为何表格顶部多出一个空白行
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<asp:scriptmanager ID="sm" runat ="server" >
<Services>
<asp:servicereference Path ="AjaxService.asmx" />
</Services>
</asp:scriptmanager>
<table border ="0">
<tr>
<td>
<asp:updatepanel id="up" runat="server" >
<contenttemplate>
<asp:gridview ID="gv" runat ="server" AutoGenerateColumns ="false" Width ="100%">
<columns>
<asp:templatefield>
<itemtemplate>
<table>
<tr>
<td>
作者：<a href ='mailto:<%#Eval("Email") %>'><%#Eval("Email") %></a>于[<%#Eval("Ip") %>]、[<%#Eval("CreateDate") %>]留言
</td>
</tr>
<tr ><td colspan ="2"><hr style ="border :1px solid #006CC3; width:1000px;" /></td></tr>
<tr><td><%#Eval("Title") %></td></tr>
<tr><td><%#Eval("Message")%></td></tr>
<tr><td align ="right" ><a href ="#Message">我要留言:</a> <a href ='reply.aspx?MessageId=<%#Eval("Id")%>' >我要回复</a> <asp:hyperlink ID="hl" runat ="server" NavigateUrl ="#">展开</asp:hyperlink><asp:panel ID="nReply" runat ="server" />
<ajaxToolkit:DynamicPopulateExtender id="DPE" runat ="server" TargetControlID ="nReply" ClearContentsDuringUpdate ="true" UpdatingCssClass ="PopulatePanel" ScriptPath ="AjaxService.asmx" ServiceMethod ="GetReplyByMessage" ContextKey ='<%#Eval("Id")%>' PopulateTriggerControlID ="hl"/>
</td></tr>
</table>
</itemtemplate>
</asp:templatefield>
</columns>
</asp:gridview>
</contenttemplate>
</asp:updatepanel>
</td>
</tr>
</table>
</form>
</body>
</html>
为何表格首行出现一空行
--------------------编程问答-------------------- 是header，设置一下，如：
<asp:gridview ID="gv" runat ="server" AutoGenerateColumns ="false" Width ="100%"
ShowHeader="False"> --------------------编程问答--------------------
LZ的看看、
--------------------编程问答--------------------
boay里面这样设置：<body style=" margin-top:0px;"> 距离上边框0 试试
--------------------编程问答--------------------
你这明显是多了列名嘛。lz那样就可以了
补充：.NET技术 , ASP.NET
