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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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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Mar 11, 2006
The function that is supposed to delete a row, is not working. The function is called, and the windows is refreshed, but the row is not deleted.Can anyone see anything wrong with this code:public static void DeleteBlog(int original_BlogID) { string insertCommand = "DELETE FROM Blog WHERE BlogID = @BlogID"; SqlConnection myConnection = new SqlConnection(Blog.ConnectionString); SqlCommand command = new SqlCommand(insertCommand, myConnection); command.Parameters.Add(new SqlParameter("@BlogID", original_BlogID)); myConnection.Open(); command.ExecuteNonQuery(); myConnection.Close();}
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Feb 3, 2007
Hello,
I have a SQL database with about 300 company names and corresponding phone numbers. I would like to show a list of linkbuttons titled A-Z and when pressed, rebind the sqldatasource so that my GridView will only show company names that start with that letter.
I know there are some examples on codeproject.com, but they are a bit over my head... besides, I don't mind writing a custom select statement for the OnClick of every linkbutton if that's what I have to do. Problem is I haven't a clue how to write a select statement that will return items who's first letter matches my desired letter?
Any idea?
Thanks,
-Derek
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Jun 25, 2007
I have a webpage that displays 4000 or more records in a GridView control powered by a SqlDataSource. It's very slow. I'm reading the following article on custom paging: http://aspnet.4guysfromrolla.com/articles/031506-1.aspx. This article uses an ObjectDataSource, and some functionality new to Sql Server 2005 to implement custom paging.There is a stored procedure called GetEmployeesSubestByDepartmentIDSorted that looks like this:ALTER PROCEDURE dbo.GetEmployeesSubsetByDepartmentIDSorted( @DepartmentID int, @sortExpression nvarchar(50), @startRowIndex int, @maximumRows int)AS IF @DepartmentID IS NULL -- If @DepartmentID is null, then we want to get all employees EXEC dbo.GetEmployeesSubsetSorted @sortExpression, @startRowIndex, @maximumRows ELSE BEGIN -- Otherwise we want to get just those employees in the specified department IF LEN(@sortExpression) = 0 SET @sortExpression = 'EmployeeID' -- Since @startRowIndex is zero-based in the data Web control, but one-based w/ROW_NUMBER(), increment SET @startRowIndex = @startRowIndex + 1 -- Issue query DECLARE @sql nvarchar(4000) SET @sql = 'SELECT EmployeeID, LastName, FirstName, DepartmentID, Salary, HireDate, DepartmentName FROM (SELECT EmployeeID, LastName, FirstName, e.DepartmentID, Salary, HireDate, d.Name as DepartmentName, ROW_NUMBER() OVER(ORDER BY ' + @sortExpression + ') as RowNum FROM Employees e INNER JOIN Departments d ON e.DepartmentID = d.DepartmentID WHERE e.DepartmentID = ' + CONVERT(nvarchar(10), @DepartmentID) + ' ) as EmpInfo WHERE RowNum BETWEEN ' + CONVERT(nvarchar(10), @startRowIndex) + ' AND (' + CONVERT(nvarchar(10), @startRowIndex) + ' + ' + CONVERT(nvarchar(10), @maximumRows) + ') - 1' -- Execute the SQL query EXEC sp_executesql @sql ENDThe part that's bold is the part I don't understand. Can someone shed some light on this for me? What is this doing and why?Diane
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Jun 12, 2008
Hi, I am seeking a hopefully easy solution to spit back an error message when a user receives no results from a SQL server db with no results. My code looks like this What is in bold is the relevant subroutine for this problem I'm having. Partial Class collegedb_Default Inherits System.Web.UI.Page Protected Sub submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles submit.Click SqlDataSource1.SelectCommand = "SELECT * FROM [college_db] WHERE [name] like '%" & textbox1.Text & "%'" SqlDataSource1.DataBind() If (SqlDataSource1 = System.DBNull) Then no_match.Text = "Your search returned no results, try looking manually." End If End Sub Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load SqlDataSource1.SelectCommand = "SELECT * FROM [college_db] ORDER BY [name]" SqlDataSource1.DataBind() End Sub Protected Sub reset_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles reset.Click SqlDataSource1.SelectCommand = "SELECT * FROM [college_db] ORDER BY [name]" SqlDataSource1.DataBind() End SubEnd Class I'm probably doing this completely wrong, I'm a .net newb. Any help would be appreciated. Basically I have GridView spitting out info from a db upon Page Load, but i also have a search bar above that. The search function works, but when it returns nothing, I want an error message to be displayed. I have a label setup called "no_match" but I'm getting compiler errors. Also, next to the submit button, I also have another button (Protected sub reset) that I was hoping to be able to return all results back on the page, similar to if a user is just loading the page fresh. I'd think that my logic would be OK, by just repeating the source code from page_load, but that doens't work.The button just does nothing. One final question, unrelated. After I set this default.aspx page up, sorting by number on the bottom of gridview, ie. 1,2,3,4, etc, worked fine. But now that paging feature, as long with the sorting headers, don't work! I do notice on the status bar in the browser, that I receive an error that says, "error on page...and it referers to javascript:_doPostBack('GridView1, etc etc)...I have no clue why this happened. Any help would be appreciated, thanks!
