Winforms - Long Delay After Reading Events From WMI?
Jul 27, 2009
I have a windows user control that reads events from the application log of a remote server. I can read in the information alright, and it appears to happen very quickly, however the thread hangs up for about 30 seconds afterwards and keeps my application from displaying the log.
I am afraid that this is probably caused by my lack of experience in dealing with threads, but I cannot be certain. I am definitely open to any suggestions with my threading here.
The easiest way to see what I am referring to is when the btnClear_click event handler is called. After jumping through the threading worm hole, it goes to the LoadFilteredEvent method. The results load fairly quickly from the ManagementObjectSearcher, but it hangs up for 30 to 60 seconds on the next statement.
I am having a problem with an application which uses a couple of classes inheriting from background workers.One is used to write data to a database and the second is used to determine when the connection can be established again should the connection be lost.t all works fine most of the time on my machine apart from one occasion when I experienced the problem described below.But I've not been able to replicate that since then.The class which writes to the database contains a queue (a list)When adding an item to the database the planned course of events is:1 An item is added to the QueuedItems list.2. If the background worker is not busy then RunWorkerAsync is called to start it.
Dim Result As Boolean Dim Carcass As String Dim Delay As Integer = CInt(My.Settings.DatabaseRecoveryTimerInterval * 1000)
Do you know of a method to read dbf with filename more than 8 chars?I'm stuck here because all my dbf's have long filename and is located on another networked server. Copy and rename the dbfs to a short file name to the web server.
I've started making a Minesweeper game in vb.net using a dynamically created grid of buttons, which are stored in a 2D array. I have another 2D array (Boolean), that keeps track of whether a certain position is covered or uncovered. And I have an 'update grid' method that can be ran whenever, to update the grid, so that all that should be uncovered is uncovered on the screen.
I am looking to prompt the user to save data when they close a form window in a winforms application. I can't figure out how to trigger the prompt to the user, should they click the red box at the top right corner of the form.
My application currently has a boolean flag, that is set to True on textchanged event. So I will only need to check for the boolean value in whatever event is trigger by the red box.
I know that time delays have been covered before around almost everywhere. however a method that forgoes forcing the GUI to become temporarily non-responsive, is all but a myth, or at least to my findings. i have the need for a GUI program to delay before the next command, however using the current method, detailed following, it causes the desired effect however it dose make it much less polished as when you click anything else on the GUI it goes un-responsive for the directed time. [Code] make a sub called say Tdelay( milseconds as integer) and have it run a loop as many times as the milseconds variable indicates and each time making the thread delay for 1 milsecond and then update the GUI/form in some way, then re-loop.
Is there a easer way of coding in stead of wrighting long long paragraphs like this in one line [code]All of this is on one line and i got lots of info to put down.."The game will begin on your 16th birthday with your mother waking you up. Today you are to go to the castle for the first time. Leave your bed and open your dresser for a Strength Seed. "
In Visual Studio 2008 I am using :Private Declare Function BlockInput Lib "user32" (ByVal fBlock As Long) As Long To stop input from occuring during a search-replace operation.
BlockInput(True) ' do not allow input during search and destroy Dim cursorIcon As Cursor cursorIcon = Cursor Cursor.Current = Cursors.WaitCursor
Then setting it to false at the end of the operation. It did not work, so I thought maybe it was because I was calling it from a child window, so I created a function in the mainwindow, and ran it like this:
FrmMain.BlockFrmMainInput()With these functions is the Main window:
[Code]...
It did not solve the problem. I thought maybe it was because I was running under the debugger, so I tried compiling and running it debugger-free, but that did not do any better. I am still getting input when I double-click the mouse on either form.
I have been trying to implement the jQuery weekcalendar using .net. What I can't seem to figure out is why weekcalendar states events.events is undefined after I make an ajax call to a webmethod I created which returns JSON. Below is the relevant code:
Is it possible to set a project default for VB.NET winforms projects so that the default Modifier for controls added to winforms is Private (not Friend)?I know there's a "modifiers" property in the properties window so I can set it for each individual control however I would like to change the project so from now on myself and other developers have to specifically decide to change from friend to private. (Which I would strongly discourage them from doing).I believe there is no way of doing this, but on another forum a while ago someone mentioned it would be possible with an add-in (but didn't name the add-in or where to get it).
