C#•3y ago

network upload and download speed using System.Net.NetworkInformation package in .net core

the below is my code i've tried using System.Net.NetworkInformation libraray.


using System.Net.NetworkInformation;

var interfaces = NetworkInterface.GetAllNetworkInterfaces();

foreach (var networkInterface in interfaces)
    if (networkInterface.OperationalStatus == OperationalStatus.Up &&
        networkInterface.NetworkInterfaceType != NetworkInterfaceType.Loopback &&
        networkInterface.NetworkInterfaceType != NetworkInterfaceType.Tunnel &&
        networkInterface.NetworkInterfaceType != NetworkInterfaceType.Unknown && !networkInterface.IsReceiveOnly)
    {
        Console.WriteLine($"Monitoring network speed for interface: {networkInterface.Name}");
        var bytesSent = networkInterface.GetIPv4Statistics().BytesSent;
        var bytesReceived = networkInterface.GetIPv4Statistics().BytesReceived;
        long uploadSpeed = CalculateSpeed(bytesSent);
        long downloadSpeed = CalculateSpeed(bytesReceived);

        Console.WriteLine($"Bytes Sent: {bytesSent} bytes | Bytes Received: {bytesReceived} bytes");
        Console.WriteLine($"Upload Speed: {uploadSpeed} Mbps | Download Speed: {downloadSpeed} Mbps");
    }

Console.ReadKey();

static long CalculateSpeed(long bytes)
{
    const double bytesToMegabits = 8.0 / (1000 * 1000);
    return (long)(bytes * bytesToMegabits);
}


using System.Net.NetworkInformation;

var interfaces = NetworkInterface.GetAllNetworkInterfaces();

foreach (var networkInterface in interfaces)
    if (networkInterface.OperationalStatus == OperationalStatus.Up &&
        networkInterface.NetworkInterfaceType != NetworkInterfaceType.Loopback &&
        networkInterface.NetworkInterfaceType != NetworkInterfaceType.Tunnel &&
        networkInterface.NetworkInterfaceType != NetworkInterfaceType.Unknown && !networkInterface.IsReceiveOnly)
    {
        Console.WriteLine($"Monitoring network speed for interface: {networkInterface.Name}");
        var bytesSent = networkInterface.GetIPv4Statistics().BytesSent;
        var bytesReceived = networkInterface.GetIPv4Statistics().BytesReceived;
        long uploadSpeed = CalculateSpeed(bytesSent);
        long downloadSpeed = CalculateSpeed(bytesReceived);

        Console.WriteLine($"Bytes Sent: {bytesSent} bytes | Bytes Received: {bytesReceived} bytes");
        Console.WriteLine($"Upload Speed: {uploadSpeed} Mbps | Download Speed: {downloadSpeed} Mbps");
    }

Console.ReadKey();

static long CalculateSpeed(long bytes)
{
    const double bytesToMegabits = 8.0 / (1000 * 1000);
    return (long)(bytes * bytesToMegabits);
}

output is:

Monitoring network speed for interface: Wi-Fi
Bytes Sent: 46381565 bytes | Bytes Received: 1586958802 bytes
Upload Speed: 371 Mbps | Download Speed: 12695 Mbps

cap5lut•12/12/23, 11:58 AM

u are calculating the speed wrong, and is the total amount of bytes it received/sent since the network connection was established.
to calculate the speed u would have to get the numbers, wait some seconds, get the numbers again and from the difference/seconds u waited u get the bytes/sec for that time

cap5lut•12/12/23, 11:59 AM

(assuming that ur question is why have have such weirdly high speed numbers)

SuzzOP•12/12/23, 12:04 PM

SuzzOP•12/12/23, 12:10 PM

are there any methods available in System.Net.NetworkInformation like

networkInterface.GetIPv4Statistics().BytesSent;
networkInterface.GetIPv4Statistics().BytesReceived;

my requirement is i need to get the upload and download speed on a single button click. are there any ways to do that?

SuzzOP•12/12/23, 12:15 PM

the workflow is like that

i have a wpf application which have to calculate the upload and downlaod speed of the system. and i have an asp.netcore application, which have a get api. i'm using signalr callback to the wpf application from the asp.net core on the get api called. so there is not much time for me to wait.

SuzzOP•12/12/23, 12:17 PM

also my requirement is to use any dotnet packages to retrieve the network speed. i've tried to use the LibreHardwareMonitorpackage. but it needs admin privilege to get the sensor values. the uat should need, thats not possible for my case

cap5lut•12/12/23, 12:30 PM

[..] speed of the system

which system is meant here? the local machine or the server?
if its regarding the server then the will not help much as u can not differentiate between data I/O to the server or other servers

cap5lut•12/12/23, 12:35 PM

but generally speaking there are 2 ways to measure, either u send/receive a specific amount of data and measure how long that takes, or u send/receive as much of data in a specific time frame.
the more data/the longer the time frame, the more accurate this becomes

SuzzOP•12/12/23, 12:39 PM

which system is meant here? the local machine or the server?
the local machine, where the wpf application is

cap5lut•12/12/23, 12:47 PM

well, u would in either way send some data to some server to get the upload speed/download some data to get the download speed
eg if u have some kind of echo endpoint, u could
1) prepare a http post request with a body of 10mb data
2) store how many bytes the interface has sent so far
3) start a stopwatch
4) send the request with

HttpCompletionOption.ResponseHeadersRead

HttpCompletionOption.ResponseHeadersRead

5) store how many bytes the interface sent
6) store the elapsed time
7) store the received bytes
8) consume the response body
9) store the received bytes
10) store the elapsed time

cap5lut•12/12/23, 12:48 PM

can also be less than 10mb data, but as said as smaller the time frame as less accurate it is

cap5lut•12/12/23, 12:50 PM

with 2) and 5) u know how much bytes the local machine sent, with 6) u know how long it took to send these bytes
with 7) and 9) u know how much bytes the local machine received and with 6) and 10) u know how long it took to receive these bytes

SuzzOP•12/12/23, 1:08 PM

ok, thankyou for the help

cap5lut•12/12/23, 1:13 PM

i dunno much about signalr, but u could probably also use that instead of http requests

SuzzOP•12/12/23, 1:16 PM

thats ok, i wanted to use dontnet package instead of doing pings or socket. the requirement is like that. thats why i tried to use the System.Net.NetworkInformation