C# SQL Server Connection
You can connect your C# application to data in a SQL Server database using the .NET Framework Data Provider for SQL Server. The first step in a C# application is to create an instance of the Server object and to establish its connection to an instance of Microsoft SQL Server.
The SqlConnection Object is Handling the part of physical communication between the C# application and the SQL Server Database . An instance of the SqlConnection class in C# is supported the Data Provider for SQL Server Database. The SqlConnection instance takes Connection String as argument and pass the value to the Constructor statement.
Sql Server connection string
If you have a named instance of SQL Server, you'll need to add that as well.
When the connection is established , SQL Commands will execute with the help of the Connection Object and retrieve or manipulate the data in the database. Once the Database activities is over , Connection should be closed and release the Data Source resources .
The Close() method in SqlConnection Class is used to close the Database Connection. The Close method rolls back any pending transactions and releases the Connection from the SQL Server Database.
A Sample C# Program that connect SQL Server using connection string.
Connect via an IP address
1433 is the default port for SQL Server.
Trusted Connection from a CE device
This will only work on a CE device
Connecting to SQL Server using windows authentication
A sample c# program that demonstrate how to execute sql statement and read data from SQL server.
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A sample C# program that perform Data Manipulation tasks like Insert , Update , Delete etc. also perform by the ExecuteNonQuery() of SqlCommand Object.