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AttributeCollection.Keys Proprietà

  • Riferimento

Definizione

Spazio dei nomi:
System.Web.UI
Assembly:
System.Web.dll

Ottiene un insieme di chiavi per tutti gli attributi nell'oggetto AttributeCollection del controllo server.

public:
 property System::Collections::ICollection ^ Keys { System::Collections::ICollection ^ get(); };
public System.Collections.ICollection Keys { get; }
member this.Keys : System.Collections.ICollection
Public ReadOnly Property Keys As ICollection

Valore della proprietà

ICollection

Raccolta di chiavi.

Esempio

Nell'esempio seguente viene illustrato come scorrere la Keys proprietà dell'oggetto AttributeCollection per un HtmlSelect controllo server.

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

<script language="C#" runat="server">

    void Page_Load(Object Src, EventArgs e)
    {
       Message.InnerHtml += 
           "<h5>The FirstSelect select box's " + 
           "Attribute collection contains:</h5>";
       
       IEnumerator keys = 
           FirstSelect.Attributes.Keys.GetEnumerator();
 
       while (keys.MoveNext())
       {
           String key = (String)keys.Current;
           Message.InnerHtml += key + "=" + 
               FirstSelect.Attributes[key] + "<br />";
       }
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Attribute Collection Sample</title>
</head>
<body>

    <p>
        <span id="Message" enableviewstate="false" 
            runat="server" />
    </p>
    <p>
        Make a selection:
        <select id="FirstSelect" runat="server" 
           style="padding:1; width:40; font: 16pt verdana;
           background-color:Aqua; color:black;">
           <option>This</option>
           <option>That</option>
           <option>Other</option>
        </select>
    </p>

</body>
</html>

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

<script language="VB" runat="server">
     Sub Page_Load(Src As Object, e As EventArgs)
         Message.InnerHtml = Message.InnerHtml & _
             "<h5>The FirstSelect select box's " & _
             "Attribute collection contains:</h5>"

         Dim keys As IEnumerator = _
             FirstSelect.Attributes.Keys.GetEnumerator

         Do While keys.MoveNext
             Dim key As String = keys.Current
             Message.InnerHtml = Message.InnerHtml & key _
                 & "=" & FirstSelect.Attributes(key) & "<br />"
         Loop
     End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Attribute Collection Sample</title>
</head>
<body>

    <p>
        <span id="Message" enableviewstate="false" 
            runat="server" />
    </p>
    <p>
        Make a selection:
        <select id="FirstSelect" runat="server" 
           style="padding:1; width:40; font: 16pt verdana;
           background-color:Aqua; color:black;">
           <option>This</option>
           <option>That</option>
           <option>Other</option>
        </select>
    </p>

</body>
</html>

Commenti

Questa proprietà contiene tutte le chiavi incluse in AttributeCollection un controllo server di ASP.NET, indipendentemente dal fatto che siano state aggiunte a livello di codice con il Add metodo o dichiarative.

Si applica a

Vedi anche