ControlDesigner.InvokeTransactedChange 方法

參考

定義

命名空間:: System.Web.UI.Design

組件:: System.Design.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

使用已指定可以設計主應用程式的復原功能復原為單位的參數，將一系列變更包裝在交易之中。

多載

InvokeTransactedChange(IComponent, TransactedChangeCallback, Object, String)	使用已指定可以設計主應用程式的復原功能復原為單位的參數，將一系列變更包裝在交易之中。
InvokeTransactedChange(IComponent, TransactedChangeCallback, Object, String, MemberDescriptor)	使用已指定可以設計主應用程式的復原功能復原為單位的參數，將一系列變更包裝在交易之中。
InvokeTransactedChange(IServiceProvider, IComponent, TransactedChangeCallback, Object, String, MemberDescriptor)	使用已指定可以設計主應用程式的復原功能復原為單位的參數，將一系列變更包裝在交易之中。

InvokeTransactedChange(IComponent, TransactedChangeCallback, Object, String)

使用已指定可以設計主應用程式的復原功能復原為單位的參數，將一系列變更包裝在交易之中。

public:
 static void InvokeTransactedChange(System::ComponentModel::IComponent ^ component, System::Web::UI::Design::TransactedChangeCallback ^ callback, System::Object ^ context, System::String ^ description);

public static void InvokeTransactedChange (System.ComponentModel.IComponent component, System.Web.UI.Design.TransactedChangeCallback callback, object context, string description);

static member InvokeTransactedChange : System.ComponentModel.IComponent * System.Web.UI.Design.TransactedChangeCallback * obj * string -> unit

Public Shared Sub InvokeTransactedChange (component As IComponent, callback As TransactedChangeCallback, context As Object, description As String)

參數

component: IComponent

與控制項設計工具相關聯的控制項。

callback: TransactedChangeCallback

TransactedChangeCallback 物件，表示要在控制項設計工具中，當做交易之一部分而進行呼叫的函式。

context: Object

包含回呼引數的物件。

description: String

允許交易完成的效果描述，它是由設計主機用來給使用者機會，以取消交易。

例外狀況

ArgumentNullException

component 為 null。

-或-

callback 為 null。

範例

下列程式碼範例示範如何使用和 TextBox 控制項建立簡單的複合控制項 Label ，以及設定標籤文字的屬性，以及 Text 控制項的 TextBox 、 Width 和 BackColor 屬性。相關聯的控制項設計工具類別會建立三 DesignerActionMethodItem 個命令，每個命令都會在控制項上設定兩個屬性。使用 InvokeTransactedChange 方法，您可以使用設計主機的復原功能，例如 Visual Studio 2005，將每個已完成的交易復原為一個單位。

using System;
using System.Web;
using System.Web.UI;
using System.Drawing;
using System.Collections;
using System.Web.UI.WebControls;
using System.Web.UI.Design;
using System.ComponentModel;
using System.ComponentModel.Design;

namespace ASPNet.Samples
{
    // Create a custom control class with a Label and TextBox
    [System.Security.Permissions.PermissionSetAttribute(
        System.Security.Permissions.SecurityAction.InheritanceDemand,
        Name = "FullTrust")]
    [System.Security.Permissions.PermissionSetAttribute(
        System.Security.Permissions.SecurityAction.Demand,
        Name = "FullTrust")]
    [DesignerAttribute(typeof(SampleControlDesigner))]
    public class SampleControl : CompositeControl
    {
        int defaultWidth = 150;

        public SampleControl()
        {
        }

        // Create a set of public properties
        [Browsable(true), Bindable(true), DefaultValue(""),
            PersistenceMode(PersistenceMode.Attribute)]
        public string LabelText
        {
            get
            {
                EnsureChildControls();
                return MyLabel.Text;
            }
            set
            {
                EnsureChildControls();
                MyLabel.Text = value;
            }
        }

