Question

I am trying to verify if my SQL has been executed correctly, and if not return an error.

My code :

 var db = Database.Open("database");
            db.Execute("INSERT INTO Users(Username, Email, FirstName, SecondName) VALUES(?,?,?,?)", username, email, firstName, secondName);

Also, how can you mark a column as unique using WebMatrix? This seems to be a pretty basic functionality that I am really missing! I want to make it so that emails and usernames must be unique, but I cannot see any way to do this? I am essentially then hoping to test if the INSERT INTO can be executed (i.e there is no email/username the same already existing in the database).

Thank you for the help.

Answer 1

For your first question:

The Execute method returns the number of affected records, and your code snip is doing an insert so if it fails it’ll return a value that isn’t equal to 1.

var db = Database.Open("database");
if (db.Execute("INSERT INTO Users(Username, Email, FirstName, SecondName) VALUES(?,?,?,?)", username, email, firstName, secondName) < 1)
   throw new Exception("Wasn't able to insert User record");

The second, I’m not sure about but it should probably be asked in a separate question.