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Dec 24, 2007
Hi,
I have been trying to get the scope Identity after inserting a record using an ObjectDataSource.
I can't find what event, or how to get the value that the scope identity returns.
Here is my Sproc.
ALTER PROCEDURE dbo.[YourCompany_LanCustomer_Insert]
(
@DNNUserID int,
@FirstName nvarchar(50),
@LastName nvarchar(50),
@Address nvarchar(50),
@Address2 nvarchar(50),
@City nvarchar(50),
@State nvarchar(50),
@Zip nvarchar(50),
@EmailAddress nvarchar(50),
@PhoneNumber nvarchar(50),
@CustomerID int OUTPUT
)
AS
INSERT INTO YourCompany_LanCustomer
(DNNUserID, FirstName, LastName, Address, Address2, City, State, Zip, EmailAddress, PhoneNumber, DateEntered)
VALUES (@DNNUserID, @FirstName, @LastName, @Address, @Address2, @City, @State, @Zip, @EmailAddress, @PhoneNumber, getdate())
SET @CustomerID = Scope_Identity()
RETURN
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May 27, 2008
I have a gridview control that accesses either an objectdatasource or a sqldatasource
both of which excute "select * from customers"
the affected-rows property when using the sqldatasource is always the number of rows returned (what I want)
but i need to use an object data source to access a table-adapter
when using the ODS affectedrows is always -1 no matter how mayn rows were returned
why is this
is there another way to get the number of records returned by an ODS
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Jan 16, 2006
I have an SQLDataSource that I would like to filter out some records that are stored in an ObjectDataSource. Is this possible? The data that is filling the ObjectDataSource is being populated by a WebService.
SQL in SQLDataSource----------------------------
SELECT id, accountFROM contactWHERE id NOT IN (SELECT id FROM ObjectDataSource.Records...)
Thanks.
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Nov 22, 2007
How can you use SQL Full Text Search CONTAINS() with an asp.net 2.0 ObjectDataSource using @Parameters?
MSDN says something like this, but only works directly using like the Query from SQL Manager:
USE TestingDB;GODECLARE @SearchWord NVARCHAR(30)SET @SearchWord = N'performance'SELECT TestTextFROM TestingTableWHERE CONTAINS(TestText, @SearchWord);
I tryed to mak something like that work with the DataSet DataAdapter Query Builder for the ObjectDataSource, but you can't use DECLARE or SET.
SELECT TestTextFROM TestingTableWHERE CONTAINS(TestText, @SearchWord);
But again it says @SearchWord not a valide SQL Construct
Is there anyway to make a DataSet.DataApater.ObjectDataSource work with an SQL FTS CONTAINS() with @Parameters?
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Mar 10, 2008
I wrote a Scalar UDF in SQL2005 that returns an integer. I want to be able to display this integer in a ASP.Net 2.0 web page. I typically use a DAL for all data so I added an ObjectDataSource as a Qeury that contains only the UDF. How do I easily display the value in a Label Control or?
I have tried to use a Repeater with a label, a Formview with a Label, all to no avail. Any suggestions?
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Apr 3, 2008
I got the following error when trying to pass a parameter from an ObjectDataSource to a BLL during the OnObjectCreated event:No parameterless constructor defined for this object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.MissingMethodException: No parameterless constructor defined for this object.The ObjectDataSource in the aspx is as follows:
<asp:ObjectDataSource ID="LoadData" runat="server" SelectMethod="GetData" TypeName="Export00.Export" OnObjectCreated="SrcObjectCreating"> </asp:ObjectDataSource>
The code behind in aspx.cs is as follows:
protected void SrcObjectCreating(object sender, ObjectDataSourceEventArgs e)
{ Export sqlcommand = new Export("SELECT [DocTitle], [DocID] FROM [Document]"); e.ObjectInstance = sqlcommand;
}
The BLL is as follows: Export.cs (this is the BLL)
namespace Export00{ public class Export { private readonly string connString; private readonly string sqlCommand;public Export(string command) { sqlCommand = command; connString = WebConfigurationManager.ConnectionStrings["MyConnString"].ConnectionString; } }
}Can someone tell me why am I getting this constructor error and how to resolve it? Thanks in advance.sg2000
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Mar 5, 2007
Hi
Using ASP.NET 2.0, Sql Server 2005.
