C# 从客户 ID 中删除客户

Question

您好，我想知道是否可以在我的 customer.cs 中创建一个方法来根据其 ID 删除客户。我希望它如何工作是用户将从仅显示客户名字的列表框中选择一个客户，然后点击删除，这会将客户从列表框中删除。但我想以某种方式在 customer.cs 中创建一个方法，该方法将查看 ID，然后在正确的情况下将其删除。这可以做到吗？任何帮助都会创建谢谢。

form.cs:

public partial class AddCustomer : Form
{

    List<Customer> list = new List<Customer>();
    Random rand = new Random();


    public AddCustomer()
    {
        InitializeComponent();


    }

   // Adds Customer
    private void buttonAddCustomer_Click(object sender, EventArgs e)
    {
  
        Customer customer = new Customer();
        customer.customerId = rand.Next();
        customer.firstName = textBoxfn.Text;

        list.Add(customer);
        listBoxCustomers.Items.Add(customer.firstName);


    }

    // Deletes Customer
    private void buttonDeleteCustomer_Click(object sender, EventArgs e)
    {
        listBoxCustomers.Items.Remove(listBoxCustomers.SelectedItem);

   
    }
  }
 }

客户.cs：

 public class Customer
  {
    public int customerId;
    public string firstName;
    public string lastName;
    public string phoneNumber;
    public string address;

    public string FirstName
    {
        get { return firstName; }
        set { firstName = value; }
    }

    public string LastName
    {
        get { return lastName; }
        set { lastName = value; }
    }

    public string PhoneNumber
    {
        get { return phoneNumber; }
        set { phoneNumber = value; }
    }

    public string Address
    {
        get { return address; }
        set { address = value; }
    }

 }
}

Answer 1

一个想法是将您的客户列表加载到BindingList<Customer>

现在使用这种方法，您可以使用 BindingList 和 ListBox 的选定索引。

我使用了一个预定义的客户类别。

public class Customer
{
    public int CustomerIdentifier { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Street { get; set; }
    public string City { get; set; }
    public string PostalCode { get; set; }
    public int CountryIdentifier { get; set; }

    public override string ToString() => $"{FirstName} {LastName}";
}

模拟数据

public class MockedData
{
    public static List<Customer> Customers() => new List<Customer>()
    {
        new Customer()
        {
            CustomerIdentifier = 1, FirstName = "Jim", LastName = "Adams",
            Street = "120 Hanover Sq.", City = "London", PostalCode = "WA1 1DP", 
            CountryIdentifier = 19
        },
        new Customer()
        {
            CustomerIdentifier = 2, FirstName = "Mary", LastName = "Adams",
            Street = "1 rue Alsace-Lorraine", City = "Toulouse", PostalCode = "31000", 
            CountryIdentifier = 8
        },
        new Customer()
        {
            CustomerIdentifier = 3, FirstName = "Karen", LastName = "White",
            Street = "120 Hanover Sq.", City = "London", PostalCode = "WA1 1DP", 
            CountryIdentifier = 19
        }
    };
}

表单代码

public partial class Form1 : Form
{
    private readonly BindingList<Customer> _customersBindingList;
    public Form1()
    {
        InitializeComponent();

        _customersBindingList = new BindingList<Customer>(MockedData.Customers());
        listBoxCustomers.DataSource = _customersBindingList;
    }

    private void RemoveCurrentButton_Click(object sender, EventArgs e)
    {
        if (listBoxCustomers.SelectedIndex > -1)
        {
            _customersBindingList.RemoveAt(listBoxCustomers.SelectedIndex);
        }

        RemoveCurrentButton.Enabled = listBoxCustomers.SelectedIndex > -1;
    }
}

Answer 2

这是删除所有具有特定 id 的客户的功能：

private void RemoveCustomer(int id)
{
    list.RemoveAll(c => c.customerId == id);
}