Windows Database Applications CIS 341 Chapter 5

Objectives Update database Navigate records Event handler Bound control maintenance Update data source Sequence updates

Data Objects DB (original) Data Adapter Dataset Retrieve Update data Create dataset & save updates

Data Grid Format Data Table (0) Data Rows Collection Data Row (0) Data Row (1) Data Tables Collection Data Set

RowState property DataRowState EnumPurpose AddedIndicated a new row DeletedMarked for deletion DetachedNot part of a collection ModifiedChanges made to row UnchangedOriginal row values

Change Management Edit Methods DataRow Versions AcceptChanges method RejectChanges method

Update Data Adapter Update Method At every change or program termination? Or Combination of techniques Data is a Grid Edit Mode EndEdit and CancelEdit

Menu Options to Update Binding Context BindingManagerBase Data Table 1 Data Table 2 BindingManagerBase Data-bound Form