You can use a Notification whenever a user should take action in your application, such as prompting to send data. Typically, you send a notification when an event occurs or a condition is met, but, for simplicity, this example displays a notification when a button is clicked. You can process responses to notifications by providing code to handle the ResponseSubmitted event.
The message in a notification can be plain text or HTML. HTML enables you to send a small HTML form that contains check boxes, buttons, lists, and other HTML elements. This example uses a simple form with Submit and Cancel buttons.
The Cancel button is identified by "cmd:2", which Windows CE uses to dismiss notifications. If cmd:2 is the name of an HTML button or other element in a message balloon, the ResponseSubmitted event is not raised. The notification is dismissed, but its icon is placed on the title bar and can be responded to at a later time.
To send a notification
Create a Pocket PC Windows application.
Add a Notification and a Button to the form.
Create a Notification instance.
Me.Notification1 = New Microsoft.WindowsCE.Forms.Notification
this.notification1 = new Microsoft.WindowsCE.Forms.Notification();
Add the following code to handle the Click event of the button.
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
' Use a StringBuilder for better performance.
Dim HTMLString As New StringBuilder
HTMLString.Append("<html><body>")
HTMLString.Append("Submit data?")
HTMLString.Append("<form method=\'GET\' action=notify>")
HTMLString.Append("<input type='submit'>")
HTMLString.Append( _
"<input type=button name='cmd:2' value='Cancel'>")
HTMLString.Append("</body></html>")
' Set the Text property to the HTML string.
Notification1.Text = HTMLString.ToString()
Dim IconStream As New FileStream(".\My Documents\notify.ico", _
FileMode.Open, FileAccess.Read)
Notification1.Icon = new Icon(IconStream, 16, 16)
Notification1.Caption="Notification Demo"
Notification1.Critical = false
' Display icon up to 10 seconds.
Notification1.InitialDuration = 10
Notification1.Visible = true
End Sub
private void button1_Click(object sender, System.EventArgs e)
{
StringBuilder HTMLString = new StringBuilder();
HTMLString.Append("<html><body>");
HTMLString.Append("Submit data?");
HTMLString.Append("<form method=\'GET\' action=notify>");
HTMLString.Append("<input type='submit'>");
HTMLString.Append("<input type=button name='cmd:2' value='Cancel'>");
HTMLString.Append("</body></html>");
//Set the Text property to the HTML string.
notification1.Text = HTMLString.ToString();
FileStream IconStream = new FileStream(".\\My Documents\\notify.ico",
FileMode.Open, FileAccess.Read);
notification1.Icon = new Icon(IconStream, 16, 16);
notification1.Caption="Notification Demo";
notification1.Critical = false;
// Display icon up to 10 seconds.
notification1.InitialDuration = 10;
notification1.Visible = true;
}
Add the following code to handle the ResponseSubmitted event.
' When a ResponseSubmitted event occurs, this event handler
' parses the response to determine values in the HTML form.
Private Sub Notification1_ResponseSubmitted(ByVal sender As Object, _
ByVal resevent As Microsoft.WindowsCE.Forms.ResponseSubmittedEventArgs) _
Handles Notification1.ResponseSubmitted
If resevent.Response.Substring(0,6) = "notify" Then
' Add code here to respond to the notification.
End If
End Sub
// When a ResponseSubmitted event occurs, this event handler
// parses the response to determine values in the HTML form.
notification1.ResponseSubmitted +=
delegate (object obj, ResponseSubmittedEventArgs resevent)
{
if (resevent.Response.Substring(0,6) == "notify")
{
// Add code here to respond to the notification.
}
};
Compiling the Code
This example requires references to the following namespaces:
See Also
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