将List <T>绑定到WinForm中的DataGridView

Question

我上课了

class Person{
      public string Name {get; set;}
      public string Surname {get; set;}
}

和List<Person>我添加一些项目.这个清单绑定了我的DataGridView.

List<Person> persons = new List<Person>();
persons.Add(new Person(){Name="Joe", Surname="Black"});
persons.Add(new Person(){Name="Misha", Surname="Kozlov"});
myGrid.DataSource = persons;

没有问题.myGrid显示两行,但是当我向persons列表中添加新项目时,myGrid不会显示新的更新列表.它只显示我之前添加的两行.

那么问题是什么？

每次重新绑定都很有效.但是当我DataTable每次进行一些更改时都绑定到网格时,DataTable没有任何ReBind需要myGrid.

如何在不重新绑定的情况下解决它？

Answer 1

列表未实现,IBindingList因此网格不知道您的新项目.

将DataGridView绑定到一个BindingList<T>.

var list = new BindingList<Person>(persons);
myGrid.DataSource = list;

但我甚至会进一步将你的网格绑定到一个 BindingSource

var list = new List<Person>()
{
    new Person { Name = "Joe", },
    new Person { Name = "Misha", },
};
var bindingList = new BindingList<Person>(list);
var source = new BindingSource(bindingList, null);
grid.DataSource = source;

Answer 2

每次向列表添加新元素时，都需要重新绑定网格。就像是：

List<Person> persons = new List<Person>();
persons.Add(new Person() { Name = "Joe", Surname = "Black" });
persons.Add(new Person() { Name = "Misha", Surname = "Kozlov" });
dataGridView1.DataSource = persons;

// added a new item
persons.Add(new Person() { Name = "John", Surname = "Doe" });
// bind to the updated source
dataGridView1.DataSource = persons;