IWindowsFormsEditorService 接口

为 UITypeEditor 提供一个接口，用于显示 Windows 窗体，或者在设计模式下在属性网格控件的下拉区域中显示控件。

**命名空间:**System.Windows.Forms.Design
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）

语法

声明
Public Interface IWindowsFormsEditorService
用法
Dim instance As IWindowsFormsEditorService

public interface IWindowsFormsEditorService

public interface class IWindowsFormsEditorService

public interface IWindowsFormsEditorService

public interface IWindowsFormsEditorService

备注

IWindowsFormsEditorService 只能通过 PropertyGrid 控件的 GetService 方法使用。

此服务通常用于显示来自 UITypeEditor 的 EditValue 方法的窗体。当 PropertyGrid 调用 UITypeEditor 的 EditValue 方法来提供用于编辑属性值的用户界面时，会将对 IServiceProvider 的引用传递给 EditValue 方法，IServiceProvider 通常可提供 IWindowsFormsEditorService 的实例。此服务的方法可用于显示对话框和窗体，或者用于在下拉容器内显示 Control，该容器显示在当前正在编辑的值字段区域附近的属性网格的顶部。

示例

下面的示例提供一个示例 UITypeEditor，它使用 IWindowsFormsEditorService 显示用于用户输入的 Form。

Imports System
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.Drawing.Design
Imports System.Windows.Forms
Imports System.Windows.Forms.Design

' Example UITypeEditor that uses the IWindowsFormsEditorService 
' to display a Form.
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> Public Class TestDialogEditor
   Inherits System.Drawing.Design.UITypeEditor
   
   Public Sub New()
    End Sub

    Public Overloads Overrides Function GetEditStyle(ByVal context As System.ComponentModel.ITypeDescriptorContext) As System.Drawing.Design.UITypeEditorEditStyle
        ' Indicates that this editor can display a Form-based interface.
        Return UITypeEditorEditStyle.Modal
    End Function

    Public Overloads Overrides Function EditValue(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal provider As System.IServiceProvider, ByVal value As Object) As Object

        ' Attempts to obtain an IWindowsFormsEditorService.
        Dim edSvc As IWindowsFormsEditorService = CType(provider.GetService(GetType(IWindowsFormsEditorService)), IWindowsFormsEditorService)
        If edSvc Is Nothing Then
            Return Nothing
        End If

        ' Displays a StringInputDialog Form to get a user-adjustable 
        ' string value.
        Dim form As New StringInputDialog(CStr(value))
        If edSvc.ShowDialog(form) = DialogResult.OK Then
            Return form.inputTextBox.Text
        End If

        ' If OK was not pressed, return the original value
        Return value

    End Function
End Class

' Example Form for entering a string.
Friend Class StringInputDialog
    Inherits System.Windows.Forms.Form

    Private ok_button As System.Windows.Forms.Button
    Private cancel_button As System.Windows.Forms.Button
    Public inputTextBox As System.Windows.Forms.TextBox

    Public Sub New(ByVal [text] As String)
        InitializeComponent()
        inputTextBox.Text = [text]
    End Sub

    Private Sub InitializeComponent()
        Me.ok_button = New System.Windows.Forms.Button()
        Me.cancel_button = New System.Windows.Forms.Button()
        Me.inputTextBox = New System.Windows.Forms.TextBox()
        Me.SuspendLayout()
        Me.ok_button.Anchor = System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right
        Me.ok_button.Location = New System.Drawing.Point(180, 43)
        Me.ok_button.Name = "ok_button"
        Me.ok_button.TabIndex = 1
        Me.ok_button.Text = "OK"
        Me.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK
        Me.cancel_button.Anchor = System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right
        Me.cancel_button.Location = New System.Drawing.Point(260, 43)
        Me.cancel_button.Name = "cancel_button"
        Me.cancel_button.TabIndex = 2
        Me.cancel_button.Text = "Cancel"
        Me.cancel_button.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.inputTextBox.Location = New System.Drawing.Point(6, 9)
        Me.inputTextBox.Name = "inputTextBox"
        Me.inputTextBox.Size = New System.Drawing.Size(327, 20)
        Me.inputTextBox.TabIndex = 0
        Me.inputTextBox.Text = ""
        Me.inputTextBox.Anchor = System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right
        Me.ClientSize = New System.Drawing.Size(342, 73)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.inputTextBox, Me.cancel_button, Me.ok_button})
        Me.MinimumSize = New System.Drawing.Size(350, 100)
        Me.Name = "StringInputDialog"
        Me.Text = "String Input Dialog"
        Me.ResumeLayout(False)
    End Sub

