Question

I have an INSERT query and I want the DB to return the ID of the row I just inserted.

sqlString = "INSERT INTO MagicBoxes (OwnerID, Key, Name, Permissions, Active, LastUpdated) VALUES (@OwnerID, @BoxKey, @BoxName, 0, 1, @Date) SET @ID = SCOPE_IDENTITY();";
cmd = new SqlCommand(sqlString, con);
cmd.Parameters.AddWithValue("@OwnerID", OwnerID);
cmd.Parameters.AddWithValue("@BoxKey", BoxKey);
cmd.Parameters.AddWithValue("@BoxName", BoxName);
cmd.Parameters.AddWithValue("@Username", Username);
cmd.Parameters.AddWithValue("@Date", DateTime.Now);
cmd.ExecuteNonQuery();

I currently have this, I’m not sure what I need to do next…

Answer 1

You just need to add @ID to the params collection and then retrieve it like this,

cmd.Parameters.Add("@ID", SqlDbType.Int, 4).Direction = ParameterDirection.Output;
cmd.ExecuteNonQuery();
//Now just read the value of: cmd.Parameters["@ID"].value

Or, if you prefer this syntax:

SqlParameter param = new SqlParameter("@ID", SqlDbType.Int, 4);
param.Direction = ParameterDirection.Output;
cmd.Parameters.Add(param);