Question

我一直在与a c# tutorial for beginners to create an address book合作。我按照说明操作，遇到了两个问题。

当我选择Listview框的属性时，SelectedIndexChanged事件丢失。我重新启动并刷新了几次程序。我已直接写入文件，但仍然没有。
从列表中选择联系人时，文本框不会反映所选内容。我怀疑这与ui中缺少SelectedIndexChanged事件有关。即使我在代码中设置了SelectedIndexChanged事件，这种情况仍然存在。

非常感谢所有帮助。我的代码在

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; }
    }
}

Answer 1

您需要单击“属性”窗口中的闪电图标以转到“事件”选项卡在那里，您将看到SelectedIndexChanged事件（假设您选择了正确的控件。

您需要将处理程序绑定到该事件，以便运行代码。

Answer 2

SelectedIndexChanged可能会在“属性”窗口中列为 OnSelectedIndexChanged 。一旦你让事件处理程序工作，就应该按照预期的值填充文本框。

地址簿教程

2 个答案: