EditorPart 类

定义

public ref class EditorPart abstract : System::Web::UI::WebControls::WebParts::Part

[System.ComponentModel.Bindable(false)]
public abstract class EditorPart : System.Web.UI.WebControls.WebParts.Part

[<System.ComponentModel.Bindable(false)>]
type EditorPart = class
    inherit Part

Public MustInherit Class EditorPart
Inherits Part

继承

Object

Control

WebControl

Panel

Part

EditorPart

派生

System.Web.UI.WebControls.WebParts.AppearanceEditorPart

System.Web.UI.WebControls.WebParts.BehaviorEditorPart

System.Web.UI.WebControls.WebParts.LayoutEditorPart

System.Web.UI.WebControls.WebParts.PropertyGridEditorPart

属性

BindableAttribute

示例

下面的代码示例演示了控件的 EditorPart 声明性和编程性使用。 此代码示例包含四个部分：

• 一个用户控件，可用于更改 Web 部件页上的显示模式。

• 一 EditorZone 个包含控件的 EditorPart 网页，其中包含区域中声明的 Web 部件控件集中的多个控件，以及一个对自定义 WebPart 控件的引用。

• 包含自定义WebPart控件的类，以及用于编辑控件中的属性的WebPart自定义EditorPart控件。

• 说明在浏览器中加载页面时示例的工作原理。

此代码示例的第一部分是用户控件，使用户能够更改网页上的显示模式。 有关显示模式的详细信息和此控件中的源代码说明，请参阅 演练：更改 Web 部件页上的显示模式。

<%@ control language="C#" classname="DisplayModeMenuCS"%>

<script runat="server">
  
 // Use a field to reference the current WebPartManager.
  WebPartManager _manager;

  void Page_Init(object sender, EventArgs e)
  {
    Page.InitComplete += new EventHandler(InitComplete);
  }  

  void InitComplete(object sender, System.EventArgs e)
  {
    _manager = WebPartManager.GetCurrentWebPartManager(Page);

    String browseModeName = WebPartManager.BrowseDisplayMode.Name;

    // Fill the dropdown with the names of supported display modes.
    foreach (WebPartDisplayMode mode in _manager.SupportedDisplayModes)
    {
      String modeName = mode.Name;
      // Make sure a mode is enabled before adding it.
      if (mode.IsEnabled(_manager))
      {
        ListItem item = new ListItem(modeName + " Mode", modeName);
        DisplayModeDropdown.Items.Add(item);
      }
    }

  }
 
  // Change the page to the selected display mode.
  void DisplayModeDropdown_SelectedIndexChanged(object sender, 
    EventArgs e)
  {
    String selectedMode = DisplayModeDropdown.SelectedValue;

    WebPartDisplayMode mode = _manager.SupportedDisplayModes[selectedMode];
    if (mode != null)
      _manager.DisplayMode = mode;

  }

  void Page_PreRender(object sender, EventArgs e)
  {
    DisplayModeDropdown.SelectedValue = _manager.DisplayMode.Name;
  }
  
</script>
<div>
  <asp:DropDownList ID="DisplayModeDropdown" 
    runat="server"  
    AutoPostBack="true" 
    OnSelectedIndexChanged="DisplayModeDropdown_SelectedIndexChanged" />
</div>

<%@ control language="vb" classname="DisplayModeMenuVB"%>

<script runat="server">
  
' Use a field to reference the current WebPartManager.
Dim _manager As WebPartManager


Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs) 
    AddHandler Page.InitComplete, AddressOf InitComplete

End Sub 


Sub InitComplete(ByVal sender As Object, ByVal e As System.EventArgs) 
    _manager = WebPartManager.GetCurrentWebPartManager(Page)
    
    Dim browseModeName As String = WebPartManager.BrowseDisplayMode.Name
    
    ' Fill the dropdown with the names of supported display modes.
    Dim mode As WebPartDisplayMode
    For Each mode In  _manager.SupportedDisplayModes
        Dim modeName As String = mode.Name
        ' Make sure a mode is enabled before adding it.
        If mode.IsEnabled(_manager) Then
            Dim item As New ListItem(modeName + " Mode", modeName)
            DisplayModeDropdown.Items.Add(item)
        End If
    Next mode

