Программа по оптимизации передачи данных через сервер

            if (clientPanels.Values[index] != null)

            {

                Controls.Remove(clientPanel);

                clientPanel = clientPanels.Values[index];

                Controls.Add(clientPanel);

            }

            else

            {

                var panel = new ClientPanel(clientPanel, clientInfo);

                panel.Tag = listViewClients.SelectedItems[0].Tag;

                clientPanels[clientInfo] = panel;

                Controls.Remove(clientPanel);

                clientPanel = panel;

                Controls.Add(clientPanel);

            }

        }

 

//при выходе закрываем  сокеты, чтоб не висели

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)

        {

            NetClient.Stop();

        }

 

        #endregion

 

        #region internal

 

        private void ShowSaveFileDialog(ClientInfo clientInfo, string fname)

        {

            InvokeCall(this, () =>

                {

                    var dialog = new SaveFileDialog();

                    dialog.Title = @"Входящий файл от " + clientInfo.Name;

                    dialog.FileName = fname;

                    if (dialog.ShowDialog() == DialogResult.OK)

                    {

                        receiveFile = true;

                        if (File.Exists(dialog.FileName))

                           File.Delete(dialog.FileName);

                        receiveFileName = dialog.FileName;

                    }

                });

        }

 

        private void ProcessClientList(List<ClientInfo> clientList)

        {

            if (clientList == null)

                return;

 

            foreach (ClientInfo client in clientList)

            {

                int index = clientPanels.IndexOfKey(client);

                if (index < 0)

                    clientPanels.Add(client, null);

                else

                    clientPanels.Keys[index].IsAlive = client.IsAlive;

            }

            UpdateListViewItems();

        }

 

//если изменилась информация о доступности клиентов - то обновляем клиент-лист на форме

        private void UpdateListViewItems()

        {

            var clientItems = new List<ListViewItem>();

            foreach (var client in clientPanels)

            {

                var item = new ListViewItem();

                item.Tag = client.Key;

                item.Text = client.Key.Name;

                item.Group = client.Key.IsAlive

                                 ? listViewClients.Groups["Online"]

                                 : listViewClients.Groups["Offline"];

                clientItems.Add(item);

            }

            InvokeCall(listViewClients, () => listViewClients.Items.Clear());

            InvokeCall(listViewClients, () => listViewClients.Items.AddRange(clientItems.ToArray()));

        }

 

        private void InvokeCall(Control control, Action action)

        {

            if (control.InvokeRequired)

                Invoke(action);

            else

                action();

        }

 

        #endregion

 

        private void Form1_Load(object sender, EventArgs e)

        {

 

        }

    }

}

 

Приложение 3. Настройки клиента Settings.cs

using System;

using System.IO;

using System.Text;

using System.Windows.Forms;

using System.Xml;

 

namespace Client

{

    static class Settings

    {

        public static int MessagePort = 10000;

        public static int FilePort = MessagePort + 1;

        public static string ServerHost = "localhost";

        public static int ServerPort = 9999;

        public static string Name = "Client";

 

        private static string fname = Environment.CurrentDirectory + "\\Settings.xml";

 

//ищет файл настроек, если он найден - то пытается  их загрузить.

//если загрузка  неуспешна, то остаются значения  по умолчанию

        static Settings()

        {

            if (!File.Exists(fname))

            {

                //создаем настройки по умолчанию

                Save();

                return;

            }

               

            try

            {

                using (XmlTextReader reader = new XmlTextReader(fname))

                {

                    reader.WhitespaceHandling = WhitespaceHandling.None;

                    while (reader.Read())

                    {

                        if (reader.NodeType == XmlNodeType.Element)

                            if (reader.Name.Equals("Settings", StringComparison.OrdinalIgnoreCase))

                                while (reader.Read())

                                {

                                    if (reader.IsStartElement("MessagePort"))

                                    {

                                        string value = reader.ReadString();

                                        int port = MessagePort;

                                        if (int.TryParse(value, out port))

                                            MessagePort = port;

                                    }

                                    else if (reader.IsStartElement("FilePort"))

                                    {

                                        string value = reader.ReadString();

                                        int port = FilePort;

                                        if (int.TryParse(value, out port))

                                            FilePort = port;

                                    }

                                    else if (reader.IsStartElement("Name"))

                                    {

                                        string value = reader.ReadString();

                                        if (!string.IsNullOrEmpty(value) && !string.IsNullOrWhiteSpace(value))

                                            Name = value;

                                    }

                                    else if (reader.IsStartElement("Server"))

                                    {

                                        while (reader.Read())

                                        {

                                            if (reader.IsStartElement("ServerHost"))

                                                ServerHost = reader.ReadString();

                                            else if (reader.IsStartElement("ServerPort"))

                                            {

                                                string value = reader.ReadString();

                                                int port = ServerPort;

                                                if (int.TryParse(value, out port))

                                                    ServerPort = port;

                                            }

                                        }

                                    }

                                }

                    }

                }

            }

            catch

            {

                MessagePort = 10000;

                FilePort = MessagePort + 1;

                ServerHost = "localhost";

                ServerPort = 9999;

                MessageBox.Show(@"Проверьте файл настроек, загружены настройки по умолчанию", @"Ошибка",

                                MessageBoxButtons.OK, MessageBoxIcon.Error);

            }

        }

 

        // сохраняет все измененные настройки в XML

public static void Save()

        {

            try

            {

                using (XmlWriter writer = new XmlTextWriter(fname, new UTF8Encoding()))

                {

                    writer.WriteStartDocument();

                    writer.WriteStartElement("Settings");

                    writer.WriteElementString("MessagePort", MessagePort.ToString());

                    writer.WriteElementString("FilePort", FilePort.ToString());

                    writer.WriteElementString("Name", Name);

                    writer.WriteStartElement("Server");

                    writer.WriteElementString("ServerHost", ServerHost);

                    writer.WriteElementString("ServerPort", FilePort.ToString());

                    writer.WriteEndElement();

                    writer.WriteEndElement();

                }

            }

            catch (Exception e)

            {

                MessageBox.Show(@"Ошибка сохранения настроек!" + Environment.NewLine + e.Message, @"Ошибка",

                                MessageBoxButtons.OK, MessageBoxIcon.Error);

            }

        }

 

    }

 

}

¹ http://ru.wikipedia.org/wiki/TCP/IP

² http://ru.wikipedia.org/wiki/TCP/IP

³ http://www.ixbt.com/comm/tech-fast-ethernet.shtml

⁴ http://ru.wikipedia.org/wiki

⁵ http://www.csharpblog.ru/node/49

⁶ http://ru.wikipedia.org/wiki/C_Sharp

Воронеж 2013