I have a simple page (NOT a formview) with some entries textbox's , checkbox and dropdownlistbox's
I want to link a datasource to the 'Item Page' and bind the datasource's values to the page
The select statement is
Select a.IssueID,
a.ProjectID,
a.VersionID,
a.toincludeversionid,
a.Version,
a.toincludeversion,
a.TypeofEntryID,
a.PriorityID,
a.WorkFlowID,
a.Title,
a.Area,
a.Details,
a.Question,
a.Answer,
a.HowToRepro,
a.DevelopersNotes,
a.TestersNotes,
b.ProjectID,
b.ProjectName,
OldVersion.Version,
ToIncludeVersion.Version,
d.DESCRIPTION,
e.DESCRIPTION,
x.TaskID as TaskID,
x.DESCRIPTION as TaskDescription,
z.Taskdone,
CONVERT (char(9),z.TaskAssignedDate, 3) AS Workflowdate,
z.StaffID as StaffID,
w.username,
y.latest_workflowid
from issue as a
Inner join ProjS b on b.ProjectId=a.ProjectID
Left Outer join Version OldVersion on a.VersionID=OldVersion.VersionID
Left Outer join Version ToIncludeVersion on a.VersionID= ToIncludeVersion.VersionID
Inner join TypeOfEntry d on d.TypeOfEntryID=a.TypeofEntryID
Inner join Priority e on e.PriorityID=a.PriorityID
inner join workflow z on z.issueid=a.issueid
Inner join (select issueid,max(workflowid) as latest_workflowid from workflow group by issueid) y on y.latest_workflowid=z.workflowid
Inner join task x on x.taskid=z.taskid
Inner join staffls w on w.StaffID=z.StaffID
Where a.IssueID= @IssueID
I hope I have made query clear, if not I don't mind explaining more.
Thanks in advance
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Jun 2, 2008
I've been studying this tutorial over here at: http://quickstarts.asp.net/QuickStartv20/aspnet/doc/data/databases.aspx#updatedelete
but I can't seem to get my gridview working. I want to be able to edit the fields and also delete an entire row from the table if needed.
I hard coded in the update and delete commands into my objectdatasource but I still get the error message. Also, I can't even refresh the aspx page:
<%@ Page Language="VB" MasterPageFile="~/templates/admin.master" AutoEventWireup="false" CodeFile="article_comments.aspx.vb" Inherits="admin_Default2" title="Untitled Page" %><asp:Content ID="Content1" ContentPlaceHolderID="PageHeading" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="PageContents" Runat="Server">
`<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" DataSourceID="ObjectDataSource1" Width="536px" DataKeyNames="ratingID">
<Columns>
<asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
<asp:BoundField DataField="ratingID" HeaderText="ratingID" InsertVisible="False"
ReadOnly="True" SortExpression="ratingID" />
<asp:BoundField DataField="rating" HeaderText="rating" SortExpression="rating" />
<asp:BoundField DataField="ip" HeaderText="ip" SortExpression="ip" />
<asp:BoundField DataField="itemID" HeaderText="itemID" SortExpression="itemID" />
<asp:BoundField DataField="comment" HeaderText="comment" SortExpression="comment" />
<asp:CheckBoxField DataField="active" HeaderText="active" SortExpression="active" />
</Columns>
</asp:GridView>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetRatings" TypeName="articlesTableAdapters.tblArticleRatingTableAdapter" DataObjectTypeName="articles+tblArticleRatingDataTable" DeleteMethod="DELETE FROM [tblArticleRating] WHERE [ratingID] = @ratingID" UpdateMethod="UPDATE [tblArticleRating] SET [ratingID] = @ratingID, [rating] = @rating, [ip] = @ip, [itemID] = @itemID, [comment] = @comment WHERE [ratingID] = @ratingID">
<UpdateParameters>
<asp:Parameter Name="dataTable" Type="Object" />
<asp:Parameter Name="itemID" Type="Int32" />
</UpdateParameters></asp:ObjectDataSource>
</asp:Content>
>
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Oct 12, 2004
Is there any way to implement a paging scheme such that only the required records are transferred from SQL Server to the asp.net app?
