[NullReferenceException: 未将对象引用设置到对象的实例。]
GeZi.Wo.download.DoDownload() in D:\Excel工程\VSTO\SVNCode\GeZi\GeZi\Wo\download.aspx.cs:63
GeZi.Wo.download.Page_Load(Object sender, EventArgs e) in D:\Excel工程\VSTO\SVNCode\GeZi\GeZi\Wo\download.aspx.cs:37
System.Web.UI.Control.OnLoad(EventArgs e) +107
System.Web.UI.Control.LoadRecursive() +89
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1532
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