IToolboxService Interface
Definition
Important
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Provides methods and properties to manage and query the toolbox in the development environment.
public interface class IToolboxService[System.Runtime.InteropServices.Guid("4BACD258-DE64-4048-BC4E-FEDBEF9ACB76")]
[System.Runtime.InteropServices.InterfaceType(System.Runtime.InteropServices.ComInterfaceType.InterfaceIsIUnknown)]
public interface IToolboxService[<System.Runtime.InteropServices.Guid("4BACD258-DE64-4048-BC4E-FEDBEF9ACB76")>]
[<System.Runtime.InteropServices.InterfaceType(System.Runtime.InteropServices.ComInterfaceType.InterfaceIsIUnknown)>]
type IToolboxService = interfacePublic Interface IToolboxService- Derived
- Attributes
Examples
The following code example demonstrates the use of the IToolboxService in design mode to list and select toolbox categories and items, and to create components or controls from toolbox items and add them to a Form. To use the example, compile the code to an assembly, and add a reference to the assembly in a Windows Forms application. If you are using Visual Studio, the IToolboxServiceControl is automatically added to the Toolbox. Create an instance of the IToolboxServiceControl on a form to test its behavior.
#using <System.dll>
#using <System.Design.dll>
#using <System.Windows.Forms.dll>
#using <System.Data.dll>
#using <System.Drawing.dll>
using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Drawing;
using namespace System::Drawing::Design;
using namespace System::Data;
using namespace System::Diagnostics;
using namespace System::Windows::Forms;
using namespace System::Security::Permissions;
namespace IToolboxServiceExample
{
// This designer passes window messages to the controls at design time.
public ref class WindowMessageDesigner: public System::Windows::Forms::Design::ControlDesigner
{
public:
WindowMessageDesigner(){}
protected:
// Window procedure passes events to control.
[SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
virtual void WndProc( System::Windows::Forms::Message% m ) override
{
if ( m.HWnd == this->Control->Handle )
ControlDesigner::WndProc( m );
else
ControlDesigner::DefWndProc( m );
}
};
// Provides an example control that functions in design mode to
// demonstrate use of the IToolboxService to list and select toolbox
// categories and items, and to add components or controls
// to the parent form using code.
[DesignerAttribute(IToolboxServiceExample::WindowMessageDesigner::typeid,IDesigner::typeid)]
public ref class IToolboxServiceControl: public System::Windows::Forms::UserControl
{
private:
System::Windows::Forms::ListBox^ listBox1;
System::Windows::Forms::ListBox^ listBox2;
IToolboxService^ toolboxService;
ToolboxItemCollection^ tools;
int controlSpacingMultiplier;
public:
IToolboxServiceControl()
{
InitializeComponent();
listBox2->DoubleClick += gcnew EventHandler( this, &IToolboxServiceControl::CreateComponent );
controlSpacingMultiplier = 0;
}
property System::ComponentModel::ISite^ Site
{
// Obtain or reset IToolboxService reference on each siting of control.
virtual System::ComponentModel::ISite^ get() override
{
return __super::Site;
}
virtual void set( System::ComponentModel::ISite^ value ) override
{
__super::Site = value;
// If the component was sited, attempt to obtain
// an IToolboxService instance.
if ( __super::Site != nullptr )
{
toolboxService = dynamic_cast<IToolboxService^>(this->GetService( IToolboxService::typeid ));
// If an IToolboxService was located, update the
// category list.
if ( toolboxService != nullptr )
UpdateLists();
}
else
toolboxService = nullptr;
}
}
private:
// Updates the list of categories and the list of items in the
// selected category.
[SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
void UpdateLists()
{
if ( toolboxService != nullptr )
{
this->listBox1->SelectedIndexChanged -= gcnew System::EventHandler( this, &IToolboxServiceControl::UpdateSelectedCategory );
this->listBox2->SelectedIndexChanged -= gcnew System::EventHandler( this, &IToolboxServiceControl::UpdateSelectedItem );
listBox1->Items->Clear();
for ( int i = 0; i < toolboxService->CategoryNames->Count; i++ )
{
listBox1->Items->Add( toolboxService->CategoryNames[ i ] );
if ( toolboxService->CategoryNames[ i ] == toolboxService->SelectedCategory )
{
listBox1->SelectedIndex = i;
tools = toolboxService->GetToolboxItems( toolboxService->SelectedCategory );
listBox2->Items->Clear();
for ( int j = 0; j < tools->Count; j++ )
listBox2->Items->Add( tools[ j ]->DisplayName );
}
}
this->listBox1->SelectedIndexChanged += gcnew System::EventHandler( this, &IToolboxServiceControl::UpdateSelectedCategory );
this->listBox2->SelectedIndexChanged += gcnew System::EventHandler( this, &IToolboxServiceControl::UpdateSelectedItem );
}
}
// Sets the selected category when a category is clicked in the
// category list.
void UpdateSelectedCategory( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
if ( toolboxService != nullptr )
{
toolboxService->SelectedCategory = dynamic_cast<String^>(listBox1->SelectedItem);
UpdateLists();
}
}
// Sets the selected item when an item is clicked in the item list.
void UpdateSelectedItem( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
if ( toolboxService != nullptr )
{
if ( listBox1->SelectedIndex != -1 )
{
if ( dynamic_cast<String^>(listBox1->SelectedItem) == toolboxService->SelectedCategory )
toolboxService->SetSelectedToolboxItem( tools[ listBox2->SelectedIndex ] );
else
UpdateLists();
}
}
}
// Creates a control from a double-clicked toolbox item and adds
// it to the parent form.
void CreateComponent( Object^ /*sender*/, EventArgs^ /*e*/ )
{
// Obtains an IDesignerHost service from design environment.
