SQL query from C#

Question

I am trying to query SQL Server database from C#

I have class

Class_A 
{
  public fetch((string name, string last_name))
  {
    SqlConnection conn          


        

Answer 1

Use a parameterised query, and more usings, and stop with the generic exceptions.

something like this where somName and SomeLastName are the values that you wan t to query for.

String sql = "Select * From SomeTable Where [Name] = @Name and [Last_Name] = @LastName";
try
{
  using(SqlConnection conn = new SqlConnection(connection))
  {
    conn.Open();
    using( SqlCommand command = new SqlCommand(sql,conn))
    {
      command.Parameters.Add(new SqlParameter("Name", DbType.String,someName));
      command.Parameters.Add(new SqlParameter("LastName", DbType.String,someLastName));
      using(IDataReader myReader = command.ExecuteReader())
      {
        while (myReader.Read())
        {
           //do something
        }
      }
    }
  } 
  return 0; // Huh?
}
catch(SqlException sex)
{
   Console.Writeline(String.Format("Error - {0}\r\n{1}",sex.Message, sex.StackTace))
}

NB not checked might be a silly in it