Develop Reference

Disposing of Notifications C#

I have an app where when there is a change to a label it creates a clickable notification. It all works perfectly however the notification icon stays in the system tray and you end up with loads of them. I know I can use the notification.dispose but I don't know where to use it. Here is the code:
private void label1_TextChanged(object sender, EventArgs e)
{
string strNumber = label1.Text;
if (strNumber.StartsWith("0") || strNumber.StartsWith("+44") & strNumber.Length < 17 & strNumber.Length > 8)
{
var notification = new System.Windows.Forms.NotifyIcon()
{
Visible = true,
Icon = System.Drawing.SystemIcons.Question,
BalloonTipTitle = "Click here to dial",
BalloonTipText = Clipboard.GetText(TextDataFormat.Text),
};
notification.ShowBalloonTip(5000);
notification.BalloonTipClicked += new System.EventHandler(notification_BalloonTipClicked);
// notification.Dispose();
}
}
I have commented out the notification.Dispose at the bottom because if I do that it disposes of it straight away and I can't click it. So I don't know where else I am supposed to add this code so that it removes the icon for it in the tray either when you click the notification or if you just wait and let it time out. I can't place it outside of this block of text as it's a local variable.
I'm a complete novice at coding so any help would be appreciated.

You need to subscribe to the events that the NotifyIcon presents.
Create functions for handling timeout and click then
notification.BallotTipClicked += MyClickFunction;
notification.BallotTipClosed += MyCloseFunction;
private void MyClickFunction(Object sender, EventArgs e) {
System.Windows.Forms.NotifyIcon notification = sender as System.Windows.Forms.NotifyIcon;
notification.Dispose()
}

C# Windows form new page

I'm trying to make a button on my windows form create a new page when clicked, something like when you are going through an installation of a program and you would click "Next" and it would take you to a new page but not bring up an entirely seperate window. I would also have another button that would be pressed to bring up the original form.
I've looked everywhere for a answer to this so any help on how I would create this would be greatly appreciated.
private void Cleaning_Click(object sender, EventArgs e)
{
// executes new page
}

What you want to do is to create a wizard. There are lot of samples on internet regarding that. Take a look;
http://www.codeproject.com/Articles/31770/Wizard-Form-Implementation
Or
You can see that SO question
Creating Wizards for Windows Forms in C#

One simple way is to use panels in a single form. The only problem with panels is that it is hard to edit the layout and also your code would become very messy.
it IS simple BUT has a very bad downside

Simply we can add one groupbox and add your controls, in form load set groupbox visible to false and button click event visible to true something like....
private void Form3_Load(object sender, EventArgs e)
{
groupBox1.Visible = false;
}
private void button1_Click_1(object sender, EventArgs e)
{
if (button1.Text == "&Show")
{
button1.Text = "&Hide";
groupBox1.Visible = true;
}
else if (button1.Text == "&Hide")
{
button1.Text = "&Show";
groupBox1.Visible = false;
}
}

c# make a program minimize to task bar

I am trying to make my application minimize to task bar/tray
Here is my code so far that I have pulled together from other SO posts and other people seem to have it working but my app minimizes to the tray but when I click it in the tray it doesn't reopen.
private void Form1_Resize(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Minimized)
{
this.notifyIcon1.Visible = true;
this.notifyIcon1.ShowBalloonTip(500);
this.Hide();
}
}
private void notifyIcon1_DoubleClick(object sender, EventArgs e)
{
this.Show();
this.WindowState = FormWindowState.Normal;
}
just to explain again the problem is the application minimizes to the tray but when I click on the icon it doesn't restore the app to normal. Instead it does nothing.

I found my problem.
what I didn't do was this
Set the NotifyIcon's visible property to false in the property editor. Now go to the property editor of Form1, click on the little lightning symbol to access the events, and double click on the Resize event, and change the code to:
and I also didn't do this
Finally we need the code to make the program show up again when the icon is double clicked. So double click on NotifyIcon1 in the designer,
I found this information here
Dreamincode

This is what I have used in the past but I fund a copy online at the link below
if (FormWindowState.Minimized == this.WindowState)
{
notifyIcon1.Visible = true;
notifyIcon1.ShowBalloonTip(500);
this.Hide();
}
found here: http://www.codeproject.com/Articles/27599/Minimize-window-to-system-tray

How to trigger the auto-hide icon in c#?

I have an application. If the application is not being used for a certain amount if time, it should hide. When application is hidden and we mouse-over the icon, it should be restored.
How can I do this? Thanks in advance.

You have to define a timer in your application that will count the time when mouse is not over the form/window. Then just hide your application.
Download WPF NotifyIcon
And handle MouseOver event, that will show Form/Window
EDIT:
If you do not need to minimize application to tray and hide window keeping it on desktop -> use the same algorithm, but do not hide the window, just set transparency to 0% or 10%. When mouse is over - set transparency to 100%.

Like JesseJames said, use a timer to measure the inactive time of the application and hide it after an amount of time. Re-activate it when the mouse is hovered over the NotifyIcon. Here's a sample WindowsForms solution that does the job:
private Timer _timer;
private int _ticks;
public Form1()
{
_timer = new Timer { Interval = 1000, Enabled = true };
_timer.Tick += TimerTick;
Activated += Form1_Activated;
MouseMove += Form1_MouseMove;
//notifyIcon1 is an icon set through the designer
notifyIcon1.MouseMove += NotifyIcon1MouseMove;
}
protected void TimerTick(object sender, EventArgs e)
{
//After 5 seconds the app will be hidden
if (_ticks++ == 5)
{
WindowState = FormWindowState.Minimized;
Hide();
_timer.Stop();
_ticks = 0;
}
}
protected void NotifyIcon1MouseMove(object sender, MouseEventArgs e)
{
WindowState = FormWindowState.Normal;
Show();
_ticks = 0;
_timer.Start();
}
protected void Form1_MouseMove(object sender, MouseEventArgs e)
{
_ticks = 0;
}
Perhaps there might exist a cleaner solution, I don't know, but it gets you on the way. Same principle will go for WPF, only the code will be slightly different. Hope this helps!

To see if the user has made any input you can use a similar approach like this one. To get your application visible again you need a way to get the global mouse and maybe keyboard input, to do this you can use hooks, you can find one solution for that here. And if the hook is triggered it really just depends on what kind of UI you are using, but calling specific hide or show methods should be suffice.

Changing theme calls UserControl_Loaded event

I am not getting why behavior of WPF user control and Windows forms user control is different . I added window loaded event which just shows message box as :
private void Window_Loaded(object sender, RoutedEventArgs e)
{
MessageBox.Show("Main Window Loaded","WPF");
}
Also I created one user control and added loaded event as :
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
MessageBox.Show("User Control Loaded.","WPF");
}
I have put this user control in main window.
When i launch this , I get both message box, User controls as well as windows.
Now , When i change my theme from Aero to any High contrast then user control's message box is shown again.
Why this is happening ? Why this is different from Windows form ? What should I do to avoid showing it multiple times ?
Wajeed

You could have a boolean field which stores the state of whether the dialog was shown yet or not. If you change the theme the UI-elements will reload so naturally the event will fire again.
if (!_diagWasShown)
{
_diagWasShown = true;
//Show dialogue
}

you can create bool variable, which will indicate if MessageBox was shown.
bool isUserMessageBoxShown = false;
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
if (!isUserMessageBoxShown)
{
MessageBox.Show("User Control Loaded.","WPF");
isUserMessageBoxShown = true;
}
}