End Class

' Provides an example control that displays instructions in design mode,
' with which the example UITypeEditor is associated.
Public Class WinFormsEdServiceDialogExampleControl
    Inherits UserControl

    <EditorAttribute(GetType(TestDialogEditor), GetType(UITypeEditor))> _
    Public Property TestDialogString() As String
        Get
            Return localDialogTestString
        End Get
        Set(ByVal Value As String)
            localDialogTestString = Value
        End Set
    End Property
    Private localDialogTestString As String

    Public Sub New()
        localDialogTestString = "Test String"
        Me.Size = New Size(210, 74)
        Me.BackColor = Color.Beige
    End Sub

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
        If Me.DesignMode Then
            e.Graphics.DrawString("Use the Properties window to show", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 5)
            e.Graphics.DrawString("a Form dialog box, using the", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 17)
            e.Graphics.DrawString("IWindowsFormsEditorService, for", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 29)
            e.Graphics.DrawString("configuring this control's", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 41)
            e.Graphics.DrawString("TestDialogString property.", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 53)
        Else
            e.Graphics.DrawString("This example requires design mode.", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 5)
        End If
    End Sub

End Class

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace IWindowsFormsEditorServiceExample
{   
    // Example UITypeEditor that uses the IWindowsFormsEditorService 
    // to display a Form.
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")] 
    public class TestDialogEditor : System.Drawing.Design.UITypeEditor
    {
        public TestDialogEditor()
        {
        }

        public override System.Drawing.Design.UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
        {
            // Indicates that this editor can display a Form-based interface.
            return UITypeEditorEditStyle.Modal;
        }

        public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, System.IServiceProvider provider, object value)
        {
            // Attempts to obtain an IWindowsFormsEditorService.
            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
            if( edSvc == null )
                return null;         
            
            // Displays a StringInputDialog Form to get a user-adjustable 
            // string value.
            StringInputDialog form = new StringInputDialog((string)value);
            if( edSvc.ShowDialog(form) == DialogResult.OK )
                return form.inputTextBox.Text;

            // If OK was not pressed, return the original value
            return value;
        }        
    }

    // Example Form for entering a string.
    internal class StringInputDialog : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button ok_button;
        private System.Windows.Forms.Button cancel_button;
        public System.Windows.Forms.TextBox inputTextBox;

        public StringInputDialog(string text)
        {
            InitializeComponent();
            inputTextBox.Text = text;
        }

        private void InitializeComponent()
        {
            this.ok_button = new System.Windows.Forms.Button();
            this.cancel_button = new System.Windows.Forms.Button();
            this.inputTextBox = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            this.ok_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
            this.ok_button.Location = new System.Drawing.Point(180, 43);
            this.ok_button.Name = "ok_button";
            this.ok_button.TabIndex = 1;
            this.ok_button.Text = "OK";      
            this.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK;            
            this.cancel_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
            this.cancel_button.Location = new System.Drawing.Point(260, 43);
            this.cancel_button.Name = "cancel_button";
            this.cancel_button.TabIndex = 2;
            this.cancel_button.Text = "Cancel";            
            this.cancel_button.DialogResult = System.Windows.Forms.DialogResult.Cancel;
            this.inputTextBox.Location = new System.Drawing.Point(6, 9);
            this.inputTextBox.Name = "inputTextBox";
            this.inputTextBox.Size = new System.Drawing.Size(327, 20);
            this.inputTextBox.TabIndex = 0;
            this.inputTextBox.Text = "";            
            this.inputTextBox.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);
            this.ClientSize = new System.Drawing.Size(342, 73);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.inputTextBox,
                                                                          this.cancel_button,
                                                                          this.ok_button});
            this.MinimumSize = new System.Drawing.Size(350, 100);
            this.Name = "StringInputDialog";
            this.Text = "String Input Dialog";
            this.ResumeLayout(false);
        }       
    }

