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C# || How To Get The Computer & User Client IP Address Using C#

May 13, 2021 admin No comments

The following is a module with functions which demonstrates how to get the computers and user client request IPv4 IP address using C#.

The function demonstrated on this page returns the IPv4 address of the calling user. When under a web environment, it returns the clients System.Web.HttpContext.Current.Request IP address, otherwise it returns the IP address of the local machine (i.e: server) if there is no request.

The following function uses System.Web to determine the IP address of the client.

Note: To use the function in this module, make sure you have a reference to ‘System.Web‘ in your project.

One way to do this is, in your Solution Explorer (where all the files are shown with your project), right click the ‘References‘ folder, click ‘Add Reference‘, then type ‘System.Web‘ in the search box, and add the reference titled System.Web in the results Tab.

1. Get IP Address

The example below demonstrates the use of ‘Utils.Methods.GetIPv4Address‘ to get the IPv4 address of the calling user.





		
		
			1. Get IP Address
			
C#
			
			// Get IP Address

// Get IP address of the current user
var ipAddress = Utils.Methods.GetIPv4Address();

Console.WriteLine($"IP Address: {ipAddress}");

// example output:
/*
    IP Address: 192.168.0.5 
*/
			
				
					
				
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						// Get IP Address
 
// Get IP address of the current user
var ipAddress = Utils.Methods.GetIPv4Address();
 
Console.WriteLine($"IP Address: {ipAddress}");
 
// example output:
/*
    IP Address: 192.168.0.5 
*/

2. Utils Namespace

The following is the Utils Namespace. Include this in your project to start using!





		
		
			Utils Namespace
			
C#
			
			// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 13, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Utils.cs
//    Description: Handles general utility functions
// ============================================================================
using System;
using System.Linq;

namespace Utils {
    public static class Methods {
        /// <summary>
        /// Returns the IPv4 address of the calling user. When under a web
        /// environment, returns the <see cref="System.Web.HttpRequest"/> 
        /// IP address, otherwise returns the IP address of the local machine
        /// </summary>
        /// <returns>The IPv4 address of the calling user</returns>
        public static string GetIPv4Address() {
            var ipAddress = string.Empty;

            // Get client ip address
            if (System.Web.HttpContext.Current != null 
                && System.Web.HttpContext.Current.Request != null) {

                // Get client ip address using ServerVariables
                var request = System.Web.HttpContext.Current.Request;
                ipAddress = request.ServerVariables["HTTP_X_FORWARDED_FOR"];
                if (!string.IsNullOrEmpty(ipAddress)) {
                    var addresses = ipAddress.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                    if (addresses.Length > 0) {
                        ipAddress = addresses[0];
                    }
                }
                if (string.IsNullOrEmpty(ipAddress)) {
                    ipAddress = request.ServerVariables["REMOTE_ADDR"];
                }

                // Get client ip address using UserHostAddress
                if (string.IsNullOrEmpty(ipAddress)) {
                    var clientIPA = GetNetworkAddress(request.UserHostAddress);
                    if (clientIPA != null) {
                        ipAddress = clientIPA.ToString();
                    }
                }
            }

            // Get local machine ip address
            if (string.IsNullOrEmpty(ipAddress)) {
                var loacalIPA = GetNetworkAddress(System.Net.Dns.GetHostName());
                if (loacalIPA != null) {
                    ipAddress = loacalIPA.ToString();
                }
            }
            return ipAddress;
        }

        private static System.Net.IPAddress GetNetworkAddress(string addresses) {
            return System.Net.Dns.GetHostAddresses(addresses)
               .FirstOrDefault(x => x.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork);
        }
    }
}// http://programmingnotes.org/
			
				
					
				
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						// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 13, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Utils.cs
//    Description: Handles general utility functions
// ============================================================================
using System;
using System.Linq;
 
namespace Utils {
    public static class Methods {
        /// <summary>
        /// Returns the IPv4 address of the calling user. When under a web
        /// environment, returns the <see cref="System.Web.HttpRequest"/> 
        /// IP address, otherwise returns the IP address of the local machine
        /// </summary>
        /// <returns>The IPv4 address of the calling user</returns>
        public static string GetIPv4Address() {
            var ipAddress = string.Empty;
 
            // Get client ip address
            if (System.Web.HttpContext.Current != null 
                && System.Web.HttpContext.Current.Request != null) {
 
                // Get client ip address using ServerVariables
                var request = System.Web.HttpContext.Current.Request;
                ipAddress = request.ServerVariables["HTTP_X_FORWARDED_FOR"];
                if (!string.IsNullOrEmpty(ipAddress)) {
                    var addresses = ipAddress.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                    if (addresses.Length > 0) {
                        ipAddress = addresses[0];
                    }
                }
                if (string.IsNullOrEmpty(ipAddress)) {
                    ipAddress = request.ServerVariables["REMOTE_ADDR"];
                }
 
                // Get client ip address using UserHostAddress
                if (string.IsNullOrEmpty(ipAddress)) {
                    var clientIPA = GetNetworkAddress(request.UserHostAddress);
                    if (clientIPA != null) {
                        ipAddress = clientIPA.ToString();
                    }
                }
            }
 
            // Get local machine ip address
            if (string.IsNullOrEmpty(ipAddress)) {
                var loacalIPA = GetNetworkAddress(System.Net.Dns.GetHostName());
                if (loacalIPA != null) {
                    ipAddress = loacalIPA.ToString();
                }
            }
            return ipAddress;
        }
 
        private static System.Net.IPAddress GetNetworkAddress(string addresses) {
            return System.Net.Dns.GetHostAddresses(addresses)
               .FirstOrDefault(x => x.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork);
        }
    }
}// http://programmingnotes.org/

3. More Examples

Below are more examples demonstrating the use of the ‘Utils‘ Namespace. Don’t forget to include the module when running the examples!





