Count Time Of Typical SQL Request And Cut Connection If Too Long
Oct 11, 2011
I need to find the best solution to count how long it takes to make a request to database like connect, do a select and receive the answer. And if that take more than 300 milliseconds I must cut the connection.
Public Function FindLastCt() As Decimal
FindLastCt= 0
Dim strrequete As String = "SELECT MAX(CM_Codigo) FROM CAJITAS WHERE CM_Date >= '" & Format(DateTime.Now, "dd/MM/yyyy") & " 00:00:00.000' AND CM_Date <=
'" & Format(DateTime.Now, "dd/MM/yyyy") & " 23:59:59.999'"
Using connection As DbConnection = factory.CreateConnection()
[Code] .....
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Feb 18, 2010
I've been using VB for exactly a week today and for that past 4 hours I've been pulling my hair out! My problem is that our software can only run on one PC on a site, if two instances are running they cause issues. So instead of checking each PC individually I created a program with VB to do this (and other tasks) for me. The problem with the network search is that if I cannot access a remote PC (usually access is denied) then it hangs for a long time before moving on to the next. Can I introduce a timeout feature where the program tries to access the c drive but if it does this for more than 5 seconds and gets nowhere then it moves on? [code]'testcpath' is \pcnamec$ and the other two paths look for the software I'd need to remove if found. So basically, if I have access to every c drive it works fine and completes within a few minutes. If I don't have access to even a small amount then it takes an absolute age.
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Jul 29, 2009
Is there a way in which I can detect how long someone has been idle using a form (ie. Not clicking or entering any information into any fields/textboxes). Or would I have to implement a timer which counts this and reset it in the event handler for any entry?
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Jul 7, 2011
look at this code and see how i can speed it up? Its calling a sub to count commas in long string.Calling part 'Sort the incomming messages Dim count_Coma As Integer = CountCharacter(_InMessToAction, ","c)
The sub. This takes about 0.7 of a second to count 20 commas in string _InMessToAction. Was hoping to get it down to 0.1... if at all possible.
[Code]...
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Oct 14, 2011
I am performing a simple exercise of opening an SQL Server database connection, pulling the first record of a table from a DataReader object, and then closing the object. However, I have noticed that theres bit of a delay, about 5 seconds or so, in closing the connection. However, the delay only occurs after the command object executes the specified query. I've worked in a setup like this before and don't remember there being such a long delay while closing the connection. [Code] The connection closes almost immediately. What gives? I have narrowed it down to the where the .ExecuteReader line that causes the delay in the connection close. Whats causing the delay and how do I resolve it?
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Dec 2, 2009
while looping through a short XML file called from xmltextreader retrieved from a webservice, I'm repeatedly getting the error: The request was aborted: The connection was closed unexpectedly. it constantly dies a row or two from completing the parsing.here's my short code:Code:
'Get the principal-id for Group Dim url As String = "https://xxxxx.acrobat.com/api/xml?action=principal-list&session=" & strCookie xmlRead = WebRequestToServer(url) Do While xmlRead.Read If xmlRead.NodeType = XmlNodeType.Element Then If xmlRead.Name = "principal" Then strGroupID = xmlRead.GetAttribute("principal-
[code]....
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Feb 5, 2010
Is there a way to display the connection properties dialog for connection string browsing(for database) in run time?
As I want the user to be able to connect to various database using the GUI.
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Oct 26, 2010
My app currently sends GET httpwebrequests and parses the content after reading the response stream for each request and the repeats this process over and over. I need to implement a continuous http stream which uses the same GET request but the connection stays open, from what I understand. how would I change my existing code to do this?
The streaming HTTP implementation allows one to cosume data in real time over a single persistent HTTp request. It access a data feed that continues to send activities on that response. I need to read data from the response, process it(parse and store) and then continue reading from the response and continue this process until the connection is closed. Would this be like a asynchronous request instead?
CODE:
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Jul 5, 2010
I'm going to design an Application (C# or VB.NET) which use .NET Framework to run for very long time. It may be restarted every year or even more...Is there anything (using special design patterns or so) which I must care about in designing "Long time running applications in .NET"?
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Apr 1, 2010
I've been using things like FileOpen, and FilePut for a long time in VB.NET, and it's never presented any problems. However in my latest project I'm using CodeDom to compile at runtime, as you know FileOpen, and things like that are the old VB6 methods, such as MsgBox("Msg"), and these don't work. So I need to know how to do this using only the newer VB.NET code.
