StandardCommands 类
定义可用于大多数应用程序的标准命令集的标识符。
**命名空间:**System.ComponentModel.Design
**程序集:**System(在 system.dll 中)
语法
声明
Public Class StandardCommands
用法
Dim instance As StandardCommands
public class StandardCommands
public ref class StandardCommands
public class StandardCommands
public class StandardCommands
备注
此类定义可用于设计器的标准命令的 CommandID 标识符。
若要将命令从 StandardCommands 类添加到设计器菜单,必须调用 IMenuCommandService 的 AddCommand 方法,并从 StandardCommands 中添加包含 CommandID 的 MenuCommand。
提示
应用于此类的 HostProtectionAttribute 属性 (Attribute) 具有以下 Resources 属性 (Property) 值:SharedState。HostProtectionAttribute 不影响桌面应用程序(这些应用程序通常通过双击图标、键入命令或在浏览器中输入 URL 来启动)。有关更多信息,请参见 HostProtectionAttribute 类或 SQL Server 编程和宿主保护属性。
示例
下面的代码示例说明如何将 StandardCommands 类的成员添加到 MenuCommand 以及如何将 MenuCommand 添加到 IMenuCommandService。
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class CDesigner
Inherits System.ComponentModel.Design.ComponentDesigner
Public Overrides Sub Initialize(ByVal comp As IComponent)
MyBase.Initialize(comp)
Dim mcs As IMenuCommandService = CType(comp.Site.GetService(GetType(IMenuCommandService)), IMenuCommandService)
Dim mc As New MenuCommand(New EventHandler(AddressOf OnF1Help), StandardCommands.F1Help)
mc.Enabled = True
mc.Visible = True
mc.Supported = True
mcs.AddCommand(mc)
System.Windows.Forms.MessageBox.Show("Initialize() has been invoked.")
End Sub
Private Sub OnF1Help(ByVal sender As Object, ByVal e As EventArgs)
System.Windows.Forms.MessageBox.Show("F1Help has been invoked.")
End Sub
End Class
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
public class CDesigner : System.ComponentModel.Design.ComponentDesigner
{
public override void Initialize(IComponent comp)
{
base.Initialize(comp);
IMenuCommandService mcs = (IMenuCommandService)comp.Site.
GetService(typeof(IMenuCommandService));
MenuCommand mc = new MenuCommand(new EventHandler(OnF1Help), StandardCommands.F1Help);
mc.Enabled = true;
mc.Visible = true;
mc.Supported = true;
mcs.AddCommand(mc);
System.Windows.Forms.MessageBox.Show("Initialize() has been invoked.");
}
private void OnF1Help(object sender, EventArgs e)
{
System.Windows.Forms.MessageBox.Show("F1Help has been invoked.");
}
}
public ref class CDesigner: public ComponentDesigner
{
public:
[PermissionSetAttribute(SecurityAction::Demand, Name="FullTrust")]
virtual void Initialize( IComponent^ comp ) override
{
ComponentDesigner::Initialize( comp );
IMenuCommandService^ mcs = static_cast<IMenuCommandService^>(comp->Site->GetService( IMenuCommandService::typeid ));
MenuCommand^ mc = gcnew MenuCommand( gcnew EventHandler( this, &CDesigner::OnF1Help ),StandardCommands::F1Help );
mc->Enabled = true;
mc->Visible = true;
mc->Supported = true;
mcs->AddCommand( mc );
System::Windows::Forms::MessageBox::Show( "Initialize() has been invoked." );
}
private:
void OnF1Help( Object^ /*sender*/, EventArgs^ /*e*/ )
{
System::Windows::Forms::MessageBox::Show( "F1Help has been invoked." );
}
};
}
.NET Framework 安全性
- NamedPermissionSet 用于对系统资源进行完全访问。要求值:LinkDemand、InheritanceDemand。关联状态:FullTrust
继承层次结构
System.Object
System.ComponentModel.Design.StandardCommands
System.Windows.Forms.Design.MenuCommands
线程安全
此类型的任何公共静态(Visual Basic 中的 Shared)成员都是线程安全的,但不保证所有实例成员都是线程安全的。
平台
Windows 98、Windows 2000 SP4、Windows Millennium Edition、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
请参见
参考
StandardCommands 成员
System.ComponentModel.Design 命名空间
MenuCommand 类
CommandID 类
IMenuCommandService 接口