How to open a web page from my application

Question

I want to make my WPF application open the default browser and go to a certain web page   How do I do that

User · Accepted Answer

System Diagnostics Process Start  http   www webpage com      One of many ways

User · Answer

I ve been using this line to launch the default browser   System Diagnostics Process Start  http   www google com

User · Answer

While a good answer has been given  using Process Start   it is safer to encapsulate it in a function that checks that the passed string is indeed a URI  to avoid accidentally starting random processes on the machine     public static bool IsValidUri string uri        if   Uri IsWellFormedUriString uri  UriKind Absolute           return false      Uri tmp      if   Uri TryCreate uri  UriKind Absolute  out tmp           return false      return tmp Scheme    Uri UriSchemeHttp    tmp Scheme    Uri UriSchemeHttps     public static bool OpenUri string uri         if   IsValidUri uri           return false       System Diagnostics Process Start uri        return true

User · Answer

I have the solution for this due to I have a similar problem today   Supposed you want to open http   google com from an app running with admin priviliges   ProcessStartInfo startInfo   new ProcessStartInfo  iexplore exe    http   www google com     Process Start startInfo

User · Answer

The old school way     public static void openit string x       System Diagnostics Process Start  cmd     C start          x        Use  openit  www google com

User · Answer

I ve been using this line to launch the default browser   System Diagnostics Process Start  http   www google com

User · Answer

string target   quot http   www google com quot   try       System Diagnostics Process Start target     catch  System ComponentModel Win32Exception noBrowser        if  noBrowser ErrorCode  -2147467259      MessageBox Show noBrowser Message     catch  System Exception other        MessageBox Show other Message

User · Answer

I have the solution for this due to I have a similar problem today   Supposed you want to open http   google com from an app running with admin priviliges   ProcessStartInfo startInfo   new ProcessStartInfo  iexplore exe    http   www google com     Process Start startInfo

User · Answer

The old school way     public static void openit string x       System Diagnostics Process Start  cmd     C start          x        Use  openit  www google com

User · Answer

I ve been using this line to launch the default browser   System Diagnostics Process Start  http   www google com

User · Answer

You cannot launch a web page from an elevated application  This will raise a 0x800004005 exception  probably because explorer exe and the browser are running non-elevated    To launch a web page from an elevated application in a non-elevated web browser  use the  code made by Mike Feng  I tried to pass the URL to lpApplicationName but that didn t work  Also not when I use CreateProcessWithTokenW with lpApplicationName    explorer exe   or iexplore exe  and lpCommandLine   url   The following workaround does work  Create a small EXE-project that has one task  Process Start url   use CreateProcessWithTokenW to run this  EXE  On my Windows 8 RC this works fine and opens the web page in Google Chrome

User · Answer

While a good answer has been given  using Process Start   it is safer to encapsulate it in a function that checks that the passed string is indeed a URI  to avoid accidentally starting random processes on the machine     public static bool IsValidUri string uri        if   Uri IsWellFormedUriString uri  UriKind Absolute           return false      Uri tmp      if   Uri TryCreate uri  UriKind Absolute  out tmp           return false      return tmp Scheme    Uri UriSchemeHttp    tmp Scheme    Uri UriSchemeHttps     public static bool OpenUri string uri         if   IsValidUri uri           return false       System Diagnostics Process Start uri        return true

User · Answer

Accepted answer no longer works on  NET Core 3  To make it work  use the following method   var psi   new ProcessStartInfo       FileName   url      UseShellExecute   true    Process Start  psi

User · Answer

string target   quot http   www google com quot   try       System Diagnostics Process Start target     catch  System ComponentModel Win32Exception noBrowser        if  noBrowser ErrorCode  -2147467259      MessageBox Show noBrowser Message     catch  System Exception other        MessageBox Show other Message

User · Answer

Accepted answer no longer works on  NET Core 3  To make it work  use the following method   var psi   new ProcessStartInfo       FileName   url      UseShellExecute   true    Process Start  psi

User · Answer

I ve been using this line to launch the default browser   System Diagnostics Process Start  http   www google com

User · Answer

Microsoft explains it in the KB305703 article on How to start the default Internet browser programmatically by using Visual C    Don t forget to check the Troubleshooting section

