cookie购物车
cookie版购物车
添加商品到购物车的方法
#region 添加到购物车AddShoppingCar
/// <summary>
/// 添加到购物车AddShoppingCar
/// </summary>
/// <param name="num">数量 如果存在产品 负数是减少 正数是增加 如果不存在 直接增加</param>
/// <param name="id">货物ID</param>
/// <param name="expires">cookies保存的天数</param>
public static void AddShoppingCar(string num, string id, int expires)
{
if (System.Web.HttpContext.Current.Request.Cookies["Products"] != null)
{
System.Web.HttpCookie cookie;
string cookievalue = System.Web.HttpContext.Current.Request.Cookies["Products"].Value;
if (System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id] == null)
{
cookievalue = cookievalue + "&" + id + "=" + num;
}
else
{
int num1 = int.Parse(System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id].ToString()) + int.Parse(num);
if (num1 > 0)
{
System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id] = num1.ToString();
}
else
{
System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id] = "0";
}
cookievalue = System.Web.HttpContext.Current.Request.Cookies["Products"].Value;
}
cookie = new System.Web.HttpCookie("Products", cookievalue);
if (expires != 0)
{
DateTime dt = DateTime.Now;
TimeSpan ts = new TimeSpan(expires, 0, 0, 20);
cookie.Expires = dt.Add(ts);
}
System.Web.HttpContext.Current.Response.AppendCookie(cookie);
}
else
{
System.Web.HttpCookie newcookie = new HttpCookie("Products");
if (expires != 0)
{
DateTime dt = DateTime.Now;
TimeSpan ts = new TimeSpan(expires, 0, 0, 20);
newcookie.Expires = dt.Add(ts);
}
newcookie.Values[id] = num;
System.Web.HttpContext.Current.Response.AppendCookie(newcookie);
}
}
#endregion
删除产品的方法 （仅仅是使商品数量为0）
#region 根据ID删除产品RemoveShoppingCar
/// <summary>
/// 根据ID删除产品RemoveShoppingCar
/// </summary>
/// <param name="id">产品ID</param>
public static void RemoveShoppingCar(string id)
{
if (System.Web.HttpContext.Current.Request.Cookies["Products"] != null && System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id] != null)
{
System.Web.HttpCookie cookie;
System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id] = "0";
string cookievalue = System.Web.HttpContext.Current.Request.Cookies["Products"].Value;
cookie = new System.Web.HttpCookie("Products", cookievalue);
System.Web.HttpContext.Current.Response.AppendCookie(cookie);
}
}
#endregion
修改产品数量
#region 根据ID修改产品UpdateShoppingCar
/// <summary>
/// 根据ID修改产品UpdateShoppingCar
/// </summary>
/// <param name="id">产品ID</param>
public static void UpdateShoppingCar(string id,string num)
{
if (System.Web.HttpContext.Current.Request.Cookies["Products"] != null && System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id] != null)
{
System.Web.HttpCookie cookie;
System.Web.HttpContext.Current.Request.Cookies["Products"].Values[id] = num;
string cookievalue = System.Web.HttpContext.Current.Request.Cookies["Products"].Value;
cookie = new System.Web.HttpCookie("Products", cookievalue);
System.Web.HttpContext.Current.Response.AppendCookie(cookie);
}
}
#endregion
获取列表
#region 得到所有的产品列表GetAllChoppingCar
/// <summary>
/// 得到所有的产品列表GetAllChoppingCar
/// </summary>
/// <returns>DataTable</returns>
public static DataTable GetAllChoppingCar()
{
if (System.Web.HttpContext.Current.Request.Cookies["Products"] != null)
{
int count = System.Web.HttpContext.Current.Request.Cookies["Products"].Values.Count;
DataColumn dcid = new DataColumn("id");
DataColumn dcnum = new DataColumn("num");
DataTable dt = new DataTable();
dt.Columns.Add(dcid);
dt.Columns.Add(dcnum);
string[] str = System.Web.HttpContext.Current.Request.Cookies["Products"].Value.Split('&');
for (int i = 0; i < str.Length; i++)
{
DataRow dr = dt.NewRow();
dr["id"] = (str[i].Split('='))[0].ToString();
dr["num"] = (str[i].Split('='))[1].ToString();
if (int.Parse((str[i].Split('='))[1].ToString()) != 0)
{
dt.Rows.Add(dr);
}
}
return dt;
}
else
{
return null;
}
}
#endregion
