How to write connection string to sql server in Web.config

you probably need to specify an User Id and password when necessary. pls refer and try out the various connection string in this link:

SQL Server connection strings
http://www.connectionstrings.com/sql-server/

in addition, if you're using any version of Visual Studio, you can using existing wizard of Connection object to create the connection string.

How to: Create Connections to SQL Server Databases
https://msdn.microsoft.com/en-us/library/s4yys16a(v=vs.90).aspx

Thank you for quick response:

I like to use windows authentication

I replaced Data Source by localhost.

 <add name="SysDB" connectionString="Data Source=localhost;Initial Catalog=student;Integrated Security=True  " />

But I got this error

"An exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll but was not handled in user code

Additional information: 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)"

If i use  Data Source=ZBL-LT\SQLEXPRESS, it has Login failed error,


I attached a screen shot how open SSM and connect database, I didn't have password, after I click on 'connect button', it will open database.

Thank you, please give more advice.
Connection.docx

Thank you,

 <add name="SysDB" connectionString="Data Source=ZBL-LT\SQLEXPRESS;Initial Catalog=student;Integrated Security=SSPI;" />

works.