Paging With Gridview And ObjectDataSource

Jun 21, 2007

I have a problem with efficiently paging with gridview and objectdatasoruce. I have GetPosts1(startRowIndex, maximumRow, topic_id) and GetPostsCount(topic_id). I tested each procedure and each are working correctly. The problem is with the controls. Here is the code for the controls.

 
   <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False" DataKeyNames
        DataSourceID="ObjectDataSource2">
        <Columns>
            <asp:BoundField DataField="RowNumber" HeaderText="RowNumber" SortExpression="RowNumber" />
            <asp:BoundField DataField="post_id" HeaderText="post_id" SortExpression="post_id" />
            <asp:BoundField DataField="post_subject" HeaderText="post_subject" SortExpression="post_subject" />
            <asp:BoundField DataField="post_text" HeaderText="post_text" SortExpression="post_text" />
            <asp:BoundField DataField="post_time" HeaderText="post_time" SortExpression="post_time" />
            <asp:BoundField DataField="topic_id" HeaderText="topic_id" SortExpression="topic_id" />
            <asp:BoundField DataField="UserName" HeaderText="UserName" SortExpression="UserName" />
            <asp:BoundField DataField="UserID" HeaderText="UserID" SortExpression="UserID" />
        </Columns>
    </asp:GridView>
    <asp:ObjectDataSource ID="ObjectDataSource2" runat="server" OldValuesParameterFormatString="original_{0}"
        EnablePaging="True" SelectMethod="GetPosts1" SelectCountMethod="GetPostsCount" TypeName="PostsTableAdapters.discussions_GetPostsTableAdapter">
        <SelectParameters>
            <asp:QueryStringParameter DefaultValue="48" Name="topic_id" QueryStringField="t" Type="Int32" />
        </SelectParameters>
    </asp:ObjectDataSource>
 
When I run the page, I get "A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll" and then "The thread '<No Name>' (0xbe0) has exited with code 0 (0x0)."
 
Could the problem be with null or empty values in the returned data? 

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Paging With Gridview And ObjectDataSource

Jun 19, 2007

I'm trying to effecinty page through many rows of data with the gridview and objectdatasource. I'm having trouble. I'm using a table adapter with predefined counting and select methods. I have tested all the methods and they all work properly. But when I configure the object datasource to use the table adapter, and set the gridviews datasrouce, the page doesn't load and I wind up getting "time out". Any help?       <asp:GridView ID="GridView1" runat="server" AllowPaging="True" DataSourceID="objTopics">    <Columns>    <asp:BoundField DataField="topic_title" />    </Columns>    <EmptyDataTemplate>    <p>NOTHING HERE</p>    </EmptyDataTemplate>    </asp:GridView>    <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" EnablePaging="True" OldValuesParameterFormatString="original_{0}"        SelectMethod="GetTopics" SelectCountMethod="GetTopicsRowCount" TypeName="TopicsTableAdapters.discussions_GetTopicsSubSetTableAdapter">        <SelectParameters>            <asp:Parameter DefaultValue="1" Name="startRowIndex" Type="Int32" />            <asp:Parameter DefaultValue="10" Name="maximumRows" Type="Int32" />            <asp:Parameter DefaultValue="1" Name="board_id" Type="Int32" />        </SelectParameters>    </asp:ObjectDataSource>

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Feb 3, 2007

Hello,
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Jun 25, 2007

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    (
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    @Address nvarchar(50),
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SQL in SQLDataSource----------------------------
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Questoin 
I am using Sql Server 2000.
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Happy Day And Night For All
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union
select empid2,name2,joindate from emp where id1=3

Now I want to implement paging for the same using Row_Number so that I can display the results in pages.
Can someone please help me write a query for the same. I tried playing with Row_Number but no luck with it.Basically I am not good with SQL and I had programatically implemented paging in asp.net by looping through all records returned by the query.



Thanks,
Ganesh

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Paging (Performance)

Nov 28, 2006

Hello, I have incorporated a paging query in my software. I got the query from here:

http://rosca.net/writing/articles/serverside_paging.asp

My web software ususlly responded in .005 - .02 seconds with about a 100 rows of data. When I put simulated data on my database I added about 2 million rows. when I did this -- every page that did not execute the paging query responded lightning fast. But the webpages that executed the paging query took over 5 seconds. I dont understand why this paging query brought my web application to its knees.

Does anyone know of a more efficient way to do paging. I have SQL server 2000. If it may be easier I can upgrade to SQL 2005. PLZ Let me know. Thanks

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Paging Problem

Mar 14, 2006

Hello, I have a datagrid with paging allowed, but when i click on page number 2 or 3, it still displays the records from the first page. How do I solve this?

Thank you.

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Strategies For Paging

Sep 28, 2007

hello, what are the strategies when designing tables that needspaging?in the past i used to useselect top 200 * from tablewhere id not in (select top 100 id from table)with SQL 2005, would u guys recommend using CTE and/or ROW_NUMBER?or any other advice?thanks

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Paging In SQL Server

Aug 23, 2007



Hiii all

SQL Server 2000 or 2005 dose not support the LIMIT statement like mySQL. So plz can anyone tell me tht how to do paging in SQL Server?? Without using CLR Integration...

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Paging - Sql Server CE

Mar 14, 2007

Since Row_Number() is not available to SQL Server 2005 CE, are there any other alternatives for paging when querying the database?



Thanks.

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HELP: Paging And Sorting

Apr 13, 2008

Hi guys



I know this topic has been gone overed a bit but it just seems that no one has a really good answer.



What i need it to be able to be able to pass in which index row i want to go from and to, as weel a a token which corresponds to how it should be sorted.



The problem with the methods that i have seen to do this is that they all use a case statement to handle the sorting like the below;






Code Snippet


;WITH TotalSales AS (

SELECT CASE @OrderBy

WHEN 'UnitPrice' THEN ROW_NUMBER() OVER (ORDER BY UnitPrice)

WHEN 'OrderQty' THEN ROW_NUMBER() OVER (ORDER BY OrderQty)

WHEN 'CarrierTrackingNumber' THEN (ROW_NUMBER() OVER (ORDER BY CarrierTrackingNumber))

END AS RowNumber,

CarrierTrackingNumber,

UnitPrice,

OrderQty

FROM Sales.SalesOrderDetail

WHERE CarrierTrackingNumber LIKE '%F%'

)



SELECT *

FROM TotalSales

WHERE RowNumber between @StartIndex and @StartIndex + 9




At the begging this looks really good but it turns out that this is really slow. In fact it is about twice as slow as using the below dynamic SQL:




Code Snippet


SET @SafeOrderBy = CASE @OrderBy

WHEN 'UnitPrice' THEN 'UnitPrice'

WHEN 'OrderQty' THEN 'OrderQty'

WHEN 'CarrierTrackingNumber' THEN 'CarrierTrackingNumber'

END


SET @temp = N'

SELECT *

FROM (

SELECT ROW_NUMBER() OVER (ORDER BY ' + @SafeOrderBy + ') AS RowNumber,

CarrierTrackingNumber,

UnitPrice,

OrderQty

FROM Sales.SalesOrderDetail

WHERE CarrierTrackingNumber LIKE ''%F%''

) SUB

WHERE SUB.RowNumber between ' + @StartIndexAlt + ' and ' + @StartIndexAlt + ' + 9'

EXEC sp_executesql @temp





Now for a whole heap of reasons I would like to avoid using dynamic SQL to do this but if the alternative means that my queries take twice as long i dont see i have much of a choice.

Does anyone have any ideas??
Thanks
Anthony

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