August 2012
Intermediate to advanced
840 pages
22h 41m
English
Content preview from Visual Basic 2012 Programmer's Reference
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DATAROWVIEW
A DataRow object can hold data for more than one state. For example, if a DataTable row has been modified, its DataRow object contains the row’s original data and the modified values.
A DataRowView object represents a view of a DataRow object in a particular state. That state can be Current (the current value), Default (if columns have defined default values), Original (the original values), or Proposed (new values during an edit before EndEdit or CancelEdit is called).
A DataView object holds DataRowView objects representing a view of a DataTable selecting particular rows in a particular state.
The DataRowView object’s purpose is to represent a row in a specific state so this object is relatively simple. It basically indicates the chosen state and refers to a DataRow.
The following table describes the DataRowView object’s most useful properties.
| PROPERTY | PURPOSE |
| DataView | The DataView that contains the DataRowView. |
| IsEdit | Returns True if the row is in editing mode. |
| IsNew | Returns True if the row is new. |
| Item | Gets or sets the value of one of the row’s fields. |
| Row | The DataRow object that this DataRowView represents. |
| RowVersion | The version of the DataRow represented by this object (Current, Default, Original, or Proposed). |
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