ASP.NET Repeater control

Author：Eve Cole Update Time：2024-12-31 12:48:02
ASP.NET Web Forms - Repeater control
 The ASP.NETRepeater control is the original data binding control. This section introduces the usage of the Repeater control in ASP.NET data binding operations.
 The Repeater control is used to display a repeating list of items bound to the control.
 Bind the DataSet to the Repeater control
 The Repeater control is used to display a repeating list of items bound to the control. Repeater controls can be bound to database tables, XML files, or other lists of items. Here, we will demonstrate how to bind an XML file to a Repeater control.
 In our example, we will use the following XML file ("cdcatalog.xml"):
 <?xml version="1.0" encoding="ISO-8859-1"?> <catalog> <cd> <title>Empire Burlesque</title> <artist>Bob Dylan</artist> <country>USA</country > <company>Columbia</company> <price>10.90</price> <year>1985</year> </cd> <cd> <title>Hide your heart</title> <artist>Bonnie Tyler</artist> <country>UK</country> <company>CBS Records</company> <price>9.90</price> <year>1988</year> </cd> <cd> <title>Greatest Hits </title> <artist>Dolly Parton</artist> <country>USA</country> <company>RCA</company> <price>9.90</price> <year>1982</year> </cd> <cd> <title>Still got the blues</title> <artist>Gary Moore</artist> <country>UK</country> <company>Virgin records</company> <price>10.20</price> <year >1990</year> </cd> <cd> <title>Eros</title> <artist>Eros Ramazzotti</artist> <country>EU</country> <company>BMG</company> <price>9.90</price> <year>1997</year> </cd> </catalog>
 View this XML file: cdcatalog.xml
 First, import the "System.Data" namespace. We need this namespace to work with DataSet objects. Include the following directive at the top of your .aspx page:
 <%@ Import Namespace="System.Data" %>
 Next, create a DataSet for the XML file and load the XML file into the DataSet when the page first loads:
 <script runat="server"> sub Page_Load if Not Page.IsPostBack then dim mycdcatalog=New DataSet mycdcatalog.ReadXml(MapPath("cdcatalog.xml")) end if end sub
 Then we create a Repeater control in the .aspx page. The content in the <HeaderTemplate> element is rendered first and appears only once in the output, while the content in the <ItemTemplate> element is repeated for each "record" in the DataSet. Finally, the content in the <FooterTemplate> element is Appears only once in the output:
 <html> <body> <form runat="server"> <asp:Repeater id="cdcatalog" runat="server"> <HeaderTemplate> ... </HeaderTemplate> <ItemTemplate> ... </ItemTemplate> < FooterTemplate> ... </FooterTemplate> </asp:Repeater> </form> </body> </html>
 Then we add the script to create the DataSet and bind the mycdcatalog DataSet to the Repeater control. Then use HTML tags to populate the Repeater control, and bind data items to cells in the <ItemTemplate> area through <%#Container.DataItem("fieldname")%>:
 Example
 <%@ Import Namespace="System.Data" %> <script runat="server"> sub Page_Load if Not Page.IsPostBack then dim mycdcatalog=New DataSet mycdcatalog.ReadXml(MapPath("cdcatalog.xml")) cdcatalog.DataSource =mycdcatalog cdcatalog.DataBind() end if end sub </script> <html> <body> <form runat="server"> <asp:Repeater id="cdcatalog" runat="server"> <HeaderTemplate> <table> <tr> <th>Title</th> <th>Artist</th> <th>Country </th> <th>Company</th> <th>Price</th> <th>Year</th> </tr> </HeaderTemplate> <ItemTemplate> <tr> <td><%#Container.DataItem("title")%></td> <td><%#Container.DataItem("artist")%></td> <td><%#Container.DataItem( "country")%></td> <td><%#Container.DataItem("company")%></td> <td><%#Container.DataItem("price")%></td> <td><%#Container.DataItem("year")%></td> </tr> </ItemTemplate> <FooterTemplate > </table> </FooterTemplate> </asp:Repeater> </form> </body> </html>
 Tip: For knowledge about HTML tags, you can refer to the "HTML Reference Manual" of this site!
 Use <AlternatingItemTemplate>
 You can add an <AlternatingItemTemplate> element after an <ItemTemplate> element to describe the appearance of alternating rows in the output. In the example below, every other row of the table is displayed with a light gray background:
 Example
 <%@ Import Namespace="System.Data" %> <script runat="server"> sub Page_Load if Not Page.IsPostBack then dim mycdcatalog=New DataSet mycdcatalog.ReadXml(MapPath("cdcatalog.xml")) cdcatalog.DataSource =mycdcatalog cdcatalog.DataBind() end if end sub </script> <html> <body> <form runat="server"> <asp:Repeater id="cdcatalog" runat="server"> <HeaderTemplate> <table> <tr> <th>Title</th> <th>Artist</th> <th>Country </th> <th>Company</th> <th>Price</th> <th>Year</th> </tr> </HeaderTemplate> <ItemTemplate> <tr> <td><%#Container.DataItem("title")%></td> <td><%#Container.DataItem("artist")%></td> <td><%#Container.DataItem( "country")%></td> <td><%#Container.DataItem("company")%></td> <td><%#Container.DataItem("price")%></td> <td><%#Container.DataItem("year")%></td> </tr> </ItemTemplate> <AlternatingItemTemplate > <tr bgcolor="#e8e8e8"> <td><%#Container.DataItem("title")%></td> <td><%#Container.DataItem("artist")%></td> <td><%#Container.DataItem("country")%></td> <td><%#Container.DataItem( "company")%></td> <td><%#Container.DataItem("price")%></td> <td><%#Container.DataItem("year")%></td> </tr> </AlternatingItemTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:Repeater> </form> < /body> </html>
 Use <SeparatorTemplate>
 The <SeparatorTemplate> element is used to describe the separator between each record. In the example below, a horizontal line is inserted between each table row:
 Example
 <%@ Import Namespace="System.Data" %> <script runat="server"> sub Page_Load if Not Page.IsPostBack then dim mycdcatalog=New DataSet mycdcatalog.ReadXml(MapPath("cdcatalog.xml")) cdcatalog.DataSource =mycdcatalog cdcatalog.DataBind() end if end sub </script> <html> <body> <form runat="server"> <asp:Repeater id="cdcatalog" runat="server"> <HeaderTemplate> <table> <tr> <th>Title</th> <th>Artist</th> <th>Country </th> <th>Company</th> <th>Price</th> <th>Year</th> </tr> </HeaderTemplate> <ItemTemplate> <tr> <td><%#Container.DataItem("title")%></td> <td><%#Container.DataItem("artist")%></td> <td><%#Container.DataItem( "country")%></td> <td><%#Container.DataItem("company")%></td> <td><%#Container.DataItem("price")%></td> <td><%#Container.DataItem("year")%></td> </tr> </ItemTemplate> <SeparatorTemplate > <tr> <td colspan="6"><hr /></td> </tr> </SeparatorTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:Repeater> </form> </body> </html>
 The above is an introduction to the use of the ASP.NETRepeater control.