txt内容导入数据库

public bool ImportPurviewManIds(string fileName, string CurrentUserDomainId, string Pduid, string uploadtype) 
        { 
            try 
            { 
                if (File.Exists(fileName)) 
                { 
                    //读取文件 一行一行读取 
                    StreamReader objReader = new StreamReader(fileName, Encoding.Default); 
                    string sLine = ""; 
                    List<string> arrText = new List<string>(); 

                    while (sLine != null) 
                    { 
                        sLine = objReader.ReadLine(); 
                        if (!string.IsNullOrEmpty(sLine)) 
                        { 
                            arrText.Add(sLine); 
                        } 
                    } 
                    objReader.Close(); 


                    List<iPAL.Models.Pub.INFO_USER_CONFIG> objlist = new List<INFO_USER_CONFIG>(); 
                    IUserVisit uv = new UserVisit(); 
                    foreach (string strline in arrText.Distinct()) 
                    { 
                        if (string.IsNullOrEmpty(strline.Trim())) 
                            continue; 
                        UserInfo info = uv.GetHRInfo(strline.ToLower().Trim()); 
                        INFO_USER_CONFIG obj = new INFO_USER_CONFIG(); 
                        obj.SvrId = int.Parse(Pduid); 
                        obj.RoleName = "普通用户"; 
                        obj.UserId = strline.ToLower().Trim(); 
                        obj.UserCnName = info.UserName; 
                        objlist.Add(obj); 

                    } 
                    db.INFO_USER_CONFIG.InsertAllOnSubmit(objlist); 
                    db.SubmitChanges(); 
                } 
                return true; 
            } 
            catch (Exception ex) 
            { 
                throw ex; 
                return false; 
            } 
        }