“Specified cast is not valid” accessing a DataReader

I was expecting a double from the database , and I had some simple code to place it into a variable:

double total = double.Parse(reader["total"].ToString());

I received a “Specified cast is not valid” exception. But looking at the value being returned from the database, it wasn’t null, and the value looked like a good double to me. More digits to the right of the decimal place that I had seen with the other doubles, but that’s it. I found a way around it by using the DataReader.GetOrdinal method:

double total = double.Parse(reader.GetOrdinal("total").ToString());
  1. Leave a comment

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: