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DataGrid.PageCount-Eigenschaft

  • Artikel

Ruft die Anzahl der für die Anzeige der Elemente im DataGrid-Steuerelement insgesamt benötigten Seiten ab.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

Syntax

'Declaration
Public ReadOnly Property PageCount As Integer
'Usage
Dim instance As DataGrid
Dim value As Integer

value = instance.PageCount

public int PageCount { get; }

public:
property int PageCount {
    int get ();
}

/** @property */
public int get_PageCount ()

public function get PageCount () : int

Eigenschaftenwert

Die Anzahl der für die Anzeige der Elemente im DataGrid-Steuerelement insgesamt benötigten Seiten.

Hinweise

Bestimmen Sie mit dieser Eigenschaft die Anzahl der für die Anzeige der Elemente im DataGrid-Steuerelement benötigten Seiten programmgesteuert. Diese Eigenschaft wird nur verwendet, wenn die AllowPaging-Eigenschaft auf true festgelegt ist.

Beispiel

Das folgende Codebeispiel veranschaulicht, wie mit der PageCount-Eigenschaft die Anzahl der Seiten bestimmt wird, die für die Anzeige der Elemente im DataGrid-Steuerelement benötigt wird.

<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
 <html>
 <script language="VB" runat="server">
 Function CreateDataSource() As ICollection
    Dim dt As New DataTable()
    Dim dr As DataRow
    
    dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
    dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
    dt.Columns.Add(New DataColumn("DateTimeValue", GetType(String)))
    dt.Columns.Add(New DataColumn("BoolValue", GetType(Boolean)))
    
    Dim i As Integer
    For i = 0 To 99
        dr = dt.NewRow()
        
        dr(0) = i
        dr(1) = "Item " & i.ToString()
        dr(2) = DateTime.Now.ToShortDateString()
        If i Mod 2 <> 0 Then
            dr(3) = True
        Else
            dr(3) = False
        End If
        
        dt.Rows.Add(dr)
    Next i
    
    Dim dv As New DataView(dt)
    Return dv
End Function 'CreateDataSource


Sub Page_Load(sender As Object, e As EventArgs)
    If chk1.Checked Then
        MyDataGrid.PagerStyle.Mode = PagerMode.NumericPages
    Else
        MyDataGrid.PagerStyle.Mode = PagerMode.NextPrev
    End If 
    BindGrid()
End Sub 'Page_Load


Sub MyDataGrid_Page(sender As Object, e As DataGridPageChangedEventArgs)
    MyDataGrid.CurrentPageIndex = e.NewPageIndex
    BindGrid()
End Sub 'MyDataGrid_Page


Sub BindGrid()
    MyDataGrid.DataSource = CreateDataSource()
    MyDataGrid.DataBind()
    ShowStats()
End Sub 'BindGrid


Sub ShowStats()
    lblEnabled.Text = "AllowPaging is " & MyDataGrid.AllowPaging
    lblCurrentIndex.Text = "CurrentPageIndex is " & MyDataGrid.CurrentPageIndex
    lblPageCount.Text = "PageCount is " & MyDataGrid.PageCount
    lblPageSize.Text = "PageSize is " & MyDataGrid.PageSize
End Sub 'ShowStats

 
 
 </script>
 
 <body>
 
    <h3>DataGrid Paging Example</h3>
 
    <form runat=server>
 
       <asp:DataGrid id="MyDataGrid" runat="server"
            AllowPaging="True"
            PageSize="10"
            OnPageIndexChanged="MyDataGrid_Page"
            BorderColor="black"
            BorderWidth="1"
            GridLines="Both"
            CellPadding="3"
            CellSpacing="0"
            Font-Name="Verdana"
            Font-Size="8pt">

            <PagerStyle Mode="NumericPages"
                        HorizontalAlign="Right">
            </PagerStyle>


