public bool Add(Interwebsite.Model.Announcement model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("insert into Announcement(");
            strSql.Append("AnnouncementName,AnnouncementInfo,Author,CreateTime,ModifyTime)");
            strSql.Append(" values (");
            strSql.Append("@AnnouncementName,@AnnouncementInfo,@Author,@CreateTime,@ModifyTime)");
            SqlParameter[] parameters = {
                    new SqlParameter("@AnnouncementName", SqlDbType.NVarChar,100),
                    new SqlParameter("@AnnouncementInfo", SqlDbType.Text,16),
                    new SqlParameter("@Author", SqlDbType.NVarChar,20),
                    new SqlParameter("@CreateTime", SqlDbType.DateTime),
                    new SqlParameter("@ModifyTime", SqlDbType.DateTime)};
            parameters[0].Value = model.AnnouncementName;
            parameters[1].Value = model.AnnouncementInfo;
            parameters[2].Value = model.Author;
            parameters[3].Value = model.CreateTime;
            parameters[4].Value = model.ModifyTime;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 增加一条数据
        /// </summary>
        public bool Add(Interwebsite.Model.Attachment model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("insert into Attachment(");
            strSql.Append("ID,AttachmentName,UploadName,UploadTime,AttachmentAddress)");
            strSql.Append(" values (");
            strSql.Append("@ID,@AttachmentName,@UploadName,@UploadTime,@AttachmentAddress)");
            SqlParameter[] parameters = {
                    new SqlParameter("@ID", SqlDbType.Int,4),
                    new SqlParameter("@AttachmentName", SqlDbType.NVarChar,100),
                    new SqlParameter("@UploadName", SqlDbType.NVarChar,50),
                    new SqlParameter("@UploadTime", SqlDbType.DateTime),
                    new SqlParameter("@AttachmentAddress", SqlDbType.NVarChar,100)};
            parameters[0].Value = model.ID;
            parameters[1].Value = model.AttachmentName;
            parameters[2].Value = model.UploadName;
            parameters[3].Value = model.UploadTime;
            parameters[4].Value = model.AttachmentAddress;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 增加一条数据
        /// </summary>
        public bool Add(Interwebsite.Model.Project model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("insert into Project(");
            strSql.Append("ProjectName,ProjectInfo,RecruitGuide,CreateTime,ModifyTime,Attachment)");
            strSql.Append(" values (");
            strSql.Append("@ProjectName,@ProjectInfo,@RecruitGuide,@CreateTime,@ModifyTime,@Attachment)");
            SqlParameter[] parameters = {
                    new SqlParameter("@ProjectName", SqlDbType.NVarChar,50),
                    new SqlParameter("@ProjectInfo", SqlDbType.Text,16),
                    new SqlParameter("@RecruitGuide", SqlDbType.Text,16),
                    new SqlParameter("@CreateTime", SqlDbType.DateTime),
                    new SqlParameter("@ModifyTime", SqlDbType.DateTime),
                    new SqlParameter("@Attachment",SqlDbType.NVarChar,100)
                                        };
            parameters[0].Value = model.ProjectName;
            parameters[1].Value = model.ProjectInfo;
            parameters[2].Value = model.RecruitGuide;
            parameters[3].Value = model.CreateTime;
            parameters[4].Value = model.ModifyTime;
            parameters[5].Value = model.Attachment;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 增加一条数据
        /// </summary>
        public bool Add(Interwebsite.Model.School model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("insert into School(");
            strSql.Append("ID,SchoolName,Nation,Linkman,LinkAddress,Email,LinkPhone,SchoolInfo,CreateTime,ModifyTime)");
            strSql.Append(" values (");
            strSql.Append("@ID,@SchoolName,@Nation,@Linkman,@LinkAddress,@Email,@LinkPhone,@SchoolInfo,@CreateTime,@ModifyTime)");
            SqlParameter[] parameters = {
                    new SqlParameter("@ID", SqlDbType.Int,4),
                    new SqlParameter("@SchoolName", SqlDbType.NVarChar,50),
                    new SqlParameter("@Nation", SqlDbType.NVarChar,50),
                    new SqlParameter("@Linkman", SqlDbType.NVarChar,50),
                    new SqlParameter("@LinkAddress", SqlDbType.NVarChar,100),
                    new SqlParameter("@Email", SqlDbType.NVarChar,50),
                    new SqlParameter("@LinkPhone", SqlDbType.Int,4),
                    new SqlParameter("@SchoolInfo", SqlDbType.NVarChar,2000),
                    new SqlParameter("@CreateTime", SqlDbType.DateTime),
                    new SqlParameter("@ModifyTime", SqlDbType.DateTime)};
            parameters[0].Value = model.ID;
            parameters[1].Value = model.SchoolName;
            parameters[2].Value = model.Nation;
            parameters[3].Value = model.Linkman;
            parameters[4].Value = model.LinkAddress;
            parameters[5].Value = model.Email;
            parameters[6].Value = model.LinkPhone;
            parameters[7].Value = model.SchoolInfo;
            parameters[8].Value = model.CreateTime;
            parameters[9].Value = model.ModifyTime;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 增加一条数据
        /// </summary>
        public bool Add(Interwebsite.Model.Student model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into Student(");
            strSql.Append("Username,Password,Realname,Sex,PhoneNumber,Email,CreateTime,ModifyTime)");
            strSql.Append(" values (");
            strSql.Append("@Username,@Password,@Realname,@Sex,@PhoneNumber,@Email,@CreateTime,@ModifyTime)");
            SqlParameter[] parameters = {
                    new SqlParameter("@Username", SqlDbType.NVarChar,100),
                    new SqlParameter("@Password", SqlDbType.NVarChar,100),
                    new SqlParameter("@Realname", SqlDbType.NVarChar,50),
                    new SqlParameter("@Sex", SqlDbType.NVarChar,20),
                    new SqlParameter("@PhoneNumber", SqlDbType.NVarChar,15),
                    new SqlParameter("@Email", SqlDbType.NVarChar,50),
                    new SqlParameter("@CreateTime", SqlDbType.DateTime),
                    new SqlParameter("@ModifyTime", SqlDbType.DateTime),
                                        };
            parameters[0].Value = model.Username;
            parameters[1].Value = model.Password;
            parameters[2].Value = model.Realname;
            parameters[3].Value = model.Sex;
            parameters[4].Value = model.PhoneNumber;
            parameters[5].Value = model.Email;
            parameters[6].Value = model.CreateTime;
            parameters[7].Value = model.ModifyTime;

            int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
 /// <summary>
 /// 更新一条数据
 /// </summary>
 public bool Update(Interwebsite.Model.Announcement model)
 {
     return dal.Update(model);
 }
 /// <summary>
 /// 增加一条数据
 /// </summary>
 public bool Add(Interwebsite.Model.Announcement model)
 {
     return dal.Add(model);
 }
 /// <summary>
 /// 增加一条数据
 /// </summary>
 public bool Add(Interwebsite.Model.Project model)
 {
     return dal.Add(model);
 }
 /// <summary>
 /// 更新一条数据
 /// </summary>
 public bool Update(Interwebsite.Model.Project model)
 {
     return dal.Update(model);
 }
 /// <summary>
 /// 增加一条数据
 /// </summary>
 public bool Add(Interwebsite.Model.Attachment model)
 {
     return dal.Add(model);
 }
 /// <summary>
 /// 更新一条数据
 /// </summary>
 public bool Update(Interwebsite.Model.Attachment model)
 {
