Disconnected ADO.Net mode, load from Datable to Sql Table

Question

I have two Databases Movies(id, name) and SessionsCinema(id, SessionTime, movie, hall, price). id - is auto increment row.

I work in ado.net Disconnected mode with ms sql database. I want to save settings to sql table. Changes to table "Movies" is ok, but with table "SessionsCinema" there are some errors.

//connection start
SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder();
builder.DataSource = "MYPC\SQLEXPRESS";
builder.InitialCatalog = "Cinema";
builder.IntegratedSecurity = true;
SqlConnection conn = new SqlConnection(builder.ConnectionString);
//connection end


//Movies start
SqlCommand inscmd = new SqlCommand();
inscmd.CommandText = "Insert into Movies (name) values(@name); select id = @@IDENTITY from Movies";
inscmd.Connection = conn;
inscmd.Parameters.Add("@name", SqlDbType.NVarChar, 250, "name");

SqlDataAdapter adapter = new SqlDataAdapter(inscmd);
adapter.InsertCommand = inscmd;
adapter.Update(Movies);
//Movies end

//SessionsCinema start
inscmd = new SqlCommand();
inscmd.CommandText = "Insert into SessionsCinema (SessionTime, movie, hall, price) values(@SessionTime, @movie, @hall, @price); select id = @@IDENTITY from SessionsCinema";
inscmd.Connection = conn;
inscmd.Parameters.Add("@SessionTime,@movie,@hall,@price", SqlDbType.NVarChar, 250, "SessionTime,movie,hall,price");

adapter = new SqlDataAdapter(inscmd);
adapter.InsertCommand = inscmd;
adapter.Update(SessionsCinema);
//SessionsCinema end

Answer 1

You must look at closer to SqlParameterCollection.Add signature.

//SessionsCinema start
            inscmd = new SqlCommand();
            inscmd.CommandText = "Insert into SessionsCinema (SessionTime, movie, hall, price) values(@SessionTime, @movie, @hall, @price); select id = @@IDENTITY from SessionsCinema";
            inscmd.Connection = conn;
            inscmd.Parameters.Add("@SessionTime, SqlDbType.NVarChar, 250).Value = SessionTime;
            inscmd.Parameters.Add("@movie", SqlDbType.NVarChar, 250).Value = movie;
            inscmd.Parameters.Add("@hall", SqlDbType.NVarChar, 250).Value = hall;
            inscmd.Parameters.Add("@price", SqlDbType.NVarChar, 250).Value = price;
            adapter = new SqlDataAdapter(inscmd);
            adapter.InsertCommand = inscmd;
            adapter.Update(SessionsCinema);
//SessionsCinema end

Answer 2

This line is wrong:

inscmd.Parameters.Add("@SessionTime,@movie,@hall,@price", SqlDbType.NVarChar, 250, "SessionTime,movie,hall,price");

You need a separate Parameters.Add() call for each of the parameters in that list. It should look something like this:

inscmd.Parameters.Add("@SessionTime", SqlDbType.NVarChar, 250).Value = SessionTime;
inscmd.Parameters.Add("@movie", SqlDbType.Int).Value = movie;
inscmd.Parameters.Add("@hall", SqlDbType.Int).Value = hall;
inscmd.Parameters.Add("@price", SqlDbType.Money).Value = price;

Also, check your parameter from your first command. It looks like you made the same mistake there.

Answer 3

Your first command works because it has only one parameter and you define one .Add method for it. That's ok.

But your second command has 4 parameter and you can't add 4 parameter in just one .Add method.

You need to add them seperatly with SqlParameterCollection.AddWithValue like;

inscmd.Parameters.AddWithValue("@SessionTime, SessionTime);
inscmd.Parameters.AddWithValue("@movie", movie);
inscmd.Parameters.AddWithValue("@hall", hall);
inscmd.Parameters.AddWithValue("@price", price);