I'm trying to figure out the best way to add delay. From looking online I believe a timer would work best but I'm having trouble with the code. Basically what I'm trying to accomplish is a GPI debounce set to 200ms. the Timer3 properties interval is set to 200 and its enabled = false. Here is what I am working on.
i'm developing an app where i'm reading a value from a device and putting it into a mysql db, i have setup a function where the vb will calculate whether the new value being read has changed by 3% from the last value and if it has run the mysql query. What i need to do it read the value into a variable, then a new value and compare the two with the % function, how do i read a value and maybe add a delay before reading the new value (and it being overwritten) and doing the calculation?
Here is my current code: Imports System.Data.SqlClient Imports System.Data
I'm working on a game that plays MP3s at various points using the Windows Media Player component and it takes a long time to load and play MP3s. Would anyone know how to decrease the load time? I've considered multi-threading but I'm not sure how I would do that or if that's even the proper direction.
I would like to enquire how I can set a delay in between chunks of code.For example, after some code which interacts with a server, I am supposed to get a corresponding information from the server before it is appropriate to proceed on to the next part of the code. As the server response is not immediate, therefore an arbitrary delay is needed.What is the proper code format that I need to add?
I am dealing with a web application that includes VB.NET (UI) & VB6 middleware (DLLs).One of our installs, a Win 2003 Server/IIS 6 environment shows a 2 minute delay after the application login page.The application has been added to Trusted Sites & is not in a DMZ. It uses Forms authentication.
I am looking for ideas on what might be causing the delay. The code is difficult to access and I would like to leave that as a last resort. I realize it's not much to go on but I am hoping someone here has run into a similar problem.
I created a control that has picture box control docked within it. This control allows me to "animate" the image by swapping them out by setting the interval to swap them at. I want to use this control kind of like an animated icon within a application, but because the picture box is docked, the control I created won't respond to the events, MouseHover specifically. [Code]
Code: Public Class Form1 Dim m As String() Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click m = TextBox1.Text.Split(Environment.NewLine)
[code]....
it navigates only to the last website [URL] i think that's because the for loop is faster that navigation process?
My dilemma: I have a POCO: "ReportSource" that is generic. I have a user control wrapping up some report building logic. My user control defines a ReportSource property but it will ultimately be the job of the page that calls the user control to assign that ReportSource property. How can I define the property in my user control without specifying a T? Btw, I tried (just for larks) to make the user control generic... That ended badly. public ReportSource<T> ReportSource {get; set;} (Note that I've tagged this as C# and VB.net... C# is my norm, but I'm having to deal w/ legacy.
Now there's a user "A" who has 100 followers...now what i want to do is whenever user "A" submits an article in the website all his followers should get an email with the article link...that is okay i can do it.
Problem: Now, there's a submit button on the page which stores the article in the DB and sends email to the followers...as there are many followers it takes a lot of time sending the emails...so the page keeps showing loading msg till all the emails are sent..how can i send all the emails asynchronously ??
i mean after the article has been submitted ...the emails should go automatically to the followers without putting the email sending function in the click event of the button....hope am not confusing you folks.
can i do something like store the article in the DB , redirect to the article page , start sending emails in a batch of 10 per 10 mins automatically...this process should start as soon as an article has been submitted by an user.
I am writing a project for class and have come across a problem that I have been unable to solve and am loking for a little help. What I am trying to do is to implement a half second delay every time a flipper is flipped or reset. My example code of The flip and reset is below.
' Flipper 1 code If Flipper1.droppedLeft = False Then Flipper1.flip()
I tried to convert my VB6 code to VB2005 and it seems like some syntax cannot be use. I had tried to make it work but it still failling me.how to create a delay timer which can delay up to 5 hours and this will repeatly in 10 loops.
Is there a way to delay the start of a text file? I am using this to call the TXT file after clicking a button: (opens txt file)Process.Start("text.txt")I was wondering if there was a command to delay the TXT file from opening for a number of seconds?
