I am developing an custom pager but stuck that how to use the functionality of Offset and Fetch in ASP.NETSELECT columns from table order by ID
OFFSET 0 rows fetch next 10 rows only
Just want a head start how i use this in my Repeater Control
Not sure what is the question, but it seems like all you need to do is something like this
SELECT columns from table order by ID
OFFSET (Page-1)*PageSize rows fetch next PageSize rows only
Where Page is a page number and PageSize - amount of items on 1 page.
Related
I have a requirement to fetch 20 records at a time from the database(The database contains atleast 100 records) when the user clicks on search button. When the user clicks the next page button, the next 20 records should be fetched for the same search criteria.How can i implement that in my asp.net application?
Please help.
You can select all data in your Database using Select fldName From TableName Where "Your Condition" is applied pass it to asp.net Gridview and apply Paging for tutorials Try this
Asp.Net PAGING
You can use DataList control and implement Paging property with PageSize = 20.
http://www.dotnetbull.com/2012/08/paging-in-datalist-in-aspnet.html
Here you take a hidden field for remembering search criteria, page number, starting row and last row number.
In SQL, write a query like this:
Select * from (Select *, Row_number()over (order by id) as Row from QatarStockMarket) T
Where T.Row Between 30 and 40
Here, 20 -> start row number and 40 -> last row number.
Now do change a hidden field value. Start at row 40 and end at row 60 for the next page.
I'm using a DataPager control, I want to change count items on each page.
For example :
the First page 6 rows, the second page 311, the third page 12, etc.
Is it possible? If so, how?
my advice is to do it manually, make your own sql query and customize the page size as you want
here are some tips that can help
to get range of rows that are needed for pagination user the row number
MS-sql row number
use the TOP to get the upper set of rows
select TOP 5 * from ....
for sure you'll need to get specific row numbers that will be displayed in the current page
select (--get row number--) from tbl_smth where row_num>5 and row_num<10
were as i guess that you have the page sizes in an array so you have to count them to determine the two numbers {5,10}
hope this will help
I have a logical problem. Assume I have a table that includes 1000 rows. When I want to display the data in a repeater, I first bind CollectionPager 1000 rows, so CollectionPager knows how many pages there will be, and after that, CollectionPager will be my repeaters datasource.
If I index my table using Row_Number() property and select 10 records per time, and multiply it with my page_number, since its selecting 10 records only, its performance will be good. But at this time my pager does not know how many total records are there and so It does not make paging.
In the other hand I do not want to select all 1000 rows?
What do you offer me?
Thank you.
I would suggest to have one and the very first trip to database to just find out the count of total records that you will going to get, you can store it in the viewstate or hidden fields for further page post backs.
Then you can fetch 10 records per database trip and so you will always have
10 records from the database + Total records count that you can use for your pager
In this way your pager will always know the total number of records and hence will perform the paging accordingly
Have a gridview control which will show X amount of rows. I want to the user to be able to select y number of rows, but limit the maximum selected rows to a set view, such as 3. If the user tries to select a fourth row I don't want them to be able to until they unselect a row.
Anyway to do this?
Thanks
Since the GridView works with single selections, how are you allowing them to select the values in the first place, on the client or server? If on the client, you can use JavaScript to do this; simply store an array of the table rows that are selected, if the length is three, then block adding to the array until the user deselects...
Please update how you are doing it, and I can post further.
I am trying to use data paging (not custom data paging - just normal inefficient paging) for about max 125 records, over 5 pages, 25 records per page. But most samples out there seem to be using a gridview or a datagrid, however I want each record to look like this:
Record 1 Title
Record 1 Description
Record 1 Time: Record 1 Contact:
Record 2 Title
Record 2 Description
Record 2 Time: Record 2 Contact:
etc etc, however with grids they result is like a table with bound fields for each column so I can't display it like that using paging, I thought of using a Repeater however I think I will need to use viewstate for that as it doesn't have paging built in and don't want to use ViewState as I have disabled this - can anyone help?
I think what you are looking for is a DataView or a Repeater
The Repeater control is a basic
templated data-bound list. It has no
built-in layout or styles, so you must
explicitly declare all layout,
formatting, and style tags within the
control's templates.