ADO.NET - The Size property has an invalid size of 0

Question

I\'m trying to get output value from DB via ADO.NET. There\'s a client code:

    using (var connection = new SqlConnection(ConnectionString))
    {
                


        

Answer 1

VarChar and NVarChar are variable width character fields (thus var+char). You have to set the length, otherwise the default is zero.