... records.
[ Team LiB ]
[ Team LiB ]
Recipe 4.10 Updating a DataSet with a Many-to-Many Relationship
Problem
You have a DataSet that contains two tables that have a many-to-many relationship ... called to update the changes made to the DataSet with the
data source.
Refresh Button.Click
This event handler clears all data from the DataSet. LoadData( ) is...
... set of data.
The solution shows three ways to synchronize a DataSet with an XmlDataDocument:
Method 1
Populate a DataSet with both schema and data. Synchronize it with a new
XmlDataDocument, ...
XmlDataDocument, initializing it with the DataSet in the constructor.
Method 2
Populate a DataSet with a schema but no data. Synchronize it with a new
XmlDataDo...
...
da.RowUpdating += new SqlRowUpdatingEventHandler(da_RowUpdating);
// Create table and fill with orders schema and data.
dt = new DataTable(CATEGORIES_TABLE);
da.FillSchema(dt, SchemaType.Source); ... DataAdapter update of the row.
e.Status = UpdateStatus.SkipCurrentRow;
}
Discussion
When a DataAdapter is used to update the data source with changes made to
disconnected data...
... tables.
UpdateOrders( )
Takes a DataSet argument containing the changes made to the DataSet created by
the LoadOrders( ) method, creates two DataAdapter objects with
CommandBuilder generated ...
Use a DataSet object.
The XML web service code contains two methods:
LoadOrders( )
Creates and returns a DataSet containing the Orders and Order Details tables from
Northwind...
... tables.
UpdateOrders( )
Takes a DataSet argument containing the changes made to the DataSet created by
the LoadOrders( ) method, creates two DataAdapter objects with
CommandBuilder generated ...
Use a DataSet object.
The XML web service code contains two methods:
LoadOrders( )
Creates and returns a DataSet containing the Orders and Order Details tables from
Northwind...
... directories allow easier workbook organization. The
difference between subchannel and directories is that a subchannel is a subset
of a channel, whereas a directory can be displayed as a cluster ... InfoCatalog from
the toolbar.
3. Choose the Channel
InfoCatalog tab.
4. Choose Display <->
Change to switch to the
change mode.
5. In Channel, enter a
technical name...
... preventing data entry errors is to use Excel’s data-validation feature.
With data validation, you create rules that specify exactly what kind of data can be entered
and in what range that data can fall. ... values in braces ({}).
■
If you want Excel to treat the values as a row, separate each value with a semicolon.
■
If you want Excel to treat the values as a column, separate each...