    // Provides an example control that displays instructions in design mode,
    // with which the example UITypeEditor is associated.
    public class WinFormsEdServiceDialogExampleControl : UserControl
    {
        [EditorAttribute(typeof(TestDialogEditor), typeof(UITypeEditor))]
        public string TestDialogString
        {
            get
            {
                return localDialogTestString;
            }
            set
            {
                localDialogTestString = value;
            }
        }
        private string localDialogTestString;
      
        public WinFormsEdServiceDialogExampleControl()
        {
            localDialogTestString = "Test String"; 
            this.Size = new Size(210, 74);
            this.BackColor = Color.Beige;
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            if( this.DesignMode )
            {
                e.Graphics.DrawString("Use the Properties window to show", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 5);
                e.Graphics.DrawString("a Form dialog box, using the", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 17);
                e.Graphics.DrawString("IWindowsFormsEditorService, for", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 29);
                e.Graphics.DrawString("configuring this control's", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 41);
                e.Graphics.DrawString("TestDialogString property.", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 53);
            }
            else
            {
                e.Graphics.DrawString("This example requires design mode.", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 5);
            }
        }
    }
}

#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::Windows::Forms::Design;
using namespace System::Security::Permissions;

namespace IWindowsFormsEditorServiceExample
{
   // Example Form for entering a string.
   private ref class StringInputDialog: public System::Windows::Forms::Form
   {
   private:
      System::Windows::Forms::Button^ ok_button;
      System::Windows::Forms::Button^ cancel_button;

   public:
      System::Windows::Forms::TextBox^ inputTextBox;
      StringInputDialog( String^ text )
      {
         InitializeComponent();
         inputTextBox->Text = text;
      }

   private:
      void InitializeComponent()
      {
         this->ok_button = gcnew System::Windows::Forms::Button;
         this->cancel_button = gcnew System::Windows::Forms::Button;
         this->inputTextBox = gcnew System::Windows::Forms::TextBox;
         this->SuspendLayout();
         this->ok_button->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
         this->ok_button->Location = System::Drawing::Point( 180, 43 );
         this->ok_button->Name = "ok_button";
         this->ok_button->TabIndex = 1;
         this->ok_button->Text = "OK";
         this->ok_button->DialogResult = System::Windows::Forms::DialogResult::OK;
         this->cancel_button->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
         this->cancel_button->Location = System::Drawing::Point( 260, 43 );
         this->cancel_button->Name = "cancel_button";
         this->cancel_button->TabIndex = 2;
         this->cancel_button->Text = "Cancel";
         this->cancel_button->DialogResult = System::Windows::Forms::DialogResult::Cancel;
         this->inputTextBox->Location = System::Drawing::Point( 6, 9 );
         this->inputTextBox->Name = "inputTextBox";
         this->inputTextBox->Size = System::Drawing::Size( 327, 20 );
         this->inputTextBox->TabIndex = 0;
         this->inputTextBox->Text = "";
         this->inputTextBox->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
         this->ClientSize = System::Drawing::Size( 342, 73 );
         array<System::Windows::Forms::Control^>^temp0 = {this->inputTextBox,this->cancel_button,this->ok_button};
         this->Controls->AddRange( temp0 );
         this->MinimumSize = System::Drawing::Size( 350, 100 );
         this->Name = "StringInputDialog";
         this->Text = "String Input Dialog";
         this->ResumeLayout( false );
      }
   };

   // Example UITypeEditor that uses the IWindowsFormsEditorService
   // to display a Form.
   [PermissionSet(SecurityAction::Demand, Name = "FullTrust")]
   public ref class TestDialogEditor: public System::Drawing::Design::UITypeEditor
   {
   public:
      TestDialogEditor(){}

      virtual System::Drawing::Design::UITypeEditorEditStyle GetEditStyle( System::ComponentModel::ITypeDescriptorContext^ context ) override
      {
         // Indicates that this editor can display a Form-based interface.
         return UITypeEditorEditStyle::Modal;
      }

      virtual Object^ EditValue( System::ComponentModel::ITypeDescriptorContext^ context, System::IServiceProvider^ provider, Object^ value ) override
      {
         // Attempts to obtain an IWindowsFormsEditorService.
         IWindowsFormsEditorService^ edSvc = dynamic_cast<IWindowsFormsEditorService^>(provider->GetService( IWindowsFormsEditorService::typeid ));
         if ( edSvc == nullptr )
                  return nullptr;
         
         // Displays a StringInputDialog Form to get a user-adjustable
         // string value.
         StringInputDialog^ form = gcnew StringInputDialog( dynamic_cast<String^>(value) );
         if ( edSvc->ShowDialog( form ) == DialogResult::OK )
                  return form->inputTextBox->Text;

         // If OK was not pressed, return the original value
         return value;
      }
   };

