“SqlParameterCollection only accepts non-null SqlParameter type objects, not String objects”

Question

I keep getting the exception

The SqlParameterCollection only accepts non-null SqlParameter type objects, not String objects

, while execut

Answer 1

I had been getting the same error and had to use AddWithValue like this...

cmd.Parameters.AddWithValue(@columnToUpdate, newValue);
cmd.Parameters.AddWithValue(@conditionalColumn, conditionalValue);