I am using a datalist on an ASP.NET 2.0 website. Any idea (or code
examples) how I can use pagination on a datalist?
Thanks! 4 2960
You can consider getting just one page of the data from the database with
sql parameters TOP and START AT.
Eliyahu Goldin,
Software Developer & Consultant
Microsoft MVP [ASP.NET]
"VB Programmer" <do**********@s omewhere.comwro te in message
news:ei******** *****@TK2MSFTNG P03.phx.gbl...
>I am using a datalist on an ASP.NET 2.0 website. Any idea (or code examples) how I can use pagination on a datalist?
Thanks!
Here is an example:
1) A stored procedure that gets page of records from products table in
Northwind database
--------------------------------------------------------------------------------------
ALTER PROC usp_GetProducts Page
(
@pgNdx int,
@pgSize int,
@catId int = NULL
)
AS
-- create a temporary table with the columns we are interested in
CREATE TABLE #ProductsPage
(
RecordID int IDENTITY PRIMARY KEY,
ProductID int,
ProductName nvarchar(40),
UnitPrice money,
UnitsInStock smallint,
CategoryName nvarchar(15),
CompanyName nvarchar(40),
QuantityPerUnit nvarchar(20),
UnitsOnOrder smallint,
ReorderLevel smallint,
Discontinued bit,
CategoryId int,
SupplierId int
)
-- fill the temp table with all the employees
INSERT INTO #ProductsPage
(
ProductID,
ProductName,
UnitPrice,
UnitsInStock,
CategoryName,
CompanyName,
QuantityPerUnit ,
UnitsOnOrder,
ReorderLevel,
Discontinued,
CategoryID,
SupplierID
)
SELECT ProductID,Produ ctName,UnitPric e,UnitsInStock, CategoryName,
CompanyName,Qua ntityPerUnit,Un itsOnOrder,Reor derLevel,Discon tinued,
CategoryID,Supp lierID
FROM vw_ProductsList
WHERE CategoryID = @catId OR @catId IS NULL OR @catId=-1
ORDER BY ProductID
-- declare two variables to calculate the range of records
-- to extract for the specified page
DECLARE @fromId int
DECLARE @toId int
SET @fromId= (@pgNdx * @pgSize)
SET @toId= @fromId + @pgSize -1
-- select the page of records
SELECT * FROM #ProductsPage
WHERE (RecordID BETWEEN @fromId AND @toId)AND
(CategoryID = @catId OR @catId IS NULL OR @catId=-1)
GO
-- usp_GetProducts Page 0,10
---------------------------------------------------------------------------------
You will also need another procedures that returns total number of records
in your products table.
2)then I suggest for simplisity, to add a dropdownlist to your DataList
header or any where in the page, fill this dropdownlist with numbers from 1
to total number of pages which should be
pages = totalNumOfRecor ds / pageRecordsCoun t
increase the pages by 1 if the totalNumOfRecor ds Mod pageRecordsCoun t is
greater that 0
3)Now when the user change the page from the dropdownlist, you need to
submit the page number along with the page size to the above stored procedure.
I wish I could make clearer.. Please contact me by your e-mail and I'll
submit a full example to you if you wish.
Reagrds
Thanks. I'll look this over!
"Muhammad Mosa" <Muhammad Mo**@discussion s.microsoft.comwrote in message
news:2D******** *************** ***********@mic rosoft.com...
Here is an example:
1) A stored procedure that gets page of records from products table in
Northwind database
--------------------------------------------------------------------------------------
ALTER PROC usp_GetProducts Page
(
@pgNdx int,
@pgSize int,
@catId int = NULL
)
AS
-- create a temporary table with the columns we are interested in
CREATE TABLE #ProductsPage
(
RecordID int IDENTITY PRIMARY KEY,
ProductID int,
ProductName nvarchar(40),
UnitPrice money,
UnitsInStock smallint,
CategoryName nvarchar(15),
CompanyName nvarchar(40),
QuantityPerUnit nvarchar(20),
UnitsOnOrder smallint,
ReorderLevel smallint,
Discontinued bit,
CategoryId int,
SupplierId int
)
-- fill the temp table with all the employees
INSERT INTO #ProductsPage
(
ProductID,
ProductName,
UnitPrice,
UnitsInStock,
CategoryName,
CompanyName,
QuantityPerUnit ,
UnitsOnOrder,
ReorderLevel,
Discontinued,
CategoryID,
SupplierID
)
SELECT ProductID,Produ ctName,UnitPric e,UnitsInStock, CategoryName,
CompanyName,Qua ntityPerUnit,Un itsOnOrder,Reor derLevel,Discon tinued,
CategoryID,Supp lierID
FROM vw_ProductsList
WHERE CategoryID = @catId OR @catId IS NULL OR @catId=-1
ORDER BY ProductID
-- declare two variables to calculate the range of records
-- to extract for the specified page
DECLARE @fromId int
DECLARE @toId int
SET @fromId= (@pgNdx * @pgSize)
SET @toId= @fromId + @pgSize -1
-- select the page of records
SELECT * FROM #ProductsPage
WHERE (RecordID BETWEEN @fromId AND @toId)AND
(CategoryID = @catId OR @catId IS NULL OR @catId=-1)
GO
-- usp_GetProducts Page 0,10
---------------------------------------------------------------------------------
You will also need another procedures that returns total number of records
in your products table.
