public static void read()
{
string query = "SELECT * FROM users";
var users = DbConnector.Query(query);
foreach (var user in users)
{
Console.WriteLine(user["id"] + " " + user["first_name"] + " " + user["last_name"] + " " + user["favorite_number"]);
}
}
public static void Read()
{
string query = "SELECT * FROM users";
var AllUsers = DbConnector.Query(query);
foreach (var user in AllUsers)
{
Console.WriteLine("This is {0} {1}, and their favorite number is {2}", user["FirstName"], user["LastName"], user["FavoriteNumber"]);
// Console.WriteLine($"{user["FirstName"]} {user["LastName"]}, {user["FavoriteNumber"]}");
}
}
public static void Read()
{
var users = DbConnector.Query("SELECT * FROM users");
foreach (var user in users)
{
foreach (var prop in user)
{
System.Console.WriteLine($"{prop.Key}: {prop.Value}");
}
}
}
static void Read()
{
List <Dictionary <string, object> > list = DbConnector.Query("SELECT * FROM Users;");
System.Console.WriteLine("Id\tName\t\tFave #");
foreach (Dictionary <string, object> item in list)
{
System.Console.WriteLine("{0}\t{1}\t{2}", item["id"], item["FirstName"] + " " + item["LastName"], item["FavoriteNumber"]);
// foreach(KeyValuePair<string, object> pair in item)
// {
// System.Console.WriteLine("Key is {0}, Value is {1}", pair.Key, pair.Value);
// }
}
}
public static void Main(string[] args)
{
System.Console.WriteLine("Enter first name: ");
string fname = Console.ReadLine();
string lname = Console.ReadLine();
int fnum = Console.Read();
DbConnector.Query("SELECT idUsers, FirstName, LastName, FavoriteNumber FROM Users");
DbConnector.Execute("INSERT INTO Users(FirstName, LastName, FavoriteNumber) VALUES ('{fname}', '{lname}', fnum)");
var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseStartup <Startup>()
.Build();
host.Run();
}
public static void Create()
{
Console.WriteLine("Create new instance? type (yes/no)");
string confir = Console.ReadLine();
if (confir == "yes")
{
Console.WriteLine("Please input first name:");
string first_name = Console.ReadLine();
Console.WriteLine("Last name:");
string last_name = Console.ReadLine();
Console.WriteLine("Favorite Number:");
string favoritenumber = Console.ReadLine();
String query = $"INSERT INTO users(first_name,last_name,favoritenumber,created_at,updated_at) VALUES ('{first_name}','{last_name}',{favoritenumber},NOW(),NOW())";
Console.WriteLine(query);
List <Dictionary <string, object> > A = DbConnector.Query(query);
Console.WriteLine("Added!");
}
else
{
Console.WriteLine("Next time !");
}
}
public static void Update()
{
string query = "UPDATE users SET";
string query_firstname = "";
string query_lastname = "";
string query_favoritenumber = "";
bool a = false;
bool c = false;
bool b = false;
Console.WriteLine("Want to update database? (yes/no)");
string confir = Console.ReadLine();
if (confir == "yes")
{
Console.WriteLine("Which user do you want to update ? (type in user ID)");
string ID = Console.ReadLine();
var temp1 = DbConnector.Query($"SELECT COUNT(id) FROM users WHERE id = {ID}"); //check if this user exists, by using Count(), return List<Dictionary<string,object>>
List <object> temp2 = temp1[0].Values.ToList(); //get first value which is number of how many matches, USING SYSTEM.LINQ IN ORDER TO USE ToList() to convert KeyCollction to List
int existance = Convert.ToInt32(temp2[0]); //Error:"Unable to cast object of type 'System.Int64' to type 'System.Int32'."
if (existance != 0)
{
Console.WriteLine("want to update first name?(type first name or just type no)");
string first_name = Console.ReadLine();
if (first_name != "no")
{
query_firstname = $" first_name = '{first_name}'";
}
else
{
a = true;
}
Console.WriteLine("want to update last name?(type last name or no)");
string last_name = Console.ReadLine();
if (last_name != "no")
{
query_lastname = $" ,last_name = '{last_name}'";
}
else
{
b = true;
}
Console.WriteLine("want to update favorite number(type number or no)");
string favoritenumber = Console.ReadLine();
if (favoritenumber != "no")
{
query_favoritenumber = $" ,favoritenumber = {favoritenumber}";
}
else
{
c = true;
}
if (a && b && c)
{
Console.WriteLine(" You did not input, update fails !");
}
else
{
query = query + query_firstname + query_lastname + query_favoritenumber + $" WHERE id = {ID}";
Console.WriteLine(query);
DbConnector.Query(query);
}
}
else
{
Console.WriteLine("Record does not exist!");
}
}
}