IDesignerHost^ host = dynamic_cast<IDesignerHost^>(this->GetService( IDesignerHost::typeid ));
// Get the project components container (Windows Forms control
// containment depends on controls collections).
IContainer^ container = host->Container;
// Identifies the parent Form.
System::Windows::Forms::Form^ parentForm = this->FindForm();
// Retrieves the parent Form's designer host.
IDesignerHost^ parentHost = dynamic_cast<IDesignerHost^>(parentForm->Site->GetService( IDesignerHost::typeid ));
// Create the components.
array<IComponent^>^comps = nullptr;
try
{
comps = toolboxService->GetSelectedToolboxItem()->CreateComponents( parentHost );
}
catch ( Exception^ ex )
{
// Catch and show any exceptions to prevent disabling
// the control's UI.
MessageBox::Show( ex->ToString(), "Exception message" );
}
if ( comps == nullptr )
return;
// Add any created controls to the parent form's controls
// collection. Note: components are added from the
// ToolboxItem::CreateComponents(IDesignerHost*) method.
for ( int i = 0; i < comps->Length; i++ )
{
if ( parentForm != nullptr && comps[ i ]->GetType()->IsSubclassOf( System::Windows::Forms::Control::typeid ) )
{
(dynamic_cast<System::Windows::Forms::Control^>(comps[ i ]))->Location = Point(20 * controlSpacingMultiplier,20 * controlSpacingMultiplier);
if ( controlSpacingMultiplier > 10 )
controlSpacingMultiplier = 0;
else
controlSpacingMultiplier++;
parentForm->Controls->Add( dynamic_cast<System::Windows::Forms::Control^>(comps[ i ]) );
}
}
}
protected:
// Displays labels.
virtual void OnPaint( System::Windows::Forms::PaintEventArgs^ e ) override
{
e->Graphics->DrawString( "IToolboxService Control", gcnew System::Drawing::Font( "Arial",14 ), gcnew SolidBrush( Color::Black ), 6, 4 );
e->Graphics->DrawString( "Category List", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 8, 26 );
e->Graphics->DrawString( "Items in Category", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 208, 26 );
e->Graphics->DrawString( "(Double-click item to add to parent form)", gcnew System::Drawing::Font( "Arial",7 ), gcnew SolidBrush( Color::Black ), 232, 12 );
}
private:
void InitializeComponent()
{
this->listBox1 = gcnew System::Windows::Forms::ListBox;
this->listBox2 = gcnew System::Windows::Forms::ListBox;
this->SuspendLayout();
this->listBox1->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Left);
this->listBox1->Location = System::Drawing::Point( 8, 41 );
this->listBox1->Name = "listBox1";
this->listBox1->Size = System::Drawing::Size( 192, 368 );
this->listBox1->TabIndex = 0;
this->listBox1->SelectedIndexChanged += gcnew System::EventHandler( this, &IToolboxServiceControl::UpdateSelectedCategory );
this->listBox2->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
this->listBox2->Location = System::Drawing::Point( 208, 41 );
this->listBox2->Name = "listBox2";
this->listBox2->Size = System::Drawing::Size( 228, 368 );
this->listBox2->TabIndex = 3;
this->BackColor = System::Drawing::Color::Beige;
array<System::Windows::Forms::Control^>^temp0 = {this->listBox2,this->listBox1};
this->Controls->AddRange( temp0 );
this->Location = System::Drawing::Point( 500, 400 );
this->Name = "IToolboxServiceControl*";
this->Size = System::Drawing::Size( 442, 422 );
this->ResumeLayout( false );
}
};
}
using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Design;
using System.Data;
using System.Diagnostics;
using System.Windows.Forms;
namespace IToolboxServiceExample
{
// Provides an example control that functions in design mode to
// demonstrate use of the IToolboxService to list and select toolbox
// categories and items, and to add components or controls
// to the parent form using code.
