staffbll.cs

Linq三层模式之演示添加修改删除源码 net2008+sqlserver2005,利用Linq分三层操作数据

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
//Download from 51aspx.com/cv/LinqDemo
/// <summary>
///StaffBLL 的摘要说明
/// </summary>
public class StaffBLL
{

    Linq.StaffDataContext st = new Linq.StaffDataContext();
	public StaffBLL()
	{
		//
		//TODO: 在此处添加构造函数逻辑
		//
	}
    public IQueryable LinqStaff()
    {
        var staff = from s in st.DutyStaff  select s;
        return staff;
    }

    public bool LinqUpdateStaff(int id,string name,int age)
    {
        Linq.DutyStaff staff = st.DutyStaff.Single(a=>a.ID==id);
        staff.StaffName = name;
        staff.StaffAge = age;
        st.SubmitChanges();
        return true;
    }

    public bool LinqInsertStaff(string name,int age)
    {
        Linq.DutyStaff staff = new Linq.DutyStaff();
        staff.StaffName = name;
        staff.StaffAge = age;
        st.DutyStaff.InsertOnSubmit(staff);
        st.SubmitChanges();
        return true;
    }

    public bool LinqDeleteStaff(int id) 
    {
        Linq.DutyStaff staff = st.DutyStaff.Single(a => a.ID == id);
        st.DutyStaff.DeleteOnSubmit(staff);
        st.SubmitChanges();
        return true;

    }
}