NotifyIcon.Icon 属性
获取或设置当前图标。
**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms(在 system.windows.forms.dll 中)
语法
声明
<LocalizableAttribute(True)> _
Public Property Icon As Icon
用法
Dim instance As NotifyIcon
Dim value As Icon
value = instance.Icon
instance.Icon = value
[LocalizableAttribute(true)]
public Icon Icon { get; set; }
[LocalizableAttribute(true)]
public:
property Icon^ Icon {
Icon^ get ();
void set (Icon^ value);
}
/** @property */
public Icon get_Icon ()
/** @property */
public void set_Icon (Icon value)
public function get Icon () : Icon
public function set Icon (value : Icon)
属性值
由 NotifyIcon 组件显示的 Icon。默认值为 空引用(在 Visual Basic 中为 Nothing)。
示例
下面的代码示例演示如何使用 NotifyIcon 类在通知区域中显示某一应用程序的图标。该示例演示如何设置 Icon、ContextMenu、Text 和 Visible 属性以及如何处理 DoubleClick 事件。一个带有“退出”项的 ContextMenu 被分配给 NotifyIcon.ContextMenu 属性,使用户可以关闭应用程序。当发生 DoubleClick 事件时,将通过调用 Form.Activate 方法来激活该应用程序窗体。
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Public NotInheritable Class Form1
Inherits System.Windows.Forms.Form
Private contextMenu1 As System.Windows.Forms.ContextMenu
Friend WithEvents menuItem1 As System.Windows.Forms.MenuItem
Friend WithEvents notifyIcon1 As System.Windows.Forms.NotifyIcon
Private components As System.ComponentModel.IContainer
<System.STAThread()> _
Public Shared Sub Main()
System.Windows.Forms.Application.Run(New Form1)
End Sub 'Main
Public Sub New()
Me.components = New System.ComponentModel.Container
Me.contextMenu1 = New System.Windows.Forms.ContextMenu
Me.menuItem1 = New System.Windows.Forms.MenuItem
' Initialize contextMenu1
Me.contextMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() _
{Me.menuItem1})
' Initialize menuItem1
Me.menuItem1.Index = 0
Me.menuItem1.Text = "E&xit"
' Set up how the form should be displayed.
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Text = "Notify Icon Example"
' Create the NotifyIcon.
Me.notifyIcon1 = New System.Windows.Forms.NotifyIcon(Me.components)
' The Icon property sets the icon that will appear
' in the systray for this application.
notifyIcon1.Icon = New Icon("appicon.ico")
' The ContextMenu property sets the menu that will
' appear when the systray icon is right clicked.
notifyIcon1.ContextMenu = Me.contextMenu1
' The Text property sets the text that will be displayed,
' in a tooltip, when the mouse hovers over the systray icon.
notifyIcon1.Text = "Form1 (NotifyIcon example)"
notifyIcon1.Visible = True
End Sub 'New
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
' Clean up any components being used.
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub 'Dispose
Private Sub notifyIcon1_DoubleClick(Sender as object, e as EventArgs) handles notifyIcon1.DoubleClick
' Show the form when the user double clicks on the notify icon.
' Set the WindowState to normal if the form is minimized.
if (me.WindowState = FormWindowState.Minimized) then _
me.WindowState = FormWindowState.Normal
' Activate the form.
me.Activate()
end sub
Private Sub menuItem1_Click(Sender as object, e as EventArgs) handles menuItem1.Click
' Close the form, which closes the application.
me.Close()
end sub
End Class 'Form1
using System;
using System.Drawing;
using System.Windows.Forms;
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.NotifyIcon notifyIcon1;
private System.Windows.Forms.ContextMenu contextMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.ComponentModel.IContainer components;
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
public Form1()
{
this.components = new System.ComponentModel.Container();
this.contextMenu1 = new System.Windows.Forms.ContextMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
// Initialize contextMenu1
this.contextMenu1.MenuItems.AddRange(
new System.Windows.Forms.MenuItem[] {this.menuItem1});
// Initialize menuItem1
this.menuItem1.Index = 0;
this.menuItem1.Text = "E&xit";
this.menuItem1.Click += new System.EventHandler(this.menuItem1_Click);
// Set up how the form should be displayed.
this.ClientSize = new System.Drawing.Size(292, 266);
this.Text = "Notify Icon Example";
// Create the NotifyIcon.
this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components);
// The Icon property sets the icon that will appear
// in the systray for this application.
notifyIcon1.Icon = new Icon("appicon.ico");
// The ContextMenu property sets the menu that will
// appear when the systray icon is right clicked.
notifyIcon1.ContextMenu = this.contextMenu1;
// The Text property sets the text that will be displayed,
// in a tooltip, when the mouse hovers over the systray icon.
notifyIcon1.Text = "Form1 (NotifyIcon example)";
notifyIcon1.Visible = true;
// Handle the DoubleClick event to activate the form.
notifyIcon1.DoubleClick += new System.EventHandler(this.notifyIcon1_DoubleClick);
}
protected override void Dispose( bool disposing )
{
// Clean up any components being used.
if( disposing )
if (components != null)
components.Dispose();
base.Dispose( disposing );
}
private void notifyIcon1_DoubleClick(object Sender, EventArgs e)
{
// Show the form when the user double clicks on the notify icon.
