次の方法で共有

HttpApplicationState.RemoveAt(Int32) メソッド

  • リファレンス

定義

名前空間:
System.Web
アセンブリ:
System.Web.dll

HttpApplicationState オブジェクトをコレクションからインデックスを使用して削除します。

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

パラメーター

index
Int32

削除する項目のコレクション内の位置。

例

次のコード例では、2 つのアプリケーション変数をコレクションに挿入し、 メソッドを RemoveAt 使用してカスタム HttpApplicationState オブジェクトの最初の変数を削除する方法を示します。

<%@ 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>

適用対象