购物车的实现
--数据库访问类
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;
using System.Data.SqlClient;
///
/// ConBase 的摘要说明
///
public class ConBase
{
public SqlConnection objSqlConnection = null;
public SqlCommand objSqlCommand = null;
public SqlDataAdapter objSqlDataAdapter = null;
public SqlDataReader objSqlDataReader = null;
public DataSet objDataSet = null;
public ConBase()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
public void getCon()
{
string strConn = ConfigurationManager.AppSettings["StrCon"].ToString();
objSqlConnection = new SqlConnection(strConn);
objSqlDataAdapter = new SqlDataAdapter();
objSqlConnection.Open();
}
///
/// 查询结果
///
/// sql语句
/// 1和2
/// 表名
///
public object searchData(string sql, int type, string tableName)
{
if (objSqlConnection == null)
{
getCon();
}
try
{
objSqlDataAdapter.SelectCommand = new SqlCommand(sql, objSqlConnection);
if (type == 1)
{
objDataSet = new DataSet();
objSqlDataAdapter.Fill(objDataSet, tableName);
return objDataSet;
}
else if (type == 2)
{
objSqlDataReader = objSqlDataAdapter.SelectCommand.ExecuteReader();
return objSqlDataReader;
}
}
catch (Exception ce)
{
dispose();
throw ce;
}
return null;
}
//增加，修改，删除数据的方法
public void updateData(string sql)
{
if (objSqlConnection == null)
{
getCon();
}
try
{
objSqlCommand = new SqlCommand(sql, objSqlConnection);
objSqlCommand.ExecuteNonQuery();
}
catch (Exception ce)
{
dispose();
throw ce;
}
}
//消毁的方法
public void dispose()
{
if (objSqlConnection != null)
{
if (objSqlConnection.State == ConnectionState.Open)
{
if (objSqlDataReader != null)
{
objSqlDataReader.Close();
}
objSqlConnection.Close();
}
}
GC.SuppressFinalize(true);
}
}
---------------------------------------------------起启页类
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;
public partial class _Default : System.Web.UI.Page
{
comm objcomm = new comm();
DataSet objDataSet = null;
public static DataTable table = null;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
if (Session["CartTable"] == null)
{
createCart();
}
this.objDataSet = objcomm.getGoodsInfo();
BindData();
}
}
//绑定数据的方法
public void BindData()
{
this.dg.DataSource = objDataSet;
this.dg.DataBind();
}
//创建购物车
public void createCart()
{
objDataSet = new DataSet();
table = new DataTable("CartTable");
this.objDataSet.Tables.Add(table);
DataColumn newColumn ;
newColumn = new DataColumn("GoodId", System.Type.GetType("System.Int32"));
table.Columns.Add(newColumn);
newColumn = new DataColumn("GoodsName", System.Type.GetType("System.String"));
table.Columns.Add(newColumn);
newColumn = new DataColumn("GoodsPrice", System.Type.GetType("System.Decimal"));
table.Columns.Add(newColumn);
newColumn = new DataColumn("GoodsQuantity", System.Type.GetType("System.Int32"));
table.Columns.Add(newColumn);
}
//放入购物车的按钮事件
protected void BtnSelect_Click(object sender, EventArgs e)
{
}
protected void dg_SelectedIndexChanged(object sender, EventArgs e)
{
int GoodId = int.Parse(dg.SelectedItem.Cells[0].Text);
string GoodsName = dg.SelectedItem.Cells[1].Text;
decimal GoodsPrice = decimal.Parse(dg.SelectedItem.Cells[2].Text);
int GoodsQuantity = int.Parse(dg.SelectedItem.Cells[3].Text);
// int GoodsQuantity = int.Parse(table.Rows[dg.SelectedIndex][3].ToString());
// Response.Write(dg.SelectedItem.Cells[1].Text.ToString());
bool isFlag = true;
for (int i = 0; i < table.Rows.Count; i++)
{
//如果有些商品 ++ 数量
if (table.Rows[i][0].ToString().Equals(GoodId.ToString()))
{
foreach (DataRow rows in table.Rows)
{
if (rows[0].Equals(dg.SelectedItem.Cells[0].Text))
{
GoodsQuantity = int.Parse(rows[3].ToString());
//Response.Write(" 中 " + GoodsQuantity);
break;
}
}
table.Rows[i][3] = GoodsQuantity + int.Parse(dg.SelectedItem.Cells[3].Text);
isFlag = false;
}
}
if (isFlag)
{
// 添加新行
DataRow newDR = table.NewRow();
newDR["GoodId"] = GoodId;
newDR["GoodsName"] = GoodsName;
newDR["GoodsPrice"] = GoodsPrice;
newDR["GoodsQuantity"] = GoodsQuantity;
table.Rows.Add(newDR);
}
// 保存到Session中
table.AcceptChanges();
Session["CartTable"] = table;
}
protected void btnLook_Click(object sender, EventArgs e)
{
Response.Redirect("ShoopingCart.aspx");
}
}
---------------------------------------------------
购物管理类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;
public partial class ShoopingCart : System.Web.UI.Page
{
DataTable table = null;
protected void Page_Load(object sender, EventArgs e)
{
table = (DataTable)Session["CartTable"];
if (!Page.IsPostBack)
{
if (table != null)
{
BindData();
}
}
}
// 绑定数据的方法
public void BindData()
{
this.dgc.DataSource = table.DefaultView;
this.dgc.DataBind();
}
protected void BtnContinue_Click(object sender, EventArgs e)
{
Response.Redirect("Default.aspx");
}
//删除的事件
protected void dgc_DeleteCommand(object source, DataGridCommandEventArgs e)
{
DataRow[] rows = table.Select("GoodId= "+int.Parse(table.Rows[e.Item.ItemIndex][0].ToString()));
DataRow row = rows[0];
table.Rows.Remove(row);
table.AcceptChanges();
//删除后已经没有数据了
this.dgc.CurrentPageIndex = 0;
BindData();
}
//编辑按钮的事件
protected void dgc_EditCommand(object source, DataGridCommandEventArgs e)
{
this.dgc.EditItemIndex = e.Item.ItemIndex;
BindData();
}
protected void dgc_CancelCommand(object source, DataGridCommandEventArgs e)
{
this.dgc.EditItemIndex = -1;
BindData();
}
protected void dgc_UpdateCommand(object source, DataGridCommandEventArgs e)
{
int count=int.Parse(((TextBox)e.Item.FindControl("tex")).Text);
table.Rows[(dgc.CurrentPageIndex*2)+e.Item.ItemIndex][3] =count;
Session["CartTable"] = table;
this.dgc.EditItemIndex = -1;
BindData();
}
protected void dgc_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
{
this.dgc.CurrentPageIndex = e.NewPageIndex;
BindData();
}
protected void dgc_ItemDataBound(object sender,DataGridItemEventArgs e)
{
// 计算出来的总价啊！
decimal sum = 0;
Decimal price = 0 ;
int num = 0 ;
for (int i = 0; i < table.Rows.Count; i++)
{
price = Decimal.Parse(table.Rows[i][2].ToString());
num = int.Parse(table.Rows[i][3].ToString());
sum += price * num;
}
Label1.Text = sum.ToString() + "元";
}
protected void dgc_ItemCommand(object source, DataGridCommandEventArgs e)
{
}
}