DataGridViewCellCollection.CollectionChanged Event
Definition
Important
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Occurs when the collection is changed.
public:
event System::ComponentModel::CollectionChangeEventHandler ^ CollectionChanged;public event System.ComponentModel.CollectionChangeEventHandler CollectionChanged;public event System.ComponentModel.CollectionChangeEventHandler? CollectionChanged;member this.CollectionChanged : System.ComponentModel.CollectionChangeEventHandler Public Custom Event CollectionChanged As CollectionChangeEventHandler Event Type
Examples
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the CollectionChanged event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.
To run the example code, paste it into a project that contains an instance of type DataGridViewCellCollection named DataGridViewCellCollection1. Then ensure that the event handler is associated with the CollectionChanged event.
private void DataGridViewCellCollection1_CollectionChanged(Object sender, CollectionChangeEventArgs e) {
System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Action", e.Action );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Element", e.Element );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "CollectionChanged Event" );
}
Private Sub DataGridViewCellCollection1_CollectionChanged(sender as Object, e as CollectionChangeEventArgs) _
Handles DataGridViewCellCollection1.CollectionChanged
Dim messageBoxVB as New System.Text.StringBuilder()
messageBoxVB.AppendFormat("{0} = {1}", "Action", e.Action)
messageBoxVB.AppendLine()
messageBoxVB.AppendFormat("{0} = {1}", "Element", e.Element)
messageBoxVB.AppendLine()
MessageBox.Show(messageBoxVB.ToString(),"CollectionChanged Event")
End Sub