        [Browsable(true), Bindable(true), DefaultValue(""),
            PersistenceMode(PersistenceMode.Attribute)]
        public string BoxText
        {
            get
            { 
                EnsureChildControls();
                return MyTextBox.Text;
            }
            set
            {
                EnsureChildControls();
                MyTextBox.Text = value;
            }
        }

        [Browsable(true), Bindable(true), Category("Appearance"),
            PersistenceMode(PersistenceMode.Attribute)]
        public Unit BoxWidth
        {
            get
            {
                EnsureChildControls();
                return MyTextBox.Width;
            }
            set
            {
                EnsureChildControls();
                MyTextBox.Width = value;
            }
        }

        [Browsable(true), Bindable(true), Category("Appearance"),
            PersistenceMode(PersistenceMode.Attribute)]
        public override Color BackColor
        {
            get
            {
                EnsureChildControls();
                return MyTextBox.BackColor;
           }
            set
            {
                EnsureChildControls();
                MyTextBox.BackColor = value;
            }
        }

        // Create private properties
        private TextBox MyTextBox
        {
            get
            {
                EnsureChildControls();
                return (TextBox)FindControl("MyTextBox");
            }
        }
        private Label MyLabel
        {
            get
            {
                EnsureChildControls();
                return (Label)FindControl("MyLabel");
            }
        }

        // Create a label and a text box.
        protected override void CreateChildControls()
        {
            // Clear the controls
            Controls.Clear();

            // Create a Label control
            Label localLabel = new Label();
            localLabel.EnableViewState = false;
            localLabel.ID = "MyLabel";
            localLabel.Text = localLabel.ID + ": ";
            Controls.Add(localLabel);

            // Create a TextBox control
            TextBox localTextBox = new TextBox();
            localTextBox.ID = "MyTextBox";
            localTextBox.Width = defaultWidth;
            Controls.Add(localTextBox);
        }
    }

    // Create a designer class for the SampleControl
    [System.Security.Permissions.SecurityPermission(
        System.Security.Permissions.SecurityAction.Demand, 
        Flags = System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)]
    public class SampleControlDesigner : ControlDesigner
    {
        // Constructor
        public SampleControlDesigner() : base()
        {
        }

        // Do not allow resizing; force use of properties to set width
        public override bool AllowResize
        {
            get { return false; }
        }

        // Create a custom ActionLists collection
        public override DesignerActionListCollection ActionLists
        {
            get
            {
                // Create the collection
                DesignerActionListCollection actionLists = new DesignerActionListCollection();

                // Get the base items, if any
                actionLists.AddRange(base.ActionLists);

                // Add a custom list of actions
                actionLists.Add(new CustomControlActionList(this));

                return actionLists;
            }
        }

        // Create an embedded DesignerActionList class
        private class CustomControlActionList : DesignerActionList
        {
            // Create private fields
            private SampleControlDesigner _parent;
            private DesignerActionItemCollection items;

            // Constructor
            public CustomControlActionList(SampleControlDesigner parent)
                : base(parent.Component)
            {
                _parent = parent;
            }

            // Create a set of transacted callback methods
            // Callback for the wide format
            public void FormatWide()
            {
                SampleControl ctrl = (SampleControl)_parent.Component;
                
                // Create the callback
                TransactedChangeCallback toCall = new TransactedChangeCallback(DoFormat);
                // Create the transacted change in the control
                ControlDesigner.InvokeTransactedChange(ctrl, toCall, "FormatWide", "Use a wide format");
            }

            // Callback for the medium format
            public void FormatMedium()
            {
                SampleControl ctrl = (SampleControl)_parent.Component;
                
                // Create the callback
                TransactedChangeCallback toCall = new TransactedChangeCallback(DoFormat);
                // Create the transacted change in the control
                ControlDesigner.InvokeTransactedChange(ctrl, toCall, "FormatMedium", "Use a medium format");
            }

            // Callback for the narrow format
            public void FormatNarrow()
            {
                SampleControl ctrl = (SampleControl)_parent.Component;
                
