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ListView.GroupTemplate Proprietà

Definizione

Ottiene o imposta il contenuto definito dall'utente per il contenitore di gruppi in un controllo ListView.

public:
 virtual property System::Web::UI::ITemplate ^ GroupTemplate { System::Web::UI::ITemplate ^ get(); void set(System::Web::UI::ITemplate ^ value); };
[System.ComponentModel.Browsable(false)]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
[System.Web.UI.TemplateContainer(typeof(System.Web.UI.WebControls.ListViewItem))]
public virtual System.Web.UI.ITemplate GroupTemplate { get; set; }
[<System.ComponentModel.Browsable(false)>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
[<System.Web.UI.TemplateContainer(typeof(System.Web.UI.WebControls.ListViewItem))>]
member this.GroupTemplate : System.Web.UI.ITemplate with get, set
Public Overridable Property GroupTemplate As ITemplate

Valore della proprietà

Oggetto che include il contenuto personalizzato del contenitore di gruppi in un controllo ListView. Il valore predefinito è null, che indica che la proprietà non è impostata.

Attributi

Esempio

Nell'esempio seguente viene illustrato come creare un layout riquadri nel ListView controllo usando la GroupTemplate proprietà .

<%@ Page language="C#" %>
    
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>ListView Tiled Layout Example</title>
    <style type="text/css">        
        .header
        {
          background-color:#B0C4DE;
          border-top:solid 1px #9dbbcc;
          border-bottom:solid 1px #9dbbcc;
        }
        .separator { border-right: 1px solid #ccc; }
    </style>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>ListView Tiled Layout Example</h3>
      
      <asp:ListView ID="ProductsListView" 
        DataSourceID="ProductsDataSource" 
        GroupItemCount="2"
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" width="640px" runat="server" id="tblProducts">
            <tr runat="server" class="header">
              <th runat="server" colspan="3">PRODUCTS LIST</th>
            </tr>
            <tr runat="server" id="groupPlaceholder" />
          </table>
        </LayoutTemplate>
        <GroupTemplate>
          <tr runat="server" id="ProductsRow">
            <td runat="server" id="itemPlaceholder" />
          </tr>
        </GroupTemplate>
        <GroupSeparatorTemplate>
          <tr runat="server">
            <td colspan="3"><hr /></td>
          </tr>
        </GroupSeparatorTemplate>
        <ItemTemplate>
          <td align="center" style="width:300px" runat="server">
            <asp:HyperLink ID="ProductLink" runat="server" 
               Text='<%# Eval("Name") %>' 
             NavigateUrl='<%# "ProductDetails.aspx?productID=" + Eval("ProductID") %>' /><br />
            <asp:Image ID="ProductImage" runat="server"
               ImageUrl='<%# "~/images/thumbnails/" + Eval("ThumbnailPhotoFileName") %>' /><br />
            <b>Price:</b>
            <asp:Label ID="PriceLabel" runat="server" Text='<%# Eval("ListPrice", "{0:c}")%>' /><br />
          </td>
        </ItemTemplate>
        <ItemSeparatorTemplate>
          <td class="separator" runat="server">&nbsp;</td>
        </ItemSeparatorTemplate>
      </asp:ListView>
      <br />

      <asp:DataPager runat="server" ID="ProductsDataPager" 
        PagedControlID="ProductsListView">
        <Fields>
          <asp:NextPreviousPagerField ButtonType="Button"
            ShowFirstPageButton="true"
            ShowNextPageButton="false" 
            ShowPreviousPageButton="false" />
          <asp:NumericPagerField ButtonCount="10" />
          <asp:NextPreviousPagerField ButtonType="Button"
            ShowLastPageButton="true"
            ShowNextPageButton="false" 
            ShowPreviousPageButton="false" />
        </Fields>
      </asp:DataPager>

      <!-- 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="ProductsDataSource" runat="server" 
        ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
        SelectCommand="SELECT P.ProductID, P.Name, P.Color, P.ListPrice, 
          PF.ThumbnailPhotoFileName
          FROM Production.Product AS P 
          INNER JOIN Production.ProductProductPhoto AS PPF ON P.ProductID = PPF.ProductID 
          INNER JOIN Production.ProductPhoto AS PF ON PPF.ProductPhotoID = PF.ProductPhotoID">
      </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">
    
