CollectionChanged Event

Overview

Standard .NET collection change notification when rows are added or removed, which makes the table suitable for UI list binding.

Declaration

/// <summary>
/// Standard .NET collection change notification (rows added or removed)
/// INotifyCollectionChanged interface implementation
/// </summary>
public event NotifyCollectionChangedEventHandler? CollectionChanged;

Namespace and Assembly

Namespace: PocoDataSet.ObservableData
Assembly: PocoDataSet.ObservableData.dll

Usage Example

// 1. Create observable dataset
IObservableDataSet observableDataSet = new ObservableDataSet();

// 2. Create Employee observable data table and sign up for CollectionChanged event
IObservableDataTable employeeObservableDataTable = observableDataSet.AddNewTable("Employee");
employeeObservableDataTable.AddColumn("Id", DataTypeNames.INT32);
employeeObservableDataTable.AddColumn("Name", DataTypeNames.STRING);

employeeObservableDataTable.CollectionChanged += Employee_CollectionChanged;

// 3. Add a row, which triggers CollectionChanged event
IObservableDataRow employeeObservableDataRow = employeeObservableDataTable.AddNewRow();

// Handles Employee.CollectionChanged event
static void Employee_CollectionChanged(object? sender, NotifyCollectionChangedEventArgs e)
{
    Console.WriteLine("Collection change action: " + e.Action);
}

 

Table of Content POCO DataSet API References ObservablePOCO DataSet Types ObservableDataTable Members

 

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Business Process Programming in .Net
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