更改组合框中的一个项目的文本

Question

我有一个组合框，其中包含一个名称列表：LastName + ", " + FirstName。

当选择一个名称时，它将分别填充两个文本框，分别为名字和姓氏。

我想要做的是，如果名称在文本框中更改，我希望将更改更新为ComboBox，而无需重新加载整个事物。我的组合框不直接从数据库中加载，所以我不能使用RefreshItem()

这是否可能？

Answer 1

您可以实现INotifyPropertyChanged接口并使用BindingSource作为ComboBox的DataContext。请参考下面的示例代码。

Person.cs：

public class Person : INotifyPropertyChanged 
{ 
    private string _firstName; 
    public string FirstName 
    { 
     get { return _firstName; } 
     set { _firstName = value; NotifyPropertyChanged(); } 
    } 

    private string _lastName; 
    public string LastName 
    { 
     get { return _lastName; } 
     set { _lastName = value; NotifyPropertyChanged(); } 
    } 

    public string FullName { get { return LastName + ", " + FirstName; } } 

    public event PropertyChangedEventHandler PropertyChanged; 
    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "") 
    { 
     if (PropertyChanged != null) 
      PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
    } 
} 

Form1.cs中：

public partial class Form1 : Form 
{ 
    public Form1() 
    { 
     InitializeComponent(); 

     List<Person> people = new List<Person>() 
      { 
       new Person() { FirstName = "Donald", LastName = "Duck" }, 
       new Person() { FirstName = "Mickey", LastName = "Mouse" } 
      }; 
     BindingSource bs = new BindingSource(); 
     bs.DataSource = people; 
     comboBox1.DataSource = bs; 
     comboBox1.DisplayMember = "FullName"; 

     textBox1.DataBindings.Add(new Binding("Text", bs, "FirstName", false, DataSourceUpdateMode.OnPropertyChanged)); 
     textBox2.DataBindings.Add(new Binding("Text", bs, "LastName", false, DataSourceUpdateMode.OnPropertyChanged)); 

    } 
}