sqlconnection

I found this piece of code in one application Database database = DatabaseFactory.CreateDatabase("connection string"); DbConnection connection = database.CreateConnection(); connection.Open(); SqlConnection sqlConnection = (SqlConnection)connection; Is it safe, SqlConnection derieve from DbConnection. Database comes from Microsoft.Practices.EnterpriseLibrary.Data. According to documentation CreteDatabase returns DbConnection. No it is not safe, casting is never safe and it may blow anytime while your application is running. While SqlConnection derives indeed from DbConnection you are not

Can I call a dll from a stored procedure using the open connection? I have a dll that gets data from SQL Server and I don't want to open a new connection when I call it from the stored procedure. Thank you Here is an exemple public class Class1 { public static SqlString GetName(SqlString str) { SqlCommand cmd = new SqlCommand(str.ToString()); cmd.CommandType = System.Data.CommandType.Text; string name = cmd.ExecuteScalar().ToString(); return name; } } and this is the SQL code CREATE FUNCTION fn_TestConnection ( @str nvarchar(255) ) RETURNS nvarchar(max) AS EXTERNAL NAME TestConnection.

For SQL connection pool, why do we need to set up a min pool size? As connections will be saved in the connection pool and reused, why do we need to keep live connections specified by the min pool size? Thanks. Opening and maintaining connections is expensive, so if you know that you need multiple connections (always) it's better to specify the MinPoolSize because then it's ensured that these connections are available. Also, from MSDN : If MinPoolSize is either not specified in the connection string or is specified as zero, the connections in the pool will be closed after a period of

I've been trying to connect to my database (which is on the same computer as my code) through my C# code. The problem is I keep getting the "Login failed for user " "" error... I admit that my knowledge of connecting to databases is minimal and I've tried almost all the steps in other questions! here's part of my code: SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["SQLServerConnection"].ConnectionString); SqlCommand command = connection.CreateCommand(); command.CommandText = @"IF EXISTS ( SELECT * FROM user WHERE EMAILADRES = @email and WACHTWOORD =

Which of the following two examples are correct? (Or which one is better and should I use) In the MSDN I found this: private static void ReadOrderData(string connectionString) { string queryString = "SELECT OrderID, CustomerID FROM dbo.Orders;" using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = new SqlCommand(queryString, connection); connection.Open(); SqlDataReader reader = command.ExecuteReader(); // Call Read before accessing data. while (reader.Read()) { Console.WriteLine(String.Format("{0}, {1}", reader[0], reader[1])); } // Call Close when done