Getting access to the Deleted Rows
Posted: Wednesday, June 09, 2004 2:28 AM
by
datasetfaq
Filed under: Database Access, Typed Datasets, Untyped Datasets
If you Delete a row in a DataTable it's not really gone. It's just in a private buffer thing that hides the data out of the traditional Rows Collection and that works good for databinding and the like. The deleted rows are kept so when you do a DataAdapter.Update() it knows which rows you wanted to delete in the persistent store.
So what if you are writing your own adapter or for other reasons just need to get at the deleted rows. The trick is to create a DataView with a RowState Filter of “Deleted“ and then you can look at the DataRowViews to get individual row/column data.
DataView deleteView =
new DataView(MyDataSet.MyTable, "", "", System.Data.DataViewRowState.Deleted);
foreach (DataRowView drv in deleteView)
{
string someColumnValue = (string)drv["SomeColumn"];
}