Im attempting to place data to my database, also it provides me with a mistake :

Incorrect syntax near '('.

This really is my code :

string username = Session["Session"].ToString();

            con = new SqlConnection("Data Source=MICROSOF-58B8A5\\SQL_SERVER_R2;Initial Catalog=Daniel;Integrated Security=True");
            con.Open();

            string knowWhichOne = "SELECT ID FROM Users WHERE Username='" + UserOrGuest.Text + "'";

            SqlCommand comm = new SqlCommand(knowWhichOne, con);
            int userID = (Int32)comm.ExecuteScalar();

            knowWhichOne = "SELECT ClassID FROM Users WHERE Username='" + UserOrGuest.Text + "'";

            comm = new SqlCommand(knowWhichOne, con);
            int classID = (Int32)comm.ExecuteScalar();

            knowWhichOne = "SELECT SchoolID FROM Users WHERE Username='"+UserOrGuest.Text + "'";

            comm = new SqlCommand(knowWhichOne, con);
            int schoolID = (Int32)comm.ExecuteScalar();

            if (RadioWords.Checked == true)
            {
                 game = 1;
            }
            else
            {
                 game = 2;
            }


            string sqlqueryString = "INSERT INTO (GameID, UserID, LengthOfArray, NumberOfErrors, ClassID, SchoolID) VALUES (@GameID, @UserID, @LengthOfArray, @NumberOfErrors, @ClassID, @SchoolID)";

            SqlCommand commandquery = new SqlCommand(sqlqueryString, con);

            commandquery.Parameters.AddWithValue("GameID", game);
            commandquery.Parameters.AddWithValue("UserID", userID);
            commandquery.Parameters.AddWithValue("LengthOfArray", HowMany.Text);
            commandquery.Parameters.AddWithValue("NumberOfErrors", 0);
            commandquery.Parameters.AddWithValue("ClassID", classID);
            commandquery.Parameters.AddWithValue("SchoolID", schoolID);

            commandquery.ExecuteNonQuery();
            con.Close();

I run it in debug mode, and it is accepting everything before the "ExecuteNonQuery()" line.

anybody includes a clue things i did wrong?

Thanks!

you probably did this:

INSERT INTO (GameID....

but must do this:

INSERT INTO tablename (GameID....

Your Place INTO statement is missing the title on the table into which it's supposed to place.

The syntax of the place into statement is incorrect when you are not indicating which table you're placing into.

The right syntax is

INSERT INTO table_name (column1, column2, column3,...)
 VALUES (value1, value2, value3,...)

See : http://www.w3schools.com/sql/sql_insert.asp to learn more