private DataTable GetDataTableForOutput()
{
string name = tb_AddName.Text.Trim();
string school = ddl_School.SelectedValue;
string sex = ddl_sex.SelectedValue;
string startYear = input_start.Value;
string endYear = input_end.Value;
return(StudentBusiness.GetStudentsAsDataTable(name, school, sex, startYear, endYear));
}
