Catch RAISERROR from SQL Server in .NET

Question

I have a stored procedure in SQL Server that throws an error whenever a condition is hit. In order to catch this error and display it to the user, I use

try 
{
   //code
} 
catch (Exception e)
{
   return BadRequest(e.Message);
}

This catches most of the cases but on the other hand, this procedure has some print messages that also get caught by this Exception. Is there a way to catch the exception thrown only from RAISERROR and ignore this print message from SQL Server?

Answer 1

All info and error messages generated during command execution are buffered and available when a SqlException is caught. The Message property includes the text of all info messages (print statements and errors with a severity of less than 11) and the warnings/errors that caused the exception.

To ignore info messages, use the SqlException Errors collection and process only those with severity (SqlError.Class property) of 11 or higher:

catch (SqlException e)
{
   var sb = new StringBuilder();
   foreach(var error in e.Errors)
   {
       if(error.Class > 10) sb.AppendLine(error.message);
   }
   return BadRequest(sb.ToString());
}