一个页面只能有一个服务器端的Form标签 [英] A page can have only one server-side Form tag

问题描述

我添加了一个带有html代码的页面到一个母版页，当我启动页面时我遇到了这个错误。

 <％@ Page Title =Language =C＃MasterPageFile = 〜/ YourGuruMaster.masterAutoEventWireup =trueCodeFile =YourGuru.aspx.csInherits =YourGuru％> 
 
< asp：Content ID =Content1ContentPlaceHolderID =headRunat =Server> 
< style type =text / css> 
 .style3 
 {
 width：114px; 
} 
 .style4 
 {
 width：293px; 
} 
 .style5 
 {
 width：126px; 
} 
< / style> 
< / asp：Content> 
 
< asp：Content ID =Content2ContentPlaceHolderID =ContentPlaceHolder1Runat =Server> 
< form id =form1runat =server> 
 
< div align =center> 
< p> 
< asp：TextBox ID =Questionrunat =serverstyle =margin-left：0pxWidth =584px>< / asp：TextBox> 
< / p> 
< / div> 
 
 
< div align =center> 
< table style =width：553px> 
< tr> 
< td class =style3> 
< asp：Button ID =Askrunat =serverText =שאלWidth =50px/> 
< / td> 
 
< td class =style4> 
< asp：DropDownList ID =DropDownList1runat =server> 
< / asp：DropDownList> 
& nbsp& nbsp& nbsp 
< asp：DropDownList ID =DropDownList2runat =server> 
< / asp：DropDownList> 
& nbsp& nbsp& nbsp 
< asp：DropDownList ID =DropDownList3runat =server> 
< / asp：DropDownList> 
< / td> 
 
< td class =style5> 
< asp：Button ID =Answerrunat =serverText =ענהWidth =50px/> 
< / td> 
< / tr> 
< / table> 
< / div> 
 
 
< / form> 
< / asp：Content> 
  

解决方案

ASP.NET Web Forms不会让你把在一个页面中有多个表单标签 - 您的母版页包含表单标记，所以：

 < asp：Content ID =Content2ContentPlaceHolderID =ContentPlaceHolder1Runat =Server> 
< form id =form1runat =server> 
< div align =center> 
  

会导致问题，因为它试图添加表单标记。无论如何，您不需要这种形式，因为您的母版页中的表单标签已经足够了。

i added a page with html code to a master page and i got that mistake when i launched the page. i wonder what i did wrong!??!

    <%@ Page Title="" Language="C#" MasterPageFile="~/YourGuruMaster.master" AutoEventWireup="true" CodeFile="YourGuru.aspx.cs" Inherits="YourGuru" %>

    <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
        <style type="text/css">
            .style3
            {
                width: 114px;
            }
        .style4
        {
            width: 293px;
        }
        .style5
        {
            width: 126px;
        }
        </style>
    </asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <form id="form1" runat="server">

      <div align="center">
        <p>
            <asp:TextBox ID="Question" runat="server" style="margin-left: 0px" Width="584px"></asp:TextBox>
        </p>
       </div>


    <div align="center">
        <table style="width: 553px">
             <tr>
                    <td class="style3">
                        <asp:Button ID="Ask" runat="server" Text="שאל" Width="50px" />     
                        </td>

                    <td class="style4">
                        <asp:DropDownList ID="DropDownList1" runat="server">
                        </asp:DropDownList>
                        &nbsp   &nbsp   &nbsp
                        <asp:DropDownList ID="DropDownList2" runat="server">
                        </asp:DropDownList>
                         &nbsp   &nbsp   &nbsp
                         <asp:DropDownList ID="DropDownList3" runat="server">
                          </asp:DropDownList>  
                       </td>

                        <td class="style5">
                            <asp:Button ID="Answer" runat="server" Text="ענה" Width="50px" />
                        </td>
                 </tr>
            </table>
    </div>


  </form>
</asp:Content>

解决方案

ASP.NET Web Forms won't let you put more than one form tag in a page - your master page contains that form tag, so this:

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<form id="form1" runat="server">
   <div align="center">

will cause problems as it's trying to add a form tag. You don't need this form here anyways as the form tag in your master page is quite adequate.

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