.写student类中的select，delete，update，insert方法并在objectDataSource中应用

public class Student

{

public int SID { get; set; }

public string SNAME { get; set; }

public string SEX { get; set; }

public int AGE { get; set; }

public DataTable StudentSelect()

{

string sql = "select sId,sName,sSex,sAge from Student";

return SqlHelper.ExecuteDataTable(sql);

}

public int StudentDelete(int sId)

{

string sql = "delete from Student where sId=@sId";

SqlParameter pms = new SqlParameter("@sId",sId);

return SqlHelper.ExecuteNonQuery(sql,pms);

}

public int StudentUpdate(int sId, string sName, string sSex, int sAge)

{

string sql = "update Student set
sName=@sname,sSex=@sex,sAge=@age where sId=@sid";

SqlParameter[] pmss = new SqlParameter[]

{

new SqlParameter("@sname",sName),

new SqlParameter("@age",sAge),

new SqlParameter("@sex",sSex),

new SqlParameter("@sid",sId)

};

return SqlHelper.ExecuteNonQuery(sql, pmss);

}

public DataTable StudentInsert(string sName, string sSex, int sAge)

{

string sql = "insert into Student(sName,sSex,sAge)values(@sname,@sex,@age)";

SqlParameter[] pms = new SqlParameter[]

{

new SqlParameter("@sname",sName),

new SqlParameter("@age",sAge),

new SqlParameter("@sex",sSex)

};

return SqlHelper.ExecuteNonQuery(sql,pms);

}

public List<Student> GetStudents()

{

string sql = "select sId,sName,sSex,sAge from Student";

DataTable dt = SqlHelper.ExecuteDataTable(sql);

List<Student> list=new List<Student>();

foreach(DataRow row in dt.Rows)

{

Student stu = new Student();

stu.SID = (int)row[0];

stu.SNAME = row[1].ToString();

stu.SEX = row[2].ToString();

stu.AGE = Convert.ToInt32(row[3]);

list.Add(stu);

}

return list;

}

}