Visual Studio中访问SQL数据库的代码
string strCon = "Data Source=.;Initial Catalog=Northwind;uid=sa;pwd=Daniel"; using (SqlConnection con = new SqlConnection(strCon)) { using (SqlCommand cmd = con.CreateCommand()) { string strSql = "select count(*) from Customers"; cmd.CommandText = strSql; con.Open(); int intCount = Int32.Parse(cmd.ExecuteScalar().ToString()); //ExecuteScaler(); Console.WriteLine(intCount); cmd.CommandText = "select * from Customers"; string strS = cmd.ExecuteScalar().ToString(); //ExecuteScalar() 返回结果集的首行首列 Console.WriteLine(strS); //ALFKI 返回结果集的首行首列 } } Console.ReadKey();