='User Id=u1;Data Source=CURRENT;Password=...' /> <name="DEV" connectionString='User Id=u1;Data Source=DEV;Password=...' /> <name="TEST" connectionString='User Id=u1;Data

问题 I have a simple WinForms app that will eventually be a game. Right now, I'm just working on the data access layer of it and I've run into a snag. I created a separate project called DataAccess and inside of that, I created a local .mdf SQL Server database file. I also created an app.config file to store the connections string. Here's that config file: <?xml version="1.0" encoding="utf-8" ?> <configuration> <connectionStrings> <add name="TBG_Master" connectionString="Data Source=(localdb)

问题 I have an excel file like this: | | A | B | C | D | | 1 | Name 1 | Name 2 | Name 3 | Name 2 | | 2 | Data | Data | Data | Data | | 3 | Data | Data | Data | Data | As you can see, headers of two columns have the same name - Name 2 . My question is, is it possible to tell the ADO engine from which column to select data? Currently my select looks like this: SELECT [Name 1], [Name 2] FROM [REPORT7_RAW$] WHERE [Name 1] IS NOT NULL and ADO picks up the data from column which is listed under column B

问题 In my Azure App Service I want to update application settings, but after publish from VS the keys doesn't override values from local Web.config In Azure it looks like: In the result my web.config on azure contains values from local settings <connectionStrings> <add name="MainConnectionString" connectionString="ConnectionStringToReplaceByAzure" providerName="System.Data.SqlClient" /> </connectionStrings> <appSettings> <add key="MS_SigningKey" value="Overridden by portal settings" /> <

问题 We are using an Informix database, and are connecting to it from .NET sucessfully using ODBC. The connection string we are using is; DRIVER={IBM INFORMIX ODBC RIVER}; UID=username; PWD=password; DATABASE=our_database; HOST=devsrv01; SERVER=devsrv01_tcp; SERVICE=ids9tcp2; PROTOCOL=onsoctcp; CLIENT_LOCALE=en_US.CP1252; DB_LOCALE=en_US.819; We want to change from ODBC and use IBM's SDK and libraries as outlined on their site. The code we are using is; string ConnectionString = "Database=our