     return dal.Update(model);
 }
 /// <summary>
 /// 增加一条数据
 /// </summary>
 public bool Add(Interwebsite.Model.School model)
 {
     return dal.Add(model);
 }
 /// <summary>
 /// 更新一条数据
 /// </summary>
 public bool AddandUpdate(Interwebsite.Model.Student model)
 {
     StringBuilder strSql = new StringBuilder();
     strSql.Append("update Student set ");
     strSql.Append("Realname=@Realname,");
     strSql.Append("Sex=@Sex,");
     strSql.Append("IDCardNumber=@IDCardNumber,");
     strSql.Append("Birthday=@Birthday,");
     strSql.Append("Ethnic=@Ethnic,");
     strSql.Append("DomicileAddress=@DomicileAddress,");
     strSql.Append("Address=@Address,");
     strSql.Append("Postalcode=@Postalcode,");
     strSql.Append("QQnumber=@QQnumber,");
     strSql.Append("PhoneNumber=@PhoneNumber,");
     strSql.Append("Email=@Email,");
     strSql.Append("FamilyAddress=@FamilyAddress,");
     strSql.Append("ModifyTime=@ModifyTime,");
     strSql.Append("FirstProject=@FirstProject,");
     strSql.Append("SecondProject=@SecondProject,");
     strSql.Append("GraduateSchool=@GraduateSchool,");
     strSql.Append("Major=@Major,");
     strSql.Append("GraduateTime=@GraduateTime,");
     strSql.Append("EntranceTime=@EntranceTime,");
     strSql.Append("EnglishLevel=@EnglishLevel,");
     strSql.Append("UndergraduateGPA=@UndergraduateGPA,");
     strSql.Append("WorkExperience=@WorkExperience,");
     strSql.Append("RewardsAndPunish=@RewardsAndPunish");
     strSql.Append("politic=@politic");
     strSql.Append("famzipcode=@famzipcode");
     strSql.Append(" where username=@username");
     SqlParameter[] parameters = {
             new SqlParameter("@Realname", SqlDbType.NVarChar,50),
             new SqlParameter("@Sex", SqlDbType.NVarChar,20),
             new SqlParameter("@IDCardNumber", SqlDbType.NVarChar,30),
             new SqlParameter("@Birthday", SqlDbType.DateTime),
             new SqlParameter("@Ethnic", SqlDbType.NVarChar,30),
             new SqlParameter("@DomicileAddress", SqlDbType.NVarChar,100),
             new SqlParameter("@Address", SqlDbType.NVarChar,100),
             new SqlParameter("@Postalcode", SqlDbType.NVarChar,6),
             new SqlParameter("@QQnumber", SqlDbType.NVarChar,11),
             new SqlParameter("@PhoneNumber", SqlDbType.NVarChar,15),
             new SqlParameter("@Email", SqlDbType.NVarChar,50),
             new SqlParameter("@FamilyAddress", SqlDbType.NVarChar,100),
             new SqlParameter("@ModifyTime", SqlDbType.DateTime),
             new SqlParameter("@FirstProject", SqlDbType.NVarChar,50),
             new SqlParameter("@SecondProject", SqlDbType.NVarChar,50),
             new SqlParameter("@GraduateSchool", SqlDbType.NVarChar,50),
             new SqlParameter("@Major", SqlDbType.NVarChar,50),
             new SqlParameter("@GraduateTime", SqlDbType.DateTime),
             new SqlParameter("@EntranceTime", SqlDbType.DateTime),
             new SqlParameter("@EnglishLevel", SqlDbType.NVarChar,50),
             new SqlParameter("@UndergraduateGPA", SqlDbType.Decimal,9),
             new SqlParameter("@WorkExperience", SqlDbType.Text,16),
             new SqlParameter("@RewardsAndPunish", SqlDbType.Text,16),
             new SqlParameter("@username", SqlDbType.NVarChar,50),
             new SqlParameter("@politic", SqlDbType.NVarChar,50),
             new SqlParameter("@famzipcode", SqlDbType.NVarChar,10),
                                 };
     parameters[0].Value = model.Realname;
     parameters[1].Value = model.Sex;
     parameters[2].Value = model.IDCardNumber;
     parameters[3].Value = model.Birthday;
     parameters[4].Value = model.Ethnic;
     parameters[5].Value = model.DomicileAddress;
     parameters[6].Value = model.Address;
     parameters[7].Value = model.Postalcode;
     parameters[8].Value = model.QQnumber;
