【发布时间】：2018-04-17 20:13:11
【问题描述】：
我是 ASP.NET 的新手，我正在尝试在网络上制作一个聊天应用程序。 我使用 System.Net.Sockets 在服务器和客户端之间进行通信。使用当前版本的应用程序，我可以将数据从客户端发送到服务器，并将数据从服务器发送到客户端。客户端通过线程获取数据，线程在其中有一个循环来连续获取数据。问题是我从服务器到客户端获取数据，并且它被添加到列表框项目中，但它没有显示列表框中的数据。我认为问题是因为使用了线程或循环。
客户代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net.Sockets;
using System.Net;
using System.Threading;
using System.Windows.Forms;
namespace Client_s__Web_2
{
public partial class WebForm1 : System.Web.UI.Page
{
static int port = 13000;
static string IpaAddress = "127.0.0.1";
static Socket ClientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
static IPEndPoint ep = new IPEndPoint(IPAddress.Parse(IpaAddress), port);
static string client_ismi = "";
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
ClientSocket.Connect(ep);
ListBox1.Items.Add("Client is connected.");
byte[] isim = new byte[1024];
int size = ClientSocket.Receive(isim);
client_ismi = System.Text.Encoding.ASCII.GetString(isim, 0, size);
Response.Redirect("WebForm1.aspx");
ListBox1.Items.Add("The name that server has given: " + client_ismi);
System.Windows.Forms.Form.CheckForIllegalCrossThreadCalls = false;
ThreadStart st = new ThreadStart(get_data);
Thread thread = new Thread(st);
thread.Start();
}
public void get_data()
{
while (true)
{
byte[] MsgFromServer = new byte[1024];
int size1 = ClientSocket.Receive(MsgFromServer);
ListBox1.Items.Add("Server: " + System.Text.Encoding.ASCII.GetString(MsgFromServer, 0, size1));
}
}
protected void Button2_Click(object sender, EventArgs e)
{
string messageFromClient = null;
messageFromClient = client_ismi + ": " + TextBox1.Text;
TextBox1.Text = "";
ClientSocket.Send(System.Text.Encoding.ASCII.GetBytes(messageFromClient), 0, messageFromClient.Length, SocketFlags.None);
}
}
}
客户代码 Aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="Client_s__Web_2.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Panel ID="Panel1" runat="server" DefaultButton = "Button2">
<table>
<tr>
<td>
</td>
<td>
<asp:Button ID="Button1" runat="server" Text="Start" OnClick="Button1_Click" />
</td>
</tr>
<tr>
<td>
<asp:ListBox ID="ListBox1" runat="server" Width ="700px" Height="500px"></asp:ListBox>
</td>
<td>
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="TextBox1" runat="server" Width ="700px" Height="50px"></asp:TextBox>
</td>
<td>
<asp:Button ID="Button2" runat="server" Text="Send" OnClick="Button2_Click" />
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button ID="Button3" runat="server" Text="Refresh" OnClick="Button3_Click" />
</td>
</tr>
</table>
</asp:Panel>
</div>
</form>
</body>
</html>
服务器代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
using System.Threading;
namespace Main_Server
{
class Program
{
static List<string> names = new List<string>();
static List<Socket> clients = new List<Socket>();
static Program p = new Program();
static int counter = 0;
static void Main(string[] args)
{
int port = 13000;
string IpAddress = "127.0.0.1";
Socket ServerListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(IPAddress.Parse(IpAddress), port);
ServerListener.Bind(ep);
ServerListener.Listen(100);
Console.WriteLine("Server is listening");
Socket ClientSocket = default(Socket);
while(true)
{
counter++;
ClientSocket = ServerListener.Accept();
clients.Add(ClientSocket);
string msgstr = "Guest_" + Convert.ToString(counter);
names.Add(msgstr);
byte[] msg = Encoding.ASCII.GetBytes(msgstr);
int size = msg.Length;
ClientSocket.Send(msg, 0, size, SocketFlags.None);
Console.WriteLine(msgstr + " has connected");
Thread UserThread = new Thread(new ThreadStart(() => p.User(counter - 2, msgstr)));
UserThread.Start();
}
}
public void User(int bulunan_client,string username)
{
while (true)
{
byte[] msg = new byte[1024];
int size = clients[bulunan_client].Receive(msg);
try
{
if (System.Text.Encoding.ASCII.GetString(msg, 0, size).Substring(System.Text.Encoding.ASCII.GetString(msg, 0, size).Length - 10) == "disconnect")
{
names.Remove(names[bulunan_client]);
clients.Remove(clients[bulunan_client]);
Console.WriteLine(username + " has disconnected.");
counter--;
break;
}
else if (System.Text.Encoding.ASCII.GetString(msg, 0, size).Substring(System.Text.Encoding.ASCII.GetString(msg, 0, size).Length - 7) == "connect")
{
string sending_names = "";
for (int i = 0; i < names.Count; i++)
{
sending_names += (names[i] + " ");
}
clients[bulunan_client].Send(System.Text.Encoding.ASCII.GetBytes(sending_names), 0, (System.Text.Encoding.ASCII.GetBytes(sending_names)).Length, SocketFlags.None);
continue;
}
}
catch
{
break;
}
Console.WriteLine(System.Text.Encoding.ASCII.GetString(msg,0,size));
}
}
}
}
注意：当我从客户端发送“连接”时，我应该得到连接客户端的名称。我让它们进入列表框项目，但它们没有显示。我用windows窗体应用程序做了这个程序，我对listbox完全没有任何问题。
谢谢你们的帮助:)
【问题讨论】：
标签： c# asp.net multithreading listbox listboxitem