RowStateChanged Event

Overview

Notifies subscribers when a state of an observable data row changes (for example, from Unchanged to Modified).

Declaration

/// <summary>
/// Row state changed notification
/// IObservableDataRow interface implementation
/// </summary>
public event EventHandler<RowStateChangedEventArgs>? RowStateChanged;

Namespace and Assembly

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

Behavior

• Raised by ObservableDataRow when the corresponding condition occurs.
• If no handlers are attached, raising the event has no side effects.

Usage Example

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

// 2. Create Department observable table
IObservableDataTable departmentObservableDataTable = observableDataSet.AddNewTable("Department");
departmentObservableDataTable.AddColumn("Id", DataTypeNames.INT32);
departmentObservableDataTable.AddColumn("Name", DataTypeNames.STRING);

// 3. Add observable data row to Department observable table
IObservableDataRow departmentObservableDataRow1 = departmentObservableDataTable.AddNewRow();

// 4. Subscribe to the RowStateChanged event of the observable data row
departmentObservableDataRow1.RowStateChanged += DepartmentObservableDataRow1_RowStateChanged;

// 5. Call AcceptChanges method and observe that event was raised and handled
departmentObservableDataRow1.AcceptChanges();

private void DepartmentObservableDataRow1_RowStateChanged(object? sender, RowStateChangedEventArgs e)
{
    // e.OldState is Added
    DataRowState oldState = e.OldState;

    // e.NewState is Unchanged
    DataRowState newState = e.NewState;
}

 

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

 

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Business Process Programming in .Net
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