[DesignerAttribute(typeof(WindowMessageDesigner), typeof(IDesigner))]
public class IToolboxServiceControl : System.Windows.Forms.UserControl
{
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.ListBox listBox2;
private IToolboxService toolboxService = null;
private ToolboxItemCollection tools;
private int controlSpacingMultiplier;
public IToolboxServiceControl()
{
InitializeComponent();
listBox2.DoubleClick += new EventHandler(this.CreateComponent);
controlSpacingMultiplier = 0;
}
// Obtain or reset IToolboxService reference on each siting of control.
public override System.ComponentModel.ISite Site
{
get
{
return base.Site;
}
set
{
base.Site = value;
// If the component was sited, attempt to obtain
// an IToolboxService instance.
if( base.Site != null )
{
toolboxService = (IToolboxService)this.GetService(typeof(IToolboxService));
// If an IToolboxService was located, update the
// category list.
if( toolboxService != null )
UpdateLists();
}
else
{
toolboxService = null;
}
}
}
// Updates the list of categories and the list of items in the
// selected category.
private void UpdateLists()
{
if( toolboxService != null )
{
this.listBox1.SelectedIndexChanged -= new System.EventHandler(this.UpdateSelectedCategory);
this.listBox2.SelectedIndexChanged -= new System.EventHandler(this.UpdateSelectedItem);
listBox1.Items.Clear();
for( int i=0; i<toolboxService.CategoryNames.Count; i++ )
{
listBox1.Items.Add( toolboxService.CategoryNames[i] );
if( toolboxService.CategoryNames[i] == toolboxService.SelectedCategory )
{
listBox1.SelectedIndex = i;
tools = toolboxService.GetToolboxItems( toolboxService.SelectedCategory );
listBox2.Items.Clear();
for( int j=0; j<tools.Count; j++ )
listBox2.Items.Add( tools[j].DisplayName );
}
}
this.listBox1.SelectedIndexChanged += new System.EventHandler(this.UpdateSelectedCategory);
this.listBox2.SelectedIndexChanged += new System.EventHandler(this.UpdateSelectedItem);
}
}
// Sets the selected category when a category is clicked in the
// category list.
private void UpdateSelectedCategory(object sender, System.EventArgs e)
{
if( toolboxService != null )
{
toolboxService.SelectedCategory = (string)listBox1.SelectedItem;
UpdateLists();
}
}
// Sets the selected item when an item is clicked in the item list.
private void UpdateSelectedItem(object sender, System.EventArgs e)
{
if( toolboxService != null )
{
if( listBox1.SelectedIndex != -1 )
{
if( (string)listBox1.SelectedItem == toolboxService.SelectedCategory )
toolboxService.SetSelectedToolboxItem(tools[listBox2.SelectedIndex]);
else
UpdateLists();
}
}
}
// Creates a control from a double-clicked toolbox item and adds
// it to the parent form.
private void CreateComponent(object sender, EventArgs e)
{
// Obtains an IDesignerHost service from design environment.
IDesignerHost host = (IDesignerHost)this.GetService(typeof(IDesignerHost));
// Get the project components container (Windows Forms control
// containment depends on controls collections).
IContainer container = host.Container;
// Identifies the parent Form.
System.Windows.Forms.Form parentForm = this.FindForm();
// Retrieves the parent Form's designer host.
IDesignerHost parentHost = (IDesignerHost)parentForm.Site.GetService(typeof(IDesignerHost));
// Create the components.
IComponent[] comps = null;
try
{
comps = toolboxService.GetSelectedToolboxItem().CreateComponents(parentHost);
}
catch(Exception ex)
{
// Catch and show any exceptions to prevent disabling
// the control's UI.
MessageBox.Show(ex.ToString(), "Exception message");
}
if( comps == null )
return;
// Add any created controls to the parent form's controls
// collection. Note: components are added from the
// ToolboxItem.CreateComponents(IDesignerHost) method.
for( int i=0; i<comps.Length; i++ )
{
if( parentForm!= null && comps[i].GetType().IsSubclassOf(typeof(System.Windows.Forms.Control)) )
{
((System.Windows.Forms.Control)comps[i]).Location = new Point(20*controlSpacingMultiplier, 20*controlSpacingMultiplier);
if( controlSpacingMultiplier > 10 )
controlSpacingMultiplier = 0;
else
controlSpacingMultiplier++;
parentForm.Controls.Add( (System.Windows.Forms.Control)comps[i] );
}
}
}
// Displays labels.
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
e.Graphics.DrawString("IToolboxService Control", new Font("Arial", 14), new SolidBrush(Color.Black), 6, 4);
e.Graphics.DrawString("Category List", new Font("Arial", 8), new SolidBrush(Color.Black), 8, 26);
e.Graphics.DrawString("Items in Category", new Font("Arial", 8), new SolidBrush(Color.Black), 208, 26);
e.Graphics.DrawString("(Double-click item to add to parent form)", new Font("Arial", 7), new SolidBrush(Color.Black), 232, 12);
}
private void InitializeComponent()
{
this.listBox1 = new System.Windows.Forms.ListBox();
this.listBox2 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
this.listBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left);
this.listBox1.Location = new System.Drawing.Point(8, 41);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(192, 368);
this.listBox1.TabIndex = 0;
this.listBox1.SelectedIndexChanged += new System.EventHandler(this.UpdateSelectedCategory);
this.listBox2.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right);
this.listBox2.Location = new System.Drawing.Point(208, 41);
this.listBox2.Name = "listBox2";
this.listBox2.Size = new System.Drawing.Size(228, 368);
this.listBox2.TabIndex = 3;
this.BackColor = System.Drawing.Color.Beige;
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.listBox2,
this.listBox1});
this.Location = new System.Drawing.Point(500, 400);
this.Name = "IToolboxServiceControl";
this.Size = new System.Drawing.Size(442, 422);
this.ResumeLayout(false);
}
}
// This designer passes window messages to the controls at design time.
