GridView.TopPagerRow Propriété

Définition

Obtient un objet GridViewRow qui représente la ligne du haut du pagineur dans un contrôle GridView.

public:
 virtual property System::Web::UI::WebControls::GridViewRow ^ TopPagerRow { System::Web::UI::WebControls::GridViewRow ^ get(); };
[System.ComponentModel.Browsable(false)]
public virtual System.Web.UI.WebControls.GridViewRow TopPagerRow { get; }
[<System.ComponentModel.Browsable(false)>]
member this.TopPagerRow : System.Web.UI.WebControls.GridViewRow
Public Overridable ReadOnly Property TopPagerRow As GridViewRow

Valeur de propriété

GridViewRow qui représente la ligne du haut du pagineur dans le contrôle.

Attributs

Exemples

L’exemple suivant montre comment utiliser la TopPagerRow propriété pour accéder à la ligne du pagineur supérieur dans un GridView contrôle. La TopPagerRow propriété est utilisée pour récupérer un DropDownList contrôle à partir de la ligne du pagineur.


<%@ 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">

  void PageDropDownList_SelectedIndexChanged(Object sender, EventArgs e)
  {

    // Retrieve the pager row.
    GridViewRow pagerRow = CustomersGridView.TopPagerRow;
   
    // Retrieve the PageDropDownList DropDownList from the pager row.
    DropDownList pageList = (DropDownList)pagerRow.Cells[0].FindControl("PageDropDownList");

    // Set the PageIndex property to display that page selected by the user.
    CustomersGridView.PageIndex = pageList.SelectedIndex;

  }

  void CustomersGridView_DataBound(Object sender, EventArgs e)
  {
    
    // Retrieve the PagerRow.
    GridViewRow pagerRow = CustomersGridView.TopPagerRow;
    
    // Retrieve the DropDownList and Label controls from the row.
    DropDownList pageList = (DropDownList)pagerRow.Cells[0].FindControl("PageDropDownList");
    Label pageLabel = (Label)pagerRow.Cells[0].FindControl("CurrentPageLabel");
        
    if(pageList != null)
    {
        
      // Create the values for the DropDownList control based on 
      // the  total number of pages required to display the data
      // source.
      for(int i=0; i<CustomersGridView.PageCount; i++)
      {
            
        // Create a ListItem object to represent a page.
        int pageNumber = i + 1;
        ListItem item = new ListItem(pageNumber.ToString());         
            
        // If the ListItem object matches the currently selected
        // page, flag the ListItem object as being selected. Because
        // the DropDownList control is recreated each time the pager
        // row gets created, this will persist the selected item in
        // the DropDownList control.   
        if(i==CustomersGridView.PageIndex)
        {
          item.Selected = true;
        }
            
        // Add the ListItem object to the Items collection of the 
        // DropDownList.
        pageList.Items.Add(item);
                
      }
        
    }
        
    if(pageLabel != null)
    {
        
      // Calculate the current page number.
      int currentPage = CustomersGridView.PageIndex + 1;     
        
      // Update the Label control with the current page information.
      pageLabel.Text = "Page " + currentPage.ToString() +
        " of " + CustomersGridView.PageCount.ToString();
        
    }    
    
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView TopPagerRow Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView TopPagerRow Example</h3>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource"   
        autogeneratecolumns="true"
        allowpaging="true"
        ondatabound="CustomersGridView_DataBound"  
        runat="server">
              
        <pagerstyle forecolor="Blue"
          backcolor="LightBlue"/>
          
        <pagersettings position="Top"/>
              
        <pagertemplate>
          
          <table width="100%">                    
            <tr>                        
              <td style="width:70%">
                          
                <asp:label id="MessageLabel"
                  forecolor="Blue"
                  text="Select a page:" 
                  runat="server"/>
                <asp:dropdownlist id="PageDropDownList"
                  autopostback="true"
                  onselectedindexchanged="PageDropDownList_SelectedIndexChanged" 
                  runat="server"/>
                      
              </td>   
                      
              <td style="width:70%" align="right">
                      
                <asp:label id="CurrentPageLabel"
                  forecolor="Blue"
                  runat="server"/>
                      
              </td>
                                            
            </tr>                    
          </table>
          
        </pagertemplate> 
          
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </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">

  Sub PageDropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
    
    ' Retrieve the pager row.
    Dim pagerRow As GridViewRow = CustomersGridView.TopPagerRow
    
