如何利用Session对象实现购物车
这篇文章主要介绍如何利用Session对象实现购物车,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
创新互联专注于昆明网站建设服务及定制,我们拥有丰富的企业做网站经验。 热诚为您提供昆明营销型网站建设,昆明网站制作、昆明网页设计、昆明网站官网定制、微信小程序开发服务,打造昆明网络公司原创品牌,更为您提供昆明网站排名全网营销落地服务。
//shopcart.aspx.cs using System; using System.Data; using System.Configuration; using System.Collections; 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; using System.Data.SqlClient; using System.Text.RegularExpressions; public partial class shopCart : System.Web.UI.Page { CommonClass ccObj = new CommonClass(); DBClass dbObj = new DBClass(); string strSql; DataTable dtTable; Hashtable hashCar; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (Session["ShopCart"] == null) { //如果没有购物,则给出相应信息,并隐藏按钮 this.labMessage.Text = "您还没有购物!"; this.labMessage.Visible = true; //显示提示信息 this.lnkbtnCheck.Visible = false; //隐藏“前往服务台”按钮 this.lnkbtnClear.Visible = false; //隐藏“清空购物车”按钮 this.lnkbtnContinue.Visible = false; //隐藏“继续购物”按钮 } else { hashCar = (Hashtable)Session["ShopCart"]; //获取其购物车 if (hashCar.Count == 0) { //如果没有购物,则给出相应信息,并隐藏按钮 this.labMessage.Text = "您购物车中没有商品!"; this.labMessage.Visible = true; //显示提示信息 this.lnkbtnCheck.Visible = false; //隐藏“前往服务台”按钮 this.lnkbtnClear.Visible = false; //隐藏“清空购物车”按钮 this.lnkbtnContinue.Visible = false; //隐藏“继续购物”按钮 } else { //设置购物车内容的数据源 dtTable = new DataTable(); DataColumn column1 = new DataColumn("No"); //序号列 DataColumn column2 = new DataColumn("BookID"); //书籍ID代号 DataColumn column3 = new DataColumn("BookName"); //书籍名称 DataColumn column4 = new DataColumn("Num"); //数量 DataColumn column5 = new DataColumn("price"); //单价 DataColumn column6 = new DataColumn("totalPrice");//总价 dtTable.Columns.Add(column1); //添加新列 dtTable.Columns.Add(column2); dtTable.Columns.Add(column3); dtTable.Columns.Add(column4); dtTable.Columns.Add(column5); dtTable.Columns.Add(column6); DataRow row; //对数据表中每一行进行遍历,给每一行的新列赋值 //foreach (object key in hashCar.Keys) //{ // row = dtTable.NewRow(); // row["BookID"] = key.ToString(); // row["Num"] = hashCar[key].ToString(); // dtTable.Rows.Add(row); //} foreach (DictionaryEntry hash in hashCar) { row = dtTable.NewRow(); row["BookID"] = hash.Key.ToString(); row["Num"] = hash.Value.ToString(); dtTable.Rows.Add(row); } //计算价格 DataTable dstable; int i = 1; float price;//商品单价 int count; //商品数量 float totalPrice = 0; //商品总价格 foreach (DataRow drRow in dtTable.Rows) { strSql = "select BookName,HotPrice from tb_BookInfo where BookID=" + Convert.ToInt32(drRow["BookID"].ToString()); dstable = dbObj.GetDataSetStr(strSql, "tbGI"); drRow["No"] = i;//序号 drRow["BookName"] = dstable.Rows[0][0].ToString();//书籍名称 drRow["price"] = (dstable.Rows[0][1].ToString());//单价 price = float.Parse(dstable.Rows[0][1].ToString());//单价 count = Int32.Parse(drRow["Num"].ToString()); drRow["totalPrice"] = price * count; //总价 totalPrice += price * count; //计算合价 i++; } this.labTotalPrice.Text = "总价:" + totalPrice.ToString(); //显示所有商品的价格 this.gvShopCart.DataSource = dtTable.DefaultView; //绑定GridView控件 this.gvShopCart.DataKeyNames = new string[] { "BookID" }; this.gvShopCart.DataBind(); } } } } public void bind() { if (Session["ShopCart"] == null) { //如果没有购物,则给出相应信息,并隐藏按钮 this.labMessage.Text = "您还没有购物!"; this.labMessage.Visible = true; //显示提示信息 this.lnkbtnCheck.Visible = false; //隐藏“前往服务台”按钮 this.lnkbtnClear.Visible = false; //隐藏“清空购物车”按钮 this.lnkbtnContinue.Visible = false; //隐藏“继续购物”按钮 } else { hashCar = (Hashtable)Session["ShopCart"]; //获取其购物车 if (hashCar.Count == 0) { //如果没有购物,则给出相应信息,并隐藏按钮 this.labMessage.Text = "您购物车中没有商品!"; this.labMessage.Visible = true; //显示提示信息 this.lnkbtnCheck.Visible = false; //隐藏“前往服务台”按钮 this.lnkbtnClear.Visible = false; //隐藏“清空购物车”按钮 this.lnkbtnContinue.Visible = false; //隐藏“继续购物”按钮 } else { //设置购物车内容的数据源 dtTable = new DataTable(); DataColumn column1 = new DataColumn("No"); //序号列 DataColumn column2 = new DataColumn("BookID"); //书籍ID代号 DataColumn column3 = new DataColumn("BookName"); //书籍名称 DataColumn column4 = new DataColumn("Num"); //数量 DataColumn column5 = new DataColumn("price"); //单价 DataColumn column6 = new DataColumn("totalPrice");//总价 dtTable.Columns.Add(column1); //添加新列 dtTable.Columns.Add(column2); dtTable.Columns.Add(column3); dtTable.Columns.Add(column4); dtTable.Columns.Add(column5); dtTable.Columns.Add(column6); DataRow row; //对数据表中每一行进行遍历,给每一行的新列赋值 foreach (object key in hashCar.Keys) { row = dtTable.NewRow(); row["BookID"] = key.ToString(); row["Num"] = hashCar[key].ToString(); dtTable.Rows.Add(row); } //计算价格 DataTable dstable; int i = 1; float price;//商品单价 int count; //商品数量 float totalPrice = 0; //商品总价格 foreach (DataRow drRow in dtTable.Rows) { strSql = "select BookName,HotPrice from tb_BookInfo where BookID=" + Convert.ToInt32(drRow["BookID"].ToString()); dstable = dbObj.GetDataSetStr(strSql, "tbGI"); drRow["No"] = i;//序号 drRow["BookName"] = dstable.Rows[0][0].ToString();//书籍名称 drRow["price"] = (dstable.Rows[0][1].ToString());//单价 price = float.Parse(dstable.Rows[0][1].ToString());//单价 count = Int32.Parse(drRow["Num"].ToString()); drRow["totalPrice"] = price * count; //总价 totalPrice += price * count; //计算合价 i++; } this.labTotalPrice.Text = "总价:" + totalPrice.ToString(); //显示所有商品的价格 this.gvShopCart.DataSource = dtTable.DefaultView; //绑定GridView控件 this.gvShopCart.DataKeyNames=new string[] {"BookID"}; this.gvShopCart.DataBind(); } } } protected void lnkbtnUpdate_Click(object sender, EventArgs e) { hashCar = (Hashtable)Session["ShopCart"]; //获取其购物车 //使用foreach语句,遍历更新购物车中的商品数量 foreach (GridViewRow gvr in this.gvShopCart.Rows) { TextBox otb = (TextBox)gvr.FindControl("txtNum"); //找到用来输入数量的TextBox控件 int count = Int32.Parse(otb.Text);//获得用户输入的数量值 string BookID = gvr.Cells[1].Text;//得到该商品的ID代 hashCar[BookID] = count;//更新hashTable表 } Session["ShopCart"] = hashCar;//更新购物车 Response.Redirect("shopCart.aspx"); } protected void lnkbtnDelete_Command(object sender, CommandEventArgs e) { hashCar = (Hashtable)Session["ShopCart"];//获取其购物车 //从Hashtable表中,将指定的商品从购物车中移除,其中,删除按钮(lnkbtnDelete)的CommandArgument参数值为商品ID代号 hashCar.Remove(e.CommandArgument); Session["ShopCart"] = hashCar; //更新购物车 Response.Redirect("shopCart.aspx"); } protected void lnkbtnClear_Click(object sender, EventArgs e) { Session["ShopCart"] =null; Response.Redirect("shopCart.aspx"); } protected void lnkbtnContinue_Click(object sender, EventArgs e) { Response.Redirect("Default.aspx"); } protected void lnkbtnCheck_Click(object sender, EventArgs e) { Response.Redirect("checkOut.aspx"); } protected void gvShopCart_PageIndexChanging(object sender, GridViewPageEventArgs e) { gvShopCart.PageIndex = e.NewPageIndex; bind(); } protected void txtNum_TextChanged(object sender, EventArgs e) { hashCar = (Hashtable)Session["ShopCart"]; //获取其购物车 foreach (GridViewRow gvr in this.gvShopCart.Rows) { TextBox otb = (TextBox)gvr.FindControl("txtNum"); //找到用来输入数量的TextBox控件 int count = Int32.Parse(otb.Text);//获得用户输入的数量值 string BookID = gvr.Cells[1].Text;//得到该商品的ID代 hashCar[BookID] = count;//更新hashTable表 } Session["ShopCart"] = hashCar;//更新购物车 bind(); } //shopcart.aspx
|
|
|
|
|
以上是“如何利用Session对象实现购物车”这篇文章的所有内容,感谢各位的阅读!希望分享的内容对大家有帮助,更多相关知识,欢迎关注创新互联行业资讯频道!
网站栏目:如何利用Session对象实现购物车
转载注明:http://pwwzsj.com/article/iecsej.html