I'm developing an application that needs to access files on computers in an intranet, the files are database files and each computer has its own database, from what i have read i need to use a //server connection string, however I want to code my application in such a way that the user selects the computer they want to retrieve the that from for example they would select "Computer 2" and the application would create the connection string, connect to the database and populate it
I would recommend creating a connection string for each machine you are accessing in the web.config file and then using the user's selection to pull the correct connection string from the config file to instantiate the connection.
I have it working with this code
string myconnectionstring = #"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=\\" + PCName + #"\data\data.mdb"
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I'm writing a portable program that can be used on other computers as well as mine and It also connects to the SQL Database on that computer.
So the problem is that I don't have the database name of that computer. How can my program connect to that Database without previously knowing the database name?
In other words, I don't have enough information to create a complete ConnectionString.
Connect to SQL Server's master database first.
Then, using this query, you can get data from databases in your database:
SELECT name FROM master.dbo.sysdatabases
Using the site below, you can find the right Connection strings for you :
https://www.connectionstrings.com/
You can use a dot in the connection string to represent.tbe local server.
Create a txt file, rename the extension to UDL. Open the UDL file and put a dot, a full stop:
If you have installed a SQL Instance (ie not the default instance) it will be .\InstanceName
Choose the Database drop down and click Test Connect.
Finally close the URL file and open it with NotePad and you will see the connection string.
I have a C# windows form application and I connect it to the SQL server in my computer. Now I going to deliver the software to a user. So, what can I do to change the connection string to the user SQL server? Is there any way to do the connection string computer independent? Kindly help me
Regards.
I'm assuming you're hard-coding connection strings into your code. You need an application config file.
Or you could use connection string like this (if database (SQL server) is on same machine as app using it and database name is the same) :
Server=localhost\instanceName;Database=myDataBase;User Id=myUsername;Password=myPassword;
instanceName could be "nothing" (default instance) or named instance (SQLEXPRESS).
Or do it as #Xavier J suggested - store connection string in app config or INI file.
application config files are one idea, but because they are managed through the IDE means have to change manually for deployment.
Better to use the registry (cleaner too - no need to post-edit the file), and the installer can get conditional on where it's deployed, alternatively ask the user during installation, skip if the registry entry already exists.), confirm the connection string at install time. database path/host/name exists...
You can store it in the app.config of your project. Then if you wanted the user to give credentials you could make a form and save the string to the value of that configuration.
<appSettings>
<add key="connectionString" value="Connection string goes here"/>
</appSettings>
Then call it and set it using the ConfigurationManager
ConfigurationManager.AppSettings["connectionString"] = "Your Value";
Or you could just replace the connection string yourself in the file once its on the users computer
I have a winForm application which will be used by more than one persone, I want to put the database in a machine server so can everyone connect to it from this application.
I'm using SqlServer database, this database will be located in a local network.
This is the connection string I use to get data from a database located in my machine
string con = "Data Source=MSSQL1;Initial Catalog=AdventureWorks;Integrated Security=true;";
My question is what is the connection string that I should use to get data from database located in a machine server ?
Is it something like this ?
Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;
Thanks.
Without any specific information nobody will be able to answer this for you, however This Resource. might help you find it for yourself.
I have a SQL Server database located at http://192.168.10.3/MyDB. I have created a C# MVC application, and I need to know the steps to connect my application to the above database.
Is it only replacing the connection string in the web.config file ?
Data Source=?? ;Initial Catalog=??;Integrated Security=SSPI;
User ID=??;Password=pwd;
If so what am I to replace where I have placed the ?? sign ?
DataSource = 192.168.10.3
Initial Catalog = MyDB
User ID = whatever sql login you are using to access your SQL Server
Password = password for the sql login above
The other answers here are good. In addition, ConnectionStrings.com can be your friend, especially if you are going to connect to various types of databases in the future. Select the database that you need to connect to and then you'll see the different connection strings you can use for that database.
http://connectionstrings.com/sql-server-2012#sqlconnection
you can try this
create a new text document on your desktop - conn.txt
change file extension to udl (conn.udl)
double click to open the file in the first tab select appropriate provider
4 . in the second tab enter server name (ip address,port), username, password (check Allow saving password) and database name.
test connection
if the test reports success close the window.
open the file with notepad, copy everything but the provider name and paste it back to connectionString
Below is connection string you need for:
Data Source="192.168.10.3" ;Initial Catalog=MyDb;Integrated Security=SSPI;
User ID=sa (for example);Password=whatever you set before;
Using VC# I've created a staff management app that, upon its first run, is expected to query the user for the path to a (.mdf) database which will reside on a remote computer. A resulting path may be something like
string dbPath = #"P:\remoteComputer\public\StaffTool\ExamplePersonnelDatabase.mdf";
Then I'm placing this string into a connection string template as so:
string dbConnectTemplate = #"Data Source=.\SQLEXPRESS;AttachDbFilename={0};Integrated Security=True;Connect Timeout=30;User Instance=True";
string dbConnectionString = String.Format(dbConnectionTemplate,dbPath);
Then I'm attempting to connect to the database LINQ to SQL style
ManagementDBDataContext db = new ManagementDBDataContext(
dbConnectionString);
At this point, an error pop's up stating that
The file "P:\remoteComputer\public\StaffTool\ExamplePersonnelDatabase.mdf" is on a network path that is not supported for database files.
An attempt to attach an auto-named database for file P:\remoteComputer\public\StaffTool\ExamplePersonnelDatabase.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
As I am relatively new to databases, I completely do not understand this message. And obviously, the file is not on a UNC share.
Any ideas?
Jim Lamb recommended that I connect to an instance of SQL server running remotely. Considering that I'm using LINQ to SQL, what refactoring do I have to do to make this happen? Other ideas still welcome - especially "push this button and everything will work" solutions.
Another clue: A coworker said that there used to be some way to work through Control Panel->Administrative Tools->Data Sources(ODBC) so that a remote database could be viewed from my computer as if it was local. The coworker didn't know any more details besides this.
You are attempting to connect to a database file on another machine over a network connection, which isn't supported by SQL Express. You'll need to make a local copy and attach to that, or connect to an instance of SQL that's running on the same machine as the MDF file.