类型“Button”的控件“ctl00_head_ctl00_Button1”必须放在具有 runat=server 的窗体标记内。

Question

报错：
类型“Button”的控件“ctl00_head_ctl00_Button1”必须放在具有 runat=server 的窗体标记内。堆栈跟踪: [HttpException (0x80004005): 类型“Button”的控件“ctl00_head_ctl00_Button1”必须放在具有 runat=server 的窗体标记内。]
   System.Web.UI.Page.VerifyRenderingInServerForm(Control control) +8689203
   System.Web.UI.WebControls.Button.AddAttributesToRender(HtmlTextWriter writer) +54
   System.Web.UI.WebControls.WebControl.RenderBeginTag(HtmlTextWriter writer) +20
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +20
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Control.Render(HtmlTextWriter writer) +10
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Control.Render(HtmlTextWriter writer) +10
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.HtmlControls.HtmlHead.RenderChildren(HtmlTextWriter writer) +17
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Control.Render(HtmlTextWriter writer) +10
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Page.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266
上述的什么原因？怎么解决？望各位指教，谢谢。

Answer 1

<form runat="server" id="form1" 要有

Answer 2

<form runat="server" id="form1">

Answer 3

我是在母版页上嵌入一个自己写的控件。模板页上已经有<form runat="server" id="form1">了，子网页中没有写这个语句的必要吧？而且也没有写这个语句的地方啊

Answer 4

这个问题遇到过母版页 中 Button1  Id名改变了  

Answer 5

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

Answer 6

类型“Button”的控件说明是服务器端控件，服务器端控件必须有runat=“server”属性

Answer 7

<asp:Content ID="Content1" ContentPlaceHolderID="CP1" runat="server"  >内容页中加上