Performance Side Linq Or Dataset.Datatable?
Apr 30, 2009from a performance point of view is it faster to work with linq to sql or dataset.datatable?
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Loop Through Dataset.Datatable Slow Performance In .Net 1.1?
Mar 16, 2009I have a program in where I need to loop though the entire dataset.datatable. I takes a long time. What is the alternative I can use to do the some job but faster?
View 4 RepliesLINQ To DataSet - Convert EnumerableRowCollection Into DataTable
Mar 2, 2012I am trying to convert my EnumerableRowCollection into a DataTable, but I can't see the CopyToDataTable method. The enm.CopyToDataTable() has the blue saw tooth line under it with error saying " 'CopyToDataTable' is not a member of 'System.Data.EnumerableRowCollection' ". I have set a Reference to System.Data, System.Data.Linq, and System.Data.DataSetExtensions. I thought the CopyToDataTable method was part of the System.Data.DataSetExtensions, right? Anyone know why I can't access this method?
[Code]...
Performance Gain In LINQ Query Vs LINQ Stored Procedure?
Aug 6, 2009if there is that much of a performance gain in running a LINQ stored procedure versus a LINQ query?
View 1 RepliesLinq To SQL Performance Using Contains?
Jun 1, 2009I'm overloading a vb.net search procedure which queries a SQL database.One of the older methods i'm using as a comparison uses a Stored Procedure to perform the search and return the query.My new method uses linq.I'm slightly concerned about the performance when using contains queries with linq. I'm looking at equally comparable queries using both methods.Basically having 1 where clause to Here are some profiler results;
Where name = "ber10rrt1"
Linq query : 24reads
Stored query : 111reads
[code]....
Forgetting for a moment, the indexes (not my database)... The fact of the matter is that both methods are fundamentally performing the same query (albeit the stored procedure does reference a view for [some] of the tables).Is this consitent with other peoples experiance of linq to sql? Also, interestingly enough;Using like "BER10%"
resultset.Where(Function(c) c.ci.Name.StartsWith(name))
Results in the storedproc using 13125reads and linq using 8172reads?
Get Performance For Comparing 2 Large DataTable's?
Oct 13, 2011DataTable1“ About 16 000 entries“ coming from SQL[code]...
I have tried using a NOT IN clause in my SQL query with all the entity numbers from table 2 in that query but it takes over 10 minutes to execute.
Using a For Each loop and comparing each row takes about 3 minutes
How To Improve Reading Performance From A Datatable
Oct 25, 2010i have a datatable with about 10000 rows and few columns (4)I have noticed that the process of reading a big table its quite slow..is there a way to improve performance in reading a datatable?
View 15 RepliesHow To Debug DataSet Performance?
Aug 9, 2011I have a dataset in a Visual Studio 2010 Web App project which accesses the DB with a complex SQL statement. If I run the statement in SQL Management Studio directly, it loads in a less than a second. If however, I run it using the "Preview Data" button in the dataset designer, or I try to access it on a page (with a gridview for example), it takes over 40 seconds!
View 2 Replies.net - Performance And Linq In Iterations?
Mar 16, 2012These 2 ways of working both work, but I'm wondering if there's a difference in performance:
Dim collection As ItemCollection = CType(CellCollection.Where(Function(i) i.IsPending = True), ItemCollection)
For Each item As Item In collection
'Do something here
Next
and
For Each item As Item In CellCollection.Where(Function(i) i.IsPending = True)
'Do something here
Next
I thought the second one was better as you'd have a variable less and looks cleaner, but on second thought, I'm not quite sure what happens when you put a linq query in the iteration.
DataSet Editor - Allows The User To Edit A DataTable In A Strongly-typed DataSet
Mar 15, 2010When the user clicks an "Edit" button on my form, I want a box to come up which allows the user to edit a DataTable in a strongly-typed DataSet. What's the best way to do this?
View 2 RepliesIDE :: Dataset Code Behind Datatable.ColumnChanging Event Firing / But Dataset.HasChanges Property Not True
Jan 28, 2010I have code running in the Datatable.ColumnChanging event in my dataset. This dataset underlies a form and conventional drag/drop controls are in place for data entry.when the event triggers and runs, I am running code in the form that checks the dataset.HasChanges property. It is showing False. But this is immediately after the ColumnChanging event has been triggered.Okay, I see by others posts and MSDN that .HasChanges will only be true after moving off the row with the changed column. I have also noted lots of discussion about the advanced binding property of DataSourceUpdate Mode, but that does not address this issue.I guess I can do this by checking the state of the row for the binding source. Just seems odd that the event behind the dataset can be triggered and that does not change the dataset.HasChanges property.
View 3 RepliesImprove The Performance Of Reading Data From Excel And Writing To Datatable?
May 21, 2011I want to import data from excel and move that to Datatable in VB.NET 2008. I wrote and working but its taking too long time.. for 1500 records its taking 4.40 min.
[Code]...
Performance Concerns Between DataTable And SqlDataReader To Fill Data With FlexGrid
Nov 5, 2009Which one is more faster between DataTable and SqlDataReader while I'm trying to fill Data into FlexGrid with VB.NET?
View 3 RepliesAsp.net - Copy Data From Datatable To Dataset.datatable?
Oct 31, 2010how to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
Improve Paged Gridview Performance : Huge Underlying Dataset?
Jul 1, 2010I'm currently working with a gridview that has a huge underlying dataset.I'm almost certain that I saw something about a new facility in Visual Studio 2010/.NET 4, which would improve the performance (e.g. doesn't download all the data on databind, but rather only what data required for current page). My guess would be that it was using AJAX.I didn't need it at the time I saw it, and now I can't find it, even though I've been hunting online for a while.
View 2 RepliesThreading Doesn't Impact The Performance While Reading Dataset Records?
Aug 29, 2011I am having dataset with 5000 records.I am reading them in the below 2 functions and writing to excel.
FillDataRows1(worksheet)
FillDataRows2(worksheet)
private sub FillDataRow1(byval ws as worksheet)
[code]....
When I create thread also it is taking same time .
Datatable Getdata Performance - In-line Table Valued Function In SSMS Takes About 6 Seconds To Return 11088 Records?
Mar 25, 2011An in-line table valued function in SSMS takes about 6 seconds to return 11088 records. The same function in VB .Net 4.0 using TableAdapters.InputTableAdapter.GetData (Created with data set designer) takes about 15 minutes complete.Both are executed from the same workstation.Why does this discrepancy exist?
Workstation:
Windows XP SP3, 2GB
VS2010 Ultimate
.Net 4.0 Framework
Server:
SQL Server 2008
C# - Send An Object From Client-side Javascript To Server-side Code Via ASP.NET?
May 23, 2011Can I send an object from client-side javascript to server-side code via ASP.NET ?
View 5 RepliesAny Way To Add DataTable To DataSet?
Jul 29, 2010I have build a datatable in vb
dim Booking_table as datatable
Is it possible to add this datatable to a dataset or do I have to build in acces2007 and import in VB.
DataSet / DataTable - How To Do Add Row
Nov 4, 2010I have a strongly typed dataset and datatable and I am trying to do an add row.
Dim newDT As New hdar.AccessRequestsDataTable
Dim newRow As hdar.AccessRequestsRow = newDT.NewAccessRequestsRow
newRow.Number = nextNumber
newRow.RequestedByID = Me.cboUser.SelectedValue
newRow.RequestedOn = Date.Now.ToShortDateString
[Code] .....
Get ID From DataTable With Dataset?
Apr 27, 2012i am using Microsoft.Office.Interop.Excel to read the data from excel,
--Students_Table--
id_S | Name | Sex
12 john M
[code]....
-----the table where uploaded excel file saved--
id_u | id-S | Scor |
1 12 30
i want to get the Id_S from "John"(excel file), i tried using the dataset with query
select Id_P from Students_Table where (Name =: Name)
and then check fillBy & GetBy my vb code :
Dim ta As New Students_TableAdapters.StudentsTableAdapter
Dim DataID as Integer
if ta.fillBy(ExlRead.Value) <> 0 then
[code]....
i use breakpoint to check those and i found an error message
"ORA-01722: invalid number"
(i'm using oracle database)if i pointed my cursor to the ta.fillBy it shows Public Overridalle Overload Function FillBy(Name as string) as decimal?