The only support I can find such as the DataAdaptor.Fill will bring all the records back from SQL Server and then create the page...
This obviously still takes time and memory based on the entire query, not the page size.
Any ideas?
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Jul 26, 2005
I have a table with a lot of records. I want to make paging without passing all the data back to a dataset. I know how to select the top n rows but how do I select 10-20 for example.
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Dec 9, 2005
Hello,
How can I do paging in my SQL Server stored procedure.
I have thought of a way, but I need to :
"SELECT TOP @Count..."
which is not allowed :S
What can I do to get around this?
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Dec 11, 2003
I have noticed that the server i'm running SQL2k on is starting to page out of the norm. I can see that the regsvc and sqlservr svc are showing high page faults/sec. I have 3 gigs of ram and set the max that sql can use to 2 gigs. It is currently using only 168 MB and still will show high paging at random times. I know I can add more ram but that doesn't seem to be the problem. I have also stopped unnecessary services at the os level.
Any other suggestions to fix this?
Thanks in advance.
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May 9, 2008
Hi there
I've managed to make it query that return a dataset that have 2 views utilising the "Filter" in RS. I treat this as a single record with multiple views.
Now let say if I have a stored precedure that pass 2 parameters one is called state and year and accepting 'ALL' for every possibility of State and Year and construct that into single dataset with 2 views similar like above.
How do I breakdown this in the reporting services so it will have paging?
This is a simple dataset:
RECORDID, ReportViewType, State, Year, VALUE
1, "VIEW1", "NSW", 1, null
1, "VIEW2", null, null, 10000
2, "VIEW1", "NSW", 2, null
2, "VIEW2", null, null, 11000
3, "VIEW1", "VIC", 1, null
3, "VIEW2", null, null, 11003
4, "VIEW1", "VIC", 2, null
4, "VIEW2", null, null, 11001
I would like to break down (paging) this per recordid. Each page obviosuly has 2 views using the same data set with different FILTER.
Do I need to put into a LIST then inside that list put 2 TABLES? Is this possible?!?!
Thanks
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Aug 2, 2006
I have created a stored proc for paging on a datalist which uses a objectDataSource.
I have a output param itemCount which should return the total rows. Them I am creating a temp table to fetch the records for each page request. My output param works fine if I comment out all the other select statements. But returns null with them. Any help would be appreciated.
CREATE PROCEDURE [dbo].[CMRC_PRODUCTS_GetListByCategory]( @categoryID int, @pageIndex INT, @numRows INT, @itemCount INT OUTPUT )AS
SELECT @itemCount= COUNT(*) FROM CMRC_Products where CMRC_Products.CategoryID=@categoryID Declare @startRowIndex INT; Declare @finishRowIndex INT; set @startRowIndex = ((@pageIndex -1) * @numRows) + 1; set @finishRowIndex = @pageIndex * @numRows
DECLARE @tCat TABLE (TID int identity(1,1),ProductID int, CategoryID int, SellerUserName varchar(100), ModelName varchar(100), Medium varchar(50),ProductImage varchar(100),UnitCost money,Description varchar(1500), CategoryName varchar(100), isActive bit,weight money)
INSERT INTO @tCat(ProductID, CategoryID,SellerUserName,ModelName,Medium,ProductImage,UnitCost,Description,CategoryName, isActive,weight)SELECT CMRC_Products.ProductID, CMRC_Products.CategoryID, CMRC_Products.SellerUserName, CMRC_Products.ModelName, CMRC_Products.Medium,CMRC_Products.ProductImage, CMRC_Products.UnitCost, CMRC_Products.Description, CMRC_Categories.CategoryName, CMRC_Products.isActive,CMRC_Products.weightFROM CMRC_Products INNER JOIN CMRC_Categories ON CMRC_Products.CategoryID = CMRC_Categories.CategoryIDWHERE (CMRC_Products.CategoryID = @categoryID) AND (CMRC_Products.isActive = 1)
SELECT ProductID, CategoryID,SellerUserName,ModelName,Medium,ProductImage,UnitCost,Description,CategoryName, isActive,weightFROM @tCat WHERE TID >= @startRowIndex AND TID <= @finishRowIndexGO
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Dec 13, 2006
I am using a stored procedure to page some objectsThe procedure looks like this:
CREATE PROCEDURE sw20aut.sw20_Kon( @sid_nr INT, @sid_stl INT = 35, @kid int )AS BEGIN SET NOCOUNT ON DECLARE @rader INT, @sid_antal INT, @ubound int, @lbound int SELECT @rader = COUNT(*), @sid_antal = COUNT(*) / @sid_stl FROM sw20aut.sw_kontakter WITH (NOLOCK) WHERE kund_id = @kid AND del = '0'
IF @rader % @sid_stl != 0 SET @sid_antal = @sid_antal + 1 IF @sid_nr < 1 SET @sid_nr = 1 IF @sid_nr > @sid_antal SET @sid_nr = @sid_antal SET @ubound = @sid_stl * @sid_nr IF(@sid_antal > 0) SET @lbound = @ubound - (@sid_stl - 1) ELSE SET @lbound = 0 SELECT CurrentPage = @sid_nr, TotalPages = @sid_antal, TotalRows = @rader
