Question

Hello I’ve runned in to a problem again that I can’t solve on my own.

I have a FileSystemWatcher named filOvervakare and uses this code to trigger a method.

filOvervakare.NotifyFilter = NotifyFilters.Size;
filOvervakare.NotifyFilter = NotifyFilters.LastWrite;

filOvervakare.Changed += new FileSystemEventHandler(filOvervakare_Changed);

This is the method:

void filOvervakare_Changed(object sender, FileSystemEventArgs e)
{
    if (MessageBox.Show("Vill du ladda upp filen " + e.Name + "?", "En fil har ändrats", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
    {
        //code code code           
    }
}

Everytime a file is changed it is supposed to show the messagebox once. The problem is that instead of getting one messagebox it pops up like 5-6 of them and I have no idea how to fix this and I hope some of you might have a good solution. 🙂

Thanks!

// Morgan

Answer 1

You could use a boolean to tell you whether you have a message box open.

private bool messageBoxIsOpen;

void filOvervakare_Changed(object sender, FileSystemEventArgs e)
{
    if (this.messageBoxIsOpen)
    {
        return;
    }

    this.messageBoxIsOpen = true;
    if (MessageBox.Show(
        "Vill du ladda upp filen " + e.Name + "?", 
        "En fil har ändrats", 
        MessageBoxButtons.YesNo, 
        MessageBoxIcon.Question) == DialogResult.Yes)
    {
       //code code code           
    }

    this.messageBoxIsOpen = false;
}