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HttpApplicationState.RemoveAt(Int32) Methode

  • Referenz

Definition

Namespace:
System.Web
Assembly:
System.Web.dll

Entfernt ein HttpApplicationState-Objekt anhand des Indexes aus der Auflistung.

public:
 void RemoveAt(int index);
public void RemoveAt (int index);
member this.RemoveAt : int -> unit
Public Sub RemoveAt (index As Integer)

Parameter

index
Int32

Die Position des zu entfernenden Elements in der Auflistung.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie sie zwei Anwendungsvariablen in die Auflistung einfügen und dann die Methode verwenden, um die RemoveAt erste Variable in einem benutzerdefinierten HttpApplicationState Objekt zu entfernen.

<%@ Page language="c#" AutoEventWireup="true" %>
<!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>
    <title>HttpApplicationState - RemoveAt - C# Example</title>
    <script runat="server">
      void Page_Load(Object sender, EventArgs e) 
      {
          // Add two new application state variables.
          Application.Add("City", "Redmond");
          Application.Add("State", "WA");
        
          // Show the contents of both application state variables.
          Label1.Text = "Application.Keys[0] contains: " + Application.Keys[0].ToString();
          Label1.Text += "<br />Application.Keys[1] contains: " + Application.Keys[1].ToString();
              
          // Remove the City application state variable, which is at
          // the first index location.
          Application.RemoveAt(0);
          Label2.Text = "<br />Call:  Application.RemoveAt(0)";
              
          // Show the contents of the application state variable,
          // in the first index location, which is now the State variable.
          Label3.Text = "<br />Application.Keys[0] contains: " + Application.Keys[0].ToString();
      }
    </script>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
            <h3>HttpApplicationState - RemoveAt - C# Example</h3>
      <asp:Label id="Label1" runat="server" /><br />
      <asp:Label id="Label2" runat="server" /><br />
      <asp:Label id="Label3" runat="server" />
    </form>
  </body>
</html>

<%@ Page language="VB" AutoEventWireup="true" %>
<!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>
    <title>HttpApplicationState - RemoveAt - VB.NET Example</title>
    <script runat="server">
      Sub Page_Load(sender As Object, e As EventArgs)

          ' Add two new application state variables.
          Application.Add("City", "Redmond")
          Application.Add("State", "WA")
        
          ' Show the contents of both application state variables.
          Label1.Text = "Application.Keys(0) contains: " & Application.Keys(0).ToString()
          Label1.Text += "<br />Application.Keys(1) contains: " & Application.Keys(1).ToString()
              
          ' Remove the City application state variable, which is at
          ' the first index location.
          Application.RemoveAt(0)
          Label2.Text = "<br />Call:  Application.RemoveAt(0)"
              
          ' Show the contents of the application state variable,
          ' in the first index location, which is now the State variable.
          Label3.Text = "<br />Application.Keys(0) contains: " & Application.Keys(0).ToString()
      End Sub
    </script>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
            <h3>HttpApplicationState - RemoveAt - VB.NET Example</h3>
      <asp:Label id="Label1" runat="server" /><br />
      <asp:Label id="Label2" runat="server" /><br />
      <asp:Label id="Label3" runat="server" />
    </form>
  </body>
</html>

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