   // Provides an example control that displays instructions in design mode,
   // with which the example UITypeEditor is associated.
   public ref class WinFormsEdServiceDialogExampleControl: public UserControl
   {
   public:

      property String^ TestDialogString 
      {
         [EditorAttribute(IWindowsFormsEditorServiceExample::TestDialogEditor::typeid,UITypeEditor::typeid)]
         String^ get()
         {
            return localDialogTestString;
         }

         void set( String^ value )
         {
            localDialogTestString = value;
         }
      }

   private:
      String^ localDialogTestString;

   public:
      WinFormsEdServiceDialogExampleControl()
      {
         localDialogTestString = "Test String";
         this->Size = System::Drawing::Size( 210, 74 );
         this->BackColor = Color::Beige;
      }

   protected:
      virtual void OnPaint( System::Windows::Forms::PaintEventArgs^ e ) override
      {
         if ( this->DesignMode )
         {
            e->Graphics->DrawString( "Use the Properties window to show", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 5 );
            e->Graphics->DrawString( "a Form dialog box, using the", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 17 );
            e->Graphics->DrawString( "IWindowsFormsEditorService, for", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 29 );
            e->Graphics->DrawString( "configuring this control's", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 41 );
            e->Graphics->DrawString( "TestDialogString property.", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 53 );
         }
         else
         {
            e->Graphics->DrawString( "This example requires design mode.", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 5 );
         }
      }
   };
}

package IWindowsFormsEditorServiceExample; 

import System.*;
import System.ComponentModel.*;
import System.ComponentModel.Design.*;
import System.Drawing.*;
import System.Drawing.Design.*;
import System.Windows.Forms.*;
import System.Windows.Forms.Design.*;

// Example UITypeEditor that uses the IWindowsFormsEditorService 
// to display a Form.
/** @attribute System.Security.Permissions.PermissionSet(System.Security.
    Permissions.SecurityAction.Demand, Name = "FullTrust")
 */
public class TestDialogEditor extends System.Drawing.Design.UITypeEditor
{
    public TestDialogEditor()
    {
    } //TestDialogEditor

    public System.Drawing.Design.UITypeEditorEditStyle GetEditStyle(System.
        ComponentModel.ITypeDescriptorContext context)
    {
        // Indicates that this editor can display a Form-based interface.
        return UITypeEditorEditStyle.Modal;
    } //GetEditStyle

    public Object EditValue(System.ComponentModel.
        ITypeDescriptorContext context, System.IServiceProvider provider,
        Object value)
    {
        // Attempts to obtain an IWindowsFormsEditorService.
        IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.
            GetService(IWindowsFormsEditorService.class.ToType());
        if (edSvc.Equals(null)) {
            return null;
        }
        // Displays a StringInputDialog Form to get a user-adjustable 
        // string value.
        StringInputDialog form = new StringInputDialog((String)value);
        if ((edSvc.ShowDialog(form)).Equals(DialogResult.OK)) {
            return form.inputTextBox.get_Text();
        }
        // If OK was not pressed, return the original value
        return value;
    } //EditValue
} //TestDialogEditor

// Example Form for entering a string.
class StringInputDialog extends System.Windows.Forms.Form
{
    private System.Windows.Forms.Button okButton;
    private System.Windows.Forms.Button cancelButton;
    public System.Windows.Forms.TextBox inputTextBox;
    public StringInputDialog(String text)
    {
        InitializeComponent();
        inputTextBox.set_Text(text);
    } //StringInputDialog

