C# WebSocket实现
我想创建一个WebSocket示例,其中我不想刷新页面以获取最新数据 我创建了一个Html页面,其中创建了websocket的一个对象 例如 客户端实现 服务器端实现 我使用WebSocket的方式正确吗 请帮我清理一下这一部分。这是一个示例C# WebSocket实现,c#,asp.net,api,websocket,C#,Asp.net,Api,Websocket,我想创建一个WebSocket示例,其中我不想刷新页面以获取最新数据 我创建了一个Html页面,其中创建了websocket的一个对象 例如 客户端实现 服务器端实现 我使用WebSocket的方式正确吗 请帮我清理一下这一部分。这是一个示例 首先,您必须安装Asp.net signal软件包及其依赖项。 应用程序启动时,您已呼叫信号器 namespace ABC { public partial class Startup { public void Confi
首先,您必须安装
Asp.net signal
软件包及其依赖项。应用程序启动时,您已呼叫信号器
namespace ABC
{
public partial class Startup
{
public void Configuration(IAppBuilder app)
{
ConfigureAuth(app);
app.MapSignalR(); <--{Add this line}
}
}
}
您必须创建自定义Hubclass
扩展Hub基类
public class MessagesHub : Hub
{
[HubMethodName("sendMessages")]
public void SendMessages()
{
IHubContext context = GlobalHost.ConnectionManager.GetHubContext<MessagesHub>();
context.Clients.All.updateMessages();
}
}
当数据库表中有任何更改时,服务器使用sqlDependency
getAllMessages()
是代码要处理的控制器,应该显示在查看页面中,当应用程序启动以及数据库中的任何更改时,它将被调用
public ActionResult GetNotificationMessages()
{
NotificationRepository notification = new NotificationRepository();
return PartialView("_NotificationMessage");
}
在模型中
类
public class NotificationRepository
{
readonly string connectionString = ConfigurationManager.ConnectionStrings["InexDbContext"].ConnectionString;
public IEnumerable<Notification> GetAllMessages(string userId)
{
var messages = new List<Notification>();
using(var connection = new SqlConnection(connectionString))
{
connection.Open();
using (var command = new SqlCommand(@"SELECT [NotificationID], [Message], [NotificationDate], [Active], [Url], [userId] FROM [dbo].[Notifications] WHERE [Active] = 1 AND [userId] ='" + userId + "'", connection))
{
command.Notification = null;
var dependency = new SqlDependency(command);
dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
if (connection.State == ConnectionState.Closed)
{
connection.Open();
}
var reader = command.ExecuteReader();
while (reader.Read())
{
messages.Add(item: new Notification { NotificationID = (int)reader["NotificationID"], Message = (string)reader["Message"], Url = (string)reader["Url"] });
}
}
}
return messages;
}
private void dependency_OnChange(object sender, SqlNotificationEventArgs e)
{
if (e.Type == SqlNotificationType.Change)
{
MessagesHub message = new MessagesHub();
message.SendMessages();
}
}
}
公共类通知存储库
{
只读字符串connectionString=ConfigurationManager.connectionString[“inXdbContext”]。connectionString;
公共IEnumerable GetAllMessages(字符串用户ID)
{
var messages=新列表();
使用(var连接=新的SqlConnection(connectionString))
{
connection.Open();
使用(var command=new SqlCommand(@“从[dbo].[NotificationID]、[Message]、[NotificationDate]、[Active]、[Url]、[userId]中选择[NotificationID]。[Notifications],其中[Active]=1和[userId]=“+userId+”,连接))
{
command.Notification=null;
var-dependency=newsqldependency(命令);
dependency.OnChange+=新的OnChangeEventHandler(dependency\u OnChange);
if(connection.State==ConnectionState.Closed)
{
connection.Open();
}
var reader=command.ExecuteReader();
while(reader.Read())
{
添加(项目:新通知{NotificationID=(int)读卡器[“NotificationID”]、消息=(字符串)读卡器[“Message”]、Url=(字符串)读卡器[“Url”});
}
}
}
返回消息;
}
private void dependency_OnChange(对象发送方,SqlNotificationEventArgs e)
{
if(e.Type==SqlNotificationType.Change)
{
MessagesHub message=newmessageshub();
message.SendMessages();
}
}
}
当数据库表
更新时,这很好地显示了最新的数据。消息将在运行时显示。
希望这对你有所帮助你走上了正确的道路
如果我没有迟到,你可以参考这个……这是一个有效的例子
客户端
在服务器端添加以下类
public class MicrosoftWebSockets : WebSocketHandler
{
private static WebSocketCollection clients = new WebSocketCollection();
private string msg;
public override void OnOpen()
{
this.msg = this.WebSocketContext.QueryString["username"];
clients.Add(this);
clients.Broadcast(msg);
}
public override void OnMessage(string message)
{
clients.Broadcast(string.Format(message));
}
public override void OnClose()
{
clients.Remove(this);
clients.Broadcast(string.Format(msg));
}
将此dll添加到上述类
使用Microsoft.Web.WebSockets
我不记得我是从哪里得到参考的……但是上面的代码是从我当前的工作应用程序中派生出来的是否出现了错误这种web套接字实现方式是正确的?你的确切要求是什么?安南,我只想澄清一下我的WebSocket功能实现是否正确,是否可以在不刷新的情况下获取最新数据。我不知道如何澄清他的问题,所以我放了一个简单的程序让他理解你完整地复制了一些教程,没有回答OP的问题。你知道他的实现是半生不熟的
$(function () {
// Declare a proxy to reference the hub.