            <HeaderStyle BackColor="#aaaadd">
            </HeaderStyle>

            <AlternatingItemStyle BackColor="#eeeeee">
            </AlternatingItemStyle>

       </asp:DataGrid>
 
       <p>
 
       <asp:Checkbox id="chk1" runat="server"
            Text="Show numeric page navigation buttons"
            Font-Name="Verdana"
            Font-Size="8pt"
            AutoPostBack="true"/>
 
       <p>
 
       <table bgcolor="#eeeeee" cellpadding="6">
          <tr>
             <td nowrap>
                
 
                   <asp:Label id="lblEnabled" 
                        runat="server"/><br>
                   <asp:Label id="lblCurrentIndex" 
                        runat="server"/><br>
                   <asp:Label id="lblPageCount" 
                        runat="server"/><br>
                   <asp:Label id="lblPageSize" 
                        runat="server"/><br>
 
                
             </td>
          </tr>
       </table>
 
    </form>
 
 </body>
 </html>
   

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
 <html>
 <script language="C#" runat="server">
 
    ICollection CreateDataSource() 
    {
       DataTable dt = new DataTable();
       DataRow dr;
 
       dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
       dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
       dt.Columns.Add(new DataColumn("DateTimeValue", typeof(string)));
       dt.Columns.Add(new DataColumn("BoolValue", typeof(bool)));
 
       for (int i = 0; i < 100; i++) 
       {
          dr = dt.NewRow();
 
          dr[0] = i;
          dr[1] = "Item " + i.ToString();
          dr[2] = DateTime.Now.ToShortDateString();
          dr[3] = (i % 2 != 0) ? true : false;
 
          dt.Rows.Add(dr);
       }
 
       DataView dv = new DataView(dt);
       return dv;
    }
 
    void Page_Load(Object sender, EventArgs e) 
    {
       if (chk1.Checked)
          MyDataGrid.PagerStyle.Mode = PagerMode.NumericPages;
       else 
          MyDataGrid.PagerStyle.Mode = PagerMode.NextPrev;
 
       BindGrid();
    }
 
    void MyDataGrid_Page(Object sender, DataGridPageChangedEventArgs e) 
    {
       MyDataGrid.CurrentPageIndex = e.NewPageIndex;
       BindGrid();
    }
 
    void BindGrid() 
    {
       MyDataGrid.DataSource = CreateDataSource();
       MyDataGrid.DataBind();
       ShowStats();
    }
 
    void ShowStats() 
    {
       lblEnabled.Text = "AllowPaging is " + MyDataGrid.AllowPaging;
       lblCurrentIndex.Text = "CurrentPageIndex is " + MyDataGrid.CurrentPageIndex;
       lblPageCount.Text = "PageCount is " + MyDataGrid.PageCount;
       lblPageSize.Text = "PageSize is " + MyDataGrid.PageSize;
    }
 
 
 </script>
 
 <body>
 
    <h3>DataGrid Paging Example</h3>
 
    <form runat=server>
 
       <asp:DataGrid id="MyDataGrid" runat="server"
            AllowPaging="True"
            PageSize="10"
            OnPageIndexChanged="MyDataGrid_Page"
            BorderColor="black"
            BorderWidth="1"
            GridLines="Both"
            CellPadding="3"
            CellSpacing="0"
            Font-Name="Verdana"
            Font-Size="8pt">

            <PagerStyle Mode="NumericPages"
                        HorizontalAlign="Right">
            </PagerStyle>


            <HeaderStyle BackColor="#aaaadd">
            </HeaderStyle>

            <AlternatingItemStyle BackColor="#eeeeee">
            </AlternatingItemStyle>

       </asp:DataGrid>
 
       <p>
 
       <asp:Checkbox id="chk1" runat="server"
            Text="Show numeric page navigation buttons"
            Font-Name="Verdana"
            Font-Size="8pt"
            AutoPostBack="true"/>
 
       <p>
 
       <table bgcolor="#eeeeee" cellpadding="6">
          <tr>
             <td nowrap>
                