    private void InitializeComponent()
    {
        this.okButton = new System.Windows.Forms.Button();
        this.cancelButton = new System.Windows.Forms.Button();
        this.inputTextBox = new System.Windows.Forms.TextBox();
        this.SuspendLayout();
        this.okButton.set_Anchor(System.Windows.Forms.AnchorStyles.Bottom 
            | System.Windows.Forms.AnchorStyles.Right);
        this.okButton.set_Location(new System.Drawing.Point(180, 43));
        this.okButton.set_Name("ok_Button");
        this.okButton.set_TabIndex(1);
        this.okButton.set_Text("OK");
        this.okButton.set_DialogResult(System.Windows.Forms.DialogResult.OK);
        this.cancelButton.set_Anchor(System.Windows.Forms.AnchorStyles.Bottom 
            | System.Windows.Forms.AnchorStyles.Right);
        this.cancelButton.set_Location(new System.Drawing.Point(260, 43));
        this.cancelButton.set_Name("cancel_Button");
        this.cancelButton.set_TabIndex(2);
        this.cancelButton.set_Text("Cancel");
        this.cancelButton.set_DialogResult(System.Windows.Forms.DialogResult.
            Cancel);
        this.inputTextBox.set_Location(new System.Drawing.Point(6, 9));
        this.inputTextBox.set_Name("inputTextBox");
        this.inputTextBox.set_Size(new System.Drawing.Size(327, 20));
        this.inputTextBox.set_TabIndex(0);
        this.inputTextBox.set_Text("");
        this.inputTextBox.set_Anchor(System.Windows.Forms.AnchorStyles.Top |
            System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.
            AnchorStyles.Right);
        this.set_ClientSize(new System.Drawing.Size(342, 73));
        this.get_Controls().AddRange(new System.Windows.Forms.Control[] { this.
            inputTextBox, this.cancelButton, this.okButton });
        this.set_MinimumSize(new System.Drawing.Size(350, 100));
        this.set_Name("StringInputDialog");
        this.set_Text("String Input Dialog");
        this.ResumeLayout(false);
    } //InitializeComponent
} //StringInputDialog

// Provides an example control that displays instructions in design mode,
// with which the example UITypeEditor is associated.
public class WinFormsEdServiceDialogExampleControl extends UserControl
{
    /** @attribute EditorAttribute(TestDialogEditor.class, UITypeEditor.class)
     */
    /** @property 
     */
    public String get_TestDialogString()
    {
        return localDialogTestString;
    } //get_TestDialogString

    /** @property 
     */
    public void set_TestDialogString(String value)
    {
        localDialogTestString = value;
    } //set_TestDialogString

    private String localDialogTestString;

    public WinFormsEdServiceDialogExampleControl()
    {
        localDialogTestString = "Test String";
        this.set_Size(new Size(210, 74));
        this.set_BackColor(Color.get_Beige());
    } //WinFormsEdServiceDialogExampleControl

    protected void OnPaint(System.Windows.Forms.PaintEventArgs e)
    {
        if (this.get_DesignMode()) {
            e.get_Graphics().DrawString("Use the Properties window to show", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 5, 5);
            e.get_Graphics().DrawString("a Form dialog box, using the", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 5, 17);
            e.get_Graphics().DrawString("IWindowsFormsEditorService, for",
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 5, 29);
            e.get_Graphics().DrawString("configuring this control's", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 5, 41);
            e.get_Graphics().DrawString("TestDialogString property.", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 5, 53);
        }
        else {
            e.get_Graphics().DrawString("This example requires design mode.", 
                new Font("Arial", 8), new SolidBrush(Color.get_Black()), 5, 5);
        }
    } //OnPaint
} //WinFormsEdServiceDialogExampleControl

下面的示例提供一个示例 UITypeEditor，它使用 IWindowsFormsEditorService 显示用于用户输入的下拉 UserControl。

Imports System
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.Drawing.Design
Imports System.Windows.Forms
Imports System.Windows.Forms.Design

' Example UITypeEditor that uses the IWindowsFormsEditorService to 
' display a drop-down control.
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class TestDropDownEditor
   Inherits System.Drawing.Design.UITypeEditor
   
   Public Sub New()
    End Sub
   
    Public Overloads Overrides Function GetEditStyle(ByVal context As System.ComponentModel.ITypeDescriptorContext) As System.Drawing.Design.UITypeEditorEditStyle
        ' Indicates that this editor can display a control-based 
        ' drop-down interface.
        Return UITypeEditorEditStyle.DropDown
    End Function
    
    Public Overloads Overrides Function EditValue(ByVal context As System.ComponentModel.ITypeDescriptorContext, ByVal provider As System.IServiceProvider, ByVal value As Object) As Object

        ' Attempts to obtain an IWindowsFormsEditorService.
        Dim edSvc As IWindowsFormsEditorService = CType(provider.GetService(GetType(IWindowsFormsEditorService)), IWindowsFormsEditorService)
        If edSvc Is Nothing Then
            Return value
        End If

        ' Displays a drop-down control.
        Dim inputControl As New StringInputControl(CStr(value), edSvc)
        edSvc.DropDownControl(inputControl)
        Return inputControl.inputTextBox.Text
    End Function

End Class

' Example control for entering a string.
Friend Class StringInputControl
    Inherits System.Windows.Forms.UserControl