User · Answer

Here is my complete code how to open  there are 2 options   open using default browser  behavior is like opened inside the browser window   open through default command options  behavior is like you use  quot RUN EXE quot  command   open through  explorer   behavior is like you wrote url inside your folder window url     optional suggestion  4  use iexplore process location to open the required url CODE  internal static bool TryOpenUrl string p url                   try use default browser  registry  HKEY CURRENT USER Software Classes http shell open command          try                       string keyValue   Microsoft Win32 Registry GetValue   quot HKEY CURRENT USER Software Classes http shell open command quot    quot  quot   null  as string              if  string IsNullOrEmpty keyValue     false                                string browserPath   keyValue Replace  quot  1 quot   p url                   System Diagnostics Process Start browserPath                   return true                                  catch                 try open browser as default command         try                       System Diagnostics Process Start p url     browserPath  argUrl               return true                    catch                 try open through  explorer exe          try                       string browserPath   GetWindowsPath  quot explorer exe quot                string argUrl    quot   quot  quot    p url    quot   quot  quot                System Diagnostics Process Start browserPath  argUrl               return true                    catch                 return false  all failed         return false         and the Helper function  internal static string GetWindowsPath string p fileName                string path   null          string sysdir           for  int i   0  i  lt  3  i                          try                               if  i    0                                        path   Environment GetEnvironmentVariable  quot SystemRoot quot                                      else if  i    1                                        path   Environment GetEnvironmentVariable  quot windir quot                                      else if  i    2                                        sysdir   Environment GetFolderPath Environment SpecialFolder System                       path   System IO Directory GetParent sysdir  FullName                                     if  path    null                                        path   System IO Path Combine path  p fileName                       if  System IO File Exists path     true                                                return path                                                                    catch                           not found         return null         Hope i helped

User · Answer

Here is my complete code how to open  there are 2 options   open using default browser  behavior is like opened inside the browser window   open through default command options  behavior is like you use  quot RUN EXE quot  command   open through  explorer   behavior is like you wrote url inside your folder window url     optional suggestion  4  use iexplore process location to open the required url CODE  internal static bool TryOpenUrl string p url                   try use default browser  registry  HKEY CURRENT USER Software Classes http shell open command          try                       string keyValue   Microsoft Win32 Registry GetValue   quot HKEY CURRENT USER Software Classes http shell open command quot    quot  quot   null  as string              if  string IsNullOrEmpty keyValue     false                                string browserPath   keyValue Replace  quot  1 quot   p url                   System Diagnostics Process Start browserPath                   return true                                  catch                 try open browser as default command         try                       System Diagnostics Process Start p url     browserPath  argUrl               return true                    catch                 try open through  explorer exe          try                       string browserPath   GetWindowsPath  quot explorer exe quot                string argUrl    quot   quot  quot    p url    quot   quot  quot                System Diagnostics Process Start browserPath  argUrl               return true                    catch                 return false  all failed         return false         and the Helper function  internal static string GetWindowsPath string p fileName                string path   null          string sysdir           for  int i   0  i  lt  3  i                          try                               if  i    0                                        path   Environment GetEnvironmentVariable  quot SystemRoot quot                                      else if  i    1                                        path   Environment GetEnvironmentVariable  quot windir quot                                      else if  i    2                                        sysdir   Environment GetFolderPath Environment SpecialFolder System                       path   System IO Directory GetParent sysdir  FullName                                     if  path    null                                        path   System IO Path Combine path  p fileName                       if  System IO File Exists path     true                                                return path                                                                    catch                           not found         return null         Hope i helped

User · Answer

Microsoft explains it in the KB305703 article on How to start the default Internet browser programmatically by using Visual C    Don t forget to check the Troubleshooting section

User · Answer

You cannot launch a web page from an elevated application  This will raise a 0x800004005 exception  probably because explorer exe and the browser are running non-elevated    To launch a web page from an elevated application in a non-elevated web browser  use the  code made by Mike Feng  I tried to pass the URL to lpApplicationName but that didn t work  Also not when I use CreateProcessWithTokenW with lpApplicationName    explorer exe   or iexplore exe  and lpCommandLine   url   The following workaround does work  Create a small EXE-project that has one task  Process Start url   use CreateProcessWithTokenW to run this  EXE  On my Windows 8 RC this works fine and opens the web page in Google Chrome

[c#] How to open a web page from my application?

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