Question

Hi I am currently using TableAdapter that returns a dataTable, which is fine to use when result table should have more than one row like :

MyItemsDataTable myItemsDataTable = Adapter.GetAllItems();  

but if we need only one row as a result, say an item, which has a particular ID

MyItemsDataSet.MyItemRow  itemRow = Adapter.GetItemByID(id)[0];  

how can I make Adapter to return one row instead of DataTable.
I am using DataSet Designer wizard and gives me two options for putting in SELECT statement

Use SQL statements -->  Select which return rows
(returns one or many rows)
Use SQL statements -->  Select which returns a single value rows
(returns a single value) 

and using similar query

SELECT * from
FROM  FOOD_ITEMS
WHERE (ITEM_ID = @ITEM_ID)

Do I need to override this method or add a new one ?

public virtual MyItemsDataSet.MyItemsDataTable  GetItemByID(int ITEM_ID)

probably something like

public virtual MyItemsDataSet.MyItemRow GetItemByID(int ITEM_ID)

If so, I cannot do it in designer generated file !! where can I do this ?

Thanks

Answer 1

Create a new Select statement in the Dataset Designer. Use Select which return rows. Then use the following query:

SELECT TOP 1 * from 
FROM  FOOD_ITEMS 
WHERE (ITEM_ID = @ITEM_ID)

Save this method as GetFirstItemByID() or something similar.

---

For the googlers out there, many of the non-MS databases (eg. MySQL) will use the following syntax instead:

SELECT * from 
FROM  FOOD_ITEMS 
WHERE (ITEM_ID = @ITEM_ID)
LIMIT 1