在C#中将空项添加到自定义对象的下拉列表中

public class CustomObject
{
    public int Id { get; set; }
    public string Name { get; set; }
}

List<CustomObject> customObjects = new List<CustomObject>
{
    new CustomObject { Id = 0, Name = "" },
    new CustomObject { Id = 1, Name = "Object 1" },
    new CustomObject { Id = 2, Name = "Object 2" },
    new CustomObject { Id = 3, Name = "Object 3" }
};

// 使用WinForms
comboBox.DataSource = customObjects;
comboBox.DisplayMember = "Name";
comboBox.ValueMember = "Id";

// 使用WPF
comboBox.ItemsSource = customObjects;
comboBox.DisplayMemberPath = "Name";
comboBox.SelectedValuePath = "Id";