                // Create the callback
                TransactedChangeCallback toCall = new TransactedChangeCallback(DoFormat);
                // Create the transacted change in the control
                ControlDesigner.InvokeTransactedChange(ctrl, toCall, "FormatNarrow", "Use a narrow format");
            }

            // Get the sorted list of Action items
            public override DesignerActionItemCollection GetSortedActionItems()
            {
                if (items == null)
                {
                    // Create the collection
                    items = new DesignerActionItemCollection();

                    // Add a header to the list
                    items.Add(new DesignerActionHeaderItem("Select a Style:"));

                    // Add three commands
                    items.Add(new DesignerActionMethodItem(this, "FormatWide", "Format Wide", true));
                    items.Add(new DesignerActionMethodItem(this, "FormatMedium", "Format Medium", true));
                    items.Add(new DesignerActionMethodItem(this, "FormatNarrow", "Format Narrow", true));
                }
                return items;
            }

            // Function for the callbacks to call
            public bool DoFormat(object arg)
            {
                // Get a reference to the designer's associated component
                SampleControl ctl = (SampleControl)_parent.Component;

                // Get the format name from the arg
                string fmt = (string)arg;

                // Create property descriptors
                PropertyDescriptor widthProp = TypeDescriptor.GetProperties(ctl)["BoxWidth"];
                PropertyDescriptor backColorProp = TypeDescriptor.GetProperties(ctl)["BackColor"];

                // For the selected format, set two properties
                switch (fmt)
                {
                    case "FormatWide":
                        widthProp.SetValue(ctl, Unit.Pixel(250));
                        backColorProp.SetValue(ctl, Color.LightBlue);
                        break;
                    case "FormatNarrow":
                        widthProp.SetValue(ctl, Unit.Pixel(100));
                        backColorProp.SetValue(ctl, Color.LightCoral);
                        break;
                    case "FormatMedium":
                        widthProp.SetValue(ctl, Unit.Pixel(150));
                        backColorProp.SetValue(ctl, Color.White);
                        break;
                }
                _parent.UpdateDesignTimeHtml();

                // Return an indication of success
                return true;
            }
        }
    }
}

Imports System.Web
Imports System.Web.UI
Imports System.Drawing
Imports System.Collections
Imports System.Web.UI.WebControls
Imports System.Web.UI.Design
Imports System.ComponentModel
Imports System.ComponentModel.Design

Namespace ASPNet.Samples

    ' Create a custom control class with a Label and TextBox
    <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.InheritanceDemand, Name:="FullTrust")> _
    <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
    <Designer("ASPNet.Samples.SampleControlDesigner")> _
    Public Class SampleControl
        Inherits CompositeControl

        Dim defaultWidth As Integer = 150

        Public Sub New()

        End Sub

        ' Create a set of Public properties
        <Bindable(True), DefaultValue(""), _
            PersistenceMode(PersistenceMode.Attribute)> _
        Public Property LabelText() As String
            Get
                EnsureChildControls()
                Return MyLabel.Text
            End Get
            Set(ByVal value As String)
                EnsureChildControls()
                MyLabel.Text = value
            End Set
        End Property

        <Bindable(True), DefaultValue(""), _
            PersistenceMode(PersistenceMode.Attribute)> _
        Public Property BoxText() As String
            Get
                EnsureChildControls()
                Return MyTextBox.Text
            End Get
            Set(ByVal value As String)
                EnsureChildControls()
                MyTextBox.Text = value
            End Set
        End Property

        <Bindable(True), Category("Appearance"), _
            PersistenceMode(PersistenceMode.Attribute)> _
        Public Property BoxWidth() As Unit
            Get
                EnsureChildControls()
                Return MyTextBox.Width
            End Get
            Set(ByVal value As Unit)
                EnsureChildControls()
                MyTextBox.Width = value
            End Set
        End Property