End Sub 
 

' Change the page to the selected display mode.
Sub DisplayModeDropdown_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) 
    Dim selectedMode As String = DisplayModeDropdown.SelectedValue
    
    Dim mode As WebPartDisplayMode = _manager.SupportedDisplayModes(selectedMode)
    If Not (mode Is Nothing) Then
        _manager.DisplayMode = mode
    End If
 
End Sub 


Sub Page_PreRender(ByVal sender As Object, ByVal e As EventArgs) 
    DisplayModeDropdown.SelectedValue = _manager.DisplayMode.Name

End Sub 

</script>
<div>
  <asp:DropDownList ID="DisplayModeDropdown" 
    runat="server"  
    AutoPostBack="true" 
    OnSelectedIndexChanged="DisplayModeDropdown_SelectedIndexChanged" />
</div>

代码示例的第二部分是网页。 它包含对控件的声明性引用，子<zonetemplate>元素包含对两个 EditorZone Web 部件控件集EditorPart控件的声明性引用。 该页还引用自定义 WebPart 控件，使用 Register 程序集的 指令和 <aspSample:TextDisplayWebPart> 控件的 元素。

<%@ page language="c#" %>
<%@ register TagPrefix="uc1" 
  TagName="DisplayModeMenu" 
  Src="DisplayModecs.ascx" %>
<%@ register tagprefix="aspSample" 
  Namespace="Samples.AspNet.CS.Controls" 
  Assembly="TextDisplayWebPartCS" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>
      Text Display WebPart with EditorPart
    </title>
  </head>
  <body>
    <form id="form1" runat="server">
      <asp:webpartmanager id="WebPartManager1" runat="server" />
      <uc1:DisplayModeMenu ID="DisplayModeMenu1" runat="server" />
      <asp:webpartzone id="zone1" runat="server" 
        CloseVerb-Enabled="false">
        <zonetemplate>
          <aspSample:TextDisplayWebPart 
            runat="server"   
            id="textwebpart" 
            title = "Text Content WebPart" />          
        </zonetemplate>
      </asp:webpartzone> 
      <asp:EditorZone ID="EditorZone1" runat="server">
        <ZoneTemplate>
          <asp:AppearanceEditorPart ID="AppearanceEditorPart1" 
            runat="server" />
          <asp:LayoutEditorPart ID="LayoutEditorPart1" 
            runat="server" />
        </ZoneTemplate>      
      </asp:EditorZone>
    </form>
  </body>
</html>

<%@ page language="vb" %>
<%@ register TagPrefix="uc1" 
  TagName="DisplayModeMenu" 
  Src="DisplayModevb.ascx" %>
<%@ register tagprefix="aspSample" 
  Namespace="Samples.AspNet.VB.Controls" 
  Assembly="TextDisplayWebPartVB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>
      Text Display WebPart with EditorPart
    </title>
  </head>
  <body>
    <form id="form1" runat="server">
      <asp:webpartmanager id="WebPartManager1" runat="server" />
      <uc1:DisplayModeMenu ID="DisplayModeMenu1" runat="server" />
      <asp:webpartzone id="zone1" runat="server" 
        CloseVerb-Enabled="false">
        <zonetemplate>
          <aspSample:TextDisplayWebPart 
            runat="server"   
            id="textwebpart" 
            title = "Text Content WebPart" />          
        </zonetemplate>
      </asp:webpartzone> 
      <asp:EditorZone ID="EditorZone1" runat="server">
        <ZoneTemplate>
          <asp:AppearanceEditorPart ID="AppearanceEditorPart1" 
            runat="server" />
          <asp:LayoutEditorPart ID="LayoutEditorPart1" 
            runat="server" />
        </ZoneTemplate>      
      </asp:EditorZone>
    </form>
  </body>
</html>

代码示例的第三部分是名为 的TextDisplayWebPart自定义WebPart类。 类实现 IWebEditable 接口。 在此类中是一个嵌套的私有类，该类包含与 TextDisplayWebPart 类关联的专用EditorPart类的代码，名为 TextDisplayEditorPart。 在运行时，当TextDisplayWebPart控件进入编辑模式时，它会在其 TextDisplayWebPart.CreateEditorParts 方法中创建 类的TextDisplayEditorPart实例，并将其与其他EditorPart控件一起显示在 控件中EditorZone。

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission(SecurityAction.InheritanceDemand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  public class TextDisplayWebPart : WebPart
  {
    private String _contentText = null;
    private String _fontStyle = null;
    TextBox input;
    Label DisplayContent;
    Literal lineBreak;

    public override EditorPartCollection CreateEditorParts()
    {
      ArrayList editorArray = new ArrayList();
      TextDisplayEditorPart edPart = new TextDisplayEditorPart();
      edPart.ID = this.ID + "_editorPart1";
      editorArray.Add(edPart);
      EditorPartCollection editorParts = 
        new EditorPartCollection(editorArray);
      return editorParts;
    }

    public override object WebBrowsableObject
    {
      get { return this; }
    }

    [Personalizable(), WebBrowsable]
    public String ContentText
    {
      get { return _contentText; }
      set { _contentText = value; }
    }

    [Personalizable(), WebBrowsable()]
    public String FontStyle
    {
      get { return _fontStyle; }
      set { _fontStyle = value; }
    }

    protected override void CreateChildControls()
    {
      Controls.Clear();
      DisplayContent = new Label();
      DisplayContent.BackColor = Color.LightBlue;
      DisplayContent.Text = this.ContentText;
      if (FontStyle == null)
        FontStyle = "None";
      SetFontStyle(DisplayContent, FontStyle);
      this.Controls.Add(DisplayContent);

      lineBreak = new Literal();
      lineBreak.Text = @"<br />";
      Controls.Add(lineBreak);

      input = new TextBox();
      this.Controls.Add(input);
      Button update = new Button();
      update.Text = "Set Label Content";
      update.Click += new EventHandler(this.submit_Click);
      this.Controls.Add(update);
    }

    private void submit_Click(object sender, EventArgs e)
    {
      // Update the label string.
      if (!string.IsNullOrEmpty(input.Text))
      {
        _contentText = input.Text + @"<br />";
        input.Text = String.Empty;
        DisplayContent.Text = this.ContentText;
      }
    }

    private void SetFontStyle(Label label, String selectedStyle)
    {
      if (selectedStyle == "Bold")
      {
        label.Font.Bold = true;
        label.Font.Italic = false;
        label.Font.Underline = false;
      }
      else if (selectedStyle == "Italic")
      {
        label.Font.Italic = true;
        label.Font.Bold = false;
        label.Font.Underline = false;
      }
      else if (selectedStyle == "Underline")
      {
        label.Font.Underline = true;
        label.Font.Bold = false;
        label.Font.Italic = false;
      }
      else
      {
        label.Font.Bold = false;
        label.Font.Italic = false;
        label.Font.Underline = false;
      }
    }

    // Create a custom EditorPart to edit the WebPart control.
    [AspNetHostingPermission(SecurityAction.Demand,
      Level = AspNetHostingPermissionLevel.Minimal)]
    private class TextDisplayEditorPart : EditorPart
    {
      DropDownList _partContentFontStyle;

      public TextDisplayEditorPart()
      {
        Title = "Font Face";
      }

      public override bool ApplyChanges()
      {
        TextDisplayWebPart part = 
          (TextDisplayWebPart)WebPartToEdit;
        // Update the custom WebPart control with the font style.
        part.FontStyle = PartContentFontStyle.SelectedValue;

        return true;
      }

      public override void SyncChanges()
      {
        TextDisplayWebPart part = 
          (TextDisplayWebPart)WebPartToEdit;
        String currentStyle = part.FontStyle;

        // Select the current font style in the drop-down control.
        foreach (ListItem item in PartContentFontStyle.Items)
        {
          if (item.Value == currentStyle)
          {
            item.Selected = true;
            break;
          }
        }
      }

      protected override void CreateChildControls()
      {
        Controls.Clear();

        // Add a set of font styles to the dropdown list.
        _partContentFontStyle = new DropDownList();
        _partContentFontStyle.Items.Add("Bold");
        _partContentFontStyle.Items.Add("Italic");
        _partContentFontStyle.Items.Add("Underline");
        _partContentFontStyle.Items.Add("None");

        Controls.Add(_partContentFontStyle);
      }

      protected override void RenderContents(HtmlTextWriter writer)
      {
        writer.Write("<b>Text Content Font Style</b>");
        writer.WriteBreak();
        writer.Write("Select a font style.");
        writer.WriteBreak();
        _partContentFontStyle.RenderControl(writer);
        writer.WriteBreak();
      }

      // Access the drop-down control through a property.
      private DropDownList PartContentFontStyle
      {
        get 
        {
          EnsureChildControls();
          return _partContentFontStyle;
        }
      }
    }
  }
}

Imports System.Collections
Imports System.ComponentModel
Imports System.Drawing
Imports System.Security.Permissions
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts

Namespace Samples.AspNet.VB.Controls
  <AspNetHostingPermission(SecurityAction.Demand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  <AspNetHostingPermission(SecurityAction.InheritanceDemand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  Public Class TextDisplayWebPart
    Inherits WebPart
    Private _contentText As String = Nothing
    Private _fontStyle As String = Nothing
    Private input As TextBox
    Private DisplayContent As Label
    Private lineBreak As Literal

    Public Overrides Function CreateEditorParts() _
                                As EditorPartCollection
      Dim editorArray As New ArrayList()
      Dim edPart as New TextDisplayEditorPart()
      edPart.ID = Me.ID & "_editorPart1"
      editorArray.Add(edPart)
      Dim editorParts As New EditorPartCollection(editorArray)
      Return editorParts

    End Function

    Public Overrides ReadOnly Property WebBrowsableObject() _
                                        As Object
      Get
        Return Me
      End Get
    End Property

    <Personalizable(), WebBrowsable()> _
    Public Property ContentText() As String
      Get
        Return _contentText
      End Get
      Set(ByVal value As String)
        _contentText = Value
      End Set
    End Property

    <Personalizable(), WebBrowsable()> _
    Public Property FontStyle() As String
      Get
        Return _fontStyle
      End Get
      Set(ByVal value As String)
        _fontStyle = Value
      End Set
    End Property

    Protected Overrides Sub CreateChildControls()
      Controls.Clear()
      DisplayContent = New Label()
      DisplayContent.BackColor = Color.LightBlue
      DisplayContent.Text = Me.ContentText
      If FontStyle Is Nothing Then
        FontStyle = "None"
      End If
      SetFontStyle(DisplayContent, FontStyle)
      Me.Controls.Add(DisplayContent)

      lineBreak = New Literal()
      lineBreak.Text = "<br />"
      Controls.Add(lineBreak)

      input = New TextBox()
      Me.Controls.Add(input)
      Dim update As New Button()
      update.Text = "Set Label Content"
      AddHandler update.Click, AddressOf Me.submit_Click
      Me.Controls.Add(update)

    End Sub

    Private Sub submit_Click(ByVal sender As Object, _
                             ByVal e As EventArgs)
      ' Update the label string.
      If input.Text <> String.Empty Then
        _contentText = input.Text + "<br />"
        input.Text = String.Empty
        DisplayContent.Text = Me.ContentText
      End If

    End Sub

    Private Sub SetFontStyle(ByVal label As Label, _
                             ByVal selectedStyle As String)
      If selectedStyle = "Bold" Then
        label.Font.Bold = True
        label.Font.Italic = False
        label.Font.Underline = False
      ElseIf selectedStyle = "Italic" Then
        label.Font.Italic = True
        label.Font.Bold = False
        label.Font.Underline = False
      ElseIf selectedStyle = "Underline" Then
        label.Font.Underline = True
        label.Font.Bold = False
        label.Font.Italic = False
      Else
        label.Font.Bold = False
        label.Font.Italic = False
        label.Font.Underline = False
      End If

    End Sub

    ' Create a custom EditorPart to edit the WebPart control.
    <AspNetHostingPermission(SecurityAction.Demand, _
      Level:=AspNetHostingPermissionLevel.Minimal)> _
    Private Class TextDisplayEditorPart
      Inherits EditorPart
      Private _partContentFontStyle As DropDownList

      Public Sub New()
        Title = "Font Face"
      End Sub

      Public Overrides Function ApplyChanges() As Boolean
        Dim part As TextDisplayWebPart = CType(WebPartToEdit, _
                                               TextDisplayWebPart)
        ' Update the custom WebPart control with the font style.
        part.FontStyle = PartContentFontStyle.SelectedValue

        Return True

      End Function

      Public Overrides Sub SyncChanges()
        Dim part As TextDisplayWebPart = CType(WebPartToEdit, _
                                               TextDisplayWebPart)
        Dim currentStyle As String = part.FontStyle

        ' Select the current font style in the drop-down control.
        Dim item As ListItem
        For Each item In PartContentFontStyle.Items
          If item.Value = currentStyle Then
            item.Selected = True
            Exit For
          End If
        Next item

      End Sub

      Protected Overrides Sub CreateChildControls()
        Controls.Clear()

        ' Add a set of font styles to the dropdown list.
        _partContentFontStyle = New DropDownList()
        _partContentFontStyle.Items.Add("Bold")
        _partContentFontStyle.Items.Add("Italic")
        _partContentFontStyle.Items.Add("Underline")
        _partContentFontStyle.Items.Add("None")

        Controls.Add(_partContentFontStyle)

      End Sub

      Protected Overrides Sub RenderContents(ByVal writer _
                                             As HtmlTextWriter)
        writer.Write("<b>Text Content Font Style</b>")
        writer.WriteBreak()
        writer.Write("Select a font style.")
        writer.WriteBreak()
        _partContentFontStyle.RenderControl(writer)
        writer.WriteBreak()

      End Sub

      ' Access the drop-down control through a property.
      Private ReadOnly Property PartContentFontStyle() As DropDownList
        Get
          EnsureChildControls()
          Return _partContentFontStyle
        End Get
      End Property

    End Class

  End Class

End Namespace

在浏览器中加载页面，然后在 “显示模式” 控件上，选择“ 编辑模式 ”以切换到编辑模式。 单击谓词菜单 (控件标题栏中 TextDisplayWebPart 的向下箭头) ，然后单击 “编辑 ”以编辑控件。 当编辑 UI 可见时，可以看到三 EditorPart 个控件，包括用于编辑属性的 TextDisplayWebPart.FontStyle 自定义控件。 如果在编辑 UI 中进行了一些更改并单击“ 应用 ”按钮，则可以使用下拉列表控件将页面返回到浏览模式，并查看编辑更改的完整效果。

注解

类 EditorPart 提供一组基本属性和方法，这些属性和方法由随 Web 部件控件集一起提供的派生 EditorPart 控件以及自定义 EditorPart 控件使用。 控件 EditorPart 允许用户通过修改其布局、外观、属性、行为或其他特征来编辑关联的 WebPart 控件。

编辑用户界面 (UI) ，由包含EditorPart控件的区域组成EditorZoneBase，在网页进入编辑模式后显示。

页面进入编辑模式后，用户可以通过单击所选控件的谓词菜单上的编辑谓词来选择要 WebPart 编辑的控件。 一次只能编辑一 WebPart 个控件。

多个派生 EditorPart 控件随 Web 部件控件集一起提供，如下表所示。 这些控件提供大多数应用程序所需的所有编辑功能。 在 Web 部件页中使用这些控件的典型方法是在元素中 <zonetemplate> 以页面持久性格式声明它们，其中 <zonetemplate> 是元素的 <asp:editorzone> 子元素。 有关代码示例，请参阅本主题的示例部分。

实施者说明

若要创建自定义 EditorPart 控件，必须重写两个重要方法。 方法 ApplyChanges() 将编辑器控件中所做的更改应用于正在编辑的 WebPart 控件。 方法 SyncChanges() 获取正在编辑的控件的 WebPart 当前值，以便编辑器控件可以编辑它们。 使用这两种关键方法，可以在自定义 EditorPart 控件和它正在编辑的 WebPart 控件之间获取和设置值。

如果派生自 EditorPart 类以创建自定义编辑器控件，则可以通过在控件、用户控件或服务器控件中WebPart实现 IWebEditable 接口，将EditorZoneBase自定义控件添加到区域。 有关更多详细信息和代码示例，请参阅 IWebEditable 类概述。 此外，示例部分中的代码示例演示了如何在自定义WebPart控件中实现IWebEditable。

构造函数

属性

方法

事件

显式接口实现

扩展方法

适用于

另请参阅

• EditorZoneBase
• EditorZone
• IWebEditable
• Web 部件个性化概述
• ASP.NET Web 部件控件