 
                   <asp:Label id="lblEnabled" 
                        runat="server"/><br>
                   <asp:Label id="lblCurrentIndex" 
                        runat="server"/><br>
                   <asp:Label id="lblPageCount" 
                        runat="server"/><br>
                   <asp:Label id="lblPageSize" 
                        runat="server"/><br>
 
                
             </td>
          </tr>
       </table>
 
    </form>
 
 </body>
 </html>
   

<%@ Page Language="JScript" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
 <html>
 <script language="JScript" runat="server">
 
    function CreateDataSource() : ICollection 
    {
      var dt : DataTable = new DataTable();
      var dr : DataRow;
 
      dt.Columns.Add(new DataColumn("IntegerValue", Int32));
      dt.Columns.Add(new DataColumn("StringValue", System.String));
      dt.Columns.Add(new DataColumn("CurrencyValue", double));
 
      for (var i : int = 0; i < 100; i++) 
      {
         dr = dt.NewRow();
 
         dr[0] = i;
         dr[1] = "Item " + i.ToString();
         dr[2] = 1.23 * (i+1); 
         dt.Rows.Add(dr);
      }
 
      var dv : DataView = new DataView(dt);
      return dv;
    }
 
    function Page_Load(sender, e : EventArgs) 
    {
       if (chk1.Checked)
          MyDataGrid.PagerStyle.Mode = PagerMode.NumericPages;
       else 
          MyDataGrid.PagerStyle.Mode = PagerMode.NextPrev;
 
       BindGrid();
    }
 
    function MyDataGrid_Page(sender, e : DataGridPageChangedEventArgs) 
    {
       MyDataGrid.CurrentPageIndex = e.NewPageIndex;
       BindGrid();
    }
 
    function BindGrid() 
    {
       MyDataGrid.DataSource = CreateDataSource();
       MyDataGrid.DataBind();
       ShowStats();
    }
 
    function ShowStats() 
    {
       lblEnabled.Text = "AllowPaging is " + MyDataGrid.AllowPaging;
       lblCurrentIndex.Text = "CurrentPageIndex is " + MyDataGrid.CurrentPageIndex;
       lblPageCount.Text = "PageCount is " + MyDataGrid.PageCount;
       lblPageSize.Text = "PageSize is " + MyDataGrid.PageSize;
    }
 
 
 </script>
 
 <body>
 
    <h3>DataGrid Paging Example</h3>
 
    <form runat=server>
 
       <asp:DataGrid id="MyDataGrid" runat="server"
            AllowPaging="True"
            PageSize="10"
            OnPageIndexChanged="MyDataGrid_Page"
            BorderColor="black"
            BorderWidth="1"
            GridLines="Both"
            CellPadding="3"
            CellSpacing="0"
            Font-Name="Verdana"
            Font-Size="8pt">

            <PagerStyle Mode="NumericPages"
                        HorizontalAlign="Right">
            </PagerStyle>


            <HeaderStyle BackColor="#aaaadd">
            </HeaderStyle>

            <AlternatingItemStyle BackColor="#eeeeee">
            </AlternatingItemStyle>

       </asp:DataGrid>
 
       <p>
 
       <asp:Checkbox id="chk1" runat="server"
            Text="Show numeric page navigation buttons"
            Font-Name="Verdana"
            Font-Size="8pt"
            AutoPostBack="true"/>
 
       <p>
 
       <table bgcolor="#eeeeee" cellpadding="6">
          <tr>
             <td nowrap>
                
 
                   <asp:Label id="lblEnabled" 
                        runat="server"/><br>
                   <asp:Label id="lblCurrentIndex" 
                        runat="server"/><br>
                   <asp:Label id="lblPageCount" 
                        runat="server"/><br>
                   <asp:Label id="lblPageSize" 
                        runat="server"/><br>
 
                
             </td>
          </tr>
       </table>
 
    </form>
 
 </body>
 </html>

Plattformen

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

DataGrid-Klasse
DataGrid-Member
System.Web.UI.WebControls-Namespace
DataGrid.AllowPaging-Eigenschaft