Access To Very Precise Timing In A .NET Application
Oct 13, 2009I need access to very precise timing in a .NET application. I need microsecond precision. Is there an easy way to do this in .NET?
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How To Get Precise Dates From Using SQL Query
Jul 31, 2010I have made a simple program in VB.Net.In this program I made two DataTimePicker with the names of
1. DtpFrom
2. DtpTo
I want to get the dates from tblStudents between the dates given in the dtpFrom and dtpTo.The Date Format for these two DateTimePicker and in tblStudents is "M/d/yyyy".When I run this query.
"Select AdDate from tblStudents where AdDate >= '" & Format(dtpFrom.value,"M/d/yyyy") & "' and AdDate <= '" & dtpTo & it gives me some times correct results but some times it missed some of the dates. I want to get the precised dates, without missing any date. So is there any Mechanism to solve this Problem.
Running Access - Application That Has An Ms Access 2007 DataBase Which Runns Great If Access Is Installed
Oct 15, 2011I have an application that has an Ms Access 2007 DataBase which runns great if access is installed. Is there any code that I can use in vb that I would be able to run access with out installing it.
View 5 RepliesHow To Approach A Timing
Dec 15, 2011OK, I have this loop I want to perform which involves the serial port. Not to get too specific I'm actually sending data to an external device within a loop The loop involves a Start number, increments by a Step and ends when it gets to Stop This repeats until I click a STOP button.
View 15 RepliesADO.NET Timing Out On Stored Procedure?
Aug 11, 2009I have a stored procedure that when I run it within my application it times out, but when I use Management Studio and pass in the same exact parameters, the stored procedure executes under a second. I had this exact same issue with the same stored procedure before, and all I did was recompile it, and it fixed the problem, but I do not want to keep having to recompile this stored procedure every few days or so. Has anyone else ran into this issue before?
Another note I would like to mention, is that I'm currently working on a test database, so I'm not inserting, deleting or updating any of the records that the Stored Procedure is using. So the database itself is not changing, but for some reason the Stored Procedure is showing degradation, and at the most we have 2 users in the database at a time.
Below is the code I use to call the Stored Procedure from my app.
cmd.CommandText = "sp__RECAP_SELECTION_GET_GRID_RECORDS_RECAP_TYPES"
cmd.Parameters.Add("@FK_KitchenID", SqlDbType.SmallInt).Value = cmbKitchenCustomer.KitchenID_SelectedPrimaryKey
[Code]....
As I mentioned, if I run the Stored Procedure within Mangement Studio, it runs with no problems. Also if I recompile the stored procedure, it runs fine within the app, but after a few days, the stored procedure starts to timeout again within the app and I need to recompile it again.
Com Port Timing Out After About 2 Days?
Mar 18, 2011The program operates a board and activates relays when the buttons are pressed, the code works fine and i have published it to use on a PC however, after about 2 days the port times out and it stops operating the port, am i missing any code such as close port anywhere.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
Combo AutoComplete Timing?
Apr 22, 2009I use combo boxes with the Autocomplete turned on (Source = ListItems and Mode= SuggestAndApplend). The problem is that if the user stops typing for two seconds and then continues typing, the Autocomplete starts matching only on a new characters being typed. For example, I have a list with two items: "apple" and "please". I type "ap", then pause for a couple seconds and then continue typing "ple". I want the list to match on "apple" but instead it matches on "please". I'm looking for a property or some way to set the length of time the control resets the matching. Do you know if one exists?
View 6 RepliesWebbrowser Timing And Refresh?
Nov 17, 2009I am a complete noob at programming, so I need all the help I can get with my new program.I am building a web-browser which is linked to one webpage. The content of this page is constantly changing, so I need the web-browser to auto-refresh after 2 minutes. But if it refreshes while NOT connected to the Internet, the browser will show an error message, so that is why I have build in an Internet check. This check is working. The browser also have to be in the same place at the screen every time the software is loaded. This code is also working.
But the timer and the refresh is bugging me. I cannot get it to work. The code is not responding.
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Checking For Changing Values Timing?
Jan 14, 2010Im trying to check to see if a value of a label changes over time. however I can't seem to get it right.
dim val1 as string
dim val2 as string
private sub form1_load()
dim val1 = label1.text
end sub
[Code]...
problem is it will only check it once after ten seconds when the timer is set to 10 seconds i need to to check it every 10 seconds becuase these values display altitude, and if the server freezes the altitudes dont change. I need to make sure they are updated and not frozen.
Communications :: SerialPort Timing Control
Feb 17, 2009I am using VB2008 SerialPort to communicate with a device. My problem is, using RTS handshake I am missing the first 50 or 60 chars, after that everything is intact. I tried to change the buffer size - Has no effect, used standard, bigger, smaller and no change.
