SqlMembershipProvider.GetNumberOfUsersOnline 方法

參考

定義

命名空間:: System.Web.Security

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。

傳回目前存取應用程式的使用者數。

public:
 override int GetNumberOfUsersOnline();

public override int GetNumberOfUsersOnline ();

override this.GetNumberOfUsersOnline : unit -> int

Public Overrides Function GetNumberOfUsersOnline () As Integer

傳回

Int32

目前存取應用程式的使用者數目。

範例

下列程式代碼範例會傳回目前在線用戶計數的用戶清單。

注意

這個範例會 Membership 使用類別呼叫 SqlMembershipProvider 指定做為 defaultProvider Web.config 檔案中的。如果您需要存取預設提供者做為類型 SqlMembershipProvider，您可以轉換 Provider 類別的 Membership 屬性。若要以特定提供者類型存取其他已設定的提供者，您可以使用類別 Providers 的 Membership 屬性來存取這些提供者，並將其轉換成特定提供者類型。

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

int pageSize = 5;
int totalUsers;
int totalPages;
int currentPage = 1;

public void Page_Load()
{
  if (!IsPostBack)
  {
    GetUsers();
  }
}

private void GetUsers()
{
  UsersOnlineLabel.Text = Membership.GetNumberOfUsersOnline().ToString();

  UserGrid.DataSource = Membership.GetAllUsers(currentPage-1, pageSize, out totalUsers);
  totalPages = ((totalUsers - 1) / pageSize) + 1;

  // Ensure that we do not navigate past the last page of users.

  if (currentPage > totalPages)
  {
    currentPage = totalPages;
    GetUsers();
    return;
  }

  UserGrid.DataBind();
  CurrentPageLabel.Text = currentPage.ToString();
  TotalPagesLabel.Text = totalPages.ToString();

  if (currentPage == totalPages)
    NextButton.Visible = false;
  else
    NextButton.Visible = true;

  if (currentPage == 1)
    PreviousButton.Visible = false;
  else
    PreviousButton.Visible = true;

  if (totalUsers <= 0)
    NavigationPanel.Visible = false;
  else
    NavigationPanel.Visible = true;
}

public void NextButton_OnClick(object sender, EventArgs args)
{
  currentPage = Convert.ToInt32(CurrentPageLabel.Text);
  currentPage++;
  GetUsers();
}

public void PreviousButton_OnClick(object sender, EventArgs args)
{
  currentPage = Convert.ToInt32(CurrentPageLabel.Text);
  currentPage--;
  GetUsers();
}

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Find Users</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>User List</h3>

  Number of Users Online: <asp:Label id="UsersOnlineLabel" runat="Server" /><br />

  <asp:Panel id="NavigationPanel" Visible="false" runat="server">
    <table border="0" cellpadding="3" cellspacing="3">
      <tr>
        <td style="width:100">Page <asp:Label id="CurrentPageLabel" runat="server" />
            of <asp:Label id="TotalPagesLabel" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="PreviousButton" Text="< Prev"
                            OnClick="PreviousButton_OnClick" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="NextButton" Text="Next >"
                            OnClick="NextButton_OnClick" runat="server" /></td>
      </tr>
    </table>
  </asp:Panel>

  <asp:DataGrid id="UserGrid" runat="server"
                CellPadding="2" CellSpacing="1"
                Gridlines="Both">
    <HeaderStyle BackColor="darkblue" ForeColor="white" />
  </asp:DataGrid>

</form>

</body>
</html>

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

Dim pageSize As Integer = 5
Dim totalUsers As Integer
Dim totalPages As Integer
    Dim currentPage As Integer = 1

Public Sub Page_Load()
  If Not IsPostBack Then
    GetUsers()
  End If
End Sub

Private Sub GetUsers()
  UsersOnlineLabel.Text = Membership.GetNumberOfUsersOnline().ToString()

  UserGrid.DataSource = Membership.GetAllUsers(currentPage-1, pageSize, totalUsers)
  totalPages = ((totalUsers - 1) \ pageSize) + 1

  ' Ensure that we do not navigate past the last page of users.

  If currentPage > totalPages Then
    currentPage = totalPages
    GetUsers()
    Return
  End If

  UserGrid.DataBind()
  CurrentPageLabel.Text = currentPage.ToString()
  TotalPagesLabel.Text = totalPages.ToString()

  If currentPage = totalPages Then
    NextButton.Visible = False
  Else
    NextButton.Visible = True
  End If

  If currentPage = 1 Then
    PreviousButton.Visible = False
  Else
    PreviousButton.Visible = True
  End If

  If totalUsers <= 0 Then
    NavigationPanel.Visible = False
  Else
    NavigationPanel.Visible = True
  End If
End SUb

Public Sub NextButton_OnClick(sender As Object, args As EventArgs)
  currentPage = Convert.ToInt32(CurrentPageLabel.Text)
  currentPage += 1
  GetUsers()
End Sub

Public Sub PreviousButton_OnClick(sender As Object, args As EventArgs)
  currentPage = Convert.ToInt32(CurrentPageLabel.Text)
  currentPage -= 1
  GetUsers()
End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Find Users</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>User List</h3>

  Number of Users Online: <asp:Label id="UsersOnlineLabel" runat="Server" /><br />

  <asp:Panel id="NavigationPanel" Visible="false" runat="server">
    <table border="0" cellpadding="3" cellspacing="3">
      <tr>
        <td style="width:100">Page <asp:Label id="CurrentPageLabel" runat="server" />
            of <asp:Label id="TotalPagesLabel" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="PreviousButton" Text="< Prev"
                            OnClick="PreviousButton_OnClick" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="NextButton" Text="Next >"
                            OnClick="NextButton_OnClick" runat="server" /></td>
      </tr>
    </table>
  </asp:Panel>

  <asp:DataGrid id="UserGrid" runat="server"
                CellPadding="2" CellSpacing="1"
                Gridlines="Both">
    <HeaderStyle BackColor="darkblue" ForeColor="white" />
  </asp:DataGrid>

</form>

</body>
</html>

備註

類別會 Membership 呼叫這個方法，以從 ASP.NET 應用程式組態檔 (Web.config) 中指定的 SQL Server 資料庫擷取在線考慮的用戶數目。

GetNumberOfUsersOnline 會傳回目前應用程式的用戶數目，其上次活動日期和時間大於目前日期和時間，以 UserIsOnlineTimeWindow 分鐘為單位的屬性值。

只有與設定 ApplicationName 相關聯的使用者才會包含在計數中。

適用於

另請參閱

ASP.NET 成員資格簡介

共用方式為

SqlMembershipProvider.GetNumberOfUsersOnline 方法

定義

傳回

範例

備註

適用於

另請參閱

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