public class WindowMessageDesigner : System.Windows.Forms.Design.ControlDesigner
{
public WindowMessageDesigner()
{
}
// Window procedure override passes events to control.
protected override void WndProc(ref System.Windows.Forms.Message m)
{
if( m.HWnd == this.Control.Handle )
base.WndProc(ref m);
else
this.DefWndProc(ref m);
}
}
}
Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.Drawing.Design
Imports System.Data
Imports System.Diagnostics
Imports System.Reflection
Imports System.Windows.Forms
' Provides an example control that functions in design mode to
' demonstrate use of the IToolboxService to list and select toolbox
' categories and items, and to add components or controls
' to the parent form using code.
<DesignerAttribute(GetType(WindowMessageDesigner), GetType(IDesigner))> _
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class IToolboxServiceControl
Inherits System.Windows.Forms.UserControl
Private WithEvents listBox1 As System.Windows.Forms.ListBox
Private listBox2 As System.Windows.Forms.ListBox
Private toolboxService As IToolboxService = Nothing
Private tools As ToolboxItemCollection
Private controlSpacingMultiplier As Integer
Public Sub New()
InitializeComponent()
AddHandler listBox2.DoubleClick, AddressOf Me.CreateComponent
controlSpacingMultiplier = 0
End Sub
' Obtain or reset IToolboxService reference on each siting of control.
Public Overrides Property Site() As System.ComponentModel.ISite
Get
Return MyBase.Site
End Get
Set(ByVal Value As System.ComponentModel.ISite)
MyBase.Site = Value
' If the component was sited, attempt to obtain
' an IToolboxService instance.
If (MyBase.Site IsNot Nothing) Then
toolboxService = CType(Me.GetService(GetType(IToolboxService)), IToolboxService)
' If an IToolboxService instance was located, update the
' category list.
If (toolboxService IsNot Nothing) Then
UpdateLists()
End If
Else
toolboxService = Nothing
End If
End Set
End Property
' Updates the list of categories and the list of items in the
' selected category.
Private Sub UpdateLists()
If (toolboxService IsNot Nothing) Then
RemoveHandler listBox1.SelectedIndexChanged, AddressOf Me.UpdateSelectedCategory
RemoveHandler listBox2.SelectedIndexChanged, AddressOf Me.UpdateSelectedItem
listBox1.Items.Clear()
Dim i As Integer
For i = 0 To toolboxService.CategoryNames.Count - 1
listBox1.Items.Add(toolboxService.CategoryNames(i))
If toolboxService.CategoryNames(i) = toolboxService.SelectedCategory Then
listBox1.SelectedIndex = i
tools = toolboxService.GetToolboxItems(toolboxService.SelectedCategory)
listBox2.Items.Clear()
Dim j As Integer
For j = 0 To tools.Count - 1
listBox2.Items.Add(tools(j).DisplayName)
Next j
End If
Next i
AddHandler Me.listBox1.SelectedIndexChanged, AddressOf Me.UpdateSelectedCategory
AddHandler Me.listBox2.SelectedIndexChanged, AddressOf Me.UpdateSelectedItem
End If
End Sub
' Sets the selected category when a category is clicked in the
' category list.
Private Sub UpdateSelectedCategory(ByVal sender As Object, ByVal e As System.EventArgs) Handles listBox1.SelectedIndexChanged
If (toolboxService IsNot Nothing) Then
toolboxService.SelectedCategory = CStr(listBox1.SelectedItem)
UpdateLists()
End If
End Sub
' Sets the selected item when an item is clicked in the item list.
Private Sub UpdateSelectedItem(ByVal sender As Object, ByVal e As System.EventArgs)
If (toolboxService IsNot Nothing) Then
If listBox1.SelectedIndex <> -1 Then
If CStr(listBox1.SelectedItem) = toolboxService.SelectedCategory Then
toolboxService.SetSelectedToolboxItem(tools(listBox2.SelectedIndex))
Else
UpdateLists()
End If
End If
End If
End Sub
' Creates a control from a double-clicked toolbox item and adds
' it to the parent form.
Private Sub CreateComponent(ByVal sender As Object, ByVal e As EventArgs)
' Obtains an IDesignerHost service from design environment.
Dim host As IDesignerHost = CType(Me.GetService(GetType(IDesignerHost)), IDesignerHost)
' Gets the project components container. (Windows Forms control
' containment depends on controls collections).
Dim container As IContainer = host.Container
' Identifies the parent Form.
Dim parentForm As System.Windows.Forms.Form = Me.FindForm()
' Retrieves the parent Form's designer host.
Dim parentHost As IDesignerHost = CType(parentForm.Site.GetService(GetType(IDesignerHost)), IDesignerHost)
' Create the components.
Dim comps As IComponent() = Nothing
Try
comps = toolboxService.GetSelectedToolboxItem().CreateComponents(parentHost)
Catch ex As Exception
' Catch and show any exceptions to prevent
' disabling the control's UI.
