WPF load texbox content at Application startup

Question

I have the following situation: A WPF app with 2 pages (using navigation). On one of the pages there is a textbox which displays some system info using WMI queries and registry data.

The problem with this approach is that that info is always refreshed when I navigate to that page, which also means that all the tasks at work behind are re-done, which makes the texbox take some time before it starts displaying the info(yeah, some WMI queries are time consuming).

Since 99 percent of that data I need doesn't need refreshing(doesn't change), how would I go about performing it only once at and then bind it to that textbox so it doesn't always refresh?

textboxt code in home.xaml.cs (the page)

private void TextBox1_Loaded(object sender, RoutedEventArgs e)
    {
        BackgroundWorker bw = new BackgroundWorker();
        bw.WorkerReportsProgress = true;
        bw.DoWork += new DoWorkEventHandler(delegate (object o, DoWorkEventArgs args)
        {
           
        });
        bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(delegate (object o, RunWorkerCompletedEventArgs args)
        {
            TextBox1.Text = Registry.GetValue(@"HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0", "ProcessorNameString", null).ToString().Replace("(R)", "").Replace("(TM)", "") + Environment.NewLine;
            TextBox1.Text += "Memory:  " + getRAMsize() + Environment.NewLine;
            TextBox1.Text += "Free Space:  " + GetTotalFreeSpace(sysdrive) + " GB" + Environment.NewLine;
            if (Is64BitSystem)
            {
                TextBox1.Text += getOS() + " 64bit" + Environment.NewLine;
            }
            else
            {
                TextBox1.Text += getOS() + " 32bit" + Environment.NewLine;
            }
            TextBox1.Text += diskname() + Environment.NewLine;
            TextBox1.Text += "MAC Address : " + System.Text.RegularExpressions.Regex.Replace(GetMacAddress().ToString(), ".{2}", "$&-").TrimEnd('-') + Environment.NewLine;
            TextBox1.Text += av();
        });
        bw.RunWorkerAsync();
    }

what it does vs what I want: Every time I navigate to it the textbox refreshes(textbox_loaded...of course) and it takes a second or two. I want to disable refreshing. I want it load once and keep those values until the app is opened again.

Answer 1

Wow...after much trial and error, I can't believe it was as easy as putting the code inside the TextBox1_Initialized event.

private void TextBox1_Initialized(object sender, RoutedEventArgs e)
{
    BackgroundWorker bw = new BackgroundWorker();
    bw.WorkerReportsProgress = true;
    bw.DoWork += new DoWorkEventHandler(delegate (object o, DoWorkEventArgs args)
    {

    });
    bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(delegate (object o, RunWorkerCompletedEventArgs args)
    {
        TextBox1.Text = Registry.GetValue(@"HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0", "ProcessorNameString", null).ToString().Replace("(R)", "").Replace("(TM)", "") + Environment.NewLine;
        TextBox1.Text += "Memory:  " + getRAMsize() + Environment.NewLine;
        TextBox1.Text += "Free Space:  " + GetTotalFreeSpace(sysdrive) + " GB" + Environment.NewLine;
        if (Is64BitSystem)
        {
            TextBox1.Text += getOS() + " 64bit" + Environment.NewLine;
        }
        else
        {
            TextBox1.Text += getOS() + " 32bit" + Environment.NewLine;
        }
        TextBox1.Text += diskname() + Environment.NewLine;
        TextBox1.Text += "MAC Address : " + System.Text.RegularExpressions.Regex.Replace(GetMacAddress().ToString(), ".{2}", "$&-").TrimEnd('-') + Environment.NewLine;
        TextBox1.Text += av();
    });
    bw.RunWorkerAsync();
}