Fire Client Side Code From Server Side At Runtime
Apr 13, 2010I know this defeats the purpose of client side vs. server side (refer to title of this thread). What I would love to do is build my own custom progress indicator on the client showing how far a server side code has progressed. I figure if I could only get a JavaScript to fire and render a value of some control at pre-defined intervals while the server is working I could make it happen - but alas I'm beginning to believe that this is impossible. Below is some code that performs three 2 sec loops. At the end of each I want to change the visible value of a control on the browser. [Code]
View 8 RepliesHtml - Webpage Stacking Xml Documents Instead Of Showing Side By Side, CSS?
Feb 23, 2012I have a basic asp.net web page. I have a menu bar divided into 3 columns. Each column displays an xml file. However instead of showing them side by side it displays them one on top of each other. i think it might be to do with my css?
My asp.net web code:
<div class="menubar">
<div class="menuleft">
[code]....
Javascript - Format Data (client-side) For (server-side)
Jul 13, 2011Using the following script:
$("#some_button").click(function() {
var changed = [];
[CODE]...
I need to send back the id, the old value from _1 and the new value from _0 back to the server. What is the best way to format this data so I can easily extract the data from the server side so I can easily email someone for example to let them know which textboxes have changed, what the old values were, and what the new values are
At the serverside level, I am using .NET-3.5 (VB). I know how to send the data bacl. and how to email the data, I just wanted to know how to best format the data at clientside before sending it back. I could have upto 50 sets of id, old, and new values to send back. Sorry for not making that clear earlier.
Example:
How can I modify the script above to generate this?
[
{
"id": "name_0",
"new": "text",
[CODE]...
Making A Button That Can Move In A Path Random Up,down, Side -side, Etc?
Dec 18, 2011I'm working on a 2d game. making a button that can move in a path random up,down, side -side, etc. in a selected space. and once hits end of the form to slide out and reappear at other side of the selected space and do same thing over.
View 1 RepliesDataset And Inside Of It Theres Two(2) Datatable?
Jul 27, 2010I have a dataset and inside of it theres two(2) datatable. Is it possible to do this kind of query.
"SELECT DATATABLE1.NAME FROM DATATABLE1 INNER JOIN DATATABLE2 ON DATATABLE1.ID = DATATABLE2.ID"
.net - DataTable Already Belongs To Another DataSet
Jan 12, 2012This error is occuring while adding one datatable from a dataset to another ."DataTable already belongs to another DataSet."
dsformulaValues.Tables.Add(m_DataAccess.GetFormulaValues(dv.ToTable.DefaultView.ToTable(False, strSelectedCols)).Tables(0))
Putting A Datatable Into A Dataset?
Jun 16, 2010I am trying to put a datatable into a dateset, which I then export to a CSV file. I am getting this error
DataTable already belongs to another DataSet. on the following line dsExport.Tables.Add(dtExport)
VB
Using dtExport As DataTable = DirectCast(dgvSafetyGlasses.DataSource, DataTable)
[Code]....
Xmldocument To Datatable Or Dataset?
Mar 16, 2009I am ably to load a XML file (via a filepath) to a datatable. See code below.However, I'd like to be able to load a in-memory XML document to a datatable.
Code: Public Function XmlToDataTable(ByRef filePath As String) As DataTable
Dim ds As New DataSet Dim dt As New DataTable ds.ReadXml(filePath) dt = ds.Tables(0).Copy()
Return dt
End Function
.net - Convert DataTable To Linq?
Feb 10, 2010I'm trying to convert DataTable to Linq using
DIm result = From r in dt.AsEnumerable()
Select new ( col1 = r.Field<integer>("id"), col2 = r.Field<string>("desc"))
But i get error near 'new (' saying type expected.