    ' Retrieve the PageDropDownList DropDownList from the bottom pager row.
    Dim pageList As DropDownList = CType(pagerRow.Cells(0).FindControl("PageDropDownList"), DropDownList)
        
    ' Set the PageIndex property to display that page selected by the user.
    CustomersGridView.PageIndex = pageList.SelectedIndex
    
  End Sub
    
  Sub CustomersGridView_DataBound(ByVal sender As Object, ByVal e As EventArgs)
    
    ' Get the PagerRow.
    Dim pagerRow As GridViewRow = CustomersGridView.TopPagerRow
    
    ' Retrieve the DropDownList and Label controls from the row.
    Dim pageList As DropDownList = CType(pagerRow.Cells(0).FindControl("PageDropDownList"), DropDownList)
    Dim pageLabel As Label = CType(pagerRow.Cells(0).FindControl("CurrentPageLabel"), Label)
        
    If Not pageList Is Nothing Then
        
      ' Create the values for the DropDownList control based on 
      ' the  total number of pages required to display the data
      ' source.
      Dim i As Integer
            
      For i = 0 To CustomersGridView.PageCount - 1
            
        ' Create a ListItem object to represent a page.
        Dim pageNumber As Integer = i + 1
        Dim item As ListItem = New ListItem(pageNumber.ToString())
            
        ' If the ListItem object matches the currently selected
        ' page, flag the ListItem object as being selected. Because
        ' the DropDownList control is recreated each time the pager
        ' row gets created, this will persist the selected item in
        ' the DropDownList control.   
        If i = CustomersGridView.PageIndex Then
          
          item.Selected = True
                
        End If
            
        ' Add the ListItem object to the Items collection of the 
        ' DropDownList.
        pageList.Items.Add(item)
                
      Next i
        
    End If
        
    If Not pageLabel Is Nothing Then
        
      ' Calculate the current page number.
      Dim currentPage As Integer = CustomersGridView.PageIndex + 1
        
      ' Update the Label control with the current page information.
      pageLabel.Text = "Page " & currentPage.ToString() & _
          " of " & CustomersGridView.PageCount.ToString()
        
    End If
    
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView TopPagerRow Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView TopPagerRow Example</h3>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource"   
        autogeneratecolumns="true"
        allowpaging="true"
        ondatabound="CustomersGridView_DataBound"  
        runat="server">
              
        <pagerstyle forecolor="Blue"
          backcolor="LightBlue"/>
          
        <pagersettings position="Top"/>
              
        <pagertemplate>
          
          <table width="100%">                    
            <tr>                        
              <td style="width:70%">
                          
                <asp:label id="MessageLabel"
                  forecolor="Blue"
                  text="Select a page:" 
                  runat="server"/>
                <asp:dropdownlist id="PageDropDownList"
                  autopostback="true"
                  onselectedindexchanged="PageDropDownList_SelectedIndexChanged" 
                  runat="server"/>
                      
              </td>   
                      
              <td style="width:70%" align="right">
                      
                <asp:label id="CurrentPageLabel"
                  forecolor="Blue"
                  runat="server"/>
                      
              </td>
                                            
            </tr>                    
          </table>
          
        </pagertemplate> 
          
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

Remarques

Lorsque la pagination est activée (en affectant à truela propriété la AllowPaging valeur ), une ligne supplémentaire appelée ligne de pagineur s’affiche automatiquement dans le GridView contrôle. La ligne du pagineur contient des contrôles qui permettent à l’utilisateur d’accéder aux autres pages et peuvent être affichés en haut, en bas ou à la fois en haut et en bas du contrôle. Utilisez la TopPagerRow propriété pour accéder par programmation à l’objet GridViewRow qui représente la ligne de radiomessagerie supérieure dans un GridView contrôle.

Notes

La TopPagerRow propriété est disponible uniquement une fois que le GridView contrôle a créé la ligne de pagineur supérieure dans l’événement RowCreated .

Cette propriété est couramment utilisée lorsque vous devez manipuler par programmation la ligne du pagineur supérieur, par exemple lors de l’ajout de contenu personnalisé. Toute modification apportée à la TopPagerRow propriété doit être effectuée après le rendu du GridView contrôle ; sinon, le GridView contrôle remplacera les modifications.

S’applique à

Voir aussi