A self-written Asp.net-Cookies shopping cart class

Write your ownASP. Net cookies shopping cart class, to achieve the shopping cart function, to achieve the shopping without registration

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;

//ArticleSource: http://study.pctoday.net.cn/2_ASP.net.aspx

Public class cookieshoppingcart

{

/// <Summary>

/// Add to shopping cart

/// </Summary>

/// <Param name = "productid"> </param>

/// <Param name = "quantity"> </param>

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 3 hours

Ocookie. expires = datetime. Now. addyears (3 );

Ocookie. value = productid. tostring () + ":" + quantity. tostring () + ":" + box. tostring ();

Httpcontext. Current. response. Cookies. Add (ocookie );

}

// If the cookie already exists

Else

{

Bool bexists = false;

Httpcookie ocookie = (httpcookie) httpcontext. Current. Request. Cookies ["shoppingcart"];

Ocookie. expires = datetime. Now. addyears (3 );

String shoppingcartstr = ocookie. value. tostring ();

String [] arrcookie = shoppingcartstr. Split (New char [] {','});

// Check whether the product exists in the cookie

String newcookie = "";

For (INT I = 0; 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 (':') + 1); // obtain the quantity

Oldquantity = oldquantity. Remove (oldquantity. lastindexof (":"));

Oldquantity = (convert. toint32 (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 (':') + "already exists! Quantity: "+ oldquantity +" <br> ");

// Httpcontext. Current. response. Write (arrcookie [I] + "<br> ");

}

Newcookie = newcookie + "," + arrcookie [I];

}

// If this product does not exist

If (! Bexists)

{

Ocookie. value = ocookie. Value + "," + productid. tostring () + ":" + quantity. tostring () + ":" + box. tostring ();

}

Else

{

Ocookie. value = newcookie. substring (1 );

}

Httpcontext. Current. response. Cookies. Add (ocookie );

Httpcontext. Current. response. Write ("shoppingcart:" + httpcontext. Current. Request. Cookies ["shoppingcart"]. value );

}

}

/// <Summary>

/// Remove the subitem of the shopping cart

/// </Summary>

/// <Param name = "productid"> </param>

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 (3 );

// Check if cookie already contain same item

String shoppingcartstr = ocookie. value. tostring ();

String [] arrcookie = shoppingcartstr. Split (New char [] {','});

String [] arrcookie2 = new string [arrcookie. Length-1];

Int J = 0;

String newstr = "";

For (INT I = 0; 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 (1 );

}

}

Public static void updateshoppingcart (INT productid, int quantity, bool box)

{

Int box = 1;

If (! Box)

Box = 0;

If (httpcontext. Current. Request. Cookies ["shoppingcart"]! = NULL)

{

Bool bexists = false;

Httpcookie ocookie = (httpcookie) httpcontext. Current. Request. Cookies ["shoppingcart"];

Ocookie. expires = datetime. Now. addyears (3 );

String shoppingcartstr = ocookie. value. tostring ();

String [] arrcookie = shoppingcartstr. Split (New char [] {','});

// Check whether the product exists in the cookie

String newcookie = "";

For (INT I = 0; 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 (1 );

}

}

 

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 (3 );

String shoppingcartstr = ocookie. value. tostring ();

// Httpcontext. Current. response. Write (shoppingcartstr );

String [] arrcookie = shoppingcartstr. Split (New char [] {','});

// Check whether the product exists in the cookie

String newcookie = "";

For (INT I = 0; I <arrcookie. length; I ++)

{

Newcookie = newcookie + "," + arrcookie [I]. Trim (). Remove (arrcookie [I]. indexof (':'));

}

Newcookie = newcookie. substring (1 );

Dt = product. getproductbyproductids (newcookie,-1 );

DT. Columns. Add ("quantity ");

DT. Columns. Add ("box ");

Foreach (datarow row in DT. Rows)

{

For (INT I = 0; I <arrcookie. length; I ++)

{

If (arrcookie [I]. Trim (). Remove (arrcookie [I]. indexof (':') = row ["productid"]. tostring ())

{

Row ["quantity"] = arrcookie [I]. substring (arrcookie [I]. indexof (":") + 1 );

Row ["quantity"] = row ["quantity"]. tostring (). Remove (row ["quantity"]. tostring (). indexof (":"));

String box = arrcookie [I]. substring (arrcookie [I]. lastindexof (":") + 1 );

If (box = "1 ")

Row ["box"] = true;

Else

Row ["box"] = false;

}

}

}

}

Else

{

Dt = database. getdatatable ("select top 0 * From view_productlist ");

DT. Columns. Add ("quantity ");

}

Return DT;

}

}