ConnectionPoint.GetEnabled(Control) メソッド

定義

コネクション ポイントが接続に参加できるかどうかを示す値を取得します。

public:
 virtual bool GetEnabled(System::Web::UI::Control ^ control);
public virtual bool GetEnabled (System.Web.UI.Control control);
abstract member GetEnabled : System.Web.UI.Control -> bool
override this.GetEnabled : System.Web.UI.Control -> bool
Public Overridable Function GetEnabled (control As Control) As Boolean

パラメーター

control
Control

コネクション ポイントに関連付けられている WebPart またはその他のサーバー コントロール。

戻り値

コントロールが接続に参加するためのコネクション ポイントを作成できる場合は true。それ以外の場合は false

次のコード例では、 オブジェクトと ConsumerConnectionPoint オブジェクトの両方ProviderConnectionPointで メソッドをGetEnabled使用する方法を示します。 このコード例では、 プロパティにアクセスするコードを含む Web ページのみを示しています。この例を実行するために必要な完全なコードについては、クラスの概要の「例」セクションを ConnectionPoint 参照してください。

Web ページの Button2_Click メソッドのコードは、各接続ポイント オブジェクトの メソッドにアクセス GetEnabled し、各値をラベルに書き込みます。 ページがブラウザーに読み込まれた後、[ 接続ポイントの詳細 ] ボタンをクリックしてコードを実行します。

<%@ 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"];
      
    if(mgr.CanConnectWebParts(zip1, provPoint, weather1, connPoint))
      mgr.ConnectWebParts(zip1, provPoint, weather1, connPoint);
  
  }  
  protected void Button2_Click(object sender, EventArgs e)
  {
    WebPartConnection conn = mgr.Connections[0];
    
    lblConn.Text = "<h2>Connection Point Details</h2>" + 
       "<h3>Provider Connection Point</h3>" + 
       "  Display name: " + conn.ProviderConnectionPoint.DisplayName + 
       "<br />" + 
       "  ID: " + conn.ProviderConnectionPoint.ID + 
       "<br />" + 
       "  Interface type: " + 
        conn.ProviderConnectionPoint.InterfaceType.ToString() + 
       "<br />" + 
       "  Control type: " + conn.ProviderConnectionPoint.ControlType.ToString() + 
       "<br />" + 
       "  Allows multiple connections: " + 
          conn.ProviderConnectionPoint.AllowsMultipleConnections.ToString() + 
       "<br />" + 
       "  Enabled: " + conn.ProviderConnectionPoint.GetEnabled(zip1).ToString() + 
       "<hr />" + 
       "<h3>Consumer Connection Point</h3>" + 
       "  Display name: " + conn.ConsumerConnectionPoint.DisplayName + 
       "<br />" + 
       "  ID: " + conn.ConsumerConnectionPoint.ID + 
       "<br />" + 
       "  Interface type: " + conn.ConsumerConnectionPoint.InterfaceType.ToString() + 
       "<br />" + 
       "  Control type: " + conn.ConsumerConnectionPoint.ControlType.ToString() + 
       "<br />" + 
       "  Allows multiple connections: " + 
          conn.ConsumerConnectionPoint.AllowsMultipleConnections.ToString() + 
       "<br />" + 
       "  Enabled: " + conn.ConsumerConnectionPoint.GetEnabled(zip1).ToString();
  }

  protected void Page_Load(object sender, EventArgs e)
  {
    lblConn.Text = String.Empty;
  }
</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" >
        <StaticConnections>
          <asp:WebPartConnection ID="conn1"
            ConsumerConnectionPointID="ZipCodeConsumer"
            ConsumerID="weather1" 
            ProviderConnectionPointID="ZipCodeProvider" 
            ProviderID="zip1" />
        </StaticConnections>      
      </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="Dynamic Connection" 
        OnClick="Button1_Click" />      
      <br />
      <asp:Button ID="Button2" runat="server" 
        Text="Connection Point Details" 
        OnClick="Button2_Click" />
      <br />
      <asp:Label ID="lblConn" runat="server" />
    </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 provPoint As ProviderConnectionPoint = _
      mgr.GetProviderConnectionPoints(zip1)("ZipCodeProvider")
    Dim connPoint As ConsumerConnectionPoint = _
      mgr.GetConsumerConnectionPoints(weather1)("ZipCodeConsumer")

    If mgr.CanConnectWebParts(zip1, provPoint, weather1, connPoint) Then
      mgr.ConnectWebParts(zip1, provPoint, weather1, connPoint)
    End If
    
  End Sub
  
  Protected Sub Button2_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs)
    
    Dim conn As WebPartConnection = mgr.Connections(0)

    lblConn.Text = "<h2>Connection Point Details</h2>" & _
      "<h3>Provider Connection Point</h3>" & _
      "  Display name: " & conn.ProviderConnectionPoint.DisplayName & _
      "<br />" & _
      "  ID: " & conn.ProviderConnectionPoint.ID & _
      "<br />" & _
      "  Interface type: " & conn.ProviderConnectionPoint.InterfaceType.ToString() & _
      "<br />" & _
      "  Control type: " & conn.ProviderConnectionPoint.ControlType.ToString() & _
      "<br />" & _
      "  Allows multiple connections: " & _
        conn.ProviderConnectionPoint.AllowsMultipleConnections.ToString() & _
      "<br />" & _
      "  Enabled: " & conn.ProviderConnectionPoint.GetEnabled(zip1).ToString() & _
      "<hr />" & _
      "<h3>Consumer Connection Point</h3>" & _
      "  Display name: " & conn.ConsumerConnectionPoint.DisplayName & _
      "<br />" & _
      "  ID: " & conn.ConsumerConnectionPoint.ID & _
      "<br />" & _
      "  Interface type: " & conn.ConsumerConnectionPoint.InterfaceType.ToString() & _
      "<br />" & _
      "  Control type: " & conn.ConsumerConnectionPoint.ControlType.ToString() & _
      "<br />" & _
      "  Allows multiple connections: " & _
        conn.ConsumerConnectionPoint.AllowsMultipleConnections.ToString() & _
      "<br />" & _
      "  Enabled: " & conn.ConsumerConnectionPoint.GetEnabled(zip1).ToString()
          
  End Sub

  Protected Sub Page_Load(ByVal sender As Object, _
    ByVal e As System.EventArgs)
    lblConn.Text = String.Empty
  End Sub
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="mgr" runat="server" >
        <StaticConnections>
          <asp:WebPartConnection ID="conn1"
            ConsumerConnectionPointID="ZipCodeConsumer"
            ConsumerID="weather1" 
            ProviderConnectionPointID="ZipCodeProvider" 
            ProviderID="zip1" />
        </StaticConnections>      
      </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="Dynamic Connection" 
        OnClick="Button1_Click" />      
      <br />
      <asp:Button ID="Button2" runat="server" 
        Text="Connection Point Details" 
        OnClick="Button2_Click" />
      <br />
      <asp:Label ID="lblConn" runat="server" />
    </div>
    </form>
</body>
</html>

注釈

基底ConnectionPointクラスの メソッドはGetEnabled常に を返trueしますが、派生クラスは、 の状態controlに基づいて、メソッドをオーバーライドして、または異なる時刻に メソッドtruefalseをオーバーライドできます。

適用対象

こちらもご覧ください