147 lines
5.0 KiB
C#
147 lines
5.0 KiB
C#
using Npgsql;
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namespace NeDvachAPI
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{
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public class DBchat
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{
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// Obtain connection string information from the portal
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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 List<Post> DbList()
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{
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// Build connection string using parameters from portal
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//Post[] posts = new Post[10];
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List<Post> posts = new List<Post>();
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//int postCount = 0;
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string received = "";
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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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conn.Open();
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// using ( var command = new NpgsqlCommand(@"
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// SELECT * FROM
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// (SELECT post_id, substring(post,1,200)
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// FROM dvach
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// ORDER BY post_id DESC
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// limit 10
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// )
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// subquery ORDER BY post_id ASC", conn) )
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using ( var command = new NpgsqlCommand(@"
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SELECT * FROM
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(
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SELECT post_id, post
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FROM dvach
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ORDER BY post_id DESC
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) subquery
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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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//received +=(
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//string.Format(
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//"#{0}: {1}" + "\n",
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// reader.GetInt32(0).ToString(),
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//reader.GetString(1)
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//)
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//);
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Post receivedPost = new()
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{
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Date = DateTime.Now,
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Id = reader.GetInt32(0),
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Text = reader.GetString(1)
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};
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posts.Add(receivedPost);
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//posts[postCount] = receivedPost;
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//postCount++;
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}
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reader.Close();
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}
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}
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return posts;
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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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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 SendPost(Post postToSend)
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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(@"
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INSERT INTO dvach " + @"(post_id, post)
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VALUES (DEFAULT, @postText)", conn))
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{
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command.Parameters.AddWithValue("postText", postToSend.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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