变量解释

litengfei001 2010-04-12 01:41:20

麻烦各位看下 bool P_bool_reVal1 这个是什么意思啊看不懂这里了

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 ShoppingCart : System.Web.UI.Page
{
public static string M_str_Count;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
if (Session["UserID"] != null)

{
//向购物车中添加商品，如果购物车中已经存在该商品，则商品数量加１，如果是第一次购买，则向购物车中添加一条商品信息

string P_str_CartID = Session["UserID"].ToString();

string P_str_GoodsID = Request["GoodsID"];
DataSet ds = DB.reDs("select count(*) from tb_Cart where CartID=" + P_str_CartID + "and GoodsID=" + P_str_GoodsID);
if (ds.Tables[0].Rows[0][0].ToString() == "0")
{

DataSet ds1 = DB.reDs("select GoodsName,GoodsPrice from tb_GoodsInfo where GoodsID=" + P_str_GoodsID);
string P_str_GoodsName = ds1.Tables[0].Rows[0][0].ToString();
string P_str_GoodsPrice = ds1.Tables[0].Rows[0][1].ToString();
string P_str_Num = "1";
DB.ExSql("insert into tb_Cart values(" + P_str_CartID + "," + P_str_GoodsID + ",'" + P_str_GoodsName + "'," + P_str_GoodsPrice + "," + P_str_Num + ")");
}
else
{
DB.ExSql("update tb_Cart set Num=Num+1 where CartID=" + P_str_CartID + "and GoodsID=" + P_str_GoodsID);
}

//显示购物车中的商品信息
Bind();
}
}
//绑定DataList控件
public void Bind()
{
DataSet ds2 = DB.reDs("select *,GoodsPrice*Num As Count from tb_Cart where CartID=" + Session["UserID"]);
float P_fl_Count = 0;
foreach (DataRow dr in ds2.Tables[0].Rows)
{
P_fl_Count += Convert.ToSingle(dr[6]);
}
M_str_Count = P_fl_Count.ToString();
dlShoppingCart.DataSource = ds2;
dlShoppingCart.DataBind();
}

protected void dlShoppingCart_ItemDataBound(object sender, DataListItemEventArgs e)
{
//用来实现数量文本框中只能输入数字
TextBox txtGoodsNum = (TextBox)e.Item.FindControl("txtGoodsNum");
if (txtGoodsNum != null)
{
txtGoodsNum.Attributes["onkeyup"] = "value=value.replace(/[^\\d]/g,'')";
}

}
//清空购物车
protected void lnkbtnClear_Click(object sender, EventArgs e)
{
bool P_bool_reVal = DB.ExSql("Delete from tb_Cart where CartID=" + Session["UserID"]);
if (!P_bool_reVal)
Response.Write("<script>清空失败，请重试！</script>");
else
Bind();
}
//清空购物车时的提示信息
protected void lnkbtnClear_Load(object sender, EventArgs e)
{
lnkbtnClear.Attributes["onclick"] = "javascript:return confirm('你确定要清空购物车吗？')";
}
//继续购物
protected void lnkbtnContinue_Click(object sender, EventArgs e)
{
Response.Redirect("~/Default.aspx");
}
//删除购物车中的商品
protected void dlShoppingCart_DeleteCommand(object source, DataListCommandEventArgs e)
{
bool P_bool_reVal = DB.ExSql("Delete from tb_Cart where CartID=" + Session["UserID"] + " and GoodsID=" + e.CommandArgument.ToString());
if (!P_bool_reVal)
Response.Write("<script>删除失败，请重试！</script>");
else
Bind();
}
//删除购物车中的商品时的提示信息
protected void lnkbtnDel_Load(object sender, EventArgs e)
{
((LinkButton)sender).Attributes["onclick"] = "javascript:return confirm('你确定要删除该物品吗？')";
}
//更新购物车
protected void dlShoppingCart_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "updateNum")
{
string P_str_Num = ((TextBox)e.Item.FindControl("txtGoodsNum")).Text;
bool P_bool_reVal = DB.ExSql("update tb_Cart set Num=" + P_str_Num + "where CartID=" + Session["UserID"] + "and GoodsID=" + e.CommandArgument.ToString());
if (P_bool_reVal)
Bind();
}
}
protected void lnkbtnSettleAccounts_Click(object sender, EventArgs e)
{
if (M_str_Count == "")
{
Response.Write("<script>alert('您的购物车中没有任何物品!');</script>");
}
else
if (Session["UserID"] != null)
{
DataSet ds = DB.reDs("select Money from tb_User where UserID=" + Session["UserID"].ToString());
decimal P_str_Money = Convert.ToDecimal(ds.Tables[0].Rows[0][0].ToString());
if (P_str_Money < Convert.ToDecimal(M_str_Count))
{
Response.Write("<script>alert('您的余额不足，请重新充值后再购买！');</script>");
}
else
{
bool P_bool_reVal1 = DB.ExSql("Delete from tb_Cart where CartID=" + Session["UserID"]);
bool P_bool_reval2 = DB.ExSql("update tb_User set Money=Money-" + M_str_Count + " where UserID=" + Session["UserID"]);
if (!P_bool_reVal1 & !P_bool_reval2)
{
Response.Write("<script>结账失败，请重试！</script>");
}
else
{
Bind();
//Response.Redirect("SuccessShop.aspx");
Response.Write("<script>window.open('SuccessShop.aspx','','Width=300px;Height=250px;status=no;help=no;scrollbars=no');</script>");
}
}
}
}
protected void dlShoppingCart_SelectedIndexChanged(object sender, EventArgs e)
{

}
}

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