How can we insert a value in sql server through asp.net web application.

using (SqlConnection con = new SqlConnection(strConnect))
    {
    con.Open();
    using (SqlCommand com = new SqlCommand("INSERT INTO myTable (myColumn1, myColumn2) VALUES (@C1, @C2)", con))
        {
        com.Parameters.AddWithValue("@C1", myValueForColumn1);
        com.Parameters.AddWithValue("@C2", myValueForColumn2);
        com.ExecuteNonQuery();
        }
    }

        public SqlConnection con;
        public SqlCommand cmd;
        public SqlDataAdapter adp;
        public DataSet ds;

public void connection()
        {
            con = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=practice;Data Source=HOME-78F3176757");
            con.Open();
        }

        public DataSet filldata(string mystring)
        {
            connection();
            adp = new SqlDataAdapter(mystring, con);
            ds = new DataSet();
            adp.Fill(ds);
            return ds;
        }