How to bring a selected item from a listbox upfront

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I have a windows form application. In which in a listbox, I am showing title of all the opened windows. I have done upto this. Now I want to double click on a title in the listbox.. and this will activate that window and will show upfront. My code is like this::

C#

//this function is loading all the opened windows in the listbox 
public void LoadOpenedWindows()
        {
            Process[] processlist = Process.GetProcesses();

            foreach (Process process in processlist)
            {
                if (!String.IsNullOrEmpty(process.MainWindowTitle))
                {
                    listBox1.Items.Add(process.MainWindowTitle);
                   
               }
            }
            listBox1.DoubleClick += new EventHandler(ListBox1_DoubleClick);
            
        }

I tried to open the selected item by the following way.. But that is not working..

C#

private void ListBox1_DoubleClick(object sender, EventArgs e)
        {
            if (listBox1.SelectedItem != null)
            {
                //MessageBox.Show(listBox1.SelectedItem.ToString());
                const uint SW_SHOW = 5;
                string selected = listBox1.SelectedItem.ToString();
                IntPtr handleOfSelected = getHandle(selected);
                SetForegroundWindow(handleOfSelected);
                //BringWindowToTop(handleOfSelected);
                //ShowWindow(handleOfSelected, SW_SHOW);
            }
        }

        public IntPtr getHandle(string selectedItem)
        {
            IntPtr hWnd = IntPtr.Zero;
            foreach (Process pList in Process.GetProcesses())
            {
                if (pList.MainWindowTitle.Contains(selectedItem))
                {
                    hWnd = pList.MainWindowHandle;
                }
            }
            return hWnd;
        }

If anyone have any idea or piece of code.. Please try to help.

Posted 6-Mar-15 1:12am

JaideepChandra

Updated 6-Mar-15 1:19am

v2

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Comments

CHill60 6-Mar-15 7:51am

That's working fine for me ... what do you mean by "not working"?

JaideepChandra 6-Mar-15 7:56am

When I double click on any item in the listbox.. That window is not coming upfront.

Joan Magnet 6-Mar-15 9:11am

Try with:

SetActiveWindow(hWnd);
SetFocus(hWnd)

JaideepChandra 6-Mar-15 23:35pm

Sorry to reply late..It's not working. The selected window is not maximizing and is not coming upfront.

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Adam Zgagacz · Answer 1 · 2015-03-06T03:07:00

You need to call ShowWindowAsync.

Use the following signature:

C#

[DllImport("user32.dll")]
public static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);

Ad your double click hadler should look like this:

C#

private void ListBox1_DoubleClick(object sender, EventArgs e)
{
    if (listBox1.SelectedItem != null)
    {
        const int SW_RESTORE = 9;
        string selected = listBox1.SelectedItem.ToString();
        IntPtr handleOfSelected = getHandle(selected);
        ShowWindowAsync(handleOfSelected, SW_RESTORE);
        SetForegroundWindow(handleOfSelected);

    }
}

Adrian Vaideanu · Answer 2 · 2015-03-06T03:11:00

I believe the condition "pList.MainWindowTitle.Contains(selectedItem)" does not cover all cases. You may have multiple processes with the selectedItem name in the title, but not all processes may have a window associated with them. Since this is in a foreach loop only the last process handle found will be retrieved.

Also, another important verification would be to see if the process actually has a window associated with it. If MainWindowHandle is 0 there is no window associated with it.

How to bring a selected item from a listbox upfront

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