综合这几天所学到的东西，写了个小东西，算是个成果吧（注意：该例子中用到的数据库是AccessXP里的Northwind.mdb)
<%@ Import namespace="System.Data"%>
<%@ Import namespace="System.Data.OleDb"%>
<HTML>
<body>
<form runat="server">
<asp:dropdownlist id="mydls" OnSelectedIndexChanged="subListChange" AutoPostBack="True" Runat="server"></asp:dropdownlist><asp:datagrid id="mydg" runat="server" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px"
BackColor="White" CellPadding="4">
<FooterStyle ForeColor="#003399" BackColor="#99CCCC"></FooterStyle>
<SelectedItemStyle Font-Bold="True" ForeColor="#CCFF99" BackColor="#009999"></SelectedItemStyle>
<ItemStyle ForeColor="#003399" BackColor="White"></ItemStyle>
<HeaderStyle Font-Bold="True" ForeColor="#CCCCFF" BackColor="#003399"></HeaderStyle>
<PagerStyle HorizontalAlign="Left" ForeColor="#003399" BackColor="#99CCCC" Mode="NumericPages"></PagerStyle>
</asp:datagrid>
<br>
<asp:button id="mybt" onclick="mybt_click" Runat="server" BorderStyle="Ridge" ForeColor="LightBlue"
Text="Show All"></asp:button>
<asp:DataGrid ID="mydg2" Runat="server" BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px"
BackColor="White" CellPadding="3" Visible="False" GridLines="Horizontal">
<FooterStyle ForeColor="#4A3C8C" BackColor="#B5C7DE"></FooterStyle>
<SelectedItemStyle Font-Bold="True" ForeColor="#F7F7F7" BackColor="#738A9C"></SelectedItemStyle>
<AlternatingItemStyle BackColor="#F7F7F7"></AlternatingItemStyle>
<ItemStyle ForeColor="#4A3C8C" BackColor="#E7E7FF"></ItemStyle>
<HeaderStyle Font-Bold="True" ForeColor="#F7F7F7" BackColor="#4A3C8C"></HeaderStyle>
<PagerStyle HorizontalAlign="Right" ForeColor="#4A3C8C" BackColor="#E7E7FF" Mode="NumericPages"></PagerStyle>
</asp:DataGrid></form>
<script language="vb" runat="server">
sub page_load(source as object,e as eventargs)
if not ispostback then
dim strConnection as string
dim dbName as string
dbName=server.mappath("db/Northwind.mdb")
strConnection="Provider=Microsoft.JET.OleDb.4.0;Data Source="&dbName
dim myConnection as OleDbConnection
myConnection=new OleDbConnection(strConnection)
dim strSQL as string
strSQL="SELECT * FROM 类别"
dim myCommand as OleDbCommand
myCommand=new OleDbCommand(strSQL,myConnection)
myConnection.Open()
mydls.DataSource=myCommand.ExecuteReader()
mydls.DataTextField="类别名称"
mydls.DataValueField="类别名称"
mydls.DataBind()
myConnection.Close()
strSQL="SELECT * FROM 类别"
myConnection.Open()
myCommand.CommandText=strSQL
mydg2.DataSource=myCommand.ExecuteReader()
mydg2.DataBind()
myConnection.Close()
end if
end sub
sub subListChange(S as Object,e as EventArgs)
dim strConnection as string
dim dbName as string
dbName=server.mappath("db/Northwind.mdb")
strConnection="Provider=Microsoft.JET.OleDb.4.0;Data Source="&dbName
dim myConnection as OleDbConnection
myConnection=new OleDbConnection(strConnection)
dim strSQL as string
strSQL="SELECT * FROM 类别 WHERE 类别名称='"&mydls.SelectedItem.Value+"'"
dim myCommand as OleDbCommand
myCommand=new OleDbCommand(strSQL,myConnection)
myConnection.Open()
mydg.DataSource=myCommand.ExecuteReader()
mydg.DataBind()
myConnection.Close()
end sub
sub mybt_click(sender as object,e as eventargs)
if mydg2.Visible=false then
mydg2.Visible=true
mybt.Text="Hide All"
else
mydg2.Visible=false
mybt.Text="Show All"
end if
end sub
</script>
</body>
</HTML>