Question

I’m developing a web project where i need to add custom exception classes. For example, how can i display a message from my custom exception class when the session timeout occurs? Please help. Any sample will be helpful.

This is what i written in my exception class so far:

public class CustomException : Exception
{
    private string message;

    public CustomException ()
    {
        this.message = "Invalid Query";
    }
    public CustomException (String message)
    {
        this.message = message;

    }

}

Need to know how to link this with the session timeout, from where i need to write the logic of the same. Thank You.

Answer 1

If you are looking to throw your custom exception when the is raised you can do it like this.

try {
    DataTable dt = q.ExecuteQuery(); //This throws a timeout.
} catch(SessiontTimeoutException ste) {
    throw new CustomException("Session has timed out");
} catch(Exception e) {
    //Show unexpected exception has occured
}

Not too sure if this is what you are trying to do.
Update:
To Find out if SqlException is a TimeoutException please see this StackOverFlow Post.