C# 用C语言检查网络状态#
如何检查我是否有开放的网络连接,以及是否可以联系c#中的特定ip地址?我在VB.Net中看到过一个示例,但它们都使用“我的”结构。C# 用C语言检查网络状态#,c#,.net,network-programming,C#,.net,Network Programming,如何检查我是否有开放的网络连接,以及是否可以联系c#中的特定ip地址?我在VB.Net中看到过一个示例,但它们都使用“我的”结构。 谢谢。好吧,您可以尝试连接到特定的ip,并处理拒绝和超时 查看System.Net.Sockets命名空间中的TcpClient类。第一个建议(IP连接) 您可以尝试使用以下方式连接到IP地址: IPEndPoint ipep = new IPEndPoint(Ipaddress.Parse("IP TO CHECK"), YOUR_PORT_I
谢谢。好吧,您可以尝试连接到特定的ip,并处理拒绝和超时 查看System.Net.Sockets命名空间中的TcpClient类。第一个建议(IP连接) 您可以尝试使用以下方式连接到IP地址:
IPEndPoint ipep = new IPEndPoint(Ipaddress.Parse("IP TO CHECK"), YOUR_PORT_INTEGER);
Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
server.Connect(ipep);
我建议您检查“聊天”程序的代码。这些程序操纵大量的IP连接,并将使您了解如何检查IP是否可用
第二项建议(平)
你可以试试打乒乓球。这是一个好主意。您只需执行以下操作:
Ping netMon = new Ping();
PingResponse response = netMon.PingHost(hostname, 4);
if (response != null)
{
ProcessResponse(response);
}
如果您对HTTP状态代码感兴趣,以下代码可以正常工作:
using System;
using System.Net;
class Program {
static void Main () {
HttpWebRequest req = WebRequest.Create(
"http://www.oberon.ch/") as HttpWebRequest;
HttpWebResponse rsp;
try {
rsp = req.GetResponse() as HttpWebResponse;
} catch (WebException e) {
if (e.Response is HttpWebResponse) {
rsp = e.Response as HttpWebResponse;
} else {
rsp = null;
}
}
if (rsp != null) {
Console.WriteLine(rsp.StatusCode);
}
}
}
如果您只想检查网络是否正常,请使用:
bool networkUp
= System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();
要检查特定界面的状态(或其他信息),请使用:
要检查远程计算机的状态,则必须连接到该计算机(请参阅其他答案)如果要监视状态的变化,请使用事件:
我的想法是使用一个静态类/模块来监视spereate线程。一个简单的DNS解析将确保您的网络是否正常运行。比斯平
Imports System.Net
Public Module Network_Monitor
Private InsideWorkNet As Boolean = vbFalse
Private Online_Status As Boolean = vbFalse
Private CurrentWorkIPAddress As New IPHostEntry
Private WithEvents Timer_Online_Check As New Timers.Timer With {.Interval = 5000, .Enabled = True, .AutoReset = True}
Public ReadOnly Property GetOnlineStatus() As String
Get
Return Online_Status
End Get
End Property
Public Sub Initialize()
Set_Online_Status()
Timer_Online_Check.Start()
End Sub
Public Sub Set_Online_Status()
If My.Computer.Network.IsAvailable Then
Try
Dim DNSTest As IPHostEntry = Dns.GetHostEntry("google.com")
If DNSTest.AddressList.Length > 0 Then
Online_Status = True
Else : Online_Status = False
End If
Catch ex As System.Net.Sockets.SocketException
Online_Status = False
End Try
End If
End Sub
Private Sub Timer_Online_Check_Elaspsed(ByVal sender As Object, ByVal e As Timers.ElapsedEventArgs) Handles Timer_Online_Check.Elapsed
Set_Online_Status()
End Sub
Public Sub Detect_Work_Network()
If Online_Status = True Then
Dim WorkIP As IPHostEntry = New IPHostEntry()
Try
WorkIP = Dns.GetHostEntry("serverA.myworkdomain.local")
If WorkIP.AddressList.Length > 0 Then
InsideWorkNet = True
CurrentWorkIPAddress = WorkIP
'MessageBox.Show(WorkIP.HostName.ToString(), "WorkIP", MessageBoxButtons.OK, MessageBoxIcon.Information)
End If