// Set the WindowState to normal if the form is minimized.
if (this.WindowState == FormWindowState.Minimized)
this.WindowState = FormWindowState.Normal;
// Activate the form.
this.Activate();
}
private void menuItem1_Click(object Sender, EventArgs e) {
// Close the form, which closes the application.
this.Close();
}
}
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
public ref class Form1: public System::Windows::Forms::Form
{
private:
System::Windows::Forms::NotifyIcon^ notifyIcon1;
System::Windows::Forms::ContextMenu^ contextMenu1;
System::Windows::Forms::MenuItem^ menuItem1;
System::ComponentModel::IContainer^ components;
public:
Form1()
{
this->components = gcnew System::ComponentModel::Container;
this->contextMenu1 = gcnew System::Windows::Forms::ContextMenu;
this->menuItem1 = gcnew System::Windows::Forms::MenuItem;
// Initialize contextMenu1
array<System::Windows::Forms::MenuItem^>^temp0 = {this->menuItem1};
this->contextMenu1->MenuItems->AddRange( temp0 );
// Initialize menuItem1
this->menuItem1->Index = 0;
this->menuItem1->Text = "E&xit";
this->menuItem1->Click += gcnew System::EventHandler( this, &Form1::menuItem1_Click );
// Set up how the form should be displayed.
this->ClientSize = System::Drawing::Size( 292, 266 );
this->Text = "Notify Icon Example";
// Create the NotifyIcon.
this->notifyIcon1 = gcnew System::Windows::Forms::NotifyIcon( this->components );
// The Icon property sets the icon that will appear
// in the systray for this application.
notifyIcon1->Icon = gcnew System::Drawing::Icon( "appicon.ico" );
// The ContextMenu property sets the menu that will
// appear when the systray icon is right clicked.
notifyIcon1->ContextMenu = this->contextMenu1;
// The Text property sets the text that will be displayed,
// in a tooltip, when the mouse hovers over the systray icon.
notifyIcon1->Text = "Form1 (NotifyIcon example)";
notifyIcon1->Visible = true;
// Handle the DoubleClick event to activate the form.
notifyIcon1->DoubleClick += gcnew System::EventHandler( this, &Form1::notifyIcon1_DoubleClick );
}
protected:
~Form1()
{
if ( components != nullptr )
{
delete components;
}
}
private:
void notifyIcon1_DoubleClick( Object^ /*Sender*/, EventArgs^ /*e*/ )
{
// Show the form when the user double clicks on the notify icon.
// Set the WindowState to normal if the form is minimized.
if ( this->WindowState == FormWindowState::Minimized )
this->WindowState = FormWindowState::Normal;
// Activate the form.
this->Activate();
}
void menuItem1_Click( Object^ /*Sender*/, EventArgs^ /*e*/ )
{
// Close the form, which closes the application.
this->Close();
}
};
[STAThread]
int main()
{
Application::Run( gcnew Form1 );
}
import System.*;
import System.Drawing.*;
import System.Windows.Forms.*;
public class Form1 extends System.Windows.Forms.Form
{
private System.Windows.Forms.NotifyIcon notifyIcon1;
private System.Windows.Forms.ContextMenu contextMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.ComponentModel.IContainer components;
/** @attribute STAThread()
*/
public static void main(String[] args)
{
Application.Run(new Form1());
} //main
public Form1()
{
this.components = new System.ComponentModel.Container();
this.contextMenu1 = new System.Windows.Forms.ContextMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
// Initialize contextMenu1
this.contextMenu1.get_MenuItems().AddRange(
new System.Windows.Forms.MenuItem[] { this.menuItem1 });
// Initialize menuItem1
this.menuItem1.set_Index(0);
this.menuItem1.set_Text("E&xit");
this.menuItem1.add_Click(new System.EventHandler(this.menuItem1_Click));
// Set up how the form should be displayed.
this.set_ClientSize(new System.Drawing.Size(292, 266));
this.set_Text("Notify Icon Example");
// Create the NotifyIcon.
this.notifyIcon1 = new System.Windows.Forms.NotifyIcon(this.components);
// The Icon property sets the icon that will appear
// in the systray for this application.
notifyIcon1.set_Icon(new Icon("appicon.ico"));
// The ContextMenu property sets the menu that will
// appear when the systray icon is right clicked.
notifyIcon1.set_ContextMenu(this.contextMenu1);
// The Text property sets the text that will be displayed,
// in a tooltip, when the mouse hovers over the systray icon.
notifyIcon1.set_Text("Form1 (NotifyIcon example)");
notifyIcon1.set_Visible(true);
// Handle the DoubleClick event to activate the form.
notifyIcon1.add_DoubleClick(
new System.EventHandler(this.notifyIcon1_DoubleClick));
} //Form1
protected void Dispose(boolean disposing)
{
// Clean up any components being used.
if (disposing) {
if (components != null) {
components.Dispose();
}
}
super.Dispose(disposing);
} //Dispose
private void notifyIcon1_DoubleClick(Object Sender, EventArgs e)
{
// Show the form when the user double clicks on the notify icon.
// Set the WindowState to normal if the form is minimized.
if (this.get_WindowState().Equals(FormWindowState.Minimized)) {
this.set_WindowState(FormWindowState.Normal);
}
// Activate the form.
this.Activate();
} //notifyIcon1_DoubleClick
private void menuItem1_Click(Object Sender, EventArgs e)
{
// Close the form, which closes the application.
this.Close();
} //menuItem1_Click
} //Form1
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求。
版本信息
.NET Framework
受以下版本支持:2.0、1.1、1.0