[Code]...
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Dec 8, 2010
I'm looking for the equivalent to a Java System.currentTimeMilli(), in VB.NET.What is the method to call? I know about Datetime.Now, but not about the actual conversion to long milliseconds.More details about my specific need: I need to manage a login expiration. So most likely when I log in, I will set a "expiration_time_milli", equal to the current time + the timeout value. Then later, if I want to check if my login is valid, I will check is "expiration_time_milli" is still superior to current time.
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Dec 7, 2011
I wrote a program which loops through a very long CSV file (50 meg) and parses the data as it goes.Sometimes, the program aborts and I get the following message:The CLR has been unable to transition from COM context 0x37a090 to COM context 0x37a200 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.
I know its going to take a while. There are several hundred thousand lines of text in the file that this program is reading. I am not sure exacly waht the message means, but my program seems to work fine other than the message. odd thing is sometimes the message doesnt always pop up..
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Sep 7, 2011
This is not useful, but:If you like Mayan culture,This code convert an integer in Mayan numericals
It can convert in the "Normal Count" system and in the "Long Count" system.In the Normal Count", every glyph is a power of 20, with the most significant on top and the less significant at the bottom
The "Long Count" system was used in Calendar. In the "Long count", every glyph is a power of 20 except the third glyph from the bottom, which is a multiple of 360. This was done because the years were, at the begining of the Mayan culture, estimated to be 360 days.Since I couldn't find a Mayan font, the function returns a bitmap that contains the drawing of the glyphs that represent the mayan numerical
[Code]...
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Oct 28, 2009
I've a solution with 15 projects (14 class libraries and one web application). Each class library has corresponding test project (i.e. if I have MyApp.Services project there exists MyApp.Services.Tests -- using NUnit). Everything is written in VB.NET. The problem is that when VS tries to compile any of *.Tests project it stops responding (the bigger the project the longer the period without reposnse). I don't know where to start looking for an issue. I'll add that I've R# 4.5 installed.
UPDATE 1:Is there any way to benchmark a build in visual studio? To get build times for every project?
UPDATE 2:It seems that there is no difference after disabling R#.
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Mar 10, 2009
Occasionally, my website will stop functioning and anytime an ASP page is accessed, the browser will hang for many minutes before bringing up a correctly formatted HTML page with nothing in the tag. It seems to happen whenever more than one person attempts to access an ASP page, but I'm not positive it's isolated to those conditions.
Let me emphasize that the issue does not arise when accessing directories/HTML pages/other files. Only ASP pages are the problem. I am using lunarpages as a host.
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Apr 5, 2009
I have a problem with my (aspx.vb, aspx) program. Since my vb program require more than a day to make some data analysis. however, the page always run a long period(one hours exactly) will be downed and become cant display the page. i am wondering is it related to dns error?
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Jun 13, 2012
Actually, I am trying to find out whether the partno is existing in the database table or not and it takes long time in count = checkCommand.ExecuteReader statement
Public Function CheckProductNo(ByVal Partno As String) As Boolean
Dim count As SqlDataReader
Dim valid As Boolean = False
Using connection As New SqlConnection
[code]....
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Sep 9, 2009
I'm trying to time how long an operation takes in Visual Basic (VS 2008) but its not working. the code I have is as follows:
[code]...
this is in an OnClick event, so what happens is that the user can click a menu item, and it goes and sends any changes it has to a database, and pulls down any new changes to a local data cache. This operation takes time, depending on how many changes are on the server and how many are cached locally. I've thought about making this a background task, so it doesn't draw away from the main app while it's running, but before doing that, I'd like to get an idea how long the operation takes. Since I can't exactly do a progress bar, I figured using the stopwatch would tell me how many ticks/milliseconds would occur between click, and when the "total synced" message comes up, but every time i run it and do an update the message always shows 0 ticks/ms. I don't think it's accounting for the delay, just from start to finish. Is there any way to make it so it detects a message popping up and times off that?
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Oct 19, 2009
Is it possible to retrieve the date/time of a request in ASP.NET (preferably VB.NET)?
I have tried HttpContext.Current.Request.Headers.Get("date"), but it returns nothing (null).
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Jul 6, 2009
I have a backend database in MS access, which is updated using excel as front end. Due to network issues the record updation takes lot of time. Would it be faster if i use VB.net as the front end.
