I wrote a small application (150kB) which controlls 2 comports, is sending and receiving messages from both sides and is able to write/read into a text file. My problem starts after I run the application for 2 hours or more. The PC starts to be really slow, it takes ages to even open a folder. What can be the reason? I understand, there might be something in the buffer; how can I clear the buffer from time to time.
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I just installed the .Net4 update from Windows update. (KB2416472) Date last published: 9/30/2010
Now when I boot up it takes almost a minute before apps loaded are usable, for example Avast virus shows its not in full protection mode, you can't access any apps I made that are in the tray, even the LAN is not active or in the tray, before the .Net4 update I could access these apps instantly. The update also adds another file to the running processes called mscorsvw.exe. (yeah more bloatware!)
I have a back-up image of my C: drive so I restored the image twice now and installed the .net4 update and see no difference, it still slows everything down on boot, on WinXP anyway, haven't tried it on my Win7 PC yet. Just curious if anyone else noticed any abnormalities with the .net4 update that was just released.
I have a strange issue when using WindowsImpersonationContext.
Whenever I use Impersonation in a Windows Forms and the Main Form loses focus, all of the controls freeze up and their events are either not triggered or take too long to trigger. This only happens when I use LogonUserA with a user that is not the current[code]....
I'm using Visual studio 2008 and microsoft sapi in a forms application. I am using text to speech which works just fine however when the computer is speaking it "bricks" the application and the main ui is unresponsive until the computer is done talking then everything returns to normal. To counter this issue I tried using the background worker thread to establish the sapi on another thread however the form is still freezing when the computer speaks. I would like to note that at this point there is nothing on the form except a tabbed window and a few buttons the form is not performing any code what so ever other then the text to speech.
View 18 RepliesI am using the BGW to run a long loop of several thousand records against several thousand records. If I open another form in the project then the process slows down dramatically, that is because in the Form I am opening has a DGV tied to Table that is being used in my loop process, so I understand why the process slows down.
What i am wondering and experimenting with is how to close the form and have the process resume to "Full Speed" if possible
I tried Closing the form verse Hiding it and DGV.DataSource = Nothing
Thinking that would unbind it?? and free up resources?
all of a sudden my program just doesn't seem to work like it used to.[code]It searches the picture box for the color that you tell it to, and it moves and clicks the mouse at that pixel. Well... it used to do that, now it just locks up and won't respond for about 20 seconds.
View 1 RepliesI found a strange issue with the combination of RichTextBox and RegEx.If I load a text file into a RichTextBox and use
Dim matches As MatchCollection = Regex.Matches(RichTextBox1.Text, "^H(.+ ){10}
", RegexOptions.Multiline Or RegexOptions.IgnoreCase)
then the RegEx will run blazing fast.OTOH if I load the text from a file straight into a string and feed this string with RegEx.Matches using
Dim FullText As String = New StreamReader("c:TempTextFile.txt", System.Text.Encoding.UTF8, True).ReadToEnd
Dim matches As MatchCollection = Regex.Matches(FullText, "^H(.+ ){10}
", RegexOptions.Multiline Or RegexOptions.IgnoreCase)
then the regex will run for ages.Now obviously the RichTextBox does something to the text. I found that loading the text into the RichTextBox will eliminate the first 4 bytes of the text (is that the byte order mark?). However, trimming those 4 characters with SubString won't solve the problem. RichTextBox does some other processing that I'm unaware of.I'm using RegEx both on client and server side (client can load text files into a RichTextBox to test and setup various RegEx's and the server will process text files according to these previously setup RegEx's). Needless to say that a regex will run blazing fast on the text file loaded into a RichTextBox, while the very same RegEx ran through the very same text file will seem to lock up the server side service.My question: what kind of text processing does the RichTextBox do and how can I mimic the behavior in a server-side process?
As a preface, I am brand new to using SQL Server 2005; I know how to use the SELECT, UPDATE, DELETE, and INSERT commands and that's about it. I am also using Express Edition on my local PC (E8400 processor, 8GB of DDR2-800, 2 x 640GB SATA-II HDD in RAID 1)
I have a table that I set up with 8 columns, all are NVARCHAR(Max) and I allow Null. I know in concept what a primary key is, but I don't have one (nor do I know how to set one up).
My VB.NET program that I'm working on is downloading a historical stock price chart from Yahoo, for every single ticker symbol in existence. The first 50,000 rows or so I added was super fast. Then I went to bed, and when I woke up it was still running - but the rate of row additions has slowed waaaaaay down; I noticed this around row 300,000. I always expected the rate of row addition to be constant over time, but obviously this is not so!
From browsing other Stack Overflow questions, I suspect my slow down is related to my piss-poor table setup. If this is the case, where should I begin first to fix this, and are there any good resources I could read up on to get started? I'm hoping this is something simple I can fix [code]....
I just finished working on my school vb project - breakout. As soon as i import background my ball speed slows down dramatically. I used 1.25mb bmp, 40kb jpg, and lower resolution copies of both but i get the same result. In my game i use bitmaps for bricks, platform and the ball along with a timer and draw e.graphics function. How can i illuminate the reduction of the speed of the ball when i add my background?
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