ASP.NET Web Forms User Controls（三）

tingningpower 2002-09-11 05:33:51

<%@ Control ClassName="Pagelet7CS" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>

<script language="C#" runat="server">

private String _category = "";

public String Category {

get {
return _category;
}
set {
_category = value;
SqlConnection myConnection = new SqlConnection("server=(local)\\NetSDK;database=pubs;Trusted_Connection=yes");
SqlDataAdapter myCommand = new SqlDataAdapter("select * from Titles where type='" + _category + "'", myConnection);

DataSet ds = new DataSet();
myCommand.Fill(ds, "Titles");

MyDataList.DataSource = ds.Tables["Titles"].DefaultView;
MyDataList.DataBind();
}
}

</script>

<span style="font: 12pt 宋体">类别：<%=Category%></span>

<ASP:DataList id="MyDataList" BorderWidth="0" RepeatColumns="2" runat="server">

<ItemTemplate>

<table cellpadding=10 style="font: 10.5pt 宋体">
<tr>
<td valign="top">
<img align="top" src='<%# DataBinder.Eval(Container.DataItem, "title_id", "/quickstart/aspplus/images/title-{0}.gif") %>' >
</td>
<td valign="top">
<b>书名：</b><%# DataBinder.Eval(Container.DataItem, "title") %><br>
<b>类别：</b><%# DataBinder.Eval(Container.DataItem, "type") %><br>
<b>出版商 ID：</b><%# DataBinder.Eval(Container.DataItem, "pub_id") %><br>
<b>价格：</b><%# DataBinder.Eval(Container.DataItem, "price", "$ {0}") %>
</td>
</tr>
</table>

</ItemTemplate>

</ASP:DataList>

应用：

<%@ Register TagPrefix="Acme" TagName="BookList" Src="pagelet7.ascx" %>

<html>

<script language="C#" runat="server">

void Page_Load(Object sender, EventArgs E) {

Page.Controls.Add(new HtmlGenericControl("hr"));

Control c1 = LoadControl("pagelet7.ascx");
((Pagelet7CS)c1).Category = "business";
Page.Controls.Add(c1);

Page.Controls.Add(new HtmlGenericControl("hr"));

Control c2 = LoadControl("pagelet7.ascx");
((Pagelet7CS)c2).Category = "trad_cook";
Page.Controls.Add(c2);

Page.Controls.Add(new HtmlGenericControl("hr"));

Control c3 = LoadControl("pagelet7.ascx");
((Pagelet7CS)c3).Category = "mod_cook";
Page.Controls.Add(c3);
}

</script>

<body style="font: 10.5pt 宋体">

<h3>以编程方式创建用户控件</h3>

</body>
</html>

...全文