How Can I Keep My DataGridView Updated When Using a List?

Maintaining an Up-to-Date DataGridView with a Binding List

When binding a List<T> to a DataGridView, you may encounter a situation where changes to the list are not reflected in the grid view. Understanding the underlying reason and implementing the appropriate solution is crucial.

Problem Explanation

A List<T> does not implement the IBindingList interface, which provides support for data binding and automatic updates. As a result, the DataGridView cannot detect changes made to the list after the initial binding.

Solution

To resolve this issue, bind the DataGridView to a BindingList<T> instead. A BindingList<T> is a data-aware collection that implements the IBindingList interface, allowing it to notify the DataGridView of changes, ensuring that the grid view always displays the latest data.

Binding to a BindingList

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

Additional Recommendation

Consider using a BindingSource to further enhance data binding capabilities. A BindingSource acts as an intermediary between the data source (BindingList<T> in this case) and the DataGridView. It provides additional features such as filtering and sorting, and it simplifies data binding management.

Binding 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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