How to Keep a DataGridView Updated When Binding to a Dynamic List?

How to Display Dynamically Updated Binding List in DataGridView

Introduction

Binding a List to a DataGridView can be a convenient way to display dynamic data. However, updating the list may not always reflect changes in the DataGridView without explicit rebinding.

Problem

Consider a scenario with a List containing two items ("Joe Black" and "Misha Kozlov"). When bound to the DataGridView, these items are displayed. However, adding new items to the list does not update the grid's content.

Solution

Using a BindingList

The DataGridView does not maintain a direct connection to a List. Instead, use a BindingList, which implements IBindingList and notifies the grid of changes.

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

Using a BindingSource

For more granular control, consider using 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;

The BindingSource provides flexibility for data manipulation and binding multiple data sources. Changes to the underlying data are propagated to the grid without explicit rebinding.

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