I am creating a windows application using C#.Net. I am showing a form when starting an application using below code :
Form myForm = new MyForm();
Application.Run(myForm);
Application is not appearing in taskbar, but I know its running since I can navigate to the application window using Alt-TAB.
If I use myForm.ShowDialog(), application is visible in taskbar.
What am I missing here?
UPDATE: ShowInTaskbar property is set to true for the form.
UPDATE2: FormBorderStyle is set to None
Toggle ShowInTaskbar in your form load event with these two lines:
This.ShowInTaskbar = False
This.ShowInTaskbar = True
It worked for me.
Add Activate() in Form_Shown event.
With .NET Framework 4.6.1, toggling:
this.ShowInTaskBar = false;
this.ShowInTaskBar = true;
causes FormClosing event being fired.
Calling this.Activate() in Shown event works properly.
In my case it was nonmodal form, called to be shown with ShowDialog(), but the request to create and show the form was sent from pipe. When executed by user's click on main form, everything was ok, form was shown and appeared on the taskbar.
You may not set an empty string as windows title during Form load.
This is what happened to me today (my window title is retrieved from a file that was missing, and so the window disappeared from the taskbar).
Related
In the form calling the 2nd form I have this code:
this.WindowState = FormWindowState.Minimized;
frmCalledForm frm = new frmCalledForm();
frm.Show();
this.WindowState = FormWindowState.Normal;
And in the Load() event of frmCalledForm
this.TopMost = true;
this.BringToFront();
this.Activate();
I have the code calling the 2nd form in a button click event and at one point I open it programmatically based on certain conditions.
In both cases, the called form does not get focus, the calling form retains focus, even though it is minimized and then returned to normal.
I found the above code in this SO question, and apparently it's working for him, but for some reason it's not working for me.
Due to Chris's comment about returning the calling form to Normal state, I commented that line out, but left the line minimizing the calling form.
Besides the fact that, to the user, the main form will suddenly disappear to his taskbar and stay there, which obviously doesn't make for a good user experience. But when I ran the program with the modified code, the main form went to the taskbar, and the called form opened, but still did not have focus. I was quite surprised to see that.
I have a main form (which I need to show in the taskbar) and a few additional forms which I don't want to be shown in the taskbar. When I'm setting ShowInTaskbar property to false for my additional forms, after minimizing I can see little windows with form names as shown below in the screenshot. So the question is: how to remove that little nasty windows?
Screenshot:
If you "Minimize" the window, it has to go somewhere - either the Taskbar or the desktop. You can set the MinimizeBox property to False and that will prevent it from minimizing to the desktop or at all.
I think what you really want to do is hide the form. And if you still want the user to have the ability to "Minimize" the form (or at least think they do) you can subscribe to the form's Resize event and check the WindowState. If the WindowState is Minimized, set it back to Normal and call the form's Hide method.
private void LoadedDataForm_Resize (object sender, EventArgs e)
{
if (this.WindowState == FormWindowState.Minimized) {
this.WindowState = FormWindowState.Normal;
this.Hide ();
}
}
I have a WinForms Form I call from two places, one from a tray-icon's context menu and from a context menu I get from right-clicking on my app's shortcut on the desktop. When I use the tray-icon's menu the form opens just fine, even if it was minimized - it displays again. The problem is when I use the link. If the form is minimized, sometimes it will restore it, but other times it won't. The application's icon on the task-bar will flash but the window itself won't show.
I checked through debugging and both calls to display the form are from the same thread. Are there other contexts I'm missing that might interfere?
Code I use:
public void Display()
{
this.WindowState = FormWindowState.Normal;
this.Show();
this.Activate();
this.Focus();
}
I have a Main Form and a Other Form.
The Main Form is always open, and at some time it will launch Other Form.
I tried:
form.TopMost = true;
But this only places the form on top. The Form behind (Main Form) still can be accessible.
How can I get the same behavior like when I do OpenFileDialog, and disable the main form behind it?
(Thanks in advance)
You need to make your form modal. To do this, use ShowDialog instead of Show to display it (the same way you do with a dialog).
Also, note that forms shown with ShowDialog are not actually closed and disposed when you click their Close button, so you should dispose them manually. The usual way to handle their lifetime is to use a using construct:
using (var form = new SomeForm())
{
form.ShowDialog();
// do stuff after the dialog is closed
}
form.showdialog(); where form is the the top form to be launched.so while lauching the top form just add form.showdialog()
i am using normal Form2.Show() and From1.Hide() to navigate the Form1 to Form2.
Application button is disappearing and appearing on the task bar while navigating just like flickering.
How to avoid this flickering?
Your approach is wrong. You should have one main form which will be showing in taskbar. And all child forms should be set ShowInTaskBar = false. When ever, button on taskbar is clicked, application should activate / minimize the current visible child. This way you wont see button changing in taskbar. But personally I dont see any issue with current flickering, it is by default and there is nothing wrong with it.