Failed to convert parameter C# / SQL Server

Question

Getting error:

Failed to convert parameter value from string to a Int32

I write that code for my form and at finally when run the co

Answer 1

You are setting int parameter with strings like in:

comm.Parameters.Add(new SqlParameter("@cod", SqlDbType.Int) { Value = T4.Text });

You should parse the value in all these lines that are integers with something like:

comm.Parameters.Add(new SqlParameter("@cod", SqlDbType.Int) { Value = int.Parse(T4.Text) });