Page 163 - CSharp/C#

Chapter 20: BindingList

Examples

Avoiding N*2 iteration

This is placed in a Windows Forms event handler

var nameList = new BindingList<string>();
ComboBox1.DataSource = nameList;
for(long i = 0; i < 10000; i++ ) {
nameList.AddRange(new [] {"Alice", "Bob", "Carol" });
}

This takes a long time to execute, to fix, do the below:

var nameList = new BindingList<string>();
ComboBox1.DataSource = nameList;
nameList.RaiseListChangedEvents = false;
for(long i = 0; i < 10000; i++ ) {
nameList.AddRange(new [] {"Alice", "Bob", "Carol" });
}
nameList.RaiseListChangedEvents = true;
nameList.ResetBindings();

Add item to list

BindingList<string> listOfUIItems = new BindingList<string>();
listOfUIItems.Add("Alice");
listOfUIItems.Add("Bob");

Read BindingList online: https://riptutorial.com/csharp/topic/182/bindinglist-t-

https://riptutorial.com/ 109