2)then I suggest for simplisity, to add a dropdownlist to your DataList
header or any where in the page, fill this dropdownlist with numbers from
1
to total number of pages which should be
pages = totalNumOfRecor ds / pageRecordsCoun t
increase the pages by 1 if the totalNumOfRecor ds Mod pageRecordsCoun t is
greater that 0
3)Now when the user change the page from the dropdownlist, you need to
submit the page number along with the page size to the above stored
procedure.
I wish I could make clearer.. Please contact me by your e-mail and I'll
submit a full example to you if you wish.
Reagrds
VB P
See a sample here at:- http://www.dotnetjohn.com/articles.aspx?articleid=48
PAtrick
"VB Programmer" <do**********@s omewhere.comwro te in message
news:ue******** ******@TK2MSFTN GP02.phx.gbl...
Thanks. I'll look this over!
"Muhammad Mosa" <Muhammad Mo**@discussion s.microsoft.comwrote in message
news:2D******** *************** ***********@mic rosoft.com...
>Here is an example: 1) A stored procedure that gets page of records from products table in Northwind database -------------------------------------------------------------------------------------- ALTER PROC usp_GetProducts Page ( @pgNdx int, @pgSize int, @catId int = NULL ) AS -- create a temporary table with the columns we are interested in CREATE TABLE #ProductsPage ( RecordID int IDENTITY PRIMARY KEY, ProductID int, ProductName nvarchar(40), UnitPrice money, UnitsInStock smallint, CategoryName nvarchar(15), CompanyName nvarchar(40), QuantityPerUni t nvarchar(20), UnitsOnOrder smallint, ReorderLevel smallint, Discontinued bit, CategoryId int, SupplierId int ) -- fill the temp table with all the employees INSERT INTO #ProductsPage ( ProductID, ProductName, UnitPrice, UnitsInStock , CategoryName , CompanyName, QuantityPerUni t, UnitsOnOrder , ReorderLevel , Discontinued , CategoryID, SupplierID ) SELECT ProductID,Produ ctName,UnitPric e,UnitsInStock, CategoryName, CompanyName,Qu antityPerUnit,U nitsOnOrder,Reo rderLevel,Disco ntinued, CategoryID,Sup plierID FROM vw_ProductsList WHERE CategoryID = @catId OR @catId IS NULL OR @catId=-1 ORDER BY ProductID
-- declare two variables to calculate the range of records -- to extract for the specified page
DECLARE @fromId int DECLARE @toId int SET @fromId= (@pgNdx * @pgSize) SET @toId= @fromId + @pgSize -1
-- select the page of records SELECT * FROM #ProductsPage WHERE (RecordID BETWEEN @fromId AND @toId)AND (CategoryID = @catId OR @catId IS NULL OR @catId=-1) GO -- usp_GetProducts Page 0,10 --------------------------------------------------------------------------------- You will also need another procedures that returns total number of records in your products table.
2)then I suggest for simplisity, to add a dropdownlist to your DataList header or any where in the page, fill this dropdownlist with numbers from 1 to total number of pages which should be pages = totalNumOfRecor ds / pageRecordsCoun t increase the pages by 1 if the totalNumOfRecor ds Mod pageRecordsCoun t is greater that 0
3)Now when the user change the page from the dropdownlist, you need to submit the page number along with the page size to the above stored procedure.
I wish I could make clearer.. Please contact me by your e-mail and I'll submit a full example to you if you wish.
Reagrds
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--
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