Question

对于使用c＃和xaml的Windows dev新手。学习抢劫里程＆＃34;蓝皮书＆＃34;对于win8 dev。

我不断收到此错误消息并且卡住了。有人可以帮帮我或给我一些指示。我在阻止我麻烦的区块添加了评论。感谢

using System.Collections.Generic;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using AddingMachine;

namespace AddingMachine
{
    public class Customer
    {
        public string Name { get; set;}

        public string Address{ get; set;}

        public int ID { get; set;}

        public Customer(string inName, string InAddress, int inID)
        {
            Name = inName;
            Address = InAddress;
            ID = inID;
        }
    }

    public class Customers
    {
        public string Name { get; set;}

        public List<Customer> CustomerList;
        public Customers(string inName)
        {
            Name = inName;
            CustomerList = new List<Customer>();
        }
        Customers mailCustomers = new Customers("Mail Order Customers");
        private Customers customerList;

        public static Customers MakeTestCustomers()
        {
            string[] firstNames = new string[] { "Rob", "Jim", "Joe", "Nigel", "Sally", "Tim" };
            string[] lastsNames = new string[] { "Smith", "Jones", "Bloggs", "Miles", "Wilkinson", "Brown"};

            Customers result = new Customers("Test Customers");
            int id = 0; foreach (string lastName in lastsNames)
            {
                foreach (string firstname in firstNames)
                {
                    //Construct a customer name 
                    string name = firstname + " " + lastName;
                    //Add the new customer to the list 
                    result.CustomerList.Add(new Customer(name, name + "'s House", id));
                    // Increase the ID for the next customer 
                    id++;
                }
            }
            return result;

            // THIS IS WHERE I AM HAVING PROBLEM. "customers" object keep showing error msg that it does not exit in the current context.
            customers = Customers.MakeTestCustomers();
            foreach (Customer c in customers.CustomerList)
            {
                TextBlock customerBlock = new TextBlock();
                customerBlock.Text = c.Name;
                customersStackPanel.Children.Add(customerBlock);
                //customers = Customers.MakeTestCustomers(); customerList.ItemsSource = customers.CustomerList;
                //customerList = Customers.MakeTestCustomers();
            }
        }
    }
}

XAML

<Page
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:AddingMachine"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:App1="using:AddingMachine"
    xmlns:App11="using:App1"
    x:Class="AddingMachine.MainPage"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

   <!--<StackPanel x:Name="customersStackPanel" HorizontalAlignment="Left" Margin="9,6,0,0"  VerticalAlignment="Top" ScrollViewer.BringIntoViewOnFocusChange="True"/>-->
    <ListBox Name="customerList"  SelectionChanged="customerList_SelectionChanged">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel x:Name="customersStackPanel" HorizontalAlignment="Left" Margin="9,6,0,0"  VerticalAlignment="Top" ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollMode="Auto">
                    <TextBlock Text="{Binding Name}" 
                               Style="{StaticResource PhoneTextExtraLargeStyle}"/>

                    <TextBlock Text="{Binding Address}" 
                               Style="{StaticResource PhoneTextExtraLargeStyle}"/>
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>


</Page>

Answer 1

书籍可能容易出错，直接从书中复制某些内容可能会让您学到很多东西而不是自己尝试。如果书中有错误，那么这本书是错误的，而不是编译器。这本书不是法律，编译器是。

关于您的实际问题，正如 dcastro 指出的那样，您尚未声明名为customers的变量。也许您打算使用customerList代替。

当您发现错误时，请花一些时间阅读您的代码，并准确了解正在发生的事情。错误消息通常很清楚。

这个代码有什么错误[windos phone 8.1开发] C＃和Xaml

1 个答案: