WebPartManager.DisconnectWebParts(WebPartConnection) 方法

參考

定義

命名空間:: System.Web.UI.WebControls.WebParts

組件:: System.Web.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。

對網頁上連接的伺服器控制項，執行中斷連接的程序。

public:
 virtual void DisconnectWebParts(System::Web::UI::WebControls::WebParts::WebPartConnection ^ connection);

public virtual void DisconnectWebParts (System.Web.UI.WebControls.WebParts.WebPartConnection connection);

abstract member DisconnectWebParts : System.Web.UI.WebControls.WebParts.WebPartConnection -> unit
override this.DisconnectWebParts : System.Web.UI.WebControls.WebParts.WebPartConnection -> unit

Public Overridable Sub DisconnectWebParts (connection As WebPartConnection)

參數

connection: WebPartConnection

WebPartConnection，表示伺服器控制項之間的連接。

例外狀況

ArgumentNullException

connection 為 null。

ArgumentException

connection 不包含在 StaticConnections 或 DynamicConnections。

InvalidOperationException

StaticConnections 是唯讀的。

-或-

connection 已從 StaticConnections 中斷連接。

-或-

DynamicConnections 是唯讀的。

-或-

connection 已從 DynamicConnections 中斷連接。

範例

下列程式碼範例會示範如何使用 DisconnectWebParts 方法。使用兩個自定義 WebPart 控件，網頁可讓您按下按鈕來建立控件之間的連線，而另一個按鈕可讓您中斷控件的連線。

程式代碼範例有四個部分：

用於變更顯示模式的使用者控制件。
包含自定義 WebPart 控件的來源檔案。
用來裝載控件的網頁。
說明範例如何在瀏覽器中運作。

程式代碼範例的第一個部分是用來變更顯示模式的使用者控件。您可以從類別概觀的 WebPartManager 範例區段取得使用者控制項的原始碼。如需顯示模式和使用者控件運作方式的詳細資訊，請參閱逐步解說：變更網頁元件頁面上的顯示模式。

第二個部分是一個檔案，其中包含要連接的兩個自定義 WebPart 控件的原始程式碼。若要執行程式碼範例，您必須編譯此原始程式碼。您可以明確地編譯它，並將產生的元件放在網站的 Bin 資料夾或全域程式集緩存中。或者，您也可以將原始程式碼放在月臺的 App_Code資料夾中，在運行時間會動態編譯原始程式碼。這個範例會使用動態編譯，因此 Register 參考網頁中這些元件的指示詞會據以宣告在網頁頂端。如需示範編譯選項的逐步解說，請參閱逐步解說：開發和使用自定義網頁伺服器控件。

namespace Samples.AspNet.CS.Controls
{
  using System;
  using System.Web;
  using System.Web.Security;
  using System.Security.Permissions;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  using System.Web.UI.WebControls.WebParts;

  [AspNetHostingPermission(SecurityAction.Demand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission(SecurityAction.InheritanceDemand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  public interface IZipCode
  {
    string ZipCode { get; set;}
  }

  [AspNetHostingPermission(SecurityAction.Demand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission(SecurityAction.InheritanceDemand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  public class ZipCodeWebPart : WebPart, IZipCode
  {
    string zipCodeText = String.Empty;
    TextBox input;
    Button send;

    public ZipCodeWebPart()
    {
    }

    // Make the implemented property personalizable to save 
    // the Zip Code between browser sessions.
    [Personalizable()]
    public virtual string ZipCode
    {
      get { return zipCodeText; }
      set { zipCodeText = value; }
    }

    // This is the callback method that returns the provider.
    [ConnectionProvider("Zip Code", "ZipCodeProvider")]
    public IZipCode ProvideIZipCode()
    {
      return this;
    }

    protected override void CreateChildControls()
    {
      Controls.Clear();
      input = new TextBox();
      this.Controls.Add(input);
      send = new Button();
      send.Text = "Enter 5-digit Zip Code";
      send.Click += new EventHandler(this.submit_Click);
      this.Controls.Add(send);
    }

    private void submit_Click(object sender, EventArgs e)
    {
      if (!string.IsNullOrEmpty(input.Text))
      {
        zipCodeText = Page.Server.HtmlEncode(input.Text);
        input.Text = String.Empty;
      }
    }
  }

  [AspNetHostingPermission(SecurityAction.Demand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission(SecurityAction.InheritanceDemand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  public class WeatherWebPart : WebPart
  {
    private IZipCode _provider;
    string _zipSearch;
    Label DisplayContent;

    // This method is identified by the ConnectionConsumer 
    // attribute, and is the mechanism for connecting with 
    // the provider. 
    [ConnectionConsumer("Zip Code", "ZipCodeConsumer")]
    public void GetIZipCode(IZipCode Provider)
    {
      _provider = Provider;
    }
    
    protected override void OnPreRender(EventArgs e)
    {
      EnsureChildControls();

      if (this._provider != null)
      {
        _zipSearch = _provider.ZipCode.Trim();
        DisplayContent.Text = "My Zip Code is:  " + _zipSearch;
      }
    }

    protected override void CreateChildControls()
    {
      Controls.Clear();
      DisplayContent = new Label();
      this.Controls.Add(DisplayContent);
    }
  }
}

Imports System.Web
Imports System.Web.Security
Imports System.Security.Permissions
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 Interface IZipCode

    Property ZipCode() As String

  End Interface

  <AspNetHostingPermission(SecurityAction.Demand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  <AspNetHostingPermission(SecurityAction.InheritanceDemand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  Public Class ZipCodeWebPart
    Inherits WebPart
    Implements IZipCode
    Private zipCodeText As String = String.Empty
    Private input As TextBox
    Private send As Button

    Public Sub New()
    End Sub

    ' Make the implemented property personalizable to save 
    ' the Zip Code between browser sessions.
    <Personalizable()> _
    Public Property ZipCode() As String _
      Implements IZipCode.ZipCode

      Get
        Return zipCodeText
      End Get
      Set(ByVal value As String)
        zipCodeText = value
      End Set
    End Property

    ' This is the callback method that returns the provider.
    <ConnectionProvider("Zip Code", "ZipCodeProvider")> _
    Public Function ProvideIZipCode() As IZipCode
      Return Me
    End Function


    Protected Overrides Sub CreateChildControls()
      Controls.Clear()
      input = New TextBox()
      Me.Controls.Add(input)
      send = New Button()
      send.Text = "Enter 5-digit Zip Code"
      AddHandler send.Click, AddressOf Me.submit_Click
      Me.Controls.Add(send)

    End Sub


    Private Sub submit_Click(ByVal sender As Object, _
      ByVal e As EventArgs)

      If input.Text <> String.Empty Then
        zipCodeText = Page.Server.HtmlEncode(input.Text)
        input.Text = String.Empty
      End If

    End Sub

  End Class

  <AspNetHostingPermission(SecurityAction.Demand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  <AspNetHostingPermission(SecurityAction.InheritanceDemand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  Public Class WeatherWebPart
    Inherits WebPart
    Private _provider As IZipCode
    Private _zipSearch As String
    Private DisplayContent As Label

    ' This method is identified by the ConnectionConsumer 
    ' attribute, and is the mechanism for connecting with 
    ' the provider. 
    <ConnectionConsumer("Zip Code", "ZipCodeConsumer")> _
    Public Sub GetIZipCode(ByVal Provider As IZipCode)
      _provider = Provider
    End Sub


    Protected Overrides Sub OnPreRender(ByVal e As EventArgs)
      EnsureChildControls()

      If Not (Me._provider Is Nothing) Then
        _zipSearch = _provider.ZipCode.Trim()
                DisplayContent.Text = "My Zip Code is:  " + _zipSearch
      End If

    End Sub

    Protected Overrides Sub CreateChildControls()
      Controls.Clear()
      DisplayContent = New Label()
      Me.Controls.Add(DisplayContent)

    End Sub

  End Class

End Namespace

程式代碼範例的第三個部分是網頁。請注意，在頂端附近，它包含 Register 指示詞，可向控件註冊用戶控件和動態編譯的 WebPart 元件。頁面有兩個主要方法。方法 Button1_Click 會在控件之間建立連接，而 Button2_Click 方法會中斷控件的連接。

<%@ Page Language="C#" %>
<%@ Register TagPrefix="uc1" 
    TagName="DisplayModeMenuCS"
    Src="~/displaymodemenucs.ascx" %>
<%@ Register TagPrefix="aspSample" 
    Namespace="Samples.AspNet.CS.Controls" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    
  protected void Button1_Click(object sender, EventArgs e)
  {
    ProviderConnectionPoint provPoint =
      mgr.GetProviderConnectionPoints(zip1)["ZipCodeProvider"];
    ConsumerConnectionPoint connPoint =
      mgr.GetConsumerConnectionPoints(weather1)["ZipCodeConsumer"];
    WebPartConnection conn1 = mgr.ConnectWebParts(zip1, provPoint,
      weather1, connPoint);
  }

  protected void Button2_Click(object sender, EventArgs e)
  {
    if (mgr.Connections.Count >= 1 && mgr.Connections[0] != null)
      mgr.DisconnectWebParts(mgr.Connections[0]);
  }
  

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="mgr" runat="server">
      </asp:WebPartManager>
      <uc1:DisplayModeMenuCS ID="menu1" runat="server" />
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <aspSample:ZipCodeWebPart ID="zip1" runat="server"
            Title="Zip Code Provider" />
          <aspSample:WeatherWebPart ID="weather1" runat="server" 
            Title="Zip Code Consumer" />
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:ConnectionsZone ID="ConnectionsZone1" runat="server">
      </asp:ConnectionsZone>
      <asp:Button ID="Button1" runat="server" 
        Text="Connect WebPart Controls" 
        OnClick="Button1_Click" />
      <asp:Button ID="Button2" runat="server" 
        Text="Disconnect WebPart Controls" 
        OnClick="Button2_Click" />
    </div>
    </form>
</body>
</html>

<%@ Page Language="vb" %>
<%@ Register TagPrefix="uc1" 
    TagName="DisplayModeMenuVB"
    Src="~/displaymodemenuvb.ascx" %>
<%@ Register TagPrefix="aspSample" 
    Namespace="Samples.AspNet.VB.Controls" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Protected Sub Button1_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs)
    
    Dim mgr As WebPartManager = _
      WebPartManager.GetCurrentWebPartManager(Page)
    Dim provPoint As ProviderConnectionPoint = _
      mgr.GetProviderConnectionPoints(zip1)("ZipCodeProvider")
    Dim connPoint As ConsumerConnectionPoint = _
      mgr.GetConsumerConnectionPoints(weather1)("ZipCodeConsumer")
    mgr.ConnectWebParts(zip1, provPoint, weather1, connPoint)

  End Sub
  
  Protected Sub Button2_Click(ByVal sender as Object, _
    ByVal e as System.EventArgs)
    
    If mgr.Connections.Count >= 1 AndAlso _
      mgr.Connections(0) IsNot Nothing Then
      mgr.DisconnectWebParts(mgr.Connections(0))
    End If
    
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="mgr" runat="server">
      </asp:WebPartManager>
      <uc1:DisplayModeMenuVB ID="menu1" runat="server" />
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <aspSample:ZipCodeWebPart ID="zip1" runat="server"
            Title="Zip Code Provider" />
          <aspSample:WeatherWebPart ID="weather1" runat="server" 
            Title="Zip Code Consumer" />
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:ConnectionsZone ID="ConnectionsZone1" runat="server">
      </asp:ConnectionsZone>
      <asp:Button ID="Button1" runat="server" 
        Text="Connect WebPart Controls" 
        OnClick="Button1_Click" />
      <asp:Button ID="Button2" runat="server" 
        Text="Disconnect WebPart Controls" 
        OnClick="Button2_Click" />
    </div>
    </form>
</body>
</html>

載入頁面之後，您可以按兩下 [ 連線 ] 按鈕來連接控制件。如果您在文字框控制件中輸入一些文字，然後按下 [輸入 ] 按鈕，文字將會顯示在連接的控件中， (如果控件已中斷連線，則不會顯示該文字) 。如果您按兩下 [ 中斷連線 ] 按鈕，控制件將會中斷連線。您可以使用 [顯示模式 ] 下拉式清單控件，將頁面切換為 [連線 ] 模式，來驗證控件的連線狀態。執行此動作之後，按兩下其中一個控件標題列中的箭號) 所代表的動詞功能表 (，然後選取 [連接 ] 專案。隨即顯示連線 UI;它可供使用，因為 <asp:connectionszone> 頁面中有宣告的專案。您也可以從此 UI 連線和中斷控件連線。

備註

當您傳遞 connection 參數時，方法DisconnectWebParts會執行結束或伺服器控制件之間WebPart連線的完整程式。

當您將元素放在 <asp:connectionszone> 網頁時，這個方法可用來中斷控件的連線，以提供使用者介面 (UI) 來管理連線。當頁面處於連線顯示模式 (ConnectDisplayMode) ，且目前連線存在時，使用者可以按兩下呼叫方法來結束連線的按鈕 DisconnectWebParts 。

如果您想要以程式設計方式中斷控件的連線，而不需要將元素新增<asp:connectionszone>至頁面，您也可以直接從程式代碼呼叫 DisconnectWebParts 方法。

給繼承者的注意事項

如果您想要變更中斷WebPart連線控件的默認實作，可以覆寫 DisconnectWebParts(WebPartConnection) 方法。如果您確實覆寫方法，而且只要將一些實作新增至現有的方法，就可以在執行自己的程序代碼之前呼叫基底方法。

適用於

共用方式為

WebPartManager.DisconnectWebParts(WebPartConnection) 方法

定義

參數

例外狀況

範例

備註

給繼承者的注意事項

適用於

另請參閱

其他資源