125 lines
4.2 KiB
C#
125 lines
4.2 KiB
C#
using System;
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using System.Xml.Linq;
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using Npgsql;
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namespace _2chSQL
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{
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public class DBLinks
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{
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// Obtain connection string information from the portal
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//
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private static string Host = "postgres.vdk2ch.ru";
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private static string User = "postgres";
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private static string DBname = "postgres";
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private static string Password = "postgres";
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private static string Port = "5432";
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public static void DbList()
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{
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// Build connection string using parameters from portal
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//
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string connString =
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String.Format(
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"Server={0}; User Id={1}; Database={2}; Port={3}; Password={4};SSLMode=Prefer",
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Host,
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User,
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DBname,
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Port,
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Password);
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using (var conn = new NpgsqlConnection(connString))
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{
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//Console.Out.WriteLine("Opening connection");
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conn.Open();
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using (var command = new NpgsqlCommand("SELECT * FROM (SELECT post_id, substring(post,1,200) FROM dvach ORDER BY post_id DESC limit 10) subquery ORDER BY post_id ASC", conn))
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{
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var reader = command.ExecuteReader();
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while (reader.Read())
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{
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Console.WriteLine(
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string.Format(
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"#{0}: {1}",
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reader.GetInt32(0).ToString(),
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reader.GetString(1)
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//reader.GetString(2)
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)
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);
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}
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reader.Close();
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}
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}
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//Console.WriteLine("На этом вся таблица!");
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}
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public static void DbUpdate(string id, string text)
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{
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// Build connection string using parameters from portal
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//
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string connString =
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String.Format(
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"Server={0}; User Id={1}; Database={2}; Port={3}; Password={4};SSLMode=Prefer",
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Host,
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User,
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DBname,
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Port,
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Password);
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using (var conn = new NpgsqlConnection(connString))
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{
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//Console.Out.WriteLine("Opening connection");
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conn.Open();
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using (var command = new NpgsqlCommand("UPDATE dvach " +
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"SET post = @postText WHERE post_id = @ID", conn))
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{
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command.Parameters.AddWithValue("ID", int.Parse(id));
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command.Parameters.AddWithValue("postText", text);
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int nRows = command.ExecuteNonQuery();
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Console.Out.WriteLine(String.Format("Number of rows updated={0}", nRows));
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}
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}
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Console.WriteLine("Данные обновлены!");
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Console.ReadLine();
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}
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public static void DbAdd(string text)
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{
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// Build connection string using parameters from portal
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//
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string connString =
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String.Format(
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"Server={0}; User Id={1}; Database={2}; Port={3}; Password={4};SSLMode=Prefer",
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Host,
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User,
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DBname,
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Port,
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Password);
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using (var conn = new NpgsqlConnection(connString))
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{
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Console.Out.WriteLine("Opening connection");
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conn.Open();
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using (var command = new NpgsqlCommand("INSERT INTO dvach " +
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"(post_id, post) VALUES (DEFAULT, @postText)", conn))
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{
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command.Parameters.AddWithValue("postText", text);
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int nRows = command.ExecuteNonQuery();
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Console.Out.WriteLine(String.Format("Number of rows updated={0}", nRows));
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}
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}
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Console.WriteLine("С добавлением закончено");
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}
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}
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}
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