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Asp+语法介绍(六)----数据库篇发表日期：2000-8-21
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asp+ 给我们提供了一套数据表格和数据列表的控件。这些控件可以帮助我们定制我们UI(user interFace 用户界面)而不去考 虑一种数据库或者其他的数据库。例如：在下面的例子中，我们将要介绍一下<asp:datagrid runat=server>控件是怎么样通过 sql 语句给我们提供数据的 <%@ Import Namespace="System.Data" %> <%@ Import Namespace="System.Data.SQL" %> <html> <head> <link rel="stylesheet"href="intro.css"> </head> <script language="VB" runat=server> Sub SubmitBtn_Click(Sender As Object, E As EventArgs) Dim DS As DataSet Dim MyConnection As SQLConnection Dim MyCommand As SQLDataSetCommand '以下是数据库联结 MyConnection = New SQLConnection("server=localhost;uid=sa;pwd=;database=pubs") MyCommand = New SQLDataSetCommand("select * from Titles where type='" + Category.SelectedItem.Value + "'", myConnection) DS = new DataSet() MyCommand.FillDataSet(DS, "Titles") MyList.DataSource = DS.Tables("Titles").DefaultView MyList.DataBind() End Sub </script> <body> <center> <form action="intro75.aspx" method="post" runat="server"> <asp:adrotator AdvertisementFile="ads.xml" BorderColor="black" BorderWidth=1 runat="server"/> <h3> Name: <asp:textbox id="Name" runat="server"/> Category: <asp:dropdownlist id="Category" runat=server> <asp:listitem >psychology</asp:listitem> <asp:listitem >business</asp:listitem> <asp:listitem >popular_comp</asp:listitem> </asp:dropdownlist> <asp:button type=submit text="Lookup" OnClick="SubmitBtn_Click" runat="server"/> <p> <ASP:DataGrid id="MyList" HeaderStyle-BackColor="#aaaadd" BackColor="#ccccff" runat="server"/> </form> </center> </body> </html> 这个例子的运行示例在 http://tutorial.superexpert.com/quickstart/aspplus/samples/webforms/intro/intro75.aspx 数据表格(data grid)控件 <asp:datagrid runat=server> 给我们提供了一种非常简单的方法用传统的UI截面去显示数据查询的结果.Asp+ 的开发者现在还可以通过<asp:dataList runat=server> 来定制数据列表显示来定制信息 <%@ Import Namespace="System.Data" %> <%@ Import Namespace="System.Data.SQL" %> <html> <head> <link rel="stylesheet"href="intro.css"> </head> <script language="VB" runat=server> Sub SubmitBtn_Click(Sender As Object, E As EventArgs) Dim DS As DataSet Dim MyConnection As SQLConnection Dim MyCommand As SQLDataSetCommand MyConnection = New SQLConnection("server=localhost;uid=sa;pwd=;database=pubs") MyCommand = New SQLDataSetCommand("select * from Titles where type='" + Category.SelectedItem.Value + "'", myConnection) DS = new DataSet() MyCommand.FillDataSet(DS, "Titles") MyList.DataSource = DS.Tables("Titles").DefaultView MyList.DataBind() End Sub </script> <body> <center> <form action="intro8.aspx" method="post" runat="server"> <asp:adrotator AdvertisementFile="ads.xml" BorderColor="black" BorderWidth=1 runat="server"/> <h3> Name: <asp:textbox id="Name" runat="server"/> Category: <asp:dropdownlist id="Category" runat=server> <asp:listitem >psychology</asp:listitem> <asp:listitem >business</asp:listitem> <asp:listitem >popular_comp</asp:listitem> </asp:dropdownlist> <asp:button type=submit text="Lookup" OnClick="SubmitBtn_Click" runat="server"/> <p> <asp:datalist id="MyList" repeatcolumns="2" borderwidth="0" runat="server"> <template name="itemtemplate"> <table> <tr> <td> <img src='<%# DataBinder.Eval (Container.DataItem, "title_id", "/quickstart/aspplus/images/title-{0}.gif") %>'> </td> <td width=250 valign=top> <b><%# DataBinder.Eval(Container.DataItem, "title") %></b> <br><br> Price: <%# DataBinder.Eval(Container.DataItem, "price", "${0}") %> </td> </tr> </table> </template> </asp:datalist> </form> </center> </body> </html> 这个程序的运行例子在 http://tutorial.superexpert.com/quickstart/aspplus/samples/webforms/intro/intro8.aspx |
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