ObservableDataRow Members

Events

Contract: IObservableDataRow interface in PocoDataSet.IObservableData library
Implementation: ObservableDataRow class in PocoDataSet.ObservableData library

• DataFieldValueChanged
  Raised when a column value changes (typically via the indexer). The event args include the column name and an optional requestor.
• PropertyChanged
  Standard .NET property change notification for binding engines (WPF/WinUI/MAUI, etc.). Raised for column changes and key properties.
• RowStateChanged
  Raised when the row state transitions (for example, from Unchanged to Modified).

Properties

Contract: IObservableDataRow interface in PocoDataSet.IObservableData library
Implementation: ObservableDataRow class in PocoDataSet.ObservableData library

• DataRowState
  Gets the current DataRowState of the inner row. Changes may raise RowStateChanged and PropertyChanged.
• InnerDataRow
  Gets the wrapped IDataRow instance. This is the non-observable row that stores the actual field values and change tracking state.
• Key
  Gets or sets an optional UI-oriented key for the row (commonly used for view models, selection lists, or lookup mapping).
• Selected
  Gets or sets a flag indicating whether the row is selected. Setting this value raises PropertyChanged.

Indexers

Contract: IObservableDataRow interface in PocoDataSet.IObservableData library
Implementation: ObservableDataRow class in PocoDataSet.ObservableData library

• Indexer
  Gets or sets the current field value by column name. Setting a value raises DataFieldValueChanged, PropertyChanged(columnName), PropertyChanged("Item[]"), and may raise RowStateChanged.

Methods

Contract: IObservableDataRow interface in PocoDataSet.IObservableData library
Implementation: ObservableDataRow class in PocoDataSet.ObservableData library

• AcceptChanges
  Accepts the row current values as the new baseline and sets the row state to Unchanged (when applicable).
  If the current state of the row is Detached or Unchanged, the AcceptChanges method does nothing.
  If the current state of the row is Deleted then AcceptChanges method throws an exception because accepting changes means the deleted row must be removed from the table it belongs to, but that action can be done at table level only.
  If the current state of the row is Added or Modified then the AcceptChanges method changes the row's state to Unchanged.
  For Added and Modified rows, AcceptChanges method discards any stored original-value snapshot and makes current values the baseline.
• GetDataFieldValue
  Reads a field value and returns it as a strongly typed value by delegating to the underlying row conversion helpers.
• RejectChanges
  Reverts a row to its baseline (original) values captured by the framework. The method behaves differently depending on the current state of the row.
  If the current state of the row is Detached or Unchanged then RejectChanges method does nothing.
  If the current state of the row is Added, the RejectChanges method throws an exception because "reject changes" means added row needs to be removed from the table it was added to, but that action must be performed at table level.
  If the current state of the row is Deleted or Modified then the RejectChanges method restores row values from the snapshot if it exists and changes the row's state to Unchanged. If no snapshot exists, it still sets state to Unchanged and clears snapshot.
• TryGetOriginalValue
  Allows you to get the baseline (original) value for the specified column from the row’s original-values snapshot, if such a snapshot exists. Original values are captured automatically when an Unchanged row is modified for the first time or when the Delete method is called.

Extension Methods

Implementation: classes in PocoDataSet.ObservableExtensions library

• CopyFrom
  Copies values from another row into an observable row, applying only the values present in the source.
• CopyFromPoco
  Copies values from a POCO object into an observable row by matching property names to column names.
• CopyToPoco
  Copies values from an observable row into an existing POCO object instance (case-insensitive property matching).
• CreateRowFromColumns
  Creates a new observable row instance initialized from a list of column metadata.
• Delete
  Marks an observable row as deleted and raises observable events as appropriate.
• EnumerateValues
  Enumerates current field values as (columnName, value) pairs.
• GetDataFieldValue
  Reads a field value as a strongly typed value (conversion helpers).
• ToPoco
  Creates a detached POCO object and copies values from the observable row into it.
• TryGetFieldKeyByColumnName
  Resolves the actual internal field key used for a given column name (casing helper).
• TryGetValue
  Attempts to read the current field value by column name.

 

Table of Content API References POCO DataSet Observable POCO DataSet Types

 

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Business Process Programming in .Net
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