Binding List to DataGridView in WinForm

Binding List to DataGridView in WinForm

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I have a class

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

and a List<Person> to which I add some items. The list is bound to my 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;

There is no problem. myGrid displays two rows, but when I add new items to my persons list, myGrid does not show new updated list. It only shows the two rows which I added before.

So what is the problem?

Rebinding every time works well. But when I bind a DataTable to the grid when every time when I make some changes to DataTable there is not any need to ReBind myGrid.

How to solve it without rebinding every time?

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List does not implement IBindingList so the grid does not know about your new items.

Bind your DataGridView to a BindingList<T> instead.

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

But I would even go further and bind your grid to a 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;

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Every time you add a new element to the List you need to re-bind your Grid. Something like:

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;

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After adding new item to persons add:

myGrid.DataSource = null;
myGrid.DataSource = persons;

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Yes, it is possible to do with out rebinding by implementing INotifyPropertyChanged Interface.

Pretty Simple example is available here,

http://msdn.microsoft.com/en-us/library/system.componentmodel.inotifypropertychanged.aspx

참고URL : https://stackoverflow.com/questions/16695885/binding-listt-to-datagridview-in-winform