I make a program to check certain website.
The idea is to do webclient.DownloadStringAsync thingy and then wait till each one is solved. So like multi threading application.
The program itself is a single thread.
Well, when I loop 400 times it takes too long. Every time I press pause the program in debug it stop at this line[code]...
as per usual i am a little confused. I know DownloadStringAsync runs on a threaded pool with a default min and max threads limit, but what confuses is how would i call DownloadStringAsync say for example ten times.Example.I have an array with 10 URLS. Surely i would not use a for each loop of the array index to pass the url address while each time calling DownloadStringAsync(New Uri("someArray(index)") surely we can pass say a range of items from the array and let DownloadStringAsync decide on the threaded pool how many to process each time?
View 6 RepliesI don't know enough about VB.Net yet to use the richer HttpWebRequest class, so I figured I'd use the simpler WebClient class to download web pages asynchronously (to avoid freezing the UI).
However, how can the asynchronous event handler actually return the web page to the calling routine?[code]...
I am trying to build a code to get the website asynchronously using webclient.download stringasync..I want to pass the data thus retrieved from dowloadstringcompleted to another function.[code]My problem is that I am not being able to pass on the values as StartDownload gets completed, while data is still being retrieved.
View 8 RepliesI'm trying to download a WebPage as a String, which works, however, I can not parse each line of Html at a time. I can either, Parse each Character, or parse the whole thing as a single String. Here's my
[Code]...
i am developing application for windows phone and i want to read an xml from the web so i am using on page loaded event :
Dim cl As New WebClient
AddHandler cl.DownloadStringCompleted, AddressOf cl_DownloadStringCompleted
cl.DownloadStringAsync(New Uri("demo.com/1.xml",UriKind.RelativeOrAbsolute))
and on cl.DownloadStringCompleted event :
Dim doc = XDocument.Load("demo.com/1.xml")
but for some reason i crashes ! the bug must be that i have not to use URI : "demo.com/1.xml" , but some else?
Currently, the sendkeys command is too fast for a game called "Minecraft" to process. Here is the code I got currently:
for the button:
appactive("Minecraft")
timer1.enabled
[code].....
Something happened to my VS2005 setup and now the first time load for F1 can take a full minute to load. I think the last significant thing I did was install an add-in for ESRI ArcExplorer. I uninstalled that add-in but help is stil VERY slow to start.Does anyone recognize the problem and have a simple fix?
View 2 RepliesIs there any way that i can be able to get the ExecutenonQuery to Execute faster. Am using it to run mysql queries that have joins from diffrent tables. As I have come to notice, the user has to wait a while before the statement ExecutenonQuery can be completely executed.. is there any way that I can get it to execute faster?
View 2 RepliesIm using VB2010 professional edition and Ms Access 2007 DB. Main form contains a button which accesses database, fetch results in textboxes and update database. But sometimes it takes almost 40seconds to fetch and sometimes it fetches immediately. Couldn't understand any pattern for this. The table in the database contains 8000records and Main form has 3000 lines of code.
View 2 RepliesWe have old VB6 code, and now that Windows 8 is coming along, we are worried that it won't work. So we have to decide what to port it to. VB.net would seem to make sense, but since it compiles to an intermediate level, its not as fast as programs that compile straight to assembly language. Another choice we found was "Power Basic" which is supposed to be much faster that VB.net.
I happen to like various features of VB.net such as the GUI editor, and intellisense and so forth, and so I'm wondering - is there some way to get around the MSIL (intermediate level) factor in slowing the language down?
its' only me, or is VS2010 really so slooow? This taking 50 seconds to open vs2010, 30 seconds to change from an small project to other small project.as a comparation, in the same machine I can open three different vb6 projects, each one in one different vb6 instance and each one takes "only" three to five seconds. of course I can maintain all the three instances opened all the day, sutching from one to other, debugging, changing, even generatin' exe files, without noticeable penalties.machine is Dell Vostro 1700 4 GB, two internal disks, Win Vista business, Intel Core 2 Duo T 7500 2,2 GHz. two years old.
View 4 RepliesI have a simple code that looks up a text file, reads the line of text, splits the string by semi-colons and then posts the results.
After it has done this, I have created a really simple while loop to waste 10 seconds before going for it again.... here is the code:
Private Sub checkTemps()
While Abort = False
Try
[Code]....
I have this program, which prints a sine wave but it's too fast, how can I slow down the console's line printing speed?
[code...]
am using system.net.mail to send email as shown below, but its too slow. it takes about a minute to send, whats wrong with my code. Am calling the code below in backgroundworker_dowork. is there a faster alternative, maybe free or open source code
' send the email '
Dim smtp As SmtpClient = New SmtpClient()
Dim mail As New MailMessage()[code]............