MessageBox.Show(ex.ToString(), "Exception message")
End Try
If comps Is Nothing Then
Return
End If
' Add any created controls to the parent form's controls
' collection. Note: components are added from the
' ToolboxItem.CreateComponents(IDesignerHost) method.
Dim i As Integer
For i = 0 To comps.Length - 1
If (parentForm IsNot Nothing) AndAlso CType(comps(i), Object).GetType().IsSubclassOf(GetType(System.Windows.Forms.Control)) Then
CType(comps(i), System.Windows.Forms.Control).Location = New Point(20 * controlSpacingMultiplier, 20 * controlSpacingMultiplier)
If controlSpacingMultiplier > 10 Then
controlSpacingMultiplier = 0
Else
controlSpacingMultiplier += 1
End If
parentForm.Controls.Add(CType(comps(i), System.Windows.Forms.Control))
End If
Next i
End Sub
' Displays labels.
Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
e.Graphics.DrawString("IToolboxService Control", New Font("Arial", 14), New SolidBrush(Color.Black), 6, 4)
e.Graphics.DrawString("Category List", New Font("Arial", 8), New SolidBrush(Color.Black), 8, 26)
e.Graphics.DrawString("Items in Category", New Font("Arial", 8), New SolidBrush(Color.Black), 208, 26)
e.Graphics.DrawString("(Double-click item to add to parent form)", New Font("Arial", 7), New SolidBrush(Color.Black), 232, 12)
End Sub
Private Sub InitializeComponent()
Me.listBox1 = New System.Windows.Forms.ListBox()
Me.listBox2 = New System.Windows.Forms.ListBox()
Me.SuspendLayout()
Me.listBox1.Anchor = System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left
Me.listBox1.Location = New System.Drawing.Point(8, 41)
Me.listBox1.Name = "listBox1"
Me.listBox1.Size = New System.Drawing.Size(192, 368)
Me.listBox1.TabIndex = 0
Me.listBox2.Anchor = System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right
Me.listBox2.Location = New System.Drawing.Point(208, 41)
Me.listBox2.Name = "listBox2"
Me.listBox2.Size = New System.Drawing.Size(228, 368)
Me.listBox2.TabIndex = 3
Me.BackColor = System.Drawing.Color.Beige
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.listBox2, Me.listBox1})
Me.Location = New System.Drawing.Point(500, 400)
Me.Name = "IToolboxServiceControl"
Me.Size = New System.Drawing.Size(442, 422)
Me.ResumeLayout(False)
End Sub
End Class
' This designer passes window messages to the controls at design time.
Public Class WindowMessageDesigner
Inherits System.Windows.Forms.Design.ControlDesigner
Public Sub New()
End Sub
' Window procedure override passes events to control.
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
If m.HWnd.Equals(Me.Control.Handle) Then
MyBase.WndProc(m)
Else
Me.DefWndProc(m)
End If
End Sub
End Class
The following code example provides a component that uses the IToolboxService to add a "Text" data format handler, or ToolboxItemCreatorCallback, to the toolbox. The data creator callback delegate passes any text data pasted to the toolbox and dragged onto a form to a custom ToolboxItem that creates a TextBox containing the text.
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <System.dll>
using namespace System;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Drawing;
using namespace System::Drawing::Design;
using namespace System::Windows::Forms;
using namespace System::Security::Permissions;
namespace TextDataTextBoxComponent
{
// Custom toolbox item creates a TextBox and sets its Text property
// to the constructor-specified text.
[PermissionSetAttribute(SecurityAction::Demand, Name="FullTrust")]
public ref class TextToolboxItem: public ToolboxItem
{
private:
String^ text;
delegate void SetTextMethodHandler( Control^ c, String^ text );
public:
TextToolboxItem( String^ text )
: ToolboxItem()
{
this->text = text;
}
protected:
// ToolboxItem::CreateComponentsCore to create the TextBox
// and link a method to set its Text property.
virtual array<IComponent^>^ CreateComponentsCore( IDesignerHost^ host ) override
{
TextBox^ textbox = dynamic_cast<TextBox^>(host->CreateComponent( TextBox::typeid ));
// Because the designer resets the text of the textbox, use
// a SetTextMethodHandler to set the text to the value of
// the text data.
Control^ c = dynamic_cast<Control^>(host->RootComponent);
array<Object^>^temp0 = {textbox,text};
c->BeginInvoke( gcnew SetTextMethodHandler( this, &TextToolboxItem::OnSetText ), temp0 );
array<IComponent^>^temp1 = {textbox};
return temp1;
}
private:
// Method to set the text property of a TextBox after it is initialized.
void OnSetText( Control^ c, String^ text )
{
c->Text = text;
}
};
// Component that adds a "Text" data format ToolboxItemCreatorCallback
// to the Toolbox. This component uses a custom ToolboxItem that
// creates a TextBox containing the text data.