    Public inputTextBox As System.Windows.Forms.TextBox
    Private WithEvents ok_button As System.Windows.Forms.Button
    Private WithEvents cancel_button As System.Windows.Forms.Button
    Private edSvc As IWindowsFormsEditorService

    Public Sub New(ByVal [text] As String, ByVal edSvc As IWindowsFormsEditorService)
        InitializeComponent()
        inputTextBox.Text = [text]
        ' Stores IWindowsFormsEditorService reference to use to 
        ' close the control.
        Me.edSvc = edSvc
    End Sub

    Private Sub InitializeComponent()
        Me.inputTextBox = New System.Windows.Forms.TextBox()
        Me.ok_button = New System.Windows.Forms.Button()
        Me.cancel_button = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        Me.inputTextBox.Anchor = System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right
        Me.inputTextBox.Location = New System.Drawing.Point(6, 7)
        Me.inputTextBox.Name = "inputTextBox"
        Me.inputTextBox.Size = New System.Drawing.Size(336, 20)
        Me.inputTextBox.TabIndex = 0
        Me.inputTextBox.Text = ""
        Me.ok_button.Anchor = System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right
        Me.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK
        Me.ok_button.Location = New System.Drawing.Point(186, 38)
        Me.ok_button.Name = "ok_button"
        Me.ok_button.TabIndex = 1
        Me.ok_button.Text = "OK"
        Me.cancel_button.Anchor = System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right
        Me.cancel_button.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.cancel_button.Location = New System.Drawing.Point(267, 38)
        Me.cancel_button.Name = "cancel_button"
        Me.cancel_button.TabIndex = 2
        Me.cancel_button.Text = "Cancel"
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.cancel_button, Me.ok_button, Me.inputTextBox})
        Me.Name = "StringInputControl"
        Me.Size = New System.Drawing.Size(350, 70)
        Me.ResumeLayout(False)
    End Sub

    Private Sub CloseControl(ByVal sender As Object, ByVal e As EventArgs) Handles ok_button.Click, cancel_button.Click
        edSvc.CloseDropDown()
    End Sub

End Class

' Provides an example control that displays instructions in design mode,
' with which the example UITypeEditor is associated.
Public Class WinFormsEdServiceDropDownExampleControl
    Inherits UserControl

    <EditorAttribute(GetType(TestDropDownEditor), GetType(UITypeEditor))> _
    Public Property TestDropDownString() As String
        Get
            Return localDropDownTestString
        End Get
        Set(ByVal Value As String)
            localDropDownTestString = Value
        End Set
    End Property
    Private localDropDownTestString As String

    Public Sub New()
        localDropDownTestString = "Test String"
        Me.Size = New Size(210, 74)
        Me.BackColor = Color.Beige
    End Sub

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
        If Me.DesignMode Then
            e.Graphics.DrawString("Use the Properties window to show", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 5)
            e.Graphics.DrawString("a drop-down control, using the", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 17)
            e.Graphics.DrawString("IWindowsFormsEditorService, for", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 29)
            e.Graphics.DrawString("configuring this control's", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 41)
            e.Graphics.DrawString("TestDropDownString property.", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 53)
        Else
            e.Graphics.DrawString("This example requires design mode.", New Font("Arial", 8), New SolidBrush(Color.Black), 5, 5)
        End If
    End Sub

End Class

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace IWindowsFormsEditorServiceExample
{   
    // Example UITypeEditor that uses the IWindowsFormsEditorService to 
    // display a drop-down control.
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")] 
    public class TestDropDownEditor : System.Drawing.Design.UITypeEditor
    {
        public TestDropDownEditor()
        {
        }
    
        public override System.Drawing.Design.UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
        {
            // Indicates that this editor can display a control-based 
            // drop-down interface.
            return UITypeEditorEditStyle.DropDown;
        }
    
        public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, System.IServiceProvider provider, object value)
        {
            // Attempts to obtain an IWindowsFormsEditorService.
            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
            if( edSvc == null )
                return value;       
            
            // Displays a drop-down control.
            StringInputControl inputControl = new StringInputControl((string)value, edSvc);
            edSvc.DropDownControl(inputControl);
            return inputControl.inputTextBox.Text;
        }
    }

