[NullReferenceException: 未将对象引用设置到对象的实例。]
StringUtil.SubString(Object value, Int32 length) in e:\vhost\a29d9d8428bd1c7d95f3573c5cd19128\httpdocs\App_Code\StringUtil.cs:247
ASP.article_aspx.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in e:\vhost\a29d9d8428bd1c7d95f3573c5cd19128\httpdocs\article.aspx:29
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +270
System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +9840022
System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +55
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +67
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +101
System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +43
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +129
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +14
System.Web.UI.Page.Render(HtmlTextWriter writer) +30
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +67
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +101
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +27
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1342
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