Catch ex As Sockets.SocketException
Try
WorkIP = Dns.GetHostEntry("serverA.myworkdomain.com")
If WorkIP.AddressList.Length > 0 Then
InsideWorkNet = False
CurrentWorkIPAddress = WorkIP
' MessageBox.Show(WorkIP.HostName.ToString(), "WorkIP", MessageBoxButtons.OK, MessageBoxIcon.Information)
End If
Catch ey As Sockets.SocketException
End Try
End Try
End If
End Sub
Public Function GetWorkServerName() As String
If InsideWorkNet = True Then
Return "serverA.myworkdomain.local"
Else : Return "serverA.myworkdomain.com"
End If
End Function
End Module
我还必须确定自己是在工作网络之内还是之外。防火墙两侧的不同服务器供应用程序通话。您可以使用
if(System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable())
{
//Do your stuffs when network available
}
else
{
//Do stuffs when network not available
}
谢谢你的建议。ping类非常有用。ping数据包(ICMP回显请求)通常会被防火墙阻止,因此在这种情况下,使用这种方法测试防火墙另一端服务器的可用性将失败。
Imports System.Net
Public Module Network_Monitor
Private InsideWorkNet As Boolean = vbFalse
Private Online_Status As Boolean = vbFalse
Private CurrentWorkIPAddress As New IPHostEntry
Private WithEvents Timer_Online_Check As New Timers.Timer With {.Interval = 5000, .Enabled = True, .AutoReset = True}
Public ReadOnly Property GetOnlineStatus() As String
Get
Return Online_Status
End Get
End Property
Public Sub Initialize()
Set_Online_Status()
Timer_Online_Check.Start()
End Sub
Public Sub Set_Online_Status()
If My.Computer.Network.IsAvailable Then
Try
Dim DNSTest As IPHostEntry = Dns.GetHostEntry("google.com")
If DNSTest.AddressList.Length > 0 Then
Online_Status = True
Else : Online_Status = False
End If
Catch ex As System.Net.Sockets.SocketException
Online_Status = False
End Try
End If
End Sub
Private Sub Timer_Online_Check_Elaspsed(ByVal sender As Object, ByVal e As Timers.ElapsedEventArgs) Handles Timer_Online_Check.Elapsed
Set_Online_Status()
End Sub
Public Sub Detect_Work_Network()
If Online_Status = True Then
Dim WorkIP As IPHostEntry = New IPHostEntry()
Try
WorkIP = Dns.GetHostEntry("serverA.myworkdomain.local")
If WorkIP.AddressList.Length > 0 Then
InsideWorkNet = True
CurrentWorkIPAddress = WorkIP
'MessageBox.Show(WorkIP.HostName.ToString(), "WorkIP", MessageBoxButtons.OK, MessageBoxIcon.Information)
End If
Catch ex As Sockets.SocketException
Try
WorkIP = Dns.GetHostEntry("serverA.myworkdomain.com")
If WorkIP.AddressList.Length > 0 Then
InsideWorkNet = False
CurrentWorkIPAddress = WorkIP
' MessageBox.Show(WorkIP.HostName.ToString(), "WorkIP", MessageBoxButtons.OK, MessageBoxIcon.Information)
End If
Catch ey As Sockets.SocketException
End Try
End Try
End If
End Sub
Public Function GetWorkServerName() As String
If InsideWorkNet = True Then
Return "serverA.myworkdomain.local"
Else : Return "serverA.myworkdomain.com"
End If
End Function
End Module
if(System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable())
{
//Do your stuffs when network available
}
else
{
//Do stuffs when network not available
}