知识大全自创Asp.net-cookies的购物车类

Posted 2022-07-18 产品

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自己写的一个 cookies 购物车类实现购物车功能实现无需注册就可购物 using System; using System Data; using System Configuration; using System Web; using System Web Security; using System Web UI; using System Web UI WebControls; using System Web UI WebControls WebParts; using System Web UI HtmlControls; //文章来源 x public class CookieShoppingCart /// /// 加入购物车 /// /// /// public static void AddToShoppingCart(int ProductID int Quantity int Box) if (HttpContext Current Request Cookies[ ShoppingCart ] == null) HttpCookie oCookie = new HttpCookie( ShoppingCart ); //Set Cookie to expire in hours oCookie Expires = DateTime Now AddYears( ); oCookie Value = ProductID ToString() + : + Quantity ToString() + : + Box ToString(); HttpContext Current Response Cookies Add(oCookie); //如果cookie已经存在 else bool bExists = false; HttpCookie oCookie = (HttpCookie)HttpContext Current Request Cookies[ ShoppingCart ]; oCookie Expires = DateTime Now AddYears( ); string ShoppingCartStr = oCookie Value ToString(); string[] arrCookie = ShoppingCartStr Split(new char[] ); //查看cookie中是否有该产品 string newCookie = ; for (int i = ; i < arrCookie Length; i++) if (arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )) == ProductID ToString() Trim()) bExists = true; string OldQuantity = arrCookie[i] Trim() Substring(arrCookie[i] Trim() IndexOf( : ) + );//得到数量 OldQuantity = OldQuantity Remove(OldQuantity LastIndexOf( : )); OldQuantity = (Convert ToInt (OldQuantity) + Quantity) ToString(); arrCookie[i] = arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )) + : + OldQuantity + : + Box ToString(); //HttpContext Current Response Write(arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )) + 已存在!数量 + OldQuantity + ); //HttpContext Current Response Write(arrCookie[i] + ); newCookie = newCookie + + arrCookie[i]; //如果没有该产品 if (!bExists) oCookie Value = oCookie Value + + ProductID ToString() + : + Quantity ToString() + : + Box ToString(); else oCookie Value = newCookie Substring( ); HttpContext Current Response Cookies Add(oCookie); HttpContext Current Response Write( ShoppingCart: + HttpContext Current Request Cookies[ ShoppingCart ] Value); /// /// 移除购物车子项 /// /// public static void RemoveShoppingCart(int ProductID) if (HttpContext Current Request Cookies[ ShoppingCart ] != null) HttpCookie oCookie = (HttpCookie)HttpContext Current Request Cookies[ ShoppingCart ]; oCookie Expires = DateTime Now AddYears( ); //Check if Cookie already contain same item string ShoppingCartStr = oCookie Value ToString(); string[] arrCookie = ShoppingCartStr Split(new char[] ); string[] arrCookie = new string[arrCookie Length ]; int j = ; string NewStr = ; for (int i = ; i < arrCookie Length; i++) if (arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )) != ProductID ToString()) NewStr = NewStr + + arrCookie[i]; if (NewStr == ) HttpContext Current Response Cookies[ ShoppingCart ] Value = ; else HttpContext Current Response Cookies[ ShoppingCart ] Value = NewStr Substring( ); public static void UpdateShoppingCart(int ProductID int Quantity bool box) int Box = ; if (!box) Box = ; if (HttpContext Current Request Cookies[ ShoppingCart ] != null) bool bExists = false; HttpCookie oCookie = (HttpCookie)HttpContext Current Request Cookies[ ShoppingCart ]; oCookie Expires = DateTime Now AddYears( ); string ShoppingCartStr = oCookie Value ToString(); string[] arrCookie = ShoppingCartStr Split(new char[] ); //查看cookie中是否有该产品 string newCookie = ; for (int i = ; i < arrCookie Length; i++) if (arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )) == ProductID ToString() Trim()) arrCookie[i] = arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )) + : + Quantity ToString() + : + Box ToString(); newCookie = newCookie + + arrCookie[i]; HttpContext Current Response Cookies[ ShoppingCart ] Value = newCookie Substring( ); public static DataTable GetShoppingCart() DataTable dt = new DataTable(); if (HttpContext Current Request Cookies[ ShoppingCart ] != null && HttpContext Current Request Cookies[ ShoppingCart ] Value Trim() != ) HttpCookie oCookie = (HttpCookie)HttpContext Current Request Cookies[ ShoppingCart ]; oCookie Expires = DateTime Now AddYears( ); string ShoppingCartStr = oCookie Value ToString(); //HttpContext Current Response Write(ShoppingCartStr); string[] arrCookie = ShoppingCartStr Split(new char[] ); //查看cookie中是否有该产品 string newCookie = ; for (int i = ; i < arrCookie Length; i++) newCookie = newCookie + + arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )); newCookie = newCookie Substring( ); dt = Product GetProductByProductIds(newCookie ); dt Columns Add( Quantity ); dt Columns Add( Box ); foreach (DataRow row in dt Rows) for (int i = ; i < arrCookie Length; i++) if (arrCookie[i] Trim() Remove(arrCookie[i] IndexOf( : )) == row[ ProductId ] ToString()) row[ Quantity ] = arrCookie[i] Substring(arrCookie[i] IndexOf( : ) + ); row[ Quantity ] = row[ Quantity ] ToString() Remove(row[ Quantity ] ToString() IndexOf( : )); string Box = arrCookie[i] Substring(arrCookie[i] LastIndexOf( : ) + ); if (Box == ) row[ Box ] = true; else row[ Box ] = false; else dt = Database GetDataTable( select top * from View_ProductList ); dt Columns Add( Quantity ); return dt; cha138/Article/program/net/201311/11694

知识大全 自创Asp.net-cookies的购物车类

知识大全自创Asp.net-cookies的购物车类