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NextPreviousPagerField Konstruktor

  • Reference

Definice

Obor názvů:
System.Web.UI.WebControls
Sestavení:
System.Web.Extensions.dll

Inicializuje novou instanci NextPreviousPagerField třídy .

public:
 NextPreviousPagerField();
public NextPreviousPagerField ();
Public Sub New ()

Příklady

Následující příklad ukazuje, jak použít konstruktor k dynamickému přidání objektu NextPreviousPagerFieldDataPager do ovládacího prvku.

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

  // <Snippet2>  
  void Page_Load(Object sender, EventArgs e)
  {
    
    // Dynamically generated field pagers need to be created only 
    // the first time the page is loaded.
    
    if (!IsPostBack)
    {
      // Create a NextPreviousPagerField object to display
      // the buttons to navigate.
      NextPreviousPagerField pagerField = new NextPreviousPagerField();
      pagerField.ShowFirstPageButton = true;
      pagerField.ShowLastPageButton = true;
      pagerField.ButtonType = ButtonType.Button;

      // Add the pager field to the Fields collection of the
      // DataPager control.
      ContactsDataPager.Fields.Add(pagerField);
    }

    ContactsListView.DataBind();
  
  }
  // </Snippet2>
  
</script>
    
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>NextPreviousPagerField Constructor Example</title>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>NextPreviousPagerField Constructor Example</h3>
          
      <asp:ListView ID="ContactsListView" 
        DataSourceID="ContactsDataSource"
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" width="640px" border="1" runat="server" id="tblContacts">
            <tr id="itemPlaceholder" runat="server">
            </tr>
          </table>
        </LayoutTemplate>
        <ItemTemplate>
          <tr runat="server">
            <td>
              <asp:Label ID="IDLabel" runat="server" Text='<%#Eval("ContactID") %>' />
            </td>            
            <td>
              <asp:Label ID="FirstNameLabel" runat="server" Text='<%#Eval("FirstName") %>' />
            </td>
            <td>
              <asp:Label ID="LastNameLabel" runat="server" Text='<%#Eval("LastName") %>' />
            </td>
          </tr>
        </ItemTemplate>
      </asp:ListView>

      <asp:DataPager runat="server" ID="ContactsDataPager" PagedControlID="ContactsListView" />

      <!-- This example uses Microsoft SQL Server and connects      -->
      <!-- to the AdventureWorks sample database. Use an ASP.NET    -->
      <!-- expression to retrieve the connection string value       -->
      <!-- from the Web.config file.                                -->
      <asp:SqlDataSource ID="ContactsDataSource" runat="server" 
        ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
        SelectCommand="SELECT [ContactID], [FirstName], [LastName] FROM Person.Contact">
      </asp:SqlDataSource>
      
    </form>
  </body>
</html>

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

  ' <Snippet2>
  Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    
    ' Dynamically generated field pagers need to be created only 
    ' the first time the page is loaded.

    If Not IsPostBack Then
      ' Create a NextPreviousPagerField object to display
      ' the buttons to navigate.
      Dim pagerField As New NextPreviousPagerField()
      pagerField.ShowFirstPageButton = True
      pagerField.ShowLastPageButton = True
      pagerField.ButtonType = ButtonType.Button
  
      ' Add the pager field to the Fields collection of the
      ' DataPager control.
      ContactsDataPager.Fields.Add(pagerField)
    End If
        
    ContactsListView.DataBind()

  End Sub
  ' </Snippet2>
  
</script>
    
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>NextPreviousPagerField Constructor Example</title>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>NextPreviousPagerField Constructor Example</h3>
          
      <asp:ListView ID="ContactsListView" 
        DataSourceID="ContactsDataSource"
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" width="640px" border="1" runat="server" id="tblContacts">
            <tr id="itemPlaceholder" runat="server">
            </tr>
          </table>
        </LayoutTemplate>
        <ItemTemplate>
          <tr runat="server">
            <td>
              <asp:Label ID="IDLabel" runat="server" Text='<%#Eval("ContactID") %>' />
            </td>            
            <td>
              <asp:Label ID="FirstNameLabel" runat="server" Text='<%#Eval("FirstName") %>' />
            </td>
            <td>
              <asp:Label ID="LastNameLabel" runat="server" Text='<%#Eval("LastName") %>' />
            </td>
          </tr>
        </ItemTemplate>
      </asp:ListView>

      <asp:DataPager runat="server" ID="ContactsDataPager" PagedControlID="ContactsListView" />

      <!-- This example uses Microsoft SQL Server and connects      -->
      <!-- to the AdventureWorks sample database. Use an ASP.NET    -->
      <!-- expression to retrieve the connection string value       -->
      <!-- from the Web.config file.                                -->
      <asp:SqlDataSource ID="ContactsDataSource" runat="server" 
        ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
        SelectCommand="SELECT [ContactID], [FirstName], [LastName] FROM Person.Contact">
      </asp:SqlDataSource>
      
    </form>
  </body>
</html>

Poznámky

Pomocí konstruktoru NextPreviousPagerField inicializujete novou instanci NextPreviousPagerField třídy . Tento konstruktor se obvykle používá při přidávání polí do dynamicky vytvářeného DataPager ovládacího prvku.

Pokud chcete do DataPager ovládacího prvku dynamicky přidat NextPreviousPagerField objekt, vytvořte nový NextPreviousPagerField objekt, nastavte jeho vlastnosti a pak ho přidejte do kolekce DataPager polí ovládacího prvku.

Platí pro

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