CODEWITHSUNDEEP
c#vb.netwindows-7.net-4.0
MikVal
MikVal

Reputation: 3

How to reopen a file immediately after it closes via my C# application

I ran out of ideas and couldn't find any reference about it so here I go... I need to keep a secondary application wich is not related to my c# project always running in background. So if this secondary application crashes or someone else close it manually it will automatically re launch again via my c# app.

I have no clue of how to accomplish this one, I mean checking if this application closes by something external to my c# app.

Any help would be greatly appreciated. Thanks in advance.

Upvotes: 0

Views: 1177

Answers (5)

Ramesh
Ramesh

Reputation: 13266

The below code is in C# and it is inside a WinForm. 

    private void Form1_Load(object sender, EventArgs e)
    {
        Process p = Process.GetProcessesByName("Notepad")[0];
        p.EnableRaisingEvents = true;
        p.Exited += new EventHandler(p_Exited);
    }

    void p_Exited(object sender, EventArgs e)
    {
        MessageBox.Show("Exit");
    }

It looks for a Process with Name Notepad & retrieved the first instance of it. It sets EnableRaisingEvents to true on it and hooks to the Exited event. Whenever notepad is closed it would display an alert.

Based on this logic, you can build your app.

Upvotes: 2

Kamrul
Kamrul

Reputation: 334

Simplest way is to run a timer and in the tick event, use-

if (Process.GetProcessesByName("communicator").Count() == 0)
{
   Process.Start("communicator.exe");
}

Upvotes: 1

Ashish Tondak
Ashish Tondak

Reputation: 11

you can keep checking for a process if it is running or not using process class in vb.net

For Each p As Process In Process.GetProcessesByName("communicator") ShowWindow(p.MainWindowHandle, SHOW_WINDOW.SW_NORMAL) Next p

if the process you want not inthe list you may launch it again. Ashish kumar

Upvotes: 1

Damith
Damith

Reputation: 63065

As a solution you can use Windows service which invokes your always running application .
You can make that service catch error return codes from the app and restart it depending on errors.

Upvotes: 1

Tilak
Tilak

Reputation: 30698

You can use FileSystemWatcher to keep a watch of the file modified by other application.

FileSystemWatcher has events like Changed, Created,Renamed, Deleted, which can be subscribed to keep track of a file changes.

Upvotes: 0

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