        <Bindable(True), Category("Appearance"), _
            PersistenceMode(PersistenceMode.Attribute)> _
        Public Overrides Property BackColor() As Color
            Get
                EnsureChildControls()
                Return MyTextBox.BackColor()
            End Get
            Set(ByVal value As Color)
                EnsureChildControls()
                MyTextBox.BackColor = value
            End Set
        End Property

        ' Create private properties
        Private ReadOnly Property MyTextBox() As TextBox
            Get
                EnsureChildControls()
                Return CType(FindControl("MyTextBox"), TextBox)
            End Get
        End Property
        Private ReadOnly Property MyLabel() As Label
            Get
                EnsureChildControls()
                Return CType(FindControl("MyLabel"), Label)
            End Get
        End Property

        ' Create a Label and a TextBox
        Protected Overrides Sub CreateChildControls()
            Controls.Clear()
            MyBase.CreateChildControls()

            ' Create a Label control
            Dim localLabel As New Label()
            localLabel.ID = "MyLabel"
            localLabel.Text = localLabel.ID + ": "
            localLabel.EnableViewState = False
            Controls.Add(localLabel)

            ' Create a TextBox control
            Dim localTextBox As New TextBox()
            localTextBox.ID = "MyTextBox"
            localTextBox.Width = defaultWidth
            localTextBox.EnableViewState = False
            Controls.Add(localTextBox)
        End Sub
    End Class

    '-----------------------------------------------
    ' Create a designer class for the SampleControl
    <System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, Flags:=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)> _
    Public Class SampleControlDesigner
        Inherits ControlDesigner

        Private sampControl As SampleControl

        ' Constructor
        Public Sub New()
            MyBase.New()
        End Sub

        ' Do not allow resizing; force use of properties to set width
        Public Overrides ReadOnly Property AllowResize() As Boolean
            Get
                Return False
            End Get
        End Property

        ' Create a custom ActionLists collection
        Public Overrides ReadOnly Property ActionLists() As DesignerActionListCollection
            Get
                ' Create the collection
                Dim lists As New DesignerActionListCollection()

                ' Get the base items, if any
                lists.AddRange(MyBase.ActionLists)

                ' Add my own list of actions
                lists.Add(New CustomControlActionList(Me))

                Return lists
            End Get
        End Property

        ' Create an embedded DesignerActionList class
        Private Class CustomControlActionList
            Inherits DesignerActionList

            ' Create private fields
            Private _parent As SampleControlDesigner
            Private _items As DesignerActionItemCollection

            ' Constructor
            Public Sub New(ByVal parent As SampleControlDesigner)
                MyBase.New(parent.Component)
                _parent = parent
            End Sub

            ' Create a set of transacted callback methods
            ' Callback for a wide format
            Public Sub FormatWide()
                Dim ctrl As SampleControl = CType(_parent.Component, SampleControl)

                ' Create the callback
                Dim toCall As New TransactedChangeCallback(AddressOf DoFormat)
                ' Create the transacted change in the control
                ControlDesigner.InvokeTransactedChange(ctrl, toCall, "FormatWide", "Use a wide format")
            End Sub

            ' Callback for the medium format
            Public Sub FormatMedium()
                Dim ctrl As SampleControl = CType(_parent.Component, SampleControl)

                ' Create the callback
                Dim toCall As New TransactedChangeCallback(AddressOf DoFormat)
                ' Create the transacted change in the control
                ControlDesigner.InvokeTransactedChange(ctrl, toCall, "FormatMedium", "Use a medium format")
            End Sub

            ' Callback for the narrow format
            Public Sub FormatNarrow()
                Dim ctrl As SampleControl = CType(_parent.Component, SampleControl)

                ' Create the callback
                Dim toCall As New TransactedChangeCallback(AddressOf DoFormat)
                ' Create the transacted change in the control
                ControlDesigner.InvokeTransactedChange(ctrl, toCall, "FormatNarrow", "Use a narrow format")
            End Sub