    // Example control for entering a string.
    internal class StringInputControl : System.Windows.Forms.UserControl
    {
        public System.Windows.Forms.TextBox inputTextBox;
        private System.Windows.Forms.Button ok_button;
        private System.Windows.Forms.Button cancel_button;
        private IWindowsFormsEditorService edSvc;

        public StringInputControl(string text, IWindowsFormsEditorService edSvc)
        {
            InitializeComponent();
            inputTextBox.Text = text;
            // Stores IWindowsFormsEditorService reference to use to 
            // close the control.
            this.edSvc = edSvc;
        }

        private void InitializeComponent()
        {
            this.inputTextBox = new System.Windows.Forms.TextBox();
            this.ok_button = new System.Windows.Forms.Button();
            this.cancel_button = new System.Windows.Forms.Button();
            this.SuspendLayout();
            this.inputTextBox.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);
            this.inputTextBox.Location = new System.Drawing.Point(6, 7);
            this.inputTextBox.Name = "inputTextBox";
            this.inputTextBox.Size = new System.Drawing.Size(336, 20);
            this.inputTextBox.TabIndex = 0;
            this.inputTextBox.Text = "";
            this.ok_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
            this.ok_button.DialogResult = System.Windows.Forms.DialogResult.OK;
            this.ok_button.Location = new System.Drawing.Point(186, 38);
            this.ok_button.Name = "ok_button";
            this.ok_button.TabIndex = 1;
            this.ok_button.Text = "OK";
            this.ok_button.Click += new EventHandler(this.CloseControl);
            this.cancel_button.Anchor = (System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right);
            this.cancel_button.DialogResult = System.Windows.Forms.DialogResult.Cancel;            
            this.cancel_button.Location = new System.Drawing.Point(267, 38);
            this.cancel_button.Name = "cancel_button";
            this.cancel_button.TabIndex = 2;
            this.cancel_button.Text = "Cancel";
            this.cancel_button.Click += new EventHandler(this.CloseControl);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.cancel_button,
                                                                          this.ok_button,
                                                                          this.inputTextBox});
            this.Name = "StringInputControl";
            this.Size = new System.Drawing.Size(350, 70);
            this.ResumeLayout(false);
        }

        private void CloseControl(object sender, EventArgs e)
        {
            edSvc.CloseDropDown();
        }
    }
    
    // Provides an example control that displays instructions in design mode,
    // with which the example UITypeEditor is associated.
    public class WinFormsEdServiceDropDownExampleControl : UserControl
    {
        [EditorAttribute(typeof(TestDropDownEditor), typeof(UITypeEditor))]
        public string TestDropDownString
        {
            get
            {
                return localDropDownTestString;
            }
            set
            {       
                localDropDownTestString = value;
            }
        }
        
        private string localDropDownTestString;

        public WinFormsEdServiceDropDownExampleControl()
        {
            localDropDownTestString = "Test String";
            this.Size = new Size(210, 74);
            this.BackColor = Color.Beige;
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            if( this.DesignMode )
            {
                e.Graphics.DrawString("Use the Properties window to show", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 5);
                e.Graphics.DrawString("a drop-down control, using the", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 17);
                e.Graphics.DrawString("IWindowsFormsEditorService, for", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 29);
                e.Graphics.DrawString("configuring this control's", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 41);
                e.Graphics.DrawString("TestDropDownString property.", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 53);
            }
            else
            {
                e.Graphics.DrawString("This example requires design mode.", new Font("Arial", 8), new SolidBrush(Color.Black), 5, 5);
            }
        }
    }
}

#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::Windows::Forms::Design;
using namespace System::Security::Permissions;

namespace IWindowsFormsEditorServiceExample
{
   // Example control for entering a string.
   private ref class StringInputControl: public UserControl
   {
   public:
      System::Windows::Forms::TextBox^ inputTextBox;

   private:
      System::Windows::Forms::Button^ ok_button;
      System::Windows::Forms::Button^ cancel_button;
      IWindowsFormsEditorService^ edSvc;

   public:
      StringInputControl( String^ text, IWindowsFormsEditorService^ edSvc )
      {
         InitializeComponent();
         inputTextBox->Text = text;
         