		
		
			More Examples
			
C#
			
			// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 13, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Program.cs
//    Description: The following demonstrates the use of the Utils Namespace
// ============================================================================
using System;
using System.Diagnostics;

public class Program {
    static void Main(string[] args) {
        try {
            // Get IP address of the current user
            var ipAddress = Utils.Methods.GetIPv4Address();

            Display($"IP Address: {ipAddress}");
        } catch (Exception ex) {
            Display(ex.ToString());
        } finally {
            Console.ReadLine();
        }
    }

    static void Display(string message) {
        Console.WriteLine(message);
        Debug.Print(message);
    }
}// http://programmingnotes.org/
			
				
					
				
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						// ============================================================================
//    Author: Kenneth Perkins
//    Date:   May 13, 2021
//    Taken From: http://programmingnotes.org/
//    File:  Program.cs
//    Description: The following demonstrates the use of the Utils Namespace
// ============================================================================
using System;
using System.Diagnostics;
 
public class Program {
    static void Main(string[] args) {
        try {
            // Get IP address of the current user
            var ipAddress = Utils.Methods.GetIPv4Address();
 
            Display($"IP Address: {ipAddress}");
        } catch (Exception ex) {
            Display(ex.ToString());
        } finally {
            Console.ReadLine();
        }
    }
 
    static void Display(string message) {
        Console.WriteLine(message);
        Debug.Print(message);
    }
}// http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

VB.NET || How To Get The Computer & User Client IP Address Using VB.NET

November 29, 2020 admin No comments

The following is a module with functions which demonstrates how to get the computers and user client request IPv4 IP address using VB.NET.

The following function uses System.Web to determine the IP address of the client.

Note: To use the function in this module, make sure you have a reference to ‘System.Web‘ in your project.

1. Get IP Address

The example below demonstrates the use of ‘Utils.GetIPv4Address‘ to get the IPv4 address of the calling user.





		
		
			1. Get IP Address
			
Visual Basic .NET
			
			' Get IP Address

' Get IP address of the current user
Dim ipAddress = Utils.GetIPv4Address

Debug.Print($"IP Address: {ipAddress}")

' example output:
'    IP Address: 192.168.0.5 
			
				
					
				
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						' Get IP Address
 
' Get IP address of the current user
Dim ipAddress = Utils.GetIPv4Address
 
Debug.Print($"IP Address: {ipAddress}")
 
' example output:
'    IP Address: 192.168.0.5

2. Utils Namespace

The following is the Utils Namespace. Include this in your project to start using!





		
		
			Utils Namespace
			
Visual Basic .NET
			
			' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 29, 2020
'    Taken From: http://programmingnotes.org/
'    File: Utils.vb
'    Description: Handles general utility functions
' ============================================================================
Option Strict On
Option Explicit On

Namespace Global.Utils
    Public Module modUtils
        ''' <summary>
        ''' Returns the IPv4 address of the calling user. When under a web 
        ''' environment, returns the <see cref="System.Web.HttpRequest"/> 
        ''' IP address, otherwise returns the IP address of the local machine
        ''' </summary>
        ''' <returns>The IPv4 address of the calling user</returns>
        Public Function GetIPv4Address() As String
            Dim ipAddress = String.Empty

            ' Get client ip address
            If System.Web.HttpContext.Current IsNot Nothing _
                AndAlso System.Web.HttpContext.Current.Request IsNot Nothing Then

                ' Get client ip address using ServerVariables
                Dim request = System.Web.HttpContext.Current.Request
                ipAddress = request.ServerVariables("HTTP_X_FORWARDED_FOR")
                If Not String.IsNullOrEmpty(ipAddress) Then
                    Dim addresses = ipAddress.Split(",".ToCharArray, StringSplitOptions.RemoveEmptyEntries)
                    If addresses.Length > 0 Then
                        ipAddress = addresses(0)
                    End If
                End If
                If String.IsNullOrEmpty(ipAddress) Then
                    ipAddress = request.ServerVariables("REMOTE_ADDR")
                End If

                ' Get client ip address using UserHostAddress
                If String.IsNullOrEmpty(ipAddress) Then
                    Dim clientIPA = GetNetworkAddress(request.UserHostAddress)
                    If clientIPA IsNot Nothing Then
                        ipAddress = clientIPA.ToString
                    End If
                End If
            End If