public ref class TextDataTextBoxComponent: public Component
{
private:
bool creatorAdded;
IToolboxService^ ts;
public:
TextDataTextBoxComponent()
{
creatorAdded = false;
}
property System::ComponentModel::ISite^ Site
{
// ISite to register TextBox creator
virtual System::ComponentModel::ISite^ get() override
{
return __super::Site;
}
virtual void set( System::ComponentModel::ISite^ value ) override
{
if ( value != nullptr )
{
__super::Site = value;
if ( !creatorAdded )
AddTextTextBoxCreator();
}
else
{
if ( creatorAdded )
RemoveTextTextBoxCreator();
__super::Site = value;
}
}
}
private:
// Adds a "Text" data format creator to the toolbox that creates
// a textbox from a text fragment pasted to the toolbox.
void AddTextTextBoxCreator()
{
ts = dynamic_cast<IToolboxService^>(GetService( IToolboxService::typeid ));
if ( ts != nullptr )
{
ToolboxItemCreatorCallback^ textCreator =
gcnew ToolboxItemCreatorCallback(
this,
&TextDataTextBoxComponent::CreateTextBoxForText );
try
{
ts->AddCreator(
textCreator,
"Text",
dynamic_cast<IDesignerHost^>(GetService( IDesignerHost::typeid )) );
creatorAdded = true;
}
catch ( Exception^ ex )
{
MessageBox::Show( ex->ToString(), "Exception Information" );
}
}
}
// Removes any "Text" data format creator from the toolbox.
void RemoveTextTextBoxCreator()
{
if ( ts != nullptr )
{
ts->RemoveCreator(
"Text",
dynamic_cast<IDesignerHost^>(GetService( IDesignerHost::typeid )) );
creatorAdded = false;
}
}
// ToolboxItemCreatorCallback delegate format method to create
// the toolbox item.
ToolboxItem^ CreateTextBoxForText( Object^ serializedObject, String^ format )
{
IDataObject^ o = gcnew DataObject(dynamic_cast<IDataObject^>(serializedObject));
if( o->GetDataPresent("System::String", true) )
{
String^ toolboxText = dynamic_cast<String^>(o->GetData( "System::String", true ));
return( gcnew TextToolboxItem( toolboxText ));
}
return nullptr;
}
public:
~TextDataTextBoxComponent()
{
if ( creatorAdded )
RemoveTextTextBoxCreator();
}
};
}
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Design;
using System.Security.Permissions;
using System.Windows.Forms;
namespace TextDataTextBoxComponent
{
// Component that adds a "Text" data format ToolboxItemCreatorCallback
// to the Toolbox. This component uses a custom ToolboxItem that
// creates a TextBox containing the text data.
public class TextDataTextBoxComponent : Component
{
private bool creatorAdded = false;
private IToolboxService ts;
public TextDataTextBoxComponent()
{
}
// ISite override to register TextBox creator
public override System.ComponentModel.ISite Site
{
get
{
return base.Site;
}
set
{
if( value != null )
{
base.Site = value;
if (!creatorAdded)
{
AddTextTextBoxCreator();
}
}
else
{
if (creatorAdded)
{
RemoveTextTextBoxCreator();
}
base.Site = value;
}
}
}
// Adds a "Text" data format creator to the toolbox that creates
// a textbox from a text fragment pasted to the toolbox.
private void AddTextTextBoxCreator()
{
ts = (IToolboxService)GetService(typeof(IToolboxService));
if (ts != null)
{
ToolboxItemCreatorCallback textCreator =
new ToolboxItemCreatorCallback(this.CreateTextBoxForText);
try
{
ts.AddCreator(
textCreator,
"Text",
(IDesignerHost)GetService(typeof(IDesignerHost)));
creatorAdded = true;
}
catch(Exception ex)
{
MessageBox.Show(
ex.ToString(),
"Exception Information");
}
}
}
// Removes any "Text" data format creator from the toolbox.
private void RemoveTextTextBoxCreator()
{
if (ts != null)
{
ts.RemoveCreator(
"Text",
(IDesignerHost)GetService(typeof(IDesignerHost)));
creatorAdded = false;
}
}
// ToolboxItemCreatorCallback delegate format method to create
// the toolbox item.
private ToolboxItem CreateTextBoxForText(
object serializedObject,
string format)
{
DataObject o = new DataObject((IDataObject)serializedObject);
string[] formats = o.GetFormats();
if (o.GetDataPresent("System.String", true))
{
string toolboxText = (string)(o.GetData("System.String", true));
return (new TextToolboxItem(toolboxText));
}
return null;
}
protected override void Dispose(bool disposing)
{
if (creatorAdded)
{
RemoveTextTextBoxCreator();
}
}
}
// Custom toolbox item creates a TextBox and sets its Text property
// to the constructor-specified text.
public class TextToolboxItem : ToolboxItem
{
private string text;
private delegate void SetTextMethodHandler(Control c, string text);
public TextToolboxItem(string text) : base()
{
this.text = text;
}
// ToolboxItem.CreateComponentsCore override to create the TextBox
// and link a method to set its Text property.
protected override IComponent[] CreateComponentsCore(IDesignerHost host)
{
System.Windows.Forms.TextBox textbox =
(TextBox)host.CreateComponent(typeof(TextBox));
// Because the designer resets the text of the textbox, use
// a SetTextMethodHandler to set the text to the value of
// the text data.