The device timing says when it sends CTS signal, it will start listening 100ms after that. I have no clue how to delay the write to test this. Should I first write to the buffer then write to the port after a a 100ms timer event?
Determine Why A Distributed Transaction Is Timing Out?
Nov 10, 2009I am using LINQ to SQL and a third party SDK that supports distributed transactions. When I realize that a pending update will be updating both SQL records and records in the third party SDK, I am creating a TransactionScope with a 0 (presumably infinite) timeout (although I've also tried 12 hours as a timespan parameter). Then I use GetDtcTransaction on the ambient transaction (created by transactionscope) to get a DTC transaction to link to the third party SDK. Things work nicely for about 10 minutes, but after 10 minutes, the transaction disappears and an error occurs. How do I determine why the transaction is disappearing. I suspect it's a timeout because it regularly occurs after 10 minutes even though slightly varying degrees of work have been done at that point. But I'm at a loss about how to determine what terminated the transaction, why, and how to extend its life.
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How To Compare A Timespan Value With The Current Timing
Mar 21, 2011I'm currently struggling on how to make a comparison between a timespan value and the current time.I went up to here, but the comparison totaal with the current time doesn't work .
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Timing A Method From Execution To Completion?
Mar 6, 2012So, I got an SSD drive for my computer the other week, and decided to have a little fun. I wrote a program which starts every single program in the Windows Programs folder in the Start Menu, via clicking the "Go" button on my Form. It works beautifully. Only thing I would like to add to it is some sort of timer, which I have never tried in any programming language. I would basically like for a timer to be running, counting in real time (seconds), until my loop ends, and then display the total time taken at the end. I was thinking about setting a variable equal to the current time, before the loop starts, and then another equal to the time right after it ends, and then taking the difference of the two.
View 7 RepliesVS 2008 Hiding A Control On Timing?
Dec 11, 2009Is it possible to hide some control on timer event. Initially when the page loads, i am label control on the form. So after some seconds, can i able to hide that label?
View 5 RepliesSql - CommandTimeout Seems To Have No Effect Queries Still Timing Out After 30 Seconds?
Sep 8, 2011Our production database as grown to a size where several of our longer running stored procedures are taking more than the default 30 seconds to complete. I've programatically set some of the CommandTimeouts on the command objects but the calls to the store procedures still appear to be timing out after 30 seconds.
Here's what I did:
In web.config set this property
add key="CommandTimeOut" value="180"
Added this to the top of my class that needs the timeout set:
Dim COMMAND_TIMEOUT As Integer = ConfigurationManager.AppSettings("CommandTimeOut")
After creating the command object set the timeout property on the object.
cmd.CommandTimeout = COMMAND_TIMEOUT
Unfortunately my stored procedures still seem to be timing out when they take longer than 30 seconds to execute.
VS 2005 Windows And Timing Routine Not Working Together?
May 2, 2009I have a timer routine (basically just a timing loop) that moves shapes around the screen. The problem is that it isn't in sync with Windows (Vista). If a Windows background program runs (like an antivirus) the screen goes gray. The timing routine still runs but the display is shut off. Only when the shapes are done moving does the screen return to normal (but I didn't actually see the shapes move). Another good example of my issue is when I finish debugging and press the Start button, again I don't see the shapes move, I just see a grayed out screen with the cursor in "busy" mode.
All the other VB.NET programming I've done doesn't assume so much control as this timing loop. I've never had to worry about coordinating a routine with other windows functions. What's the trick to getting this stuff to work together smoothly?
VS 2008 : Webrequest Post Method Timing Out?
Sep 26, 2011Why does this code works for the first few then gives timeout on all the rest ? VB removed, resolved like when i run it with say 50 threads, the first few work fine but then the rest after that all time out, i have tryed moving the ones that work to the bottom of the list but they still timeout after the first few are done.
View 2 RepliesWebservice Timing Out - Unable To Transition From COM Context
Nov 3, 2009I added a web reference to my VS 2005 console application [Code] The call to this WS times out with :"The CLR has been unable to transition from COM context 0x1a3008 to COM context 0x1a3178 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 used WCFStorm to call this WS and the result comes back in an instance, so I don't think the WS is a problem. I deleted the web reference a few times and added it back again. did the clean and rebuild operations.
Keeping Browser From Timing Out In Mvc3 App During Long Processing Time
Mar 14, 2012MVC3 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??
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Serial Port Timing - Reading Large Flash Contents
Feb 10, 2011I am having an issue with serial port timing when using it to read large flash content. If I slowly step through the code the program works as expected. If I let it runs by itself it only shows part of the result. The problem is not related to displaying the data on the form but mainly the "Serialport.BytesToRead".
Here is the code
Private Sub MemoryReport_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MemoryReport.Click
Me.BackgroundWorker1.RunWorkerAsync()
'Memory_Report()
'SerialPort.DiscardInBuffer()
[Code] .....
Timing Code - Measure The Performance Of Seven Sorting Algorithms In A Single VB 2008 Program
Sep 15, 2010I'm trying to measure the performance of seven sorting algorithms in a single VB 2008 program. I've tried using a Timer componend, the Stopwatch, and DateTime.Ticks but nothing works. The following simple code produces a result of about 500 (milliseconds), which is correct, but when I change 500 to 1000, I get a ridiculous result like 0 or 8.
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Project Using VB And A Database In Access - Check If My Application Requires Access To Be Installed Or Not?
Feb 16, 2012I'm using VS 2010, and I did a project using VB and a database in Access. The problem is that when I try to put that "application" on other computers, sometimes, is not working. I thought it can be because on these computers they don't have access, but on one computer, is running another app which is using Access and there is no Access installed. How can I check if my application requires Access to be installed or not?
Here is a example of how I did the connection:
Public AccessOLEDBConnString= "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & myfullpath & ";Jet OLEDB:Database Password=password"
Function getConnection() As OleDb.OleDbConnection
[CODE]...
And when I want to have access at the data I'm doing like this:
dim conn as Oledb.OledbConnection
dim sql as string
dim ds as Dataset
[CODE]...
Converting MS ACCESS Application To Windows Forms Application
Jun 23, 2010My boss gave me an MS Access application that was developed by our former colleague. He wants me to convert that application to VB.Net Windows form application. I went through the MS Access Application. It contains tables, queries, forms, reports and macros. I could not find the programming (Where is the code written in MS Access?). My boss wants the windows application to be same as the MS Access Application (both in design and logic). I don't how will i develop the windows form. How can I achieve this?
View 2 RepliesConverting MS ACCESS Application To Windows Forms Application?
Jun 23, 2010My boss gave me an MS Access application that was developed by our former colleague. He wants me to convert that application to VB.Net Windows form application. I went through the MS Access Application. It contains tables, queries, forms, reports and macros. I could not find the programming (Where is the code written in MS Access?). My boss wants the windows application to be same as the MS Access Application (both in design and logic). I don't how will i develop the windows form.
View 4 RepliesAccess Application Properties Of Application In Run Time?
May 19, 2010Is it possible to access Application Properties of my applicaiton in run time ? Please refer the below attached image (I want to access the Title and Category properties in my application)
View 5 RepliesAccess Datagridview's Value Of Third Application By My Application
Jul 18, 2010I am developing a project in which i have to access datagridview's value into my application
Now i am able to get the handler of window
i am also get able to handler of datagridview.
i am used findwindow & findwindowex functions
Now i want some guidelines :-
1.How i can access Column Count
2.How i can access row Count
3.How i can access values of datagridview
for listview there are built in class in win32 named as syslistview32
Is there any class for Datagridview?
Or By which Window class handle datagridview?
Or tell any other way to access datagridview values of Third Application By My Application.
Access A GUI From Within A Application
Feb 25, 2009I need to be able to interact with an application's GUI within another application. Basically, I would like to run an application and have it's GUI appear in a MDI-style Form in my application. Is such a thing possible? The reason I need to do this is because I need to access an application remotely without having to use Remote Desktop or similar tool. Any questions on this, feel free to post.
View 2 RepliesAccess An Appsettings Key Value In .net 2.0 Web Application?
Jun 17, 2011I've trying to access an appsettings key value in my vb.net 2.0 web application.I've put the key in the app.config file:
<appSettings>
<add key="DownloadURL" value="http://<myURL>/" />
</appSettings>
I've followed the instructions here, and it says that I need to access this key like so:
URL = System.Configuration.ConfigurationSettings.AppSettings("DownloadURL")
But I get the following message:
Public Shared Readonly property
AppSettings() As
'System.Collections.Specialized.NameValueCollection'
[code]....
I tried to replace the old method with the new one, but it does not exist.Strange, since I've done a similar thing with a web app and it did exist there.
Autoback Of MS-Access Using .NET Application?
Dec 1, 2010I am creating a VB.NET application with the back-end of MS-Access. I have created manual backup of database.But now i need the help to create an automated backup of the database in the same application.
View 1 RepliesUpdate Access From .net Application?
Mar 11, 2010im trying to update access from vb.net application. when excuting im getting this error: the microsoft.jet.oledb.4.0 source="c:...."provider was not registered on the local machine. when i go and run cmd to register ddl files. i was able to register msjet40.dll and msjetoledb40.dll with the other dll a box pops up: the module "c:..." was loaded but the entry point dllRegisterServer was not found?
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