Question

Having read around this site I thought the following code would return the ID of the item I add to my database but the int value I am trying to fill isn’t showing up in scope. Here is the code for my insert statement:

  foreach (ExOb exc in exobject)
            {

                Type type = exc.GetType();
                //Add a weight exercise
                if (type == typeof(Weights))
                {

                    Weights thisweight = (Weights)exc;
                    string InsertWeight = ("INSERT INTO WeightExercise (ExcerciseName, Duration, Sets, DiaryId) VALUES (@name, @time, @sets, @DiaryId) SET @ID = SCOPE_IDENTITY();");

                        com = new SqlCommand(InsertWeight, con);
                        com.Parameters.AddWithValue("@name", thisweight.ExcerciseName);
                        com.Parameters.AddWithValue("@time", thisweight.WeightDuration);
                        com.Parameters.AddWithValue("@sets", thisweight.TotalSets);
                        com.Parameters.AddWithValue("@DiaryId", results[0]);
                        com.Parameters.Add("@ID", SqlDbType.Int, 4).Direction = ParameterDirection.Output;
                        con.Open();
                        com.ExecuteNonQuery();
                        int ID = (int)com.Parameters["@ID"].Value;

                        con.Close();


                }
                else if (type == typeof(Cardio))
                {
                    Cardio thiscardio = (Cardio)exc;


                }

            }
        }

The database is updated with the Weight Exercise details. I have checked when debugging and the command parameter @ID holds the ID of the latest entry. Int ID does not show up in locals when debugging and if I Watch it I get:

    ID  The name 'ID' does not exist in the current context 

What am I doing wrong here?

Answer 1

I have checked when debugging and the command parameter @ID holds the
ID of the latest entry.

This indicates the database code you are currently using is functioning fine.

Int ID does not show up in locals when debugging and if I Watch it I
get…

This is the root of your question. The problem is that you’ve scoped ID to inside the

if (type == typeof(Weights))

block. Outside of that block, the identifier ID has no meaning.

Declare ID at the top of the scope for this procedure and you should be able to see it in Locals or add a Watch.