“TextBox”类型的控件“windowMasterSearchBox”必须放在带有 runat=server 的表单标签内答案

【问题标题】：Control 'windowMasterSearchBox' of type 'TextBox' must be placed inside a form tag with runat=server“TextBox”类型的控件“windowMasterSearchBox”必须放在带有 runat=server 的表单标签内
【发布时间】：2019-12-13 16:45:53
【问题描述】：

不确定我在哪里出错，因为没有将 windowMasterSearchBox 放置在带有 runat=server 的表单标记中。我收到以下错误：“TextBox”类型的控件“windowMasterSearchBox”必须放在带有 runat=server 的表单标记内。任何帮助，将不胜感激。谢谢！

            <div class ="field">
                <a title="Search Students" id="windowMasterMagnifyingGlass"><img src="/images/icons/magnifyingBlack.png" alt="Search Students" border="0" /></a>
                    <asp:TextBox id="windowMasterSearchBox" runat="server" placeholder="Enter Student Name..."/>
                    <asp:Label id="windowMasterSearchBoxLabel" AssociatedControlId="windowMasterSearchBox" Text="Search: " runat="server"/>
            </div>

【问题讨论】：

标签： asp.net runatserver

【解决方案1】：

ASP.NET 控件必须在表单中。

<form runat="server">

    <div class ="field">
        <a title="Search Students" id="windowMasterMagnifyingGlass"><img src="/images/icons/magnifyingBlack.png" alt="Search Students" border="0" /></a>
        <asp:TextBox id="windowMasterSearchBox" runat="server" placeholder="Enter Student Name..."/>
        <asp:Label id="windowMasterSearchBoxLabel" AssociatedControlId="windowMasterSearchBox" Text="Search: " runat="server"/>
    </div>

</form>

【讨论】：