为什么我用c#建立数据库后 不能立即进行与数据库的连接？

Question

为什么我用c#建立数据库后 不能立即进行与数据库的连接？
建立不了连接我就不能立即给数据库建表了
String str;
                            SqlConnection myConn = new SqlConnection("Server=localhost;Integrated security=SSPI;database=master");
                            str = "CREATE DATABASE TicketDB1 ON PRIMARY " + "(NAME = TicketDB_Data, " +
                                "FILENAME = 'D:\\TicketDB1_Data.mdf', " +
                                 "SIZE = 10MB, MAXSIZE = 50MB, FILEGROWTH = 10%) " +
                                 "LOG ON (NAME = TicketDB1_Log, " +
                                 "FILENAME = 'D:\\TicketDB1Log.ldf', " +
                                 "SIZE = 5MB, " +
                                 "MAXSIZE = 25MB, " +
                                 "FILEGROWTH = 10%)";
                            SqlCommand myCommand = new SqlCommand(str, myConn);
                            try
                            {
                                myConn.Open();
                                myCommand.ExecuteNonQuery();
                                MessageBox.Show("数据库建立成功", "TicketDB1", MessageBoxButtons.OK, MessageBoxIcon.Information);
                                myConn.Close();
                            }
                            catch (System.Exception ex)
                            {
                                MessageBox.Show(ex.ToString(), "TicketDB1", MessageBoxButtons.OK, MessageBoxIcon.Information);
                            }
                            try
                            {
                                string ConnString2 = "Data Source=" + Datasource + ";Integrated Security=SSPI;Initial Catalog=TicketDB1;";
                                SqlConnection conn2 = new SqlConnection(ConnString2);
                                conn2.Open();
                                if (conn2.State == ConnectionState.Open)
                                {
                                    MessageBox.Show("数据库连接成功");
                                }
                            }
                            catch
                            {
                                MessageBox.Show("数据库连接失败");
                            }
运行代码后走总显示数据库连接失败

Answer 1

string ConnString2 = "Data Source=" + Datasource + ";Integrated Security=SSPI;Initial Catalog=TicketDB1;"
Datasource应该是服务器的名字，一般就是计算机名，我不知道你这个Datasource参数是代表什么？