What purpose does “using” serve when used the following way
- by user287745
What purpose does “using” serve when used the following way:-
ONE EXAMPLE IS THIS, (AN ANSWERER- @richj - USED THIS CODE TO SOLVE A PROBLEM THANKS)
private Method(SqlConnection connection)
{
using (SqlTransaction transaction = connection.BeginTransaction())
{
try
{
// Use the connection here
....
transaction.Commit();
}
catch
{
transaction.Rollback();
throw;
}
}
}
OTHER EXAMPLE I FOUND WHILE READING ON MICROSOFT SUPPORT SITE
public static void ShowSqlException(string connectionString)
{
string queryString = "EXECUTE NonExistantStoredProcedure";
StringBuilder errorMessages = new StringBuilder();
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand command = new SqlCommand(queryString, connection);
try
{
command.Connection.Open();
command.ExecuteNonQuery();
}
catch (SqlException ex)
{
for (int i = 0; i < ex.Errors.Count; i++)
{
errorMessages.Append("Index #" + i + "\n" +
"Message: " + ex.Errors[i].Message + "\n" +
"LineNumber: " + ex.Errors[i].LineNumber + "\n" +
"Source: " + ex.Errors[i].Source + "\n" +
"Procedure: " + ex.Errors[i].Procedure + "\n");
}
Console.WriteLine(errorMessages.ToString());
}
}
}
I AM doing at top of page as using system.data.sqlclient etc so why this using thing in middle of code,
What if I omit it (I know the code will work) but what functionality will I be losing
