我一直在为初学者使用 ac# 教程来创建地址簿。我按照说明进行操作，遇到了两个问题。
当我选择 Listview 框的属性时，缺少SelectedIndexChanged事件。我已经重新启动并刷新了几次程序。我已直接写入该文件，但它仍然不存在。
从列表中选择联系人时，文本框不反映选择。我怀疑这与 ui 中缺少SelectedIndexChanged事件有关。即使我在代码中设置SelectedIndexChanged事件，这种情况仍然存在。
所有帮助将不胜感激。我的代码如下
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Web;
namespace AddressBook
{
public partial class AddressBook : Form
{
public AddressBook()
{
InitializeComponent();
}
List<Person> people = new List<Person>();
private void AddressBook_Load(object sender, EventArgs e)
{
string path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
if (!Directory.Exists(path + "\\Address Book - Joe"))
Directory.CreateDirectory(path + "\\Address Book - Joe");
if (!File.Exists(path + "\\Address Book - Joe\\settings.xml"))
File.Create((path + "\\Address Book - Joe\\settings.xml"));
}
private void btnAdd_Click(object sender, EventArgs e)
{
Person p = new Person();
p.FirstName = txtFName.Text;
p.Address = txtAddress.Text;
p.City = txtCity.Text;
p.State = comboState.Text;
p.ZipCode = txtZip.Text;
p.Email = txtEmail.Text;
p.PhoneNumber = txtPhone.Text;
p.Additional = rtxtAdd.Text;
people.Add(p);
listView1.Items.Add(p.FirstName);
txtFName.Text = "";
txtAddress.Text = "";
txtCity.Text = "";
comboState.Text = "";
txtZip.Text = "";
txtEmail.Text = "";
txtPhone.Text = "";
rtxtAdd.Text = "";
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
txtFName.Text = people[listView1.SelectedItems[0].Index].FirstName;
txtAddress.Text = people[listView1.SelectedItems[0].Index].Address;
txtCity.Text = people[listView1.SelectedItems[0].Index].City;
comboState.Text = people[listView1.SelectedItems[0].Index].State;
txtZip.Text = people[listView1.SelectedItems[0].Index].ZipCode;
txtEmail.Text = people[listView1.SelectedItems[0].Index].Email;
txtPhone.Text = people[listView1.SelectedItems[0].Index].PhoneNumber;
txtZip.Text = people[listView1.SelectedItems[0].Index].ZipCode;
rtxtAdd.Text = people[listView1.SelectedItems[0].Index].Additional;
}
private void txtFName_TextChanged(object sender, EventArgs e)
{
}
}
public class Person
{
public string FirstName { get; set; }
public string Address { get; set; }
public string City { get; set; }
public string State { get; set; }
public string ZipCode { get; set; }
public string PhoneNumber { get; set; }
public string Email { get; set; }
public string Additional { get; set; }
}
}