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head id="Head1" runat="server">
    <title>ListView Tiled Layout Example</title>
    <style type="text/css">        
        .header
        {
          background-color:#B0C4DE;
          border-top:solid 1px #9dbbcc;
          border-bottom:solid 1px #9dbbcc;
        }
        .separator { border-right: 1px solid #ccc; }
    </style>
  </head>
  <body>
    <form id="form1" runat="server">
        
      <h3>ListView Tiled Layout Example</h3>
      
      <asp:ListView ID="ProductsListView" 
        DataSourceID="ProductsDataSource" 
        GroupItemCount="2"
        runat="server">
        <LayoutTemplate>
          <table cellpadding="2" width="640px" runat="server" id="tblProducts">
            <tr runat="server" class="header">
              <th runat="server" colspan="3">PRODUCTS LIST</th>
            </tr>
            <tr runat="server" id="groupPlaceholder" />
          </table>
        </LayoutTemplate>
        <GroupTemplate>
          <tr runat="server" id="ProductsRow">
            <td runat="server" id="itemPlaceholder" />
          </tr>
        </GroupTemplate>
        <GroupSeparatorTemplate>
          <tr runat="server">
            <td colspan="3"><hr /></td>
          </tr>
        </GroupSeparatorTemplate>
        <ItemTemplate>
          <td align="center" style="width:300px" runat="server">
            <asp:HyperLink ID="ProductLink" runat="server" 
               Text='<%# Eval("Name") %>' 
             NavigateUrl='<%# "ProductDetails.aspx?productID=" & Eval("ProductID") %>' /><br />
            <asp:Image ID="ProductImage" runat="server"
               ImageUrl='<%# "~/images/thumbnails/" & Eval("ThumbnailPhotoFileName") %>' /><br />
            <b>Price:</b>
            <asp:Label ID="PriceLabel" runat="server" Text='<%# Eval("ListPrice", "{0:c}")%>' /><br />
          </td>
        </ItemTemplate>
        <ItemSeparatorTemplate>
          <td class="separator" runat="server">&nbsp;</td>
        </ItemSeparatorTemplate>
      </asp:ListView>
      <br />

      <asp:DataPager runat="server" ID="ProductsDataPager" 
        PagedControlID="ProductsListView">
        <Fields>
          <asp:NextPreviousPagerField ButtonType="Button"
            ShowFirstPageButton="true"
            ShowNextPageButton="false" 
            ShowPreviousPageButton="false" />
          <asp:NumericPagerField ButtonCount="10" />
          <asp:NextPreviousPagerField ButtonType="Button"
            ShowLastPageButton="true"
            ShowNextPageButton="false" 
            ShowPreviousPageButton="false" />
        </Fields>
      </asp:DataPager>

      <!-- 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="ProductsDataSource" runat="server" 
        ConnectionString="<%$ ConnectionStrings:AdventureWorks_DataConnectionString %>"
        SelectCommand="SELECT P.ProductID, P.Name, P.Color, P.ListPrice, 
          PF.ThumbnailPhotoFileName
          FROM Production.Product AS P 
          INNER JOIN Production.ProductProductPhoto AS PPF ON P.ProductID = PPF.ProductID 
          INNER JOIN Production.ProductPhoto AS PF ON PPF.ProductPhotoID = PF.ProductPhotoID">
      </asp:SqlDataSource>
      
    </form>
  </body>
</html>

Commenti

Utilizzare la GroupTemplate proprietà per creare un layout riquadri nel ListView controllo. In un layout di tabella riquadri, gli elementi vengono ripetuti orizzontalmente in una riga. Il numero di volte in cui viene ripetuto un elemento viene specificato dalla GroupItemCount proprietà .

Per specificare un modello dichiarativo per il contenitore di gruppo, aggiungere un GroupTemplate elemento all'interno del ListView controllo. È quindi possibile aggiungere il contenuto del modello all'elemento GroupTemplate .

La GroupTemplate proprietà deve includere un segnaposto per l'elemento di dati, ad esempio una cella di tabella (td), divo span un elemento . Questo segnaposto deve avere l'attributo runat impostato su "server" e l'attributo ID impostato sul valore della ItemPlaceholderID proprietà. In fase di esecuzione, il ListView controllo sostituisce il segnaposto con il contenuto definito per ogni elemento nei ItemTemplate modelli e AlternatingItemTemplate .

Si applica a

Vedi anche