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页面错误

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本页面已产生错误，如果情况紧急，您可以与我们直接联系！联系方式：刘小华 13267146689
本错误产生于如下页面: http://jwgl.szpt.edu.cn/szptjwbsII/Secure/Login.aspx?ReturnUrl=/szptjwbsII/default.aspx
错误信息: 类型“DropDownList”的控件“_ctl4_cbBackColor”必须放在具有 runat=server 的窗体标记内。

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Stack Trace:
System.Web.HttpException: 类型“DropDownList”的控件“_ctl4_cbBackColor”必须放在具有 runat=server 的窗体标记内。 at System.Web.UI.Page.VerifyRenderingInServerForm(Control control) at System.Web.UI.WebControls.DropDownList.AddAttributesToRender(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderBeginTag(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.TableCell.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.WebControls.Table.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at FriendsReunion.RightPanel.Render(HtmlTextWriter writer) in D:\WORK\SzptJwBs_090221\RightPanel.cs:line 229 at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Page.ProcessRequestMain()