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Jul 6, 2009
I am on one asignment of convering C# to VB.net and stuck up with this problem.C# application has one class having inline two dimensional array initialized with size 168X168. I converted same class to Vb.net. Now whenever I create instance of my this VB.net class, It take almost 3 minute.
To figure out problem, I put break point on sub new() (first line of my constructor), and behaviour is realy strange because it takes 3 minutes to reach at first point of my constructor.Whenever I comment out my large size array initialization code, It works perfect. Now please note that same code is working fine in C#. It is not taking even few millisecond to initialize that class.
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Apr 19, 2011
I'm trying to make a macro for a game, so I use long spells in a shorter amount of time. I'm having trouble with a lot of things. For starters I get the when I start the programs timer: "A call to PInvoke function". (I'm calling it a hack, but it's not a hack because it doesn't hook into memory addresses, only sends keys when the correct combo are pressed)
Option Strict On
Public Class Form1
Private Property hEnabled As Boolean
Private Declare Function GetAsyncKeyState Lib "user32" (ByVal vkey As Long) As IntegerPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If (hEnabled = False) Then
[Code] .....
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Apr 18, 2011
I am using the below code to get the local Administrator members, but this code takes about 6-7 seconds to execute. More precisely the "GetObject" takes that long.Is there another way to get the same information but faster?Also, where can I find what other properties the objects holds ? (To see what other useful information I can get)[code]
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Feb 10, 2010
Whenever I publish my app, or when I run the exe from teh debug folder it takes a couple of seconds before the splash screen shows.However, when I run it from within VB (by pressing the "play" button) the splash screen shows immediately.
What could be the cause of this?
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May 14, 2010
The fact is I'm making an application, which users can install by using a Setup file...once installed the data in the database can be updated by a centralized server. To do this, they can insert a DVD/CD-ROM and export the necessary data towards it. I need to do it that way, because some of the users who really need this data will be using stand alone computers.The application gets it's data from a mdb-file and the connection remains open as long a person works with the application (maybe not the best way to do, but I know :-) )...when the user uses the application, he can perform an export...this exports the .ini-file and pictures (which works fine), but he also needs to export the mdb behind the application...I already tried connection.close() before and connection.open() after the System.IO.File.Copy...but that doesn't seems to work.
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Aug 29, 2011
I am writing an application for managing mp3 files. I use AXWindowsMediaPlayer1 for playing files and UltraID3 for reading and writing ID3 tags. Every time the user selects to switch to next song, the ID3 tags of the current file need to be updated. My problem is with Media Player taking a long time to release a file for access after doing a "close". Currently I need to add a 6 seconds delay between the "Close" method of the media player and the ID3 tag "Write", otherwise I get the error saying that the file is currently in use. Anything less than 6 seconds does not work...
I attached a short version of my application which focuses on the issue.
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Mar 14, 2012
MVC3 vb.net. In my app I have a point where 500+ emails with attachments are sent out using a for each loop to accomplish this.. Nothing is returned to the browser the entire time this is running so eventually the browser think it has timed out... I tried just having it redirect to another actionresult function after every email and that function just passes it back to the email function. This is not working and I feel the reason is that nothing is actually being sent to the browser window its self.. Is there a way to fix this issue??
[Code]...
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Aug 1, 2011
i have developed an application using OPEN XML SDK Tool 2.0 which generates Excel file. I have Data table of 100000 row and 30 columns and i want to generate excel file with these 100000 rows and 30 columns but it takes about 2 minutes of time to generate excel file. What can i do to reduce this time.
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Oct 3, 2009
Are there any users here who have programmed for the Samsung Epix (SGH-i907)?I'd like to know what screen resolution* is typical for the Epix. It's not exactly the average screen size as when I used default settings I ended up with a scroll bar.*Does the application take note of the top and bottom toolbars as well or should that be disregarded?
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May 12, 2009
I'm currently in VB class at my highschool and we just got chapter 6.1 to read on this online textbook that we follow. Anyway, we are doing loops now and the problem reads "Write a program to request positive numbers one at a time from the user in an input dialog box. The user should be instructed to enter -1 after all the positive numbers have been supplied. At that time, the program should display the sum of the numbers." So far I know this much
[Code]...
Now I know this isn't right But I can't find out how I'd pull out the numbers the user entered to get the sum of them and not include -1 because as it stands, when I hit ENTER with -1 the label just shows -1.
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