All of a sudden all vb programs running very slow in XP...... nothing has changed.I took the vb2008 complete out, and reinstalled...... and no difference. other programs like excel run as before, just all my vb2008 programs are really slow.....
View 2 RepliesBasically i have designed an app that runs smoothly on my desktop PC (3GHz processor, 2GB RAM, Windows XP Media Centre (SP3)).
When i put the app on my laptop(1.4GHz processor, 448MB RAM, Windows XP Home Edition (SP2)) it runs really slow and is unusable.
I have tried deploying the app and also just copy the whole folder to my laptop and run the apps *.exe from the bin/debug folder, but it has the same results.
I have tested it on higher spec machines with 2GB RAM and they also replicate the slowness, so i'm at a loss as to why it behaves 100% on my desktop PC, where i have Visual Studio installed but not on any other machine.
My question is if little differences like operating system, RAM, service packs, VS installation, etc, make apps run differently on different machines.
I have designed an application just like it is an Excel table. By changing each textbox the application runs a huge amount of vb code and it takes time.
E.g. you want to enter a three digits number it takes from two to four and sometimes more seconds for ech digit to enter. That`s really embarrassing.
I have a problem with a application, when i start the program the speed is ok.after 1 hour of use the prohram go very slow.
View 7 RepliesI didn't think that setting a background of a form may slow it down seriously, but it's real now
View 3 RepliesI've got a vb.net 2005 form that calls a stored proc to load a combobox with eligible sales reps. There are approximately 40k sales reps available...I know that's a lot, but that's what I'm dealing with. I'm trying to figure out why it's taking this form 15 seconds to load.
Here's my code:
Want to load this in the most efficient way possible given the HUGE amount of data that my client is wanting to see.
Can you help me? :confused:
i know this question was asked a couple of years ago by TheMinistered .. but i cannot find an answer, and i have exaclty the same problem (using both VB6 and VB.net 2003) :
When I attempt to connect to a remote SQL server via ADO it takes almost 20-30 seconds before Open returns. I don't know if it's something I'm doing wrong... here is my connection string/code:
Private Sub Class_Initialize()
Dim strConnectionString As String
Set m_objConnection = New Connection
[Code]......
I'm writing a application that need to execute a certain code several times a second. At first, i wrote a Function and used it. But it was too slow... So, using Stopwatch i started measuring the performance of my code. And apparently it was from the funcion call. So i wrote a example code, just a simple loop. And using the Stopwatch it took 4E-6 = 0.000004 seconds. Then i copy and paste the loop code, into a function and made a call to the function. it took 0.03 seconds. It was 7500 times slower with a function call. Why using a function call can be so much slower?[code]...
View 9 RepliesI have the following code to manipulate the points in a path before drawing it.
Private Function CurvePath(ByVal inputPath As GraphicsPath) As GraphicsPath
Dim tmpPath As New GraphicsPath
Dim newPath As New GraphicsPath
[code].....
I'm upgrading my VB6 program to VB 2008 express .but the IDE is too slow. When I change something it takes 1-2 minutes before I can do anything else?
View 1 RepliesI'm using Visual Studio 2010 Pro on a Windows 7 PC, to build simple VB Windows Form Applications (I've just started learning VB). Lately when I try to debug my applications, it takes unusually long. For example, an application with just a blank form and nothing else will take about a minute to build, and then it will sit for another minute or two until the app window pops up. It didn't use to do this!
View 1 RepliesMy stats:OS: XP Professional (2002) SP2Pentium 4 CPU, 3.2 Ghz, 2.98 G RAMApp: VS 2008 Pro. v 9.0.21022.8 RTM
View 3 Repliesusing System;
using System.Collections.Generic;
using System.ComponentModel;
[code].....
im comparing some datas from 2 arraylists and i need to use something like mid because the last 2 chars of the arraylists().tostring are going to be different and i want to exclude them from the check, basically im using something like this
if mid(arraylist1(i).tostring,1,arraylist1(i).tostring.length - 2) = mid(arraylist2(i).tostring,1,arraylist2(i).tostring.length - 2) then
end if how slow is this into a loop that has to do it up to 7320 times? i checked it on my pc and it semms to work just fine, under 0.3 seconds, but the problem is my pc has 3.6ghz dual core 4gb ram on a windows xp.im more worried about other slower pcs, do you think using that comparison is a bad idea to performance?
I have tried using the My.Computer.Network.DownloadFile method but unfortunately it is slow.
Executing the simple command below takes ~5-10 secs, which I would say is a lot longer than expected for downloading a 9 kb file.`My.Computer.Network.DownloadFile("http://www.google.dk", "j: emp est.html")