var notifications = $.connection.messagesHub;
//debugger;
// Create a function that the hub can call to broadcast messages.
notifications.client.updateMessages = function () {
getAllMessages()
};
// Start the connection.
$.connection.hub.start().done(function () {
getAllMessages();
}).fail(function (e) {
alert(e);
});
});
function getAllMessages() {
$.ajax({
url: '../../Notifications/GetNotificationMessages',
.
.
}
public ActionResult GetNotificationMessages()
{
NotificationRepository notification = new NotificationRepository();
return PartialView("_NotificationMessage");
}
public class NotificationRepository
{
readonly string connectionString = ConfigurationManager.ConnectionStrings["InexDbContext"].ConnectionString;
public IEnumerable<Notification> GetAllMessages(string userId)
{
var messages = new List<Notification>();
using(var connection = new SqlConnection(connectionString))
{
connection.Open();
using (var command = new SqlCommand(@"SELECT [NotificationID], [Message], [NotificationDate], [Active], [Url], [userId] FROM [dbo].[Notifications] WHERE [Active] = 1 AND [userId] ='" + userId + "'", connection))
{
command.Notification = null;
var dependency = new SqlDependency(command);
dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
if (connection.State == ConnectionState.Closed)
{
connection.Open();
}
var reader = command.ExecuteReader();
while (reader.Read())
{
messages.Add(item: new Notification { NotificationID = (int)reader["NotificationID"], Message = (string)reader["Message"], Url = (string)reader["Url"] });
}
}
}
return messages;
}
private void dependency_OnChange(object sender, SqlNotificationEventArgs e)
{
if (e.Type == SqlNotificationType.Change)
{
MessagesHub message = new MessagesHub();
message.SendMessages();
}
}
}
var ws;
var username = "JOHN";
function startchat() {
var log= $('log');
var url = 'ws://<server path>/WebSocketsServer.ashx?username=' + username;
ws = new WebSocket(url);
ws.onerror = function (e) {
log.appendChild(createSpan('Problem with connection: ' + e.message));
};
ws.onopen = function () {
ws.send("I am Active-" +username);
};
ws.onmessage = function (e) {
if (e.data.toString() == "Active?") {
ws.send("I am Active-" + username);
}
else {
}
};
ws.onclose = function () {
log.innerHTML = 'Closed connection!';
};
}
</script>
<div id="log">
</div>
public void ProcessRequest(HttpContext context)
{
if (context.IsWebSocketRequest)
{
context.AcceptWebSocketRequest(new MicrosoftWebSockets());
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
public class MicrosoftWebSockets : WebSocketHandler
{
private static WebSocketCollection clients = new WebSocketCollection();
private string msg;
public override void OnOpen()
{
this.msg = this.WebSocketContext.QueryString["username"];
clients.Add(this);
clients.Broadcast(msg);
}
public override void OnMessage(string message)
{
clients.Broadcast(string.Format(message));
}
public override void OnClose()
{
clients.Remove(this);
clients.Broadcast(string.Format(msg));
}