页面只能有一个服务器端表单标记错误 [英] A page can have only one server side form tag error
本文介绍了页面只能有一个服务器端表单标记错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我是.Net编程的新手，所以请在下面帮助我。
先谢谢。
这是我的默认页面：
<％@ Page 语言 = C＃ MasterPageFile = 〜/ Manager.master AutoEventWireup = true CodeFile = MangerComposemessge.aspx.cs 继承 = MangerComposemessge 标题 = Untitled Page ％>
< asp：Content ID = < span class =code-keyword> Content1 ContentPlaceHolderID = head Runat = 服务器 >
< style type = text / css >
。 style1
{
width ： 100％;
border ： 6px solid #FFFFCC;
background-color ： #FFFFCC;
}
。 style2
{
width ： 228px;
}
< / style >
< / asp：Content >
< asp：内容 ID = Content2 runat = 服务器 ContentPlaceHolderID = ContentPlaceHolder1 >
< 表格 id = frm runat = server >
< p >
&
< / p >
< p >
&
< table < span class =code-attribute> class = style1 >
< tr >
< td class = style2 >
< < span class =code-leadattribute> asp：Label ID = Label4 runat = 服务器 文本 = TO > < < span class =code-leadattribute> / asp：Label >
< / td >
< ; td >
& nbsp;& NBSP;&安培; NBSP;&安培; NBSP;&安培; NBSP;&安培; NBSP;&安培; NBSP;
< asp：TextBox ID = TextBox1 runat = server 宽度 = 222px > < / asp：TextBox >
< / td >
< / tr >
< tr >
< td class = style2 >
< asp：标签 ID = Label5 runat = server < span class =code-attribute>文本 = 主题 > < / asp：标签 >
< / td >
< td >
< asp：TextBox ID = TextBox2 runat = server 宽度 = 223px > < / asp：TextBox >
< / td >
< / tr >
< tr >
< ; td class < span class =code-keyword> = style2 >
< asp：标签 ID = Label6 runat = server 文字 = 消息 > < / asp：标签 >
< / td >
< td >
& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& n BSP;&安培; NBSP;
< asp：TextBox ID = TextBox3 runat = 服务器 高度 = 97px TextMode < span class =code-keyword> = MultiLine
< span class =code-attribute>
宽度 = 315px > < / asp：TextBox >
< / td >
< / tr >
< tr >
< td class = style2 >
< asp：Label ID = Label7 runat = server 文字 = 附件 > < / asp：Label >
< / td >
< td >
& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;
< asp：TextBox ID = TextBox4 runat = 服务器 > < / asp：TextBox >
< asp：Button ID = Button2 runat = server 文本 = 浏览 / >
< / td >
< / tr > ;
< tr >
< td class = style2 >
& nbsp; < / td >
< td >
& nbsp; < / td >
< / tr >
< tr >
< ; td class < span class =code-keyword> = sty le2 >
& nbsp; < / td >
< td >
& nbsp ;&安培; NBSP;&安培; NBSP;&安培; NBSP;&安培; NBSP;&安培; NBSP;&安培; NBSP;
< asp：按钮 ID = Button1 runat = 服务器 onclick = Button1_Click 文字 < span class =code-keyword> = 发送 / >
< / td >
< / tr >
< / table >
< br / >
< / p >
< / form >
< / asp：Content >
这是我的主页，我从另一个页面复制了它：
<％@ Master Language = C＃AutoEventWireup =trueCodeFile =Manager.master.csInherits =Admin％>
<！DOCTYPE html PUBLIC - // W3C // DTD XHTML 1.0 Transitional // ENhttp://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
< html xmlns =http://www.w3.org/1999/xhtml>
< head runat =server>
< title> Untitled Page< / title>
< asp：ContentPlaceHolder id =headrunat =server>
< / head>
< body alink =＃ffffcc>
< form id =form1runat =server>
style =font-size：xx-large; font-weight：bold; font-style：normal;颜色：＃3399FF; background-color：#FFFFCC;身高：142px;宽度：961px;>
薪资管理系统
< asp：菜单ID =Menu1runat =serverBackColor =＃B5C7DE
DynamicHorizontalOffset =2Font-Bold =TrueFont-Names =Verdana
字体大小=0.8emForeColor =白色高度= 21pxOrientation =Horizontal
StaticSubMenuIndent =10pxWidth =482px
onmenuitemclick =Menu1_MenuItemClick>
< staticmenustyle backcolor =＃0080C0>
< staticselectedstyle backcolor =＃507CD1>
< staticmenuitemstyle horizontalpadding =5pxverticalpadding =2px> ;
< dynamichoverstyle backcolor =＃284E98forecolor =White>
< dynamicmenustyle backcolor =＃B5C7DE>
< dynami cselectedstyle backcolor =＃507CD1>
< dynamicmenuitemstyle horizontalpadding =5pxverticalpadding =2px>
< statichoverstyle backcolor =＃284E98forecolor =白色>
< items>
< asp：MenuItem Text =HomeValue =Home>
< asp：MenuItem Text =EmployeesValue =Employees>
< asp：MenuItem NavigateUrl =〜/ Employee list.aspxText =Employee List
值=员工列表>
< asp：MenuItem Text =MessagesValue =Messages>
< asp：MenuItem Text =Compose MailValue =Compose Mail>
< asp：MenuItem Text =InboxValue =Inbox>
< asp：MenuItem Text =发件箱价值=发件箱>
& lt; asp：MenuItem Text =PayslipValue =Payslip>
< asp：MenuItem Text =Employee PayslipValue =Employee Payslip>
< asp：MenuItem Text =Genrate PayslipValue =Genrate Payslip>
< asp：MenuItem Text =Log OutValue = 退出>
< / form>
< asp：ContentPlaceHolder id =ContentPlaceHolder1runat =server>
< / body>
< / html>
解决方案
您的问题格式不正确。
由于您尝试将表单添加到依赖母版页的内容页面，因此出现此错误。
在母版页中有表单后，您无法将任何其他表单添加到依赖它的单个内容页面中。
即使我们使用母版页和内容页的组合，页面中也只允许一个表单元素。您可以从子页面中删除标记，因为您的母版页已包含表单标记，它将起作用。
Hi,
I am new in .Net programming,so kindly please help me on below.
