ASP.NET - Repeater 控件
Repeater 控件用于显示重复的项目列表,这些项目被限制在该控件。
实例
Repeater 控件
<%@ 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 border="1" width="100%">
<tr>
<th>Title</th>
<th>Artist</th>
<th>Company</th>
<th>Price</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td><%#Container.DataItem("title")%> </td>
<td><%#Container.DataItem("artist")%> </td>
<td><%#Container.DataItem("company")%> </td>
<td><%#Container.DataItem("price")%> </td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
</form>
</body>
</html>
带有 <AlternatingItemTemplate> 的 Repeater 控件
<%@ 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 border="1" width="100%">
<tr>
<th>Title</th>
<th>Artist</th>
<th>Company</th>
<th>Price</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td><%#Container.DataItem("title")%> </td>
<td><%#Container.DataItem("artist")%> </td>
<td><%#Container.DataItem("company")%> </td>
<td><%#Container.DataItem("price")%> </td>
</tr>
</ItemTemplate>
<AlternatingItemTemplate>
<tr bgcolor="#e8e8e8">
<td><%#Container.DataItem("title")%> </td>
<td><%#Container.DataItem("artist")%> </td>
<td><%#Container.DataItem("company")%> </td>
<td><%#Container.DataItem("price")%> </td>
</tr>
</AlternatingItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
</form>
</body>
</html>
带有 <SeparatorTemplate> 的 Repeater 控件
<%@ 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 border="0" width="100%">
<tr>
<th align="left">Title</th>
<th align="left">Artist</th>
<th align="left">Company</th>
<th align="left">Price</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td><%#Container.DataItem("title")%> </td>
<td><%#Container.DataItem("artist")%> </td>
<td><%#Container.DataItem("company")%> </td>
<td><%#Container.DataItem("price")%> </td>
</tr>
</ItemTemplate>
<SeparatorTemplate>
<tr>
<td colspan="6"><hr /></td>
</tr>
</SeparatorTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
</form>
</body>
</html>
把 DataSet 绑定到 Repeater 控件
Repeater 控件用于显示重复的项目列表,这些项目被限制在该控件。Repeater 控件可被绑定到数据库表、XML 文件或者其他项目列表。这里,我们将展示如何把 XML 文件绑定到一个 Repeater 控件。
我们将在例子中使用下面的 XML 文件("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>
首先,导入 "System.Data" 命名空间。我们需要此命名空间与 DataSet 对象一同工作。在 .aspx 页面的顶部包含下面这条指令:
- <%@ Import Namespace="System.Data" %>
接下来,为这个 XML 文件创建一个 DataSet,并把此 XML 文件在页面首次加载时载入 DataSet:
- <script runat="server">
- sub Page_Load
- if Not Page.IsPostBack then
dim mycdcatalog=New DataSet
mycdcatalog.ReadXml(MapPath("cdcatalog.xml"))
- end if
- end sub
然后我们在 .aspx 页面中创建一个 Repeater 控件。<HeaderTemplate> 元素中的内容在输出中仅出现一次,而 <ItemTemplate> 元素的内容会对应 DataSet 中的 "record" 重复出现,最后,<FooterTemplate> 的内容在输出中仅出现一次:
- <html>
- <body>
- <form runat="server">
<asp:Repeater id="cdcatalog" runat="server">
<HeaderTemplate>
...
</HeaderTemplate>
<ItemTemplate>
...
</ItemTemplate>
<FooterTemplate>
...
</FooterTemplate>
</asp:Repeater>
- </form>
- </body>
- </html>
然后我们添加可创建 DataSet 的脚本,并把这个 mycdcatalog DataSet 绑定到 Repeater 控件。我们同样用 HTML 标签来填充这个 Repeater 控件,并通过 <%#Container.DataItem("fieldname")%> 方法把数据项目绑定到 <ItemTemplate> 部分内的单元格:
- <%@ 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 border="1" width="100%">
- <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>
使用 <AlternatingItemTemplate>
您可以在 <ItemTemplate> 元素后添加 <AlternatingItemTemplate> 元素,这样就可以描述交替行的外观了。在下面的例子中,该表格中每隔一行就会显示为浅灰色的背景:
- <%@ 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 border="1" width="100%">
- <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>
使用 <SeparatorTemplate>
<SeparatorTemplate> 元素能够用于描述每个记录之间的分隔符。下面的例子在每个表格行之间插入了一条水平线:
- <%@ 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 border="0" width="100%">
- <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>