, dataLen);

            SPSite sps = SPControl.GetContextSite(Context);
            sps.AllowUnsafeUpdates = true;
            SPWeb spw = sps.OpenWeb();
            spw.AllowUnsafeUpdates = true;
            SPList list = spw.Lists["TestDocs"];

            SPFolder folder = list.RootFolder;
            bool ex = false;
            Response.Write("folder.Exists:" + folder.Exists + "<br/>");
            //获取不带路径的纯文件名
            filename = FileUpload1.FileName;
            if (folder.Exists)
            {
                try
                {
                    ex = folder.Files[filename].Exists;
                    Response.Write("已有同名文件。");
                    return;
                }
                catch
                {
                    folder.Files.Add(filename, fileData, true);
                }
            }
        }