//将指定文件上传到指定的文件夹，上传文件需要考虑：文件大小限制、文件上传次数限制、文件同名限制、fileupload控件为空 protected void btnFileUpload_Click(object sender, EventArgs e) { //如果FileUpload控件为空，返回 if (this.fupLocalFile.FileName=="") { return; } if (IsOverTime()) { Response.Write("<script language='javascript'>alert('您今天上传文件数已经达到指定个数，如有疑问请联系管理员！');</script>"); return; } SPList lstBBSLibrary = GetLibraryByRandom(); SPFolder folder = lstBBSLibrary.RootFolder; string filePath = this.fupLocalFile.PostedFile.FileName; string fileName = filePath.Substring(filePath.LastIndexOf("\") + 1); if (IsFileExists(lstBBSLibrary, fileName)) { if (GetNoFileLibrary(lstBBSLibrary.Title,fileName) == null) { Response.Write("<script language='javascript'>alert('已有相同名称的文件存在,请更改文件名后上传！');</script>"); return; } lstBBSLibrary = GetNoFileLibrary(lstBBSLibrary.Title,fileName); } int dataLen = this.fupLocalFile.PostedFile.ContentLength; if (IsOverSize(dataLen / (1024 * 1024) + 1)) { Response.Write("<script language='javascript'>alert('上传文件超过指定最大值，如有疑问请联系管理员！');</script>"); return; } Stream fileDataStream = this.fupLocalFile.PostedFile.InputStream; string fileType = this.fupLocalFile.PostedFile.ContentType; byte[] fileData = new byte[dataLen]; fileDataStream.Read(fileData, 0, dataLen); SPWeb web = SPContext.Current.Web; web.AllowUnsafeUpdates = true; folder.Files.Add(Path.GetFileName(this.fupLocalFile.PostedFile.FileName), fileData, false); web.AllowUnsafeUpdates = false; } /// <summary> /// 按照顺时针获得没有指定文件名的文档库 /// </summary> /// <param name="fileName"></param> /// <returns></returns> private SPList GetNoFileLibrary(string currentLibraryName, string fileName) { int currentIndex = int.Parse(currentLibraryName.Substring(currentLibraryName.LastIndexOf('y'))); SPList lstNoFileLibrary = null; for (int i = currentIndex + 1; i < 6; i++) { SPList lstBBSLibrary = SPContext.Current.Web.Lists["BBSLibrary" + i]; if (!IsFileExists(lstBBSLibrary, fileName)) { lstNoFileLibrary = lstBBSLibrary; break; } } if (lstNoFileLibrary == null) { for (int i = 1; i < currentIndex + 1; i++) { SPList lstBBSLibrary = SPContext.Current.Web.Lists["BBSLibrary" + i]; if (!IsFileExists(lstBBSLibrary, fileName)) { lstNoFileLibrary = lstBBSLibrary; break; } } } return lstNoFileLibrary; } /// <summary> /// 随机选取存储上传文件的Document Library /// </summary> /// <returns></returns> public SPList GetLibraryByRandom() { Random ran = new Random(); int libNum = ran.Next(1, 5); SPList lstBBSLibrary = SPContext.Current.Web.Lists["BBSLibrary" + libNum]; return lstBBSLibrary; } /// <summary> /// 查询结果为空或者上传文件超过指定大小，返回true，否则返回false； /// </summary> /// <param name="localFileSize"></param> /// <returns></returns> public bool IsOverSize(int localFileSize) { SPListItem item = GetConfigureItem("FileMaxSize"); bool result = true; //查询结果为空或者上传文件超过指定大小，返回true，否则返回false； if (item != null && item["Num"] != null && int.Parse(item["Num"].ToString()) > localFileSize) { result = false; } return result; } /// <summary> /// 检索5个BBSLibraries，取出createdby为currentuser，created为currentdate的文件记录 /// </summary> /// <returns>查询结果为空或者小于指定个数则返回false,否则为true </returns> public bool IsOverTime() { int totalNum = 0; totalNum = GetUploadedFileNum("BBSLibrary1") + GetUploadedFileNum("BBSLibrary2") + GetUploadedFileNum("BBSLibrary3") + GetUploadedFileNum("BBSLibrary4") + GetUploadedFileNum("BBSLibrary5"); SPListItem item = GetConfigureItem("FileMaxUploadTimes"); bool result = false; if (item != null && item["Num"] != null && totalNum > int.Parse(item["Num"].ToString())) { result = true; } return result; } /// <summary> /// 获得当前用户当天在某个文档库中已上传文档数量 /// </summary> /// <param name="lstBBSLibrary"></param> /// <param name="currentUser"></param> /// <param name="currentDate"></param> /// <returns></returns> public int GetUploadedFileNum(string lstBBSLibraryName) { //获得系统当天最早时间，并将其转化为sharepoint能够识别的时间 string currentDate = SPUtility.CreateISO8601DateTimeFromSystemDateTime(DateTime.Now.Date); //获得当前用户 SPUser currentUser = Microsoft.SharePoint.WebControls.SPControl.GetContextWeb(Context).CurrentUser; SPList lstBBSLibrary = SPContext.Current.Web.Lists[lstBBSLibraryName]; SPQuery query = new SPQuery(); query.Query = string.Format(@" <Where> <And> <Eq> <FieldRef Name='Author' /> <Value Type='User'>{0}</Value> </Eq> <Gt> <FieldRef Name='Created' /> <Value Type='DateTime'>{1}</Value> </Gt> </And> </Where>", currentUser, currentDate); SPListItemCollection items = lstBBSLibrary.GetItems(query); int result = 0; if (items.Count > 0) { result = items.Count; } return result; } /// <summary> /// 获得某个配置信息 /// </summary> /// <returns></returns> public SPListItem GetConfigureItem(string condition) { SPList lstBBSConfigure = SPContext.Current.Web.Lists[ListNames.BBSConfigure]; SPQuery query = new SPQuery(); query.Query = string.Format(@" <Where> <Eq> <FieldRef Name='Title' /> <Value Type='Text'>{0}</Value> </Eq> </Where>", condition); query.ViewFields = string.Format(@"<FieldRef Name='Title' /> <FieldRef Name='Num' />"); query.RowLimit = 1; SPListItemCollection items = lstBBSConfigure.GetItems(query); SPListItem item = null; if (items.Count > 0) { item = items[0]; } return item; } /// <summary> /// 判断文档库中是否已存在该文件 /// </summary> /// <param name="lstLibrary"></param> /// <param name="fileName"></param> /// <returns></returns> public bool IsFileExists(SPList lstLibrary, string fileName) { SPQuery query = new SPQuery(); query.Query = string.Format(@"<Where> <Eq> <FieldRef Name='Title' /> <Value Type='Text'>{0}</Value> </Eq> </Where>", fileName); query.ViewAttributes = "Scope="Recursive""; SPListItemCollection items = lstLibrary.GetItems(query); bool result = true; if (items.Count < 1) { result = false; } return result; }