Classe SystemSettings
Aggiornamento: novembre 2007
Consente di accedere alle impostazioni dell'interfaccia utente e alle impostazioni native del sistema operativo Windows Embedded CE di un dispositivo.
Spazio dei nomi: Microsoft.WindowsCE.Forms
Assembly: Microsoft.WindowsCE.Forms (in Microsoft.WindowsCE.Forms.dll)
Sintassi
'Dichiarazione
Public NotInheritable Class SystemSettings
'Utilizzo
Dim instance As SystemSettings
public sealed class SystemSettings
public ref class SystemSettings sealed
public final class SystemSettings
Note
Attualmente questa classe consente di impostare solo le proprietà ScreenOrientation e Platform.
Esempi
Nell'esempio seguente viene illustrato come ruotare l'orientamento dello schermo di un dispositivo passando dalla visualizzazione predefinita verticale a zero gradi alla visualizzazione a 90 gradi, quindi a 180 gradi, quindi a 270 gradi per tornare infine a zero gradi. Ogni clic del pulsante consente di passare al valore successivo dell'enumerazione ScreenOrientation.
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports Microsoft.WindowsCE.Forms
Public Class Form1
Inherits System.Windows.Forms.Form
Private WithEvents Button1 As System.Windows.Forms.Button
Private mainMenu1 As System.Windows.Forms.MainMenu
Private StatusBar1 As System.Windows.Forms.StatusBar
' Set a variable to be incremented by button clicks
' that will change the orientation by rotating
' through the ScreenOrientation enumeration.
Private x As Integer = 0
Public Sub New()
InitializeComponent()
Me.MinimizeBox = False
' Set the screen orientation to normal
' and display the value on the status bar.
SystemSettings.ScreenOrientation = ScreenOrientation.Angle0
Me.StatusBar1.Text = SystemSettings.ScreenOrientation.ToString()
End Sub
Protected Overrides Sub Dispose(disposing As Boolean)
MyBase.Dispose(disposing)
End Sub
Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button()
Me.StatusBar1 = New System.Windows.Forms.StatusBar()
'
' Button1
'
Me.Button1.Location = New System.Drawing.Point(16, 128)
Me.Button1.Text = "Rotate"
'
' Form1
'
Me.Controls.Add(Button1)
Me.Controls.Add(StatusBar1)
Me.Text = "Orientation Demo"
End Sub
Shared Sub Main()
Application.Run(New Form1())
End Sub
' Each click event changes the screen orientation, as determined
' by the variable x, which increments from 0 to 3 and then back
' to 0. Four clicks cycle through the ScreenOrientation enumeration.
Private Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click
Select Case x
Case 0
' Pass a value for the ScreenOrientation enumeration
' to the SetOrientation method, defined below,
' and increment x so that the next button
' click rotates the screen orientation.
SetOrientation(ScreenOrientation.Angle90)
x += 1
Case 1
SetOrientation(ScreenOrientation.Angle180)
x += 1
Case 2
SetOrientation(ScreenOrientation.Angle270)
x += 1
Case 3
SetOrientation(ScreenOrientation.Angle0)
x = 0
Case Else
SetOrientation(ScreenOrientation.Angle0)
x = 0
End Select
End Sub
' Set the orientation to a value of the
' ScreenOrienation enumeration and update the
' status bar with the current angle.
Private Sub SetOrientation(so As ScreenOrientation)
' Set the requested orientation.
SystemSettings.ScreenOrientation = so
Me.StatusBar1.Text = SystemSettings.ScreenOrientation.ToString()
End Sub
End Class
using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using System.Data;
using Microsoft.WindowsCE.Forms;
namespace SystemSettingsTest
{
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.StatusBar statusBar1;
// Set a variable to be incremented by button clicks
// that will change the orientation by rotating
// through the ScreenOrientation enumeration.
int x = 0;
public Form1()
{
InitializeComponent();
this.MinimizeBox = false;
// Set the screen orientation to normal
// and display the value on the status bar.
SystemSettings.ScreenOrientation = ScreenOrientation.Angle0;
this.statusBar1.Text = SystemSettings.ScreenOrientation.ToString();
}
protected override void Dispose( bool disposing )
{
base.Dispose( disposing );
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.button1 = new System.Windows.Forms.Button();
this.statusBar1 = new System.Windows.Forms.StatusBar();
//
// button1
//
this.button1.Location = new System.Drawing.Point(16, 128);
this.button1.Text = "Rotate";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.Controls.Add(this.button1);
this.Controls.Add(this.statusBar1);
this.Menu = this.mainMenu1;
this.Text = "Orientation Demo";
}
#endregion
static void Main()
{
Application.Run(new Form1());
}
// Each click event changes the screen orientation, as determined
// by the variable x, which increments from 0 to 3 and then back
// to 0. Four clicks cycle through the ScreenOrientation enumeration.
private void button1_Click(object sender, System.EventArgs e)
{
switch(x)
{
case 0:
// Pass a value for the ScreenOrientation enumeration
// to the SetOrientation method, defined below,
// and increment x so that the next button
// click rotates the screen orientation.
SetOrientation(ScreenOrientation.Angle90);
x++;
break;
case 1:
SetOrientation(ScreenOrientation.Angle180);
x++;
break;
case 2:
SetOrientation(ScreenOrientation.Angle270);
x++;
break;
case 3:
SetOrientation(ScreenOrientation.Angle0);
x = 0;
break;
default:
SetOrientation(ScreenOrientation.Angle0);
x = 0;
break;
}
}
// Set the orientation to a value of the
// ScreenOrienation enumeration and update the
// status bar with the current angle.
private void SetOrientation(ScreenOrientation so)
{
// Set the requested orientation.
SystemSettings.ScreenOrientation = so;
this.statusBar1.Text = SystemSettings.ScreenOrientation.ToString();
}
Gerarchia di ereditarietà
System.Object
Microsoft.WindowsCE.Forms.SystemSettings
Codice thread safe
Qualsiasi membro static (Shared in Visual Basic) pubblico di questo tipo è thread-safe. I membri di istanza non sono garantiti come thread-safe.
Piattaforme
Windows CE, Windows Mobile per Smartphone, Windows Mobile per Pocket PC
.NET Framework e .NET Compact Framework non supportano tutte le versioni di ciascuna piattaforma. Per un elenco delle versioni supportate, vedere Requisiti di sistema di .NET Framework.
Informazioni sulla versione
.NET Compact Framework
Supportato in: 3.5, 2.0
Vedere anche
Riferimenti
Spazio dei nomi Microsoft.WindowsCE.Forms
Altre risorse
Procedura: gestire le modifiche di orientamento e risoluzione