Excel数据导入到Sharepoint List

　　　　 Common com = new Common();
        public ImportExcelToList()
        {
        }

        private string _TelephoneList;
        [Personalizable(true)]
        [WebBrowsable(true)]
        [WebDisplayName("Telephone List Name")]
        [DefaultValue("Telephone")]
        public string TelephoneList
        {
            set { _TelephoneList = value; }
            get { return _TelephoneList; }
        }

        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            InitializeControl();
        }

        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void btn_upload_Click(object sender, EventArgs e)
        {
            try
            {
                if (this.upload_Excel.HasFile)
                {
                    List<string> lis = com.getAppManager("Telephone");
                    string fileName = "Telephone_" + System.DateTime.Now.ToString("yyyyMMddhhmmss");
                    string destiation =Constants.file_TelephoneDestination + fileName + ".xlsx";
                    this.upload_Excel.SaveAs(destiation);
                    ImportExcel(lis, destiation, TelephoneList);
                }
                else
                {
                    lb_error.Text = "Please choose telephone excel file to upload, in sheet which name is ‘Date‘.";
                }
            }
            catch (Exception ex)
            {
                lb_error.Text = ex.Message;
            }
        }

        private void CreateFolderInList(string folderName, SPList list,SPWeb web)
        {
            try
            {
                //Check if the Folder is already available in the list
                SPQuery query = new SPQuery();
                query.Query = "<Where><And><Eq><FieldRef Name=‘Title‘/><Value Type=‘Text‘>" + folderName + "</Value></Eq><Eq><FieldRef Name=‘FSObjType‘/><Value Type=‘Lookup‘>1</Value></Eq></And></Where>";
                query.ViewAttributes = "Scope=\"RecursiveAll\"";

                //Retrieve the items based on Query
                SPListItemCollection items = list.GetItems(query);

                //Item count is "0" if the folder does not exist
                if (items.Count == 0)
                {
                    SPListItem folderItem = list.AddItem(list.RootFolder.ServerRelativeUrl, SPFileSystemObjectType.Folder);
                    folderItem["Title"] = folderName;
                    folderItem.Update();
                    //return folderItem.Url;
                }
                else
                {
                    com.cleanListData(list, folderName,web);
                }
            }
            catch (Exception ex)
            {
                lb_error.Text = ex.Message;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="l">config file</param>
        /// <param name="filePath">Excel path</param>
        /// <param name="listName">list name</param>
        /// <param name="folder">list folder</param>
        private void ImportExcel(List<string> l, string filePath, string listName)
        {
            DataTable dt = ExcelToDS(filePath);
            string folder = dt.Rows[0]["Month"].ToString();
            using (SPSite spSite =new SPSite(SPContext.Current.Web.Url))
            {
                using (SPWeb spWeb = spSite.OpenWeb())
                {
                    spWeb.AllowUnsafeUpdates = true;
                    SPList list = spWeb.Lists[listName];
                    CreateFolderInList(folder, list, spWeb);
                    foreach (DataRow row in dt.AsEnumerable())
                    {
                        //add item to list folder
                        SPListItem spListItem = list.Items.Add(list.RootFolder.SubFolders[folder].ServerRelativeUrl, SPFileSystemObjectType.File);
                        for (int i = 0; i < l.Count; i++)
                        {
                            string colName = l[i];
                            if (colName != "All")
                            {
                                spListItem[colName] = row[i];
                            }
                            else
                            {

                            }
                        }
                        spListItem.Update();
                    }
                    spWeb.AllowUnsafeUpdates = false;
                }
            }
        }

        /// <summary>
        /// get datatable from sheet Data
        /// </summary>
        /// <param name="Path"></param>
        /// <returns></returns>
        public DataTable ExcelToDS(string Path)
        {
            DataTable dt = new DataTable();
            string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Path + ";Extended Properties=\"Excel 12.0;HDR=YES;IMEX=1\"";
            /// strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Path + ";Extended Properties=‘Excel 8.0;HDR=False;IMEX=1‘";
            SPSecurity.RunWithElevatedPrivileges(delegate()
            {
                OleDbConnection conn = new OleDbConnection(strConn);
                try
                {
                    if (conn.State != ConnectionState.Open)
                        conn.Open();
                    string strExcel = "select * from [Data$] where `Line` Is Not Null";
                    OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, conn);
                    adapter.Fill(dt);
                    
                }
                catch (Exception ex)
                {
                    lb_error.Text = ex.Message;
                }
                finally
                {
                    if (conn.State != ConnectionState.Closed)
                        conn.Close();
                }
            });
            return dt;
        }

        /// <summary>
        /// Get list from xml configuration
        /// </summary>
        /// <param name="strListId"></param>
        /// <returns></returns>
        public List<string> getAppManager(string strListId)
        {
            List<string> FieldList = new List<string>();
            XElement root = XElement.Load(Constants.xml_ImportList);
            IEnumerable<XElement> address = from el in root.Elements("listId")
                                            where (string)el.Attribute("id").Value == strListId
                                            select el;
            foreach (XElement el in address)
            {
                foreach (XNode node in el.Nodes())
                {
                    XElement nod = (XElement)node;
                    string FieldName = nod.Value;
                    FieldList.Add(FieldName);
                }
            }
            return FieldList;
        }

        public void cleanListData(SPList list, string folderName, SPWeb web)
        {
            SPQuery query = new SPQuery();
            query.Query = string.Format(@"<Where>
                                        </Where>
                                        ");
            query.ViewAttributes = "Scope=\"Recursive\"";
            if (!string.IsNullOrEmpty(folderName))
            {
                SPFolder folder = list.RootFolder.SubFolders[folderName];
                query.Folder = folder;
            }
            SPListItemCollection items = list.GetItems(query);
            StringBuilder sbDelete = new StringBuilder();
            sbDelete.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><Batch>");
            foreach (SPListItem item in items)
            {
                sbDelete.Append("<Method>");
                sbDelete.Append("<SetList Scope=\"Request\">" + list.ID + "</SetList>");
                sbDelete.Append("<SetVar Name=\"ID\">" + Convert.ToString(item.ID) + "</SetVar>");
                sbDelete.Append("<SetVar Name=\"Cmd\">Delete</SetVar>");
                sbDelete.Append("</Method>");
            }
            sbDelete.Append("</Batch>");
            web.ProcessBatchData(sbDelete.ToString());
        }

<?xml version="1.0" encoding="utf-8"?>
<lists>
<listId id="Telephone">
<field>Month</field>
<field>Line</field>
<field>Phone Type</field>
</listId>
</lists>