Thanks in Advance.
This is my Default Page:
<%@ Page Language="C#" MasterPageFile="~/Manager.master" AutoEventWireup="true" CodeFile="MangerComposemessge.aspx.cs" Inherits="MangerComposemessge" Title="Untitled Page" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> <style type="text/css"> .style1 { width: 100%; border: 6px solid #FFFFCC; background-color: #FFFFCC; } .style2 { width: 228px; } </style> </asp:Content> <asp:Content ID="Content2" runat="Server" ContentPlaceHolderID="ContentPlaceHolder1" > <form id="frm" runat="server"> <p> & </p> <p> & <table class="style1"> <tr> <td class="style2"> <asp:Label ID="Label4" runat="server" Text="TO"></asp:Label> </td> <td> <asp:TextBox ID="TextBox1" runat="server" Width="222px"></asp:TextBox> </td> </tr> <tr> <td class="style2"> <asp:Label ID="Label5" runat="server" Text="Subject"></asp:Label> </td> <td> <asp:TextBox ID="TextBox2" runat="server" Width="223px"></asp:TextBox> </td> </tr> <tr> <td class="style2"> <asp:Label ID="Label6" runat="server" Text="Message"></asp:Label> </td> <td> <asp:TextBox ID="TextBox3" runat="server" Height="97px" TextMode="MultiLine" Width="315px"></asp:TextBox> </td> </tr> <tr> <td class="style2"> <asp:Label ID="Label7" runat="server" Text="Attachment"></asp:Label> </td> <td> <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox> <asp:Button ID="Button2" runat="server" Text="Browse" /> </td> </tr> <tr> <td class="style2"> </td> <td> </td> </tr> <tr> <td class="style2"> </td> <td> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Send" /> </td> </tr> </table> <br /> </p> </form> </asp:Content>
This is my master page that i copied it from another one:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="Manager.master.cs" Inherits="Admin" %>
<!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>Untitled Page</title>
<asp:ContentPlaceHolder id="head" runat="server">
</head>
<body alink="#ffffcc">
<form id="form1" runat="server">
style="font-size: xx-large; font-weight: bold; font-style: normal; color: #3399FF; background-color: #FFFFCC; height: 142px; width: 961px;">
Payroll Management System
<asp:Menu ID="Menu1" runat="server" BackColor="#B5C7DE"
DynamicHorizontalOffset="2" Font-Bold="True" Font-Names="Verdana"
Font-Size="0.8em" ForeColor="White" Height="21px" Orientation="Horizontal"
StaticSubMenuIndent="10px" Width="482px"
onmenuitemclick="Menu1_MenuItemClick">
<staticmenustyle backcolor="#0080C0">
<staticselectedstyle backcolor="#507CD1">
<staticmenuitemstyle horizontalpadding="5px" verticalpadding="2px">
<dynamichoverstyle backcolor="#284E98" forecolor="White">
<dynamicmenustyle backcolor="#B5C7DE">
<dynamicselectedstyle backcolor="#507CD1">
<dynamicmenuitemstyle horizontalpadding="5px" verticalpadding="2px">
<statichoverstyle backcolor="#284E98" forecolor="White">
<items>
<asp:MenuItem Text="Home" Value="Home">
<asp:MenuItem Text="Employees" Value="Employees">
<asp:MenuItem NavigateUrl="~/Employee list.aspx" Text="Employee List"
Value="Employee List">
<asp:MenuItem Text="Messages" Value="Messages">
<asp:MenuItem Text="Compose Mail" Value="Compose Mail">
<asp:MenuItem Text="Inbox" Value="Inbox">
<asp:MenuItem Text="Outbox" Value="Outbox">
<asp:MenuItem Text="Payslip" Value="Payslip">
<asp:MenuItem Text="Employee Payslip" Value="Employee Payslip">
<asp:MenuItem Text="Genrate Payslip" Value="Genrate Payslip">
<asp:MenuItem Text="Log Out" Value="Log Out">
</form>
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server">
</body>
</html>解决方案Your question is not well formatted.
This error came up because you tried to add a form to a content page relying on a master page.
Once you have a form in master page you cant add any other form to individual content page relying on it..
Only one form element is allowed in a page even if we are using a combination of master page and content page. You can remove tag from the child page since already your master page contains the form tag and it will work .
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