RowStateChanged Event

Overview

Occurs when a row changes its DataRowState (for example, from Added to Modified or Deleted). Subscribe to this event to drive UI state (dirty indicators, validation banners, etc.).

Declaration

/// <summary>
/// RowStateChanged event
/// IObservableDataTable interface implementation
/// </summary>
public event EventHandler<RowStateChangedEventArgs>? RowStateChanged;

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
IObservableDataTable employeeObservableDataTable = observableDataSet.AddNewTable("Employee");
employeeObservableDataTable.AddColumn("Id", DataTypeNames.INT32);
employeeObservableDataTable.AddColumn("Name", DataTypeNames.STRING);

// 3. Sign up for RowStateChanged event
employeeObservableDataTable.RowStateChanged += Employee_RowStateChanged;

// 3. Add a row
IObservableDataRow employeeObservableDataRow = employeeObservableDataTable.AddNewRow();
employeeObservableDataRow["Id"] = 1;
employeeObservableDataRow["Name"] = "Alice";

// 4. Call AcceptChanges which changes row state from Added to Unchanged and triggers RowStateChanged event
employeeObservableDataRow.AcceptChanges();

// Handles Employee.RowStateChanged event
static void Employee_RowStateChanged(object? sender, RowStateChangedEventArgs e)
{
    Console.WriteLine($"Row state changed: {e.NewState}");
}

 

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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