            ' Get local machine ip address
            If String.IsNullOrEmpty(ipAddress) Then
                Dim loacalIPA = GetNetworkAddress(System.Net.Dns.GetHostName)
                If loacalIPA IsNot Nothing Then
                    ipAddress = loacalIPA.ToString
                End If
            End If
            Return ipAddress
        End Function

        Private Function GetNetworkAddress(addresses As String) As System.Net.IPAddress
            Return System.Net.Dns.GetHostAddresses(addresses) _
                .FirstOrDefault(Function(x) x.AddressFamily = System.Net.Sockets.AddressFamily.InterNetwork)
        End Function
    End Module
End Namespace ' http://programmingnotes.org/
			
				
					
				
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						' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 29, 2020
'    Taken From: http://programmingnotes.org/
'    File: Utils.vb
'    Description: Handles general utility functions
' ============================================================================
Option Strict On
Option Explicit On
 
Namespace Global.Utils
    Public Module modUtils
        ''' <summary>
        ''' Returns the IPv4 address of the calling user. When under a web 
        ''' environment, returns the <see cref="System.Web.HttpRequest"/> 
        ''' IP address, otherwise returns the IP address of the local machine
        ''' </summary>
        ''' <returns>The IPv4 address of the calling user</returns>
        Public Function GetIPv4Address() As String
            Dim ipAddress = String.Empty
 
            ' Get client ip address
            If System.Web.HttpContext.Current IsNot Nothing _
                AndAlso System.Web.HttpContext.Current.Request IsNot Nothing Then
 
                ' Get client ip address using ServerVariables
                Dim request = System.Web.HttpContext.Current.Request
                ipAddress = request.ServerVariables("HTTP_X_FORWARDED_FOR")
                If Not String.IsNullOrEmpty(ipAddress) Then
                    Dim addresses = ipAddress.Split(",".ToCharArray, StringSplitOptions.RemoveEmptyEntries)
                    If addresses.Length > 0 Then
                        ipAddress = addresses(0)
                    End If
                End If
                If String.IsNullOrEmpty(ipAddress) Then
                    ipAddress = request.ServerVariables("REMOTE_ADDR")
                End If
 
                ' Get client ip address using UserHostAddress
                If String.IsNullOrEmpty(ipAddress) Then
                    Dim clientIPA = GetNetworkAddress(request.UserHostAddress)
                    If clientIPA IsNot Nothing Then
                        ipAddress = clientIPA.ToString
                    End If
                End If
            End If
 
            ' Get local machine ip address
            If String.IsNullOrEmpty(ipAddress) Then
                Dim loacalIPA = GetNetworkAddress(System.Net.Dns.GetHostName)
                If loacalIPA IsNot Nothing Then
                    ipAddress = loacalIPA.ToString
                End If
            End If
            Return ipAddress
        End Function
 
        Private Function GetNetworkAddress(addresses As String) As System.Net.IPAddress
            Return System.Net.Dns.GetHostAddresses(addresses) _
                .FirstOrDefault(Function(x) x.AddressFamily = System.Net.Sockets.AddressFamily.InterNetwork)
        End Function
    End Module
End Namespace ' http://programmingnotes.org/

3. More Examples

Below are more examples demonstrating the use of the ‘Utils‘ Namespace. Don’t forget to include the module when running the examples!





		
		
			More Examples
			
Visual Basic .NET
			
			' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 29, 2020
'    Taken From: http://programmingnotes.org/
'    File: Program.vb
'    Description: The following demonstrates the use of the Utils Namespace
' ============================================================================
Option Strict On
Option Explicit On
Imports System

Public Module Program
    Sub Main(args As String())
        Try
            ' Get IP address of the current user
            Dim ipAddress = Utils.GetIPv4Address

            Display($"IP Address: {ipAddress}")
        Catch ex As Exception
            Display(ex.ToString)
        Finally
            Console.ReadLine()
        End Try
    End Sub

    Public Sub Display(message As String)
        Console.WriteLine(message)
        Debug.Print(message)
    End Sub
End Module ' http://programmingnotes.org/
			
				
					
				
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						' ============================================================================
'    Author: Kenneth Perkins
'    Date:   Nov 29, 2020
'    Taken From: http://programmingnotes.org/
'    File: Program.vb
'    Description: The following demonstrates the use of the Utils Namespace
' ============================================================================
Option Strict On
Option Explicit On
Imports System
 
Public Module Program
    Sub Main(args As String())
        Try
            ' Get IP address of the current user
            Dim ipAddress = Utils.GetIPv4Address
 
            Display($"IP Address: {ipAddress}")
        Catch ex As Exception
            Display(ex.ToString)
        Finally
            Console.ReadLine()
        End Try
    End Sub
 
    Public Sub Display(message As String)
        Console.WriteLine(message)
        Debug.Print(message)
    End Sub
End Module ' http://programmingnotes.org/

QUICK NOTES:
The highlighted lines are sections of interest to look out for.

The code is heavily commented, so no further insight is necessary. If you have any questions, feel free to leave a comment below.

Tag Archives: get ip address

C# || How To Get The Computer & User Client IP Address Using C#

VB.NET || How To Get The Computer & User Client IP Address Using VB.NET

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