         // Stores IWindowsFormsEditorService reference to use to
         // close the control.
         this->edSvc = edSvc;
      }

   private:
      void InitializeComponent()
      {
         this->inputTextBox = gcnew System::Windows::Forms::TextBox;
         this->ok_button = gcnew System::Windows::Forms::Button;
         this->cancel_button = gcnew System::Windows::Forms::Button;
         this->SuspendLayout();
         this->inputTextBox->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
         this->inputTextBox->Location = System::Drawing::Point( 6, 7 );
         this->inputTextBox->Name = "inputTextBox";
         this->inputTextBox->Size = System::Drawing::Size( 336, 20 );
         this->inputTextBox->TabIndex = 0;
         this->inputTextBox->Text = "";
         this->ok_button->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
         this->ok_button->DialogResult = System::Windows::Forms::DialogResult::OK;
         this->ok_button->Location = System::Drawing::Point( 186, 38 );
         this->ok_button->Name = "ok_button";
         this->ok_button->TabIndex = 1;
         this->ok_button->Text = "OK";
         this->ok_button->Click += gcnew EventHandler( this, &StringInputControl::CloseControl );
         this->cancel_button->Anchor = static_cast<AnchorStyles>(System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right);
         this->cancel_button->DialogResult = System::Windows::Forms::DialogResult::Cancel;
         this->cancel_button->Location = System::Drawing::Point( 267, 38 );
         this->cancel_button->Name = "cancel_button";
         this->cancel_button->TabIndex = 2;
         this->cancel_button->Text = "Cancel";
         this->cancel_button->Click += gcnew EventHandler( this, &StringInputControl::CloseControl );
         array<System::Windows::Forms::Control^>^temp0 = {this->cancel_button,this->ok_button,this->inputTextBox};
         this->Controls->AddRange( temp0 );
         this->Name = "StringInputControl";
         this->Size = System::Drawing::Size( 350, 70 );
         this->ResumeLayout( false );
      }

      void CloseControl( Object^ /*sender*/, EventArgs^ /*e*/ )
      {
         edSvc->CloseDropDown();
      }
   };

   // Example UITypeEditor that uses the IWindowsFormsEditorService to
   // display a drop-down control.
   [PermissionSet(SecurityAction::Demand, Name = "FullTrust")]
   public ref class TestDropDownEditor: public System::Drawing::Design::UITypeEditor
   {
   public:
      TestDropDownEditor(){}

      virtual System::Drawing::Design::UITypeEditorEditStyle GetEditStyle( System::ComponentModel::ITypeDescriptorContext^ /*context*/ ) override
      {
         // Indicates that this editor can display a control-based
         // drop-down interface.
         return UITypeEditorEditStyle::DropDown;
      }

      virtual Object^ EditValue( System::ComponentModel::ITypeDescriptorContext^ /*context*/, System::IServiceProvider^ provider, Object^ value ) override
      {
         // Attempts to obtain an IWindowsFormsEditorService.
         IWindowsFormsEditorService^ edSvc = dynamic_cast<IWindowsFormsEditorService^>(provider->GetService( IWindowsFormsEditorService::typeid ));
         if ( edSvc == nullptr )
                  return value;

         // Displays a drop-down control.
         StringInputControl^ inputControl = gcnew StringInputControl( dynamic_cast<String^>(value),edSvc );
         edSvc->DropDownControl( inputControl );
         return inputControl->inputTextBox->Text;
      }
   };

   // Provides an example control that displays instructions in design mode,
   // with which the example UITypeEditor is associated.
   public ref class WinFormsEdServiceDropDownExampleControl: public UserControl
   {
   public:

      property String^ TestDropDownString 
      {
         [EditorAttribute(IWindowsFormsEditorServiceExample::TestDropDownEditor::typeid,UITypeEditor::typeid)]
         String^ get()
         {
            return localDropDownTestString;
         }

         void set( String^ value )
         {
            localDropDownTestString = value;
         }
      }

   private:
      String^ localDropDownTestString;

   public:
      WinFormsEdServiceDropDownExampleControl()
      {
         localDropDownTestString = "Test String";
         this->Size = System::Drawing::Size( 210, 74 );
         this->BackColor = Color::Beige;
      }

   protected:
      virtual void OnPaint( System::Windows::Forms::PaintEventArgs^ e ) override
      {
         if ( this->DesignMode )
         {
            e->Graphics->DrawString( "Use the Properties window to show", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 5 );
            e->Graphics->DrawString( "a drop-down control, using the", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 17 );
            e->Graphics->DrawString( "IWindowsFormsEditorService, for", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 29 );
            e->Graphics->DrawString( "configuring this control's", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 41 );
            e->Graphics->DrawString( "TestDropDownString property.", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 53 );
         }
         else
         {
            e->Graphics->DrawString( "This example requires design mode.", gcnew System::Drawing::Font( "Arial",8 ), gcnew SolidBrush( Color::Black ), 5, 5 );
         }
      }
   };
}

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

IWindowsFormsEditorService 成员
System.Windows.Forms.Design 命名空间