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用DataList控件开发一个简单的留言本程序

 2001-04-03 10:58:36 来源:WEB开发网   
核心提示:<%@ Import Namespace="System.Data" %><%@ Import Namespace="System.Data.ADO" %><Html><Body BgColor="White">
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.ADO" %>
<Html>
<Body BgColor="White">
<H3>DataList 控制元件<HR></H3>
<div id=Message runat=server></div>
<Form runat="server">
<table cellspacing=0 cellpadding=0 width="776" border=0>
 <tr>
  <td width="2%"><img height=20 src=http://www.cncms.com/"images/up.gif" width=16></td>
  <td width="98%" bgcolor=#333333 align="center"><font face=宋体 color=#ffffcc><b>留言本</b></font></td>
 </tr>
</table>
<asp:DataList id="DataList1" runat="server"
   Border="1" BorderColor="Black"
   CellPadding="2" CellSpacing="0"
   HeaderStyle-BackColor="#888888"
   ItemStyle-BackColor="#eeeeee"
   SelectedItemStyle-BackColor="#ffffff"
   HeaderTemplate-ColSpan="3"
   OnItemCommand="DataList_ItemCommand"
   Width="776">

<!--编号模版-->
<template name="HeaderTemplate" >
 <asp:LinkButton id="Tosay" runat="server" Text="我要发言" ForeColor="#ffffff"/>
 <a href="temp.aspx"><font color="#ffffff">刷新界面</font></a>
 <asp:LinkButton id="Mange" runat="server" Text="管理留言" ForeColor="#ffffff"/>
</template>


<!--内容模版-->
<template name="ItemTemplate">
<%# Container.DataItem("book_id")%>
<%# Container.DataItem("content")%>
<asp:LinkButton id="Detail" runat="server" Text="查看详细内容" ForeColor="#333333"/>
</template>

<!--查看留言模版-->
<template name="SelectedItemTemplate">
 编号: <%# Container.DataItem("book_id")%><BR>
 发言人: <%# Container.DataItem("username")%><BR>
 时间: <%# Container.DataItem("post_time")%><BR>
 内容: <%# Container.DataItem("content")%><BR>
<div align="right"><asp:LinkButton id="Title" runat="server" Text="关闭" ForeColor="#333333"/></div>
</template>

</asp:DataList>
<table id="foot" cellspacing=0 cellpadding=0 width="776" border=0 runat="server" visible="false">
 <tr>
  <td bgcolor=#000000>
   <table cellspacing=1 cellpadding=3 width="100%" border=0>
    <tr bgcolor=#ffffff>
     <td>大名:<Input Type="Text" id="Username" Size=20 runat="server" /><br>
留言:<Input Type="Text" id="Content" Size=20 runat="server" />
<asp:LinkButton id="save" runat="server" Text="保存" OnClick="LinkButton1_Click" AutoPostBack/><br>
<asp:LinkButton id="close" runat="server" Text="关闭" OnClick="LinkButton2_Click"/></td>
    </tr>
   </table>
  </td>
 </tr>
</table>

<table cellspacing=0 cellpadding=0 width="776" border=0>
 <tr>
  <td width="98%" bgcolor=#333333 align="center"><font face=宋体 color=#ffffcc><b>    留言本</b></font></td>
  <td width="2%"><img height=20 src=http://www.cncms.com/"images/dn.gif" width=16></td>
 </tr>
</table>

      

      
</Form>
<hr>

<asp:Label id="Label1" runat="server" />
</Body>
</Html>

<script Language="VB" runat="server">

  Sub Page_Load(sender As Object, e As EventArgs)
   DataList1.DataSource = CreateDataView( "data.mdb", "guestbook" )
   DataList1.DataBind()
  End Sub

Function CreateDataView( Db As String, Table As String ) As DataView
       Dim PRovider, ConnStr, SQL As String
       Provider = "Microsoft.Jet.OLEDB.4.0;"
       ConnStr = "Provider=" & Provider & _
       "Data Source=" & Server.MapPath( Db )
       Dim Cmd As ADODataSetCommand
       Cmd = New ADODataSetCommand( "Select * from " & Table &" Order By post_time DESC", ConnStr )
       Dim ds As DataSet = new DataSet()
       Cmd.FillDataSet(ds, Table)
       CreateDataView = new DataView(ds.Tables(Table))
End Function

  Sub DataList_ItemCommand(sender As Object, e As DataListCommandEventArgs)
   select case e.CommandSource.Text
   case "我要发言"
   foot.Visible = true
   
   case "管理留言"

   case "查看详细内容"
    DataList1.SelectedIndex = e.Item.ItemIndex '查看留言模版被选中
   case "关闭" 
    DataList1.SelectedIndex = -1
   end select
   DataList1.DataSource = CreateDataView( "data.mdb", "guestbook" )
   DataList1.DataBind()
  End Sub
  Sub LinkButton2_Click(sender As Object, e As EventArgs)
      foot.Visible = false
  End Sub  

  Sub LinkButton1_Click(sender As Object, e As EventArgs)
    Dim ConnStr, SQL As String
        SQL = "Insert Into GuestBook (userName,post_time,content) Values ('"& Username.Value &"','"& DateTime.Now &"','"& Content.Value &"')"
        ConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
             "Data Source=" & Server.MapPath( "data.mdb" )
        Dim Cmd As ADOCommand = New ADOCommand( SQL, ConnStr )
        Cmd.ActiveConnection.Open()
        Cmd.Execute()  
        Message.InnerHtml = "<B>留言成功!</B>"
      foot.Visible = false
      Page.Navigate("temp.aspx")
  End Sub
</script>

研究了好长时间,可最后那句Page.Navigate("temp.aspx")还是达不到及时刷新的效果:(,看精华区有篇C#编的是在PAGE_LOAD事件里面接收REQUEST.FORM对象后INSERT立即更新DATESET,不知道我这个怎么弄好...
  

Tags:DataList 控件 开发

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