How to close chrome's C# native host exe when browser is closed

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I'm working on developing Chrome Extension for several weeks. I have almost completed a demo version of chrome extension now. but I have one problem I don't know so that I wanna get some help from you guys.I've written the host in c# lang My host program is running even though the chrome browser was closed. and then my host program is launching again when chrome browser was re-open. which means my host programs are stacking whenever chrome browser was all closing then re-opening. how can I solve this problem? Plz, help me and advice me.

Thanks in advance :D

What I have tried:

I tried to control the host app using this code

[DllImport("Kernel32")]
private static extern bool SetConsoleCtrlHandler(EventHandler handler, bool add);

private delegate bool EventHandler(CtrlType sig);
static EventHandler _handler;

enum CtrlType
{
  CTRL_C_EVENT = 0,
  CTRL_BREAK_EVENT = 1,
  CTRL_CLOSE_EVENT = 2,
  CTRL_LOGOFF_EVENT = 5,
  CTRL_SHUTDOWN_EVENT = 6
}

private static bool Handler(CtrlType sig)
{
  switch (sig)
  {
      case CtrlType.CTRL_C_EVENT:
      case CtrlType.CTRL_LOGOFF_EVENT:
      case CtrlType.CTRL_SHUTDOWN_EVENT:
      case CtrlType.CTRL_CLOSE_EVENT:
      default:
          return false;
  }
}


static void Main(string[] args)
{
  // Some biolerplate to react to close window event
  _handler += new EventHandler(Handler);
  SetConsoleCtrlHandler(_handler, true);
  ...
}

but this code is not working and not exiting the host app

Posted 29-Jun-20 22:15pm

member5320

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Comments

Richard MacCutchan 30-Jun-20 5:12am

I cannot see any connection between the above code and a Chrome extension. Also, your application appears to set a console handler and then terminate. I suspect that is not what you want it to do.

member5320 2-Jul-20 1:10am

I just want to know when is the browser is closing and when on browser closing event the host application must also be killed.

Richard MacCutchan 2-Jul-20 4:39am

Sorry, I still do not see what that has to do with the above code.

member5320 3-Jul-20 0:53am

I've found some code in c to close the native app like this

std::string req;
while(!(req=read_request()).empty())
{
//process request and send response
}

and this is my c# code to get the data from the browser

private static string OpenStandardStreamIn()
{
using var stdin = Console.OpenStandardInput();
string input = "";
int length = 0;
byte[] bytes = new byte[4];
stdin.Read(bytes, 0, 4);
length = BitConverter.ToInt32(bytes, 0);
byte[] buff = new byte[length];
stdin.Read(buff, 0, buff.Length);
input += Encoding.UTF8.GetString(buff);
return input;
}

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