File open with detection

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Hi there, how do i detect if my program is opened trough a file

For example, if i open a txt it opens in notepad

How do i detect the opening in my program?

Posted 8-Oct-15 21:51pm

kylai12n

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3 solutions

Solution 1

C#

public bool IsFileinOpen(FileInfo file)
{
     FileStream stream = null;
 
     try
     {
         stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
     }
     catch (IOException)
     {
         //the file is unavailable because it is:
         //still being written to
         //or being processed by another thread
         //or does not exist (has already been processed)
         return true;
     }
     finally
     {
         if (stream != null)
         stream.Close();
     }
     return false; 
}

FileInfo fileObj = new FileInfo("C:\\yourfile.txt");
bool iSOpen = IsFileinOpen(fileObj);

If this method returns false then file is not used otherwise it is used in any other program.

Posted 8-Oct-15 22:01pm

Manas_Kumar

Updated 8-Oct-15 22:27pm

v3

Comments

kylai12n 9-Oct-15 4:10am

I dont really understand this, how would i use this?

IsFileinOpen(OpenedFile); ?

I need it to detect like

When i open example1.sssd

It shows it opened with that file

And with example2.sssd
(sssd) is a file extention in my case

[no name] 9-Oct-15 4:26am

Try like below:

FileInfo fileObj = new FileInfo("C:\\yourfile.txt");
IsFileinOpen(fileObj);

Here I have provided the text file name, you need to change as per your need.

Solution 2

That's a pretty advanced topic, you need to implement a hook, and you have to do it with native code. See, for instance: "API hooking revealed"[^].

Posted 8-Oct-15 22:16pm

CPallini

Comments

kylai12n 9-Oct-15 4:20am

This does not really look like the solution to be honest,

Basicly: i can run the files and then it starts my program

BUT i want the program to know its run by a file

Maby some parameters?

CPallini 9-Oct-15 6:38am

Files doesn't run. Programs runs. Programs aren't run by files.
Maybe I didn't get OP problem, but your comment is a bit obscure to me.

kylai12n 9-Oct-15 12:12pm

For example:

I have a program called: NotNotepad.exe
NotNotePad opens when you open a .nottxt file

How would my program be able to know it opened that file?

For example (This is not a real script)

Form1_Load:
if(File.OnRun)
{
MessageBox.Show("Opened with a .nottxt file");
}

Do you understand?

CPallini 9-Oct-15 12:29pm

Yes, I've got it. You have to process the arguments passed to your application. I see you already found the solution.

kylai12n 9-Oct-15 12:39pm

Yeah thanks for your time tough

CPallini 9-Oct-15 13:23pm

You are welcome.

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kylai12n · Accepted Answer · 2015-10-09T06:23:00

I managed to fix it myself

Here's the solution:

Add under (Dont remove)

public Form1()
{
InitializeComponent();

}

--->

public Form1(string caller)
{
InitializeComponent();
//Caller = the path to the file.
}

Program.cs:

static void Main(string [] args)

And:

C#

if (args.Count() == 1)
    Application.Run(new Form1(args[0]));
else
    Application.Run(new Form1());