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DetailsView.DataItemIndex Propriété

Définition

Obtient l'index de l'élément qui est affiché dans un contrôle DetailsView provenant de la source de données sous-jacente.

public:
 virtual property int DataItemIndex { int get(); };
[System.ComponentModel.Browsable(false)]
public virtual int DataItemIndex { get; }
[<System.ComponentModel.Browsable(false)>]
member this.DataItemIndex : int
Public Overridable ReadOnly Property DataItemIndex As Integer

Valeur de propriété

Int32

L'index de base zéro de l'élément de données qui est affiché dans un contrôle DetailsView provenant de la source de données sous-jacente.

Attributs

Exemples

L’exemple de code suivant montre comment utiliser la DataItemIndex propriété pour déterminer l’index de l’élément actuel dans la source de données. Cette valeur est utilisée pour afficher le numéro de page actif dans un Label contrôle contenu dans une ligne de pagineur personnalisée.

<%@ 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">

    protected void CustomerDetailView_DataBound(object sender, EventArgs e)
    {

      // Get the pager row.
      DetailsViewRow pagerRow = CustomerDetailView.BottomPagerRow;

      // Get the Label controls that display the current page information 
      // from the pager row.
      Label pageNum = (Label)pagerRow.Cells[0].FindControl("PageNumberLabel");
      Label totalNum = (Label)pagerRow.Cells[0].FindControl("TotalPagesLabel");

      if ((pageNum != null) && (totalNum != null))
      {
          // Update the Label controls with the current page values.
          int page = CustomerDetailView.DataItemIndex + 1;
          int count = CustomerDetailView.DataItemCount;

          pageNum.Text = page.ToString();
          totalNum.Text = count.ToString();
      }
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

  <head runat="server">
    <title>DetailsView PagerTemplate Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView PagerTemplate Example</h3>
                
        <!-- Notice that the LinkButton controls in the pager   -->
        <!-- template have their CommandName properties set.    -->
        <!-- The DetailsView control automatically recognizes   -->
        <!-- certain command names and performs the appropriate -->
        <!-- operation. In this example, the CommandName        -->
        <!-- properties are set "Page" and the CommandArgument  -->
        <!-- properties are set to "Next" and "Prev", which     -->
        <!-- causes the DetailsView control to navigate to the  -->
        <!-- next and previous record, respectively.            -->        
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          autogeneraterows="true" 
          allowpaging="true"
        
          runat="server" OnDataBound="CustomerDetailView_DataBound">
               
          <headerstyle backcolor="Navy"
            forecolor="White"/>
            
          <pagerstyle VerticalAlign="Bottom" />
            
          <pagertemplate>
          
            <table width="100%">
              <tr>
                <td>
                  <asp:LinkButton id="PreviousButton"
                    text="<"
                    CommandName="Page"
                    CommandArgument="Prev"
                    runat="Server"/>
                  <asp:LinkButton id="NextButton"
                    text=">"
                    CommandName="Page"
                    CommandArgument="Next"
                    runat="Server"/> 
                </td>
                <td align="right">                
                  Page <asp:Label id="PageNumberLabel" runat="server" /> 
                  of <asp:Label id="TotalPagesLabel" runat="server" />                
                </td>
              </tr>
            </table>          
          </pagertemplate>   
                    
        </asp:detailsview>
        
        <!-- 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="DetailsViewSource" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </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">

    Protected Sub CustomerDetailView_DataBound(ByVal sender As Object, ByVal e As EventArgs)
        ' Get the pager row.
        Dim pagerRow As DetailsViewRow = CustomerDetailView.BottomPagerRow

        ' Get the Label controls that display the current page information 
        ' from the pager row.
        Dim pageNum As Label = CType(pagerRow.Cells(0).FindControl("PageNumberLabel"), Label)
        Dim totalNum As Label = CType(pagerRow.Cells(0).FindControl("TotalPagesLabel"), Label)
        
        If (pageNum IsNot Nothing) And (totalNum IsNot Nothing) Then
            ' Update the Label controls with the current page values.
            Dim page As Integer = CustomerDetailView.DataItemIndex + 1
            Dim count As Integer = CustomerDetailView.DataItemCount

            pageNum.Text = page.ToString()
            totalNum.Text = count.ToString()
        End If
    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

  <head runat="server">
    <title>DetailsView PagerTemplate Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView PagerTemplate Example</h3>
                
        <!-- Notice that the LinkButton controls in the pager   -->
        <!-- template have their CommandName properties set.    -->
        <!-- The DetailsView control automatically recognizes   -->
        <!-- certain command names and performs the appropriate -->
        <!-- operation. In this example, the CommandName        -->
        <!-- properties are set "Page" and the CommandArgument  -->
        <!-- properties are set to "Next" and "Prev", which     -->
        <!-- causes the DetailsView control to navigate to the  -->
        <!-- next and previous record, respectively.            -->        
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          autogeneraterows="true" 
          allowpaging="true"
        
          runat="server" OnDataBound="CustomerDetailView_DataBound">
               
          <headerstyle backcolor="Navy"
            forecolor="White"/>
            
          <pagerstyle VerticalAlign="Bottom" />
            
          <pagertemplate>
          
            <table width="100%">
              <tr>
                <td>
                  <asp:LinkButton id="PreviousButton"
                    text="<"
                    CommandName="Page"
                    CommandArgument="Prev"
                    runat="Server"/>
                  <asp:LinkButton id="NextButton"
                    text=">"
                    CommandName="Page"
                    CommandArgument="Next"
                    runat="Server"/> 
                </td>
                <td align="right">                
                  Page <asp:Label id="PageNumberLabel" runat="server" /> 
                  of <asp:Label id="TotalPagesLabel" runat="server" />                
                </td>
              </tr>
            </table>          
          </pagertemplate>   
                    
        </asp:detailsview>
        
        <!-- 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="DetailsViewSource" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country]) VALUES (@CustomerID, @CompanyName, @Address, @City, @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>

Remarques

Lorsque la fonctionnalité de pagination est activée (en définissant la AllowPaging propriété truesur ), utilisez la DataItemIndex propriété pour déterminer l’index de l’enregistrement actuellement affiché. Vous pouvez également utiliser cette propriété pour modifier par programmation l’enregistrement affiché.

Notes

Lorsque la fonctionnalité de pagination est activée, vous pouvez également utiliser cette propriété pour déterminer le numéro de page de l’enregistrement affiché ; toutefois, sachez que cette propriété est de base zéro.

Pour déterminer le nombre total d’éléments dans la source de données, utilisez la DataItemCount propriété.

S’applique à

Voir aussi