帶寬監控系統

Question

我試圖監控我的互聯網連接的流量，即給定時間的平均速度，以獲得平均速度。我試過這個代碼，但它不工作。我哪裏出錯了？

Function bwmonitor() 
    Dim pc As New PerformanceCounterCategory("Network Interface") 
    Dim instance As String = pc.GetInstanceNames(0) 
    Dim bs As New PerformanceCounter("Network Interface", "Bytes Sent/sec", instance) 
    Dim br As New PerformanceCounter("Network Interface", "Bytes Received/Sec", instance) 
    Dim k As Integer = 0 

    Do 
     k = k + 1 
     Dim kbsent As Integer = bs.NextValue()/1024 
     Dim kbRecieved As Integer = br.NextValue/1024 
     TextBox10.Text = kbsent 
     TextBox11.Text = kbRecieved 
     Threading.Thread.Sleep(1000) 
    Loop Until k = 10 

    Return 0 
End Function 

我已經調用函數，但文本框只返回零。

Answer 1

您需要找到您使用的網絡接口，使用下面的代碼創建控制檯應用程序，並且您將能夠看到哪個接口處於活動狀態。

此外，您將無法以這種方式更新UI，您需要使用後臺工作人員在文本框中進行滾動更新。

Sub Main() 

Dim networkInterfaces As New System.Diagnostics.PerformanceCounterCategory("Network Interface") 
    Dim nics As String() = networkInterfaces.GetInstanceNames() 
    Dim bytesSent(nics.Length - 1) As System.Diagnostics.PerformanceCounter 
    Dim bytesReceived(nics.Length - 1) As System.Diagnostics.PerformanceCounter 
    Dim i As Integer 
    For i = 0 To nics.Length - 1 
    bytesSent(i) = New System.Diagnostics.PerformanceCounter("Network Interface", "Bytes Sent/sec", nics(i), True) 
    bytesReceived(i) = New System.Diagnostics.PerformanceCounter("Network Interface", "Bytes received/sec", nics(i), True) 
Next 
    'Dim ni As System.Diagnostics.PerformanceCounter 
For i = 0 To nics.Length - 1 
    System.Console.WriteLine(String.Format("  interface {0}: {1} ", i, nics(i))) 
Next 
Do 
     For i = 0 To nics.Length - 1 
      System.Console.WriteLine(String.Format("  interface {0}: {1} bytes sent/sec, {2} bytes received/sec. ", i, bytesSent(i).NextValue, bytesReceived(i).NextValue)) 
     Next 

     System.Console.WriteLine("") 
     System.Console.WriteLine("") 
     System.Threading.Thread.Sleep(3000) 
Loop 

End Sub