DataFieldValueChanged Event

Overview

Occurs when any row in the table changes a field value. Subscribe here when you only care about edits in a specific table (instead of the whole dataset).

Declaration

/// <summary>
/// DataFieldValueChanged event
/// IObservableDataTable interface implementation
/// </summary>
public event EventHandler<DataFieldValueChangedEventArgs>? DataFieldValueChanged;

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 DataFieldValueChanged event
employeeObservableDataTable.DataFieldValueChanged += Employee_DataFieldValueChanged;

// 4. Add a row
IObservableDataRow employeeObservableDataRow = employeeObservableDataTable.AddNewRow();

// Assign value to a data field, which triggers table-level DataFieldValueChanged event
employeeObservableDataRow["Id"] = 1;

// Handles Employee.DataFieldValueChanged event
static void Employee_DataFieldValueChanged(object? sender, DataFieldValueChangedEventArgs e)
{
    Console.WriteLine($"{e.ColumnName} changed to: {e.Value}");
}

 

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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