asp.net method for realizing shopping cart based on hashtable-practical skills

This article illustrates the ASP.NET approach to implementing a shopping cart based on Hashtable. Share to everyone for your reference, specific as follows:

If the user buys the product if (e.commandname.tolower () = = "buy") {//judge whether the user shopping cart is empty if empty then assign a Hashtable table;
 if (session["car"] = = null) {table = new Hashtable ();
 else {//the user's cart already exists then remove the data table = session["Car"] as Hashtable; ///If the user does not include the product information in the cart, add a new product if (!table. Contains (e.commandargument)) {table. Add (e.commandargument, 1);//Adding a new product quantity of 1} else {//if the cart already exists this product information will add the quantity of the goods to 1 according to the Hashtable key to get the corresponding value int count = Conv Ert. ToInt32 (Table[e.commandargument].
  ToString ());
 Add 1 table[e.commandargument to the quantity of the commodity] = (count + 1);
 //Save commodity information session["car" = table;
Response.Redirect ("shoppingcar.aspx");
  }//commodity information list private void Shoplist () {Hashtable table;
  if (session["car"] = = null) {table = new Hashtable ();
  else {table = session["Car"] as Hashtable; } if (table.
   Count = = 0) {image13.visible = true;
   Msg.visible = true; Msg.text = "<b style=" color:red mce_style= "color:red" > You haven't shopped yet?
  Hurry up and go shopping!</b> "; } string[] Arrkey = new string[table.
  Count]; int[] Arrval = new int[table.
  Count]; Table.
  Keys.copyto (Arrkey, 0); Table.
  Values.copyto (arrval, 0);
  Define string Formation (' 1,2,3 ') string products = "(');
  int k = 0;
   for (int j = 0; J < Arrkey.length J + +) {if (k>0) products = = "', '"; k++; Products + + Arrkey.getvalue (j).
  ToString ();
  Products + = "')"; DataSet ds = Productbll.
  Getinfobywhere ("pid in" + products);
  DataTable Table1 = new DataTable (); Table1 = ds.
  Tables[0];
  TABLE1.COLUMNS.ADD (New DataColumn ("Shuliang", System.Type.GetType ("System.Int32"));
  Gets the value of the PID and sets it to the Table1 primary key datacolumn[] keys = {table1.columns["pid"};
  Table1.primarykey = keys; foreach (string key in table.) Keys) {Table1.Rows.Find (key) ["Shuliang"] = table[key];//Gets the number of value items based on the key} Table1.Columns.Add (New DataColumn ("Zongji
  A ", System.Type.GetType (" System.Double ")," Hotprice*shuliang "));
  for (int n = 0; n < Table1.Rows.Count n++) {tprice +=convert.todouble (table1.rows[n]["Zongjia"]); } Label1.Text =Tprice.tostring ();
  session["Total"] = Label1.Text.ToString ();
  Mygrid.datasource = Table1.defaultview;
Mygrid.databind ();
  #region Remove a product information from the cart protected void Mygrid_rowcommand (object sender, Gridviewcommandeventargs e) {Hashtable table;
  if (session["car"] = = null) {table = new Hashtable ();
  else {table = session["Car"] as Hashtable; If you click the Delete button, remove the product information from the shopping cart if (e.commandname.tolower () = "Delete") {if table. ContainsKey (e.commandargument)) {//Remove the item's information (item number) key from the Hashtable: The item number value is: Quantity table.
   Remove (e.commandargument);
  } Msg.text = (string) e.commandargument;
  } session["Car" = table;
Call Method Shoplist ();

 } #endregion

I hope this article will help you with ASP.net programming.