asp.net错误形式不能嵌套元素表单内？ [英] asp.net error form cannot be nested within element form?

问题描述

我在使用表单标签的asp.net应用程序有一个内容页。只有一个页面，所以我很困惑为什么它给我的错误上：验证（HTML5）：元素形式不能嵌套元素形式

I have a content page in an asp.net application that uses a form tag. There's only one on the page so I'm confused why its give me the error: Validation (HTML5): Element 'form' must not be nested within element 'form'

继承人的code：

<%@ Page Language="C#" AutoEventWireup="true" MasterPageFile="~/Site.Master" CodeBehind="Default.aspx.cs" Inherits="WebApplication6._Default" %>
<asp:Content ID="Content1" runat="server" ContentPlaceHolderID="MainContent">
   <div>
      <form id="form1">
         <asp:GridView ID="GridView1" runat="server" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="Id" DataSourceID="SqlDataSource1" AllowPaging="True" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
            <Columns>
               <asp:BoundField DataField="Id" HeaderText="Id" InsertVisible="False" ReadOnly="True" SortExpression="Id" />
               <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
               <asp:BoundField DataField="Director" HeaderText="Director" SortExpression="Director" />
               <asp:BoundField DataField="DateReleased" HeaderText="DateReleased" SortExpression="DateReleased" />
               <asp:TemplateField HeaderText="Selection">
                  <ItemTemplate>
                     <asp:CheckBox ID="Selections" runat="server" OnCheckedChanged="CheckBox1_CheckedChanged1" />
                  </ItemTemplate>
               </asp:TemplateField>
            </Columns>
         </asp:GridView>
         <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>" SelectCommand="SELECT * FROM [Movies]"></asp:SqlDataSource>
         <asp:Button ID="Button1" runat="server" Text="Select Movies" OnClick="Button1_Click" CausesValidation="False" />
         <asp:TextBox ID="TextBox1"  Text="First Name" runat="server"></asp:TextBox>
      </form>
   </div>
</asp:Content>

我有一个表格在我的母版但wasnt给我的问题..昨天

I have a form in my masterpage but that wasnt giving me problems yesterday..

任何想法？

推荐答案

如果你的＆LT; ASP：的ContentPlaceHolder ID =日程地址搜索Maincontent＆GT; 控制，本身里面一个格式元素，那么你不应该放置格式的 ASP内部：内容控制，你不应该有嵌套的表格。

If your <asp:ContentPlaceHolder ID="MainContent" > control is, itself, inside of a form element, then you shouldn't place a form inside of the asp:content control as you should not have nested forms.

从 HTML5 工作草案：

4.10.3的表单元素结果
  内容模型：结果
  流量的内容，但没有表单元素后裔。

4.10.3 The form element
Content model:
Flow content, but with no form element descendants.

更新

请参阅问题一页只能有一个服务器端Form标记：

母版页不应包含表单标签一般，因为他们是为了仅作为内容页面的基地布局。

Master pages should not contain form tags in general because they are meant to be used only as the base layout of your content page.

尝试使用这些准则调整你的项目：

Try to restructure your project using these guidelines:

• 只添加格式元素aspx页面


• 主要内容母版从网页添加


• 添加需要被表单中嵌套任意内容用户控件被放置在页面中。

• Only add form elements to aspx pages
• Add main content to MasterPage from pages
• Add any content that needs to be nested within a form to a UserControl that is placed within a page.

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