操作描述：

• System.NullReferenceException: 未将对象引用设置到对象的实例。 在 ASP.jxjymain_aspx.__Renderform1(HtmlTextWriter __w, Control parameterContainer) 位置 d:\website\eduruixin\jxjymain.aspx:行号 532 在 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) 在 System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) 在 System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) 在 System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) 在 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) 在 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) 在 System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) 在 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) 在 System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) 在 System.Web.UI.Page.Render(HtmlTextWriter writer) 在 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) 在 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) 在 System.Web.UI.Control.RenderControl(HtmlTextWriter writer) 在 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
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