报错信息如下：
“/”应用程序中的服务器错误。
--------------------------------------------------------------------------------
未将对象引用设置到对象的实例。
说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。
异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。
源错误:
行 80: {
行 81:
行 82: vCurrentListUrlAsHTML = "<%= Web.Url + "/" + (CurrentList.RootFolder.Url.Length > 0 ? CurrentList.RootFolder.Url + "/" : "") %>";
行 83: vCurrentWebUrl = "<%= Web.Url %>";
行 84: var destinationFolder;
源文件: c:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\LAYOUTS\upload.aspx 行: 82
堆栈跟踪:
[NullReferenceException: 未将对象引用设置到对象的实例。]
ASP._layouts_15_upload_aspx.__Render__control29(HtmlTextWriter __w, Control parameterContainer) in c:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\LAYOUTS\upload.aspx:82
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
Microsoft.SharePoint.WebControls.ScriptBlock.Render(HtmlTextWriter writer) +284
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
ASP._layouts_15_upload_aspx.__Render__control27(HtmlTextWriter __w, Control parameterContainer) in c:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\LAYOUTS\upload.aspx:61
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +248
Microsoft.SharePoint.WebControls.AjaxDelta.Render(HtmlTextWriter writer) +411
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +248
System.Web.UI.HtmlControls.HtmlHead.RenderChildren(HtmlTextWriter writer) +27
System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +48
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +248
System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +48
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +248
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +248
Microsoft.SharePoint.WebControls.UnsecuredLayoutsPageBase.RenderChildren(HtmlTextWriter writer) +57
System.Web.UI.Page.Render(HtmlTextWriter writer) +39
Microsoft.SharePoint.WebControls.DeltaPage.RenderToBase(HtmlTextWriter writer) +1061
Microsoft.SharePoint.WebControls.DeltaPage.Render(HtmlTextWriter writer) +123
Microsoft.SharePoint.WebControls.UnsecuredLayoutsPageBase.Render(HtmlTextWriter writer) +56
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +149
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5362
有没有遇到过这样的问题的？求解答~~~
------解决思路----------------------
亲，你至少说明，是SharePoint自带的上传报错，还是自己开发的上传报错，到底是什么操作上，哪步报错；图片类型、大小都说说，还有只是传图片报错，文档呢？
------解决思路----------------------
看错误信息是SharePoint自己的upload.aspx页面报的错，参考这个http://social.technet.microsoft.com/Forums/sharepoint/en-US/b9b9716f-352e-4417-9487-ac8d614016fe/unexpected-systemnullreferenceexception-object-reference-not-set-to-an-instance-of-an-object?forum=sharepointgeneralprevious
你重新建一个文档库试试