Control c = host.RootComponent as Control;
c.BeginInvoke(
new SetTextMethodHandler(OnSetText),
new object[] {textbox, text});
return new System.ComponentModel.IComponent[] { textbox };
}
// Method to set the text property of a TextBox after it is initialized.
private void OnSetText(Control c, string text)
{
c.Text = text;
}
}
}
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.Drawing.Design
Imports System.Security.Permissions
Imports System.Windows.Forms
' Component that adds a "Text" data format ToolboxItemCreatorCallback
' to the Toolbox. This component uses a custom ToolboxItem that
' creates a TextBox containing the text data.
<PermissionSetAttribute(SecurityAction.Demand, Name:="FullTrust")> _
Public Class TextDataTextBoxComponent
Inherits System.ComponentModel.Component
Private creatorAdded As Boolean = False
Private ts As IToolboxService
Public Sub New()
End Sub
' ISite override to register TextBox creator
Public Overrides Property Site() As System.ComponentModel.ISite
Get
Return MyBase.Site
End Get
Set(ByVal Value As System.ComponentModel.ISite)
If (Value IsNot Nothing) Then
MyBase.Site = Value
If Not creatorAdded Then
AddTextTextBoxCreator()
End If
Else
If creatorAdded Then
RemoveTextTextBoxCreator()
End If
MyBase.Site = Value
End If
End Set
End Property
' Adds a "Text" data format creator to the toolbox that creates
' a textbox from a text fragment pasted to the toolbox.
Private Sub AddTextTextBoxCreator()
ts = CType(GetService(GetType(IToolboxService)), IToolboxService)
If (ts IsNot Nothing) Then
Dim textCreator As _
New ToolboxItemCreatorCallback(AddressOf Me.CreateTextBoxForText)
Try
ts.AddCreator( _
textCreator, _
"Text", _
CType(GetService(GetType(IDesignerHost)), IDesignerHost))
creatorAdded = True
Catch ex As Exception
MessageBox.Show(ex.ToString(), "Exception Information")
End Try
End If
End Sub
' Removes any "Text" data format creator from the toolbox.
Private Sub RemoveTextTextBoxCreator()
If (ts IsNot Nothing) Then
ts.RemoveCreator( _
"Text", _
CType(GetService(GetType(IDesignerHost)), IDesignerHost))
creatorAdded = False
End If
End Sub
' ToolboxItemCreatorCallback delegate format method to create
' the toolbox item.
Private Function CreateTextBoxForText( _
ByVal serializedObject As Object, _
ByVal format As String) As ToolboxItem
Dim o As New DataObject(CType(serializedObject, IDataObject))
Dim formats As String() = o.GetFormats()
If o.GetDataPresent("System.String", True) Then
Return New TextToolboxItem(CStr(o.GetData("System.String", True)))
End If
Return Nothing
End Function
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If creatorAdded Then
RemoveTextTextBoxCreator()
End If
End Sub
End Class
' Custom toolbox item creates a TextBox and sets its Text property
' to the constructor-specified text.
<PermissionSetAttribute(SecurityAction.Demand, Name:="FullTrust")> _
Public Class TextToolboxItem
Inherits System.Drawing.Design.ToolboxItem
Private [text] As String
Delegate Sub SetTextMethodHandler( _
ByVal c As Control, _
ByVal [text] As String)
Public Sub New(ByVal [text] As String)
Me.text = [text]
End Sub
' ToolboxItem.CreateComponentsCore override to create the TextBox
' and link a method to set its Text property.
<PermissionSetAttribute(SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Function CreateComponentsCore(ByVal host As IDesignerHost) As IComponent()
Dim textbox As TextBox = CType(host.CreateComponent(GetType(TextBox)), TextBox)
' Because the designer resets the text of the textbox, use
' a SetTextMethodHandler to set the text to the value of
' the text data.
Dim c As Control = host.RootComponent
c.BeginInvoke( _
New SetTextMethodHandler(AddressOf OnSetText), _
New Object() {textbox, [text]})
Return New System.ComponentModel.IComponent() {textbox}
End Function
' Method to set the text property of a TextBox after it is initialized.
Private Sub OnSetText(ByVal c As Control, ByVal [text] As String)
c.Text = [text]
End Sub
End Class
Remarks
The IToolboxService interface provides properties and methods for adding and removing toolbox items and toolbox creator callback delegates, serializing and deserializing toolbox items, and retrieving toolbox state information and managing toolbox state.
You can retrieve information about the contents of the toolbox with the following methods:
The CategoryNames property indicates the categories currently available on the toolbox.
The SelectedCategory property indicates the currently selected toolbox category.
The GetToolboxItems method retrieves the items on the toolbox, optionally filtered by a specified toolbox category.
The GetSelectedToolboxItem method retrieves the currently selected ToolboxItem.
The SetSelectedToolboxItem method selects the specified ToolboxItem as the current toolbox item.
