<%@ Page Language="C#" AutoEventWireup="true" CodeFile="check.aspx.cs" Inherits="check" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style>
h1 {
font-family: 'Lucida Handwriting';
text-align: center;
margin: 50px;
font-size: 50px;
}
.word {
font-family: 'Lucida Handwriting';
margin: 50px;
font-size: 20px;
}
body {
background-image: url("http://3.bp.blogspot.com/-3UIjuTrbAI8/Uihk5uaH_lI/AAAAAAAAAuk/gcn5XlQ9kyI/s640/Top+10+best+Simple+Awesome+Background+Images+for+Your+Website+or+Blog2.jpg");
background-repeat: no-repeat;
background-size: cover;
background-attachment: fixed;
}
.topnav {
overflow: hidden;
background-color: black;
}
.transbox {
margin: 30px;
background-color: white;
border: 0px;
opacity: 0.75;
/*filter: alpha(opacity=50);*/
}
.topnav a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.topnav a:hover {
background-color: burlywood;
color: black;
}
.topnav a.active {
background-color: #4CAF50;
color: white;
}
.topnar a {
float: right;
background-color: black;
display: block;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.topnar a:hover {
background-color: burlywood;
color: black;
}
.txtstyle {
width: 300px;
padding: 12px 20px;
margin: 8px 0;
box-sizing: border-box;
border: 3px solid #ccc;
-webkit-transition: 0.5s;
transition: 0.5s;
outline: none;
}
.txtstyle:focus {
border: 3px solid #555;
}
.btnlogout {
width: 100px;
height: 30px;
font-family:'Lucida Handwriting';
float:right;
}
.auto-style2 {
width: 146px;
}
.auto-style3 {
width: 233px;
}
.auto-style5 {
width: 172px;
}
.auto-style6 {
width: 141px;
}
.auto-style7 {
width: 233px;
height: 26px;
}
.auto-style10 {
width: 141px;
height: 26px;
}
.auto-style11 {
height: 26px;
width: 140px;
}
.auto-style14 {
width: 175px;
}
.auto-style15 {
height: 26px;
width: 175px;
}
.auto-style16 {
height: 26px;
width: 172px;
}
.auto-style17 {
height: 26px;
width: 146px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div class="topnar">
<a href="adminpage.aspx">Manage</a>
<a href="orderlist.aspx">Orderlist</a>
</div>
<div class="topnav">
<a class="active" href="menuhome.aspx">Home</a>
<a href="menuchicken.aspx">Chicken & Fish</a>
<a href="menupasta.aspx">Pasta</a>
<a href="menuwrap.aspx">Sandwich & Wrap</a>
<a href="menuside.aspx">Side Order</a>
<a href="menusoup.aspx">Salad & Soup</a>
</div>
<div>
Order ID :
<asp:TextBox ID="txtorid" runat="server"></asp:TextBox>
Secret Code :
<asp:TextBox ID="txtcode" runat="server"></asp:TextBox>
<asp:Button ID="btncheck" runat="server" Text="Check" OnClick="btncheck_Click" />
<br />
<br />
</div>
<div class="transbox">
Reservation details:
<table border="1">
<tr>
<td class="auto-style7">ID</td>
<td class="auto-style15">Reserved Date</td>
<td class="auto-style11">Reserved Time</td>
<td class="auto-style10">Name</td>
<td class="auto-style11">Handphone</td>
<td class="auto-style17">TableNumber</td>
<td class="auto-style16">Pax</td>
</tr>
<asp:ListView ID="listView" runat="server">
<ItemTemplate>
<tr>
<td><%# Eval("ID") %></td>
<td><%# Eval("Datebook") %></td>
<td><%# Eval("TimeFrom") %></td>
<td><%# Eval("Name") %></td>
<td><%# Eval("Handphone") %></td>
<td><%# Eval("TableNumber") %></td>
<td><%# Eval("Pax") %></td>
</tr>
</ItemTemplate>
</asp:ListView>
</table>
<br />
<br />
Food Ordered:
<table border="1">
<tr>
<td>Food ID</td>
<td>Food Name</td>
<td>Quantity</td>
<td>Price</td>
<td>Total</td>
</tr>
<asp:ListView ID="listView1" runat="server">
<ItemTemplate>
<tr>
<td><%# Eval("productid") %></td>
<td><%# Eval("Foodname") %></td>
<td><%# Eval("quantity") %></td>
<td><%# Eval("price") %></td>
<td><%# Eval("total") %></td>
</tr>
</ItemTemplate>
</asp:ListView>
</table>
</div>
</form>
</body>
</html>
嗨，这是我的代码。我使用子查询来组合我的 SQL语句 中的一些字段，并且在子查询之后我无法获取该值。另外，我收到此错误：
DataBinding：'System.Data.DataRowView'不包含属性 名为'productID'
任何人都知道如何解决它？我检查了所有列名。此sql语句可以在MYSQL数据库中运行，但不能在代码中运行。谢谢！
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using MySql.Data.MySqlClient;
using System.IO;
using System.Text;
using System.Data;
using System.Configuration;
public partial class check : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
MySqlConnection connection = new MySqlConnection();
MySqlCommand cmmd = new MySqlCommand();
connection.ConnectionString = "SERVER=localhost;DATABASE=pf;UID=root;PASSWORD=password;";
connection.Open();
string cmdText = "SELECT * FROM booking where secret = '"+ txtcode.Text + "' and id = '"+ txtorid.Text +"'";
MySqlDataAdapter adapt = new MySqlDataAdapter(cmdText, connection);
DataTable t = new DataTable();
adapt.Fill(t);
listView.DataSource = t;
listView.DataBind();
listView.Visible = true;
connection.Close();
MySqlConnection Conn = new MySqlConnection("Server=localhost;Database=pf;Uid=root;Pwd=password;");
MySqlCommand Command = new MySqlCommand();
Conn.Open();
Command.Connection = Conn;
Command.CommandText = "SELECT productid, (select name from menu where id = productid)as Foodname, price, quantity, price * quantity as total from salesdetail where salesid = (select id from booking where secret = 'ypnok3bd' and id = 'SSD00000000000000001') ";
string productid = Command.ExecuteScalar().ToString();
string Foodname = Command.ExecuteScalar().ToString();
string price = Command.ExecuteScalar().ToString();
string total = Command.ExecuteScalar().ToString();
DataTable d = new DataTable();
adapt.Fill(d);
listView1.DataSource = d;
listView1.DataBind();
listView1.Visible = true;
Conn.Close();
}
protected void btncheck_Click(object sender, EventArgs e)
{
}
}
答案 0 :(得分：2)
我假设您对DataAdapter使用了错误的命令或使用了错误的列。因为您希望在视图中显示ProductID，但另一个SelectCommand会选择该列。您用于适配器的那个使用SELECT * FROM booking，该表的主列是Id。
除此之外，您无法使用ExecuteScalar从选择查询中接收多个不同的列。仅返回第一个记录的第一列。相反，您可以使用DataReader：
Command.CommandText = "SELECT productid, (select name from menu where id = productid)as Foodname, price, quantity, price * quantity as total from salesdetail where salesid = (select id from booking where secret = 'ypnok3bd' and id = 'SSD00000000000000001') ";
using(var rd = Command.ExecuteReader())
{
if(rd.Read())
{
string productid = rd.GetInt32(0).ToString();
string foodname = rd.GetString(1);
string price = rd.GetDecimal(2).ToString();
string total = rd.GetDecimal(3).ToString();
}
}
我已经推测了列的类型。如果出现异常，请相应更改。