AcceptChanges Method

Overview

The AcceptChanges method accepts changes for all rows in a table. It is the table-level equivalent of committing the current in-memory state as the new baseline.

A key difference compared to row-level acceptance is how deletions are handled: when a row is in Deleted state, accepting that deletion removes the row from the table. For this reason, this method iterates rows from the end to the beginning and removes deleted rows safely by index.

Declaration

/// <summary>
/// Accepts changes for observable table (delegates to inner table)
/// </summary>
/// <param name="observableDataTable">Observable data table</param>
public static void AcceptChanges(this IObservableDataTable? dataTable)

Namespace and Assembly

Namespace: PocoDataSet.ObservableExtensions
Assembly: PocoDataSet.ObservableExtensions.dll

Behavior

• If dataTable is null, returns immediately.
• Iterates rows from Rows.Count - 1 down to 0. This backward iteration is required because accepting a deletion removes the row from the table.
• For each row:
  • Deleted: the method commits the deletion by removing the row from the table via RemoveRowAt(index).
  • Added and Modified: the method calls IDataRow.AcceptChanges(), which typically transitions the row to Unchanged.
  • Unchanged and Detached: no action is taken.

Important Notes

• Accepting changes is a local operation. It does not save to a database.
• If you call AcceptChanges while there are unsaved deleted rows, those rows will be permanently removed from the table (in-memory). The caller must understand and accept this consequence.

Usage Example

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

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

// Row in Added state
IObservableDataRow departmentObservableDataRow = departmentObservableDataTable.AddNewRow();
departmentObservableDataRow["Id"] = 1;
departmentObservableDataRow["Name"] = "Reception";

// Row in Deleted state
departmentObservableDataRow = departmentObservableDataTable.AddNewRow();
departmentObservableDataRow["Id"] = 2;
departmentObservableDataRow["Name"] = "Emergency";
departmentObservableDataRow.AcceptChanges();
departmentObservableDataRow.Delete();

// Row in Modified state
departmentObservableDataRow = departmentObservableDataTable.AddNewRow();
departmentObservableDataRow["Id"] = 3;
departmentObservableDataRow["Name"] = "Emergency";
departmentObservableDataRow.AcceptChanges();
departmentObservableDataRow["Name"] = "Finance";

// 4. Accept changes at table level
// - row1 remains in the table and becomes Unchanged
// - row2 is removed from the table because it was Deleted
// - row3 remains in the table and becomes Unchanged
departmentObservableDataTable.AcceptChanges();

 

Table of Content POCO DataSet Observable Data Table Members

 

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Business Process Programming in .Net
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