            ' Get the sorted list of Action items
            Public Overrides Function GetSortedActionItems() As DesignerActionItemCollection
                If IsNothing(_items) Then
                    ' Create the collection
                    _items = New DesignerActionItemCollection()

                    ' Add a header to the list
                    _items.Add(New DesignerActionHeaderItem("Select a Style:"))

                    ' Add three commands
                    _items.Add(New DesignerActionMethodItem(Me, "FormatWide", "Format Wide", True))
                    _items.Add(New DesignerActionMethodItem(Me, "FormatMedium", "Format Medium", True))
                    _items.Add(New DesignerActionMethodItem(Me, "FormatNarrow", "Format Narrow", True))
                End If

                Return _items
            End Function

            ' Function for the callback to call
            Public Function DoFormat(ByVal arg As Object) As Boolean
                ' Get a reference to the designer's associated component
                Dim ctl As SampleControl = CType(_parent.ViewControl(), SampleControl)

                ' Get the format name from the arg
                Dim fmt As String = CType(arg, String)

                ' Create property descriptors
                Dim widthProp As PropertyDescriptor = TypeDescriptor.GetProperties(ctl)("BoxWidth")
                Dim backColorProp As PropertyDescriptor = TypeDescriptor.GetProperties(ctl)("BackColor")

                ' For the selected format, set two properties
                Select Case fmt
                    Case "FormatWide"
                        widthProp.SetValue(ctl, Unit.Pixel(250))
                        backColorProp.SetValue(ctl, Color.LightBlue)
                    Case "FormatNarrow"
                        widthProp.SetValue(ctl, Unit.Pixel(100))
                        backColorProp.SetValue(ctl, Color.LightCoral)
                    Case "FormatMedium"
                        widthProp.SetValue(ctl, Unit.Pixel(150))
                        backColorProp.SetValue(ctl, Color.White)
                End Select

                ' Return an indication of success
                Return True

            End Function
        End Class
    End Class

End Namespace

備註

方法的 InvokeTransactedChange 實作會通知設計主機，其是由 Site 的屬性 component 決定，該變更是在相關聯的控制項中發生，而且如果設計主機未取消變更，則使用指定的 callbackcontext 叫用指定的，然後通知設計主機變更已完成。

如果設計主控制項或相關聯的控制項擲回例外狀況的 CheckoutException 靜態 Canceled 例外狀況欄位，則會取消交易而不叫用 callback 。

另請參閱

適用於

InvokeTransactedChange(IComponent, TransactedChangeCallback, Object, String, MemberDescriptor)

使用已指定可以設計主應用程式的復原功能復原為單位的參數，將一系列變更包裝在交易之中。

public:
 static void InvokeTransactedChange(System::ComponentModel::IComponent ^ component, System::Web::UI::Design::TransactedChangeCallback ^ callback, System::Object ^ context, System::String ^ description, System::ComponentModel::MemberDescriptor ^ member);

public static void InvokeTransactedChange (System.ComponentModel.IComponent component, System.Web.UI.Design.TransactedChangeCallback callback, object context, string description, System.ComponentModel.MemberDescriptor member);

static member InvokeTransactedChange : System.ComponentModel.IComponent * System.Web.UI.Design.TransactedChangeCallback * obj * string * System.ComponentModel.MemberDescriptor -> unit

Public Shared Sub InvokeTransactedChange (component As IComponent, callback As TransactedChangeCallback, context As Object, description As String, member As MemberDescriptor)

參數

component: IComponent

與控制項設計工具相關聯的控制項。

callback: TransactedChangeCallback

TransactedChangeCallback 物件，表示要在控制項設計工具中，當做交易之一部分而進行呼叫的函式。

context: Object

包含回呼引數的物件。

description: String

允許交易完成的效果描述，它是由設計主機用來給使用者機會，以取消交易。

member: MemberDescriptor

MemberDescriptor 物件 (通常是 EventDescriptor 或 PropertyDescriptor 物件)，描述做為交易的一部分而進行叫用的關聯控制項成員。

