catch mysql-exception using .Number

问题

I want to catch a specific mysql error with the number 1046. If i use MessageBox.Show to display the error number it is always 0, no matter which Exception it is. Shouldn't the Exception have a number like the number 1046?

catch (MySqlException mysqlex)
{ 
    MessageBox.Show(mysqlex.Number.ToString());
}

EDIT: Sorry, i am using the MySQL-Connector / Net.

回答1:

You don't see a number because you did not connect to a database. And probably MySQL is assigning numbers to error exceptions.

If you look at description for Number property here it says

Gets a number that identifies the type of error. This number corresponds to the error numbers given in Server Error Codes and Messages.

Because you did not made a connection to the server you cannot get server error code.

Check your connection string.

回答2:

Probably same problem as this.

please try in the following code.

MessageBox.Show(mysqlex.InnnerException.Number.ToString());

来源：https://stackoverflow.com/questions/22557433/catch-mysql-exception-using-number