The IsSupported method indicates whether the specified serialized object, if it is a ToolboxItem, is supported by the specified designer host, or whether it matches the specified attributes.
The IsToolboxItem method indicates whether the specified serialized object is a ToolboxItem.
You can add and remove toolbox items with the following methods:
The AddToolboxItem method adds a ToolboxItem to the toolbox, creating the optionally specified category if it does not exist.
The AddLinkedToolboxItem method adds a ToolboxItem that is only enabled for the current project to the toolbox.
The RemoveToolboxItem method removes the specified ToolboxItem.
The AddCreator method adds a ToolboxItemCreatorCallback delegate capable of converting some type of data stored on the toolbox to a ToolboxItem.
The RemoveCreator method removes any ToolboxItemCreatorCallback delegates for the specified data type.
You can refresh the toolbox, mark a toolbox item as used, or set the mouse cursor to a cursor that represents the current toolbox item using the following methods:
The Refresh method refreshes the toolbox display to reflect the current state of the toolbox items.
The SelectedToolboxItemUsed method signals the toolbox that the selected toolbox item has been used.
The SetCursor method sets the mouse cursor to a cursor that represents the current toolbox item.
You can use the toolbox to serialize or deserialize a toolbox item using the following methods:
The DeserializeToolboxItem method attempts to return a ToolboxItem from the specified serialized toolbox item object.
The SerializeToolboxItem method returns a serialized object representing the specified ToolboxItem.
Properties
| CategoryNames |
Gets the names of all the tool categories currently on the toolbox. |
| SelectedCategory |
Gets or sets the name of the currently selected tool category from the toolbox. |
Methods
| AddCreator(ToolboxItemCreatorCallback, String, IDesignerHost) |
Adds a new toolbox item creator for a specified data format and designer host. |
| AddCreator(ToolboxItemCreatorCallback, String) |
Adds a new toolbox item creator for a specified data format. |
| AddLinkedToolboxItem(ToolboxItem, IDesignerHost) |
Adds the specified project-linked toolbox item to the toolbox. |
| AddLinkedToolboxItem(ToolboxItem, String, IDesignerHost) |
Adds the specified project-linked toolbox item to the toolbox in the specified category. |
| AddToolboxItem(ToolboxItem, String) |
Adds the specified toolbox item to the toolbox in the specified category. |
| AddToolboxItem(ToolboxItem) |
Adds the specified toolbox item to the toolbox. |
| DeserializeToolboxItem(Object, IDesignerHost) |
Gets a toolbox item from the specified object that represents a toolbox item in serialized form, using the specified designer host. |
| DeserializeToolboxItem(Object) |
Gets a toolbox item from the specified object that represents a toolbox item in serialized form. |
| GetSelectedToolboxItem() |
Gets the currently selected toolbox item. |
| GetSelectedToolboxItem(IDesignerHost) |
Gets the currently selected toolbox item if it is available to all designers, or if it supports the specified designer. |
| GetToolboxItems() |
Gets the entire collection of toolbox items from the toolbox. |
| GetToolboxItems(IDesignerHost) |
Gets the collection of toolbox items that are associated with the specified designer host from the toolbox. |
| GetToolboxItems(String, IDesignerHost) |
Gets the collection of toolbox items that are associated with the specified designer host and category from the toolbox. |
| GetToolboxItems(String) |
Gets a collection of toolbox items from the toolbox that match the specified category. |
| IsSupported(Object, ICollection) |
Gets a value indicating whether the specified object which represents a serialized toolbox item matches the specified attributes. |
| IsSupported(Object, IDesignerHost) |
Gets a value indicating whether the specified object which represents a serialized toolbox item can be used by the specified designer host. |
| IsToolboxItem(Object, IDesignerHost) |
Gets a value indicating whether the specified object is a serialized toolbox item, using the specified designer host. |
| IsToolboxItem(Object) |
Gets a value indicating whether the specified object is a serialized toolbox item. |
| Refresh() |
Refreshes the state of the toolbox items. |
| RemoveCreator(String, IDesignerHost) |
Removes a previously added toolbox creator that is associated with the specified data format and the specified designer host. |
| RemoveCreator(String) |
Removes a previously added toolbox item creator of the specified data format. |
| RemoveToolboxItem(ToolboxItem, String) |
Removes the specified toolbox item from the toolbox. |
| RemoveToolboxItem(ToolboxItem) |
Removes the specified toolbox item from the toolbox. |
| SelectedToolboxItemUsed() |
Notifies the toolbox service that the selected tool has been used. |
| SerializeToolboxItem(ToolboxItem) |
Gets a serializable object that represents the specified toolbox item. |
| SetCursor() |
Sets the current application's cursor to a cursor that represents the currently selected tool. |
| SetSelectedToolboxItem(ToolboxItem) |
Selects the specified toolbox item. |
Applies to
GitHub पर हमारे साथ सहयोग करें
इस सामग्री का स्रोत GitHub पर पाया जा सकता है, जहाँ आप समस्याएँ बना और समीक्षा भी कर सकते हैं और अनुरोध खींच सकते हैं. अधिक जानकारी के लिए, हमारे योगदानकर्ता गाइड देखें.
