:IE:8.0:http://localhost:8082/Activity/ActivityManage.aspx?ActivityDate=2013-06-07ISNet:System.NullReferenceException: Object reference not set to an instance of an object. at .WebUI.ISNetControl.(String 浏览器版本地址内部错误ْ, String Ԩ) at ٢.؆.­›(ISNetControl ٩, String ٞ, String ٟ, String ْ, Boolean ٽ) at ٢.؆.™(ISNetControl ٩) at ISNet.WebUI.ISNetControl.RegisterScript() at ISNet.WebUI.WebGrid.WebGrid.RegisterScript() at ISNet.WebUI.ISNetControl.(Object Ӷ, EventArgs ӷ.) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Web.UI.ControlOnPreRender(EventArgs e) at SIS.Comm.BasePage.OnPreRender(EventArgs e) in E:\SIS Solution\SIS.Comm\BasePage.cs:line 68 at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint): at ISNet.WebUI.ISNetControl.(String 堆栈ْ, String Ԩ) at ٢.؆.­›(ISNetControl ٩, String ٞ, String ٟ, String ْ, Boolean ٽ) at ٢.؆.™(ISNetControl ٩) at ISNet.WebUI.ISNetControl.RegisterScript() at ISNet.WebUI.WebGrid.WebGrid.RegisterScript() at ISNet.WebUI.ISNetControl.(Object Ӷ, EventArgs ӷControl) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Web.UI..OnPreRender(EventArgs e) at SIS.Comm.BasePage.OnPreRender(EventArgs e) in E:\SIS Solution\SIS.Comm\BasePage.cs:line 68 at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) Message:Object reference not set to an instance of an object. :ISNet.WebUI来源

地址:http://localhost:8082/Report/RptHospitalExcel.aspx  内部错误:System.Xml.XmlException: Data at the root level is invalid. Line 2, position 1.     at System.Xml.XmlTextReaderImpl.Throw(Exception e)     at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)     at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()     at System.Xml.XmlTextReaderImpl.ParseDocumentContent()     at System.Xml.XmlTextReaderImpl.Read()     at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)     at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)     at System.Xml.XmlDocument.Load(XmlReader reader)     at System.Xml.XmlDocument.LoadXml(String xml)     at ISNet.WebUI.ISNetControl.LoadPostData(String postDataKey, NameValueCollection postCollection)     at ISNet.WebUI.WebGrid.WebGrid.LoadPostData(String postDataKey, NameValueCollection values)     at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)  堆栈：   at System.Xml.XmlTextReaderImpl.Throw(Exception e)     at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)     at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()     at System.Xml.XmlTextReaderImpl.ParseDocumentContent()     at System.Xml.XmlTextReaderImpl.Read()     at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)     at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)     at System.Xml.XmlDocument.Load(XmlReader reader)     at System.Xml.XmlDocument.LoadXml(String xml)     at ISNet.WebUI.ISNetControl.LoadPostData(String postDataKey, NameValueCollection postCollection)     at ISNet.WebUI.WebGrid.WebGrid.LoadPostData(String postDataKey, NameValueCollection values)     at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)  Message:Data at the root level is invalid. Line 2, position 1.  来源:System.Xml

what this problem?