例外狀況

ArgumentNullException

component 為 null。

-或-

callback 為 null。

範例

如需程式碼範例，請參閱InvokeTransactedChange(IComponent, TransactedChangeCallback, Object, String)。

備註

方法的 InvokeTransactedChange 實作會通知設計主機，其是由 Site 的屬性 component 決定，該變更發生在相關聯控制項的指定 member (屬性或方法) ，如果設計主機未取消變更， callback 請使用指定的做為引數叫用指定的 context ，然後通知設計主機變更已完成。

如果設計主控制項或相關聯的控制項擲回例外狀況的 CheckoutException 靜態 Canceled 例外狀況欄位，則會取消交易而不叫用 callback 。

另請參閱

適用於

InvokeTransactedChange(IServiceProvider, IComponent, TransactedChangeCallback, Object, String, MemberDescriptor)

使用已指定可以設計主應用程式的復原功能復原為單位的參數，將一系列變更包裝在交易之中。

public:
 static void InvokeTransactedChange(IServiceProvider ^ serviceProvider, System::ComponentModel::IComponent ^ component, System::Web::UI::Design::TransactedChangeCallback ^ callback, System::Object ^ context, System::String ^ description, System::ComponentModel::MemberDescriptor ^ member);

public static void InvokeTransactedChange (IServiceProvider serviceProvider, System.ComponentModel.IComponent component, System.Web.UI.Design.TransactedChangeCallback callback, object context, string description, System.ComponentModel.MemberDescriptor member);

static member InvokeTransactedChange : IServiceProvider * System.ComponentModel.IComponent * System.Web.UI.Design.TransactedChangeCallback * obj * string * System.ComponentModel.MemberDescriptor -> unit

Public Shared Sub InvokeTransactedChange (serviceProvider As IServiceProvider, component As IComponent, callback As TransactedChangeCallback, context As Object, description As String, member As MemberDescriptor)

參數

serviceProvider: IServiceProvider

IServiceProvider 物件，表示為關聯的控制項提供控制項設計工具服務的設計主應用程式。

component: IComponent

與控制項設計工具相關聯的控制項。

callback: TransactedChangeCallback

TransactedChangeCallback 物件，表示要在控制項設計工具中，當做交易之一部分而進行呼叫的函式。

context: Object

包含回呼引數的物件。

description: String

允許交易完成的效果描述，它是由設計主機用來給使用者機會，以取消交易。

member: MemberDescriptor

MemberDescriptor 物件 (通常是 EventDescriptor 或 PropertyDescriptor 物件)，描述做為交易的一部分而進行叫用的關聯控制項成員。

例外狀況

ArgumentNullException

component 為 null。

-或-

callback 為 null。

-或-

serviceProvider 為 null。

範例

如需程式碼範例，請參閱InvokeTransactedChange。

備註

方法的 InvokeTransactedChange 實作會通知設計主應用程式，該設計主機是由所 serviceProvider 表示，該變更發生在相關聯控制項的指定 member (屬性或方法) ，如果設計主機未取消變更， callback 則會使用指定的做為引數叫用指定的 context ，然後通知設計主機變更已完成。

如果設計主控制項或相關聯的控制項擲回例外狀況的 CheckoutException 靜態 Canceled 例外狀況欄位，則會取消交易而不叫用 callback 。

另請參閱

適用於

ControlDesigner.InvokeTransactedChange 方法

定義

多載

InvokeTransactedChange(IComponent, TransactedChangeCallback, Object, String)

參數

例外狀況

範例

備註

另請參閱

適用於

InvokeTransactedChange(IComponent, TransactedChangeCallback, Object, String, MemberDescriptor)

參數

例外狀況

範例

備註

另請參閱

適用於

InvokeTransactedChange(IServiceProvider, IComponent, TransactedChangeCallback, Object, String, MemberDescriptor)

參數

例外狀況

範例

備註

另請參閱

適用於

意見反應

其他資源