DECLARE @ename VARCHAR(64), @fname VARCHAR(64), @konid VARCHAR(64) SET ROWCOUNT @lbound SELECT @ename = enamn, @fname = fnamn, @konid = kon_id FROM sw20aut.sw_kontakter WITH (NOLOCK) WHERE kund_id = @kid AND del = '0' ORDER BY enamn, fnamn, kon_id SET ROWCOUNT @sid_stl SELECT kon_id, enamn, fnamn FROM sw20aut.sw_kontakter WITH (NOLOCK) WHERE enamn + fnamn + '~' + CAST(kon_id as VARCHAR(64)) >= @ename + @fname + '~' + @konid AND (kund_id = @kid AND del = '0') ORDER BY enamn, fnamn, kon_id SELECT startid = @konid SET ROWCOUNT 0END
The big problem is that i need to display objet with the same name. In my book the best identifier is the PK and therefor i have sorted as above by ordering after LastName, FirstName, ContactId
After som thinking ive reached the conclusion that this dont work if the idnumbers isnt of the same length. as long as they are(for example two people named John Smith, one with id = '23' and one with id = '87' it works. If there ids would have been '23' and '1203' it will not work correctly) of the same length it works fine.
What im wondering is if anyone have a good solution to this? Only thing i can think of is filling all idnumbers with zeros to equal length. Dont know how and if this will affect performance though. Anyone has a practical solution to this?
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Aug 8, 2007
Questoin
I am using Sql Server 2000.
I have a table named Cities which has more than 2600000 records.
I have to display the records for a specific city page wise.
I don't want to compromise with performance.
Can anyone has the idea?
Waiting for your fruitful response.
Happy Day And Night For All
Muhammad Zeeshanuddin Khan
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Feb 10, 2008
Hello To make pagination I would like to retrieve only the record from x to y ...I couldn't find how to do to in sql , I was thinking so if there is a way to do it with a sqldatasourceI make my request , put it in a sqldatasource and bind it to my datalistis there a way to "filter the sqldatasource ?" to make what I need ? Thx in advance ?
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May 23, 2005
Im in the process of trying to teach myself SqlServer, comming from Oracle. How the heck do I get the equivlent of %ROWNUM pseudo-column in SqlServer? Top just isn't doing it for me.
Oracle Example wrote:
Select * from foo where foo%ROWNUM > 10 and foo%ROWNUM <20;
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Feb 21, 2003
I have a paging dilema with an ADO/ASP web based application.
Currently I am using the temp table and inserted index method of paging which works well but the pages that use this paging have a variety of filters on them and a largish subset of data available. This means that every time the page is refreshed the code is creating that temporary table, inserting all the data, selecting the subset and then dropping it.
I was looking for a more efficent way of getting paged data to the client. One of the alternatives I came across was using a server side forward only cursor and the ado getrows() method. This sounds good in princible but I don't know if I am going to get a performance hit by using a server side cursor as opposed to sending the entire recorset to the client and letting it page the results.
Would it be any better to use a stored procedure and pass the full sql statement to it. I can't actually write the sql into the stored procedure becuase it is all totally dynamic.
So I guess I have three options, temp tables, server side cursor and small amounts of data sent to the client or client side cursor and large amounts of data sent to the client.
Any ideas or recomendations?
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Jan 5, 2007
Is this a correct statement? When commit Charge total (k) is greater than Physical Memory total (k) then the server is paging badly, correct?
thanks.
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Apr 25, 2008
Hi,
My application runs this query using a stored proc
SELECT empid1,name1,joindate from emp where empid2=3
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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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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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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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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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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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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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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