摘要：
//ExecuteScalar的作用 包含的返回值update 如果要得到想要的类型 应该再进行转换using (SqlConnection conn = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=F:\VS2010\Test\ADO\Database1.mdf;Integrated Security=True;User Instance=True")) { conn.Open(); using (SqlCommand cmd =... 阅读全文
摘要：
Console.WriteLine("请输入要插入的用户名："); string username = Console.ReadLine(); Console.WriteLine("请输入密码"); string pwd = Console.ReadLine(); using (SqlConnection conn = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=F:\VS2010\Test\ADO\Database1.mdf... 阅读全文