     parameters[9].Value = model.PhoneNumber;
     parameters[10].Value = model.Email;
     parameters[11].Value = model.FamilyAddress;
     parameters[12].Value = model.ModifyTime;
     parameters[13].Value = model.FirstProject;
     parameters[14].Value = model.SecondProject;
     parameters[15].Value = model.GraduateSchool;
     parameters[16].Value = model.Major;
     parameters[17].Value = model.GraduateTime;
     parameters[18].Value = model.EntranceTime;
     parameters[19].Value = model.EnglishLevel;
     parameters[20].Value = model.UndergraduateGPA;
     parameters[21].Value = model.WorkExperience;
     parameters[22].Value = model.RewardsAndPunish;
     parameters[23].Value = model.Username;
     parameters[24].Value = model.politic;
     parameters[25].Value = model.famzipcode;
     int rows = DbHelperSQL.ExecuteSql(strSql.ToString(), parameters);
     if (rows > 0)
     {
         return true;
     }
     else
     {
         return false;
     }
 }
        /// <summary>
        /// 更新一条数据
        /// </summary>
        public bool Update(Interwebsite.Model.Project model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("update Project set ");
            strSql.Append("ID=@ID,");
            strSql.Append("ProjectName=@ProjectName,");
            strSql.Append("ProjectInfo=@ProjectInfo,");
            strSql.Append("RecruitGuide=@RecruitGuide,");
            strSql.Append("CreateTime=@CreateTime,");
            strSql.Append("ModifyTime=@ModifyTime");
            strSql.Append(" where ");
            SqlParameter[] parameters = {
                    new SqlParameter("@ID", SqlDbType.Int,4),
                    new SqlParameter("@ProjectName", SqlDbType.NVarChar,50),
                    new SqlParameter("@ProjectInfo", SqlDbType.NVarChar,2000),
                    new SqlParameter("@RecruitGuide", SqlDbType.NVarChar,2000),
                    new SqlParameter("@CreateTime", SqlDbType.DateTime),
                    new SqlParameter("@ModifyTime", SqlDbType.DateTime)};
            parameters[0].Value = model.ID;
            parameters[1].Value = model.ProjectName;
            parameters[2].Value = model.ProjectInfo;
            parameters[3].Value = model.RecruitGuide;
            parameters[4].Value = model.CreateTime;
            parameters[5].Value = model.ModifyTime;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
 /// <summary>
 /// 更新一条数据
 /// </summary>
 public bool AddandUpdate(Interwebsite.Model.Student model)
 {
     return dal.AddandUpdate(model);
 }
 /// <summary>
 /// 增加一条数据
 /// </summary>
 public bool Add(Interwebsite.Model.Student model)
 {
     return dal.Add(model);
 }
        /// <summary>
        /// 更新一条数据
        /// </summary>
        public bool Update(Interwebsite.Model.Attachment model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("update Attachment set ");
            strSql.Append("ID=@ID,");
            strSql.Append("AttachmentName=@AttachmentName,");
            strSql.Append("UploadName=@UploadName,");
            strSql.Append("UploadTime=@UploadTime,");
            strSql.Append("AttachmentAddress=@AttachmentAddress");
            strSql.Append(" where ");
            SqlParameter[] parameters = {
                    new SqlParameter("@ID", SqlDbType.Int,4),
                    new SqlParameter("@AttachmentName", SqlDbType.NVarChar,100),
                    new SqlParameter("@UploadName", SqlDbType.NVarChar,50),
                    new SqlParameter("@UploadTime", SqlDbType.DateTime),
                    new SqlParameter("@AttachmentAddress", SqlDbType.NVarChar,100)};
            parameters[0].Value = model.ID;
            parameters[1].Value = model.AttachmentName;
            parameters[2].Value = model.UploadName;
            parameters[3].Value = model.UploadTime;
