How to handle exception without using try catch?

Question

using (SqlConnection con = new SqlConnection())
{
     try
     {
          con.Open();
     }
     catch (Exception ex)
     {
          MessageBox.Show(ex.Message);
     }
}

This works fine. But I want to know can we handle exception without using try catch like some thing if else? Or is it mendetory to use try catch.

Answer 1

There is no other mechanism to handle an exception other than try catch. It sounds like you want something like

if(connection.DidAnErrorOccur)

but that doesn't exist.

Answer 2

ok, you can implementing de Application_Error in the global.asax, this method is the first line of defense for the errors and is for all the application

http://msdn.microsoft.com/en-us/library/24395wz3%28v=vs.100%29.aspx

for specific page for example default.aspx, you can implementing Page_Error

http://msdn.microsoft.com/en-us/library/ed577840%28v=vs.100%29.aspx

if you are working in mvc so you can implementing the OnException(ExceptionContext filterContext) in every controller that you want, this method is called when an unhandled exception occurs.

http://devproconnections.com/aspnet-mvc/aspnet-mvc-tutorial-handling-errors-and-exceptions

or you can implementing your error atribute

https://www.simple-talk.com/dotnet/asp.net/handling-errors-effectively-in-asp.net-mvc/

For another hand maybe you can use the Assert statement, with this you can evaluate a condition

http://msdn.microsoft.com/en-us/library/ttcc4x86.aspx