            parameters[4].Value = model.AttachmentAddress;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 更新一条数据
        /// </summary>
        public bool Update(Interwebsite.Model.Announcement model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("update Announcement set ");
            strSql.Append("ID=@ID,");
            strSql.Append("AnnouncementName=@AnnouncementName,");
            strSql.Append("AnnouncementInfo=@AnnouncementInfo,");
            strSql.Append("Author=@Author,");
            strSql.Append("CreateTime=@CreateTime,");
            strSql.Append("ModifyTime=@ModifyTime");
            strSql.Append(" where ");
            strSql.Append("ID='"+model.ID+"'");
            SqlParameter[] parameters = {
                    new SqlParameter("@ID", SqlDbType.Int,4),
                    new SqlParameter("@AnnouncementName", SqlDbType.NVarChar,100),
                    new SqlParameter("@AnnouncementInfo", SqlDbType.Text,16),
                    new SqlParameter("@Author", SqlDbType.NVarChar,20),
                    new SqlParameter("@CreateTime", SqlDbType.DateTime),
                    new SqlParameter("@ModifyTime", SqlDbType.DateTime)};
            parameters[0].Value = model.ID;
            parameters[1].Value = model.AnnouncementName;
            parameters[2].Value = model.AnnouncementInfo;
            parameters[3].Value = model.Author;
            parameters[4].Value = model.CreateTime;
            parameters[5].Value = model.ModifyTime;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        /// <summary>
        /// 更新一条数据
        /// </summary>
        public bool Update(Interwebsite.Model.School model)
        {
            StringBuilder strSql=new StringBuilder();
            strSql.Append("update School set ");
            strSql.Append("ID=@ID,");
            strSql.Append("SchoolName=@SchoolName,");
            strSql.Append("Nation=@Nation,");
            strSql.Append("Linkman=@Linkman,");
            strSql.Append("LinkAddress=@LinkAddress,");
            strSql.Append("Email=@Email,");
            strSql.Append("LinkPhone=@LinkPhone,");
            strSql.Append("SchoolInfo=@SchoolInfo,");
            strSql.Append("CreateTime=@CreateTime,");
            strSql.Append("ModifyTime=@ModifyTime");
            strSql.Append(" where ");
            SqlParameter[] parameters = {
                    new SqlParameter("@ID", SqlDbType.Int,4),
                    new SqlParameter("@SchoolName", SqlDbType.NVarChar,50),
                    new SqlParameter("@Nation", SqlDbType.NVarChar,50),
                    new SqlParameter("@Linkman", SqlDbType.NVarChar,50),
                    new SqlParameter("@LinkAddress", SqlDbType.NVarChar,100),
                    new SqlParameter("@Email", SqlDbType.NVarChar,50),
                    new SqlParameter("@LinkPhone", SqlDbType.Int,4),
                    new SqlParameter("@SchoolInfo", SqlDbType.NVarChar,2000),
                    new SqlParameter("@CreateTime", SqlDbType.DateTime),
                    new SqlParameter("@ModifyTime", SqlDbType.DateTime)};
            parameters[0].Value = model.ID;
            parameters[1].Value = model.SchoolName;
            parameters[2].Value = model.Nation;
            parameters[3].Value = model.Linkman;
            parameters[4].Value = model.LinkAddress;
            parameters[5].Value = model.Email;
            parameters[6].Value = model.LinkPhone;
            parameters[7].Value = model.SchoolInfo;
            parameters[8].Value = model.CreateTime;
            parameters[9].Value = model.ModifyTime;

            int rows=DbHelperSQL.ExecuteSql(strSql.ToString(),parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
 /// <summary>
 /// 更新一条数据
 /// </summary>
 public bool Update(Interwebsite.Model.School model)
 {
     return dal.Update(model);
 }