I am new to the forum. This looks like a cool site! I have a bit of experience in VB .Net, but not with threads or backgroundworker processes. I am sorry that the description is so long, I tried to make it as short as I can, but it is rather complicated. Here goes:
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I have a site developed using vb.net 2.0. It has a URL of like [URL]..I want to avoid any malicious requests using other URLs. I have tried to implement using the code below and would like to kick such requests out of the site on the page load. How can I achieve this?
If (urlParams.Contains("http") And
Not urlParams.Contains(Request.ServerVariables("HTTP_HOST").ToString)) Then
Would like to kick out of the site here.
End If
I have an AsynchFileUpload on my page and for some reason when I try to use it to save the file to the server it falls. The control will allow me to select a file locally and it displays the local file path in its text box, BUT when I then click a button on my page which I am going to be using to submit all details then upload the page everything goes wrong and I get a Null Ref Exception from the AsynchFileUploader.
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It seems that the filename is being lost somewhere after the button is clicked, or just never stored
in my button click event i ececure
If BackgroundWorker4.IsBusy Then
BackgroundWorker1.CancelAsync()
End If[code]....
after proceess completed if press the button again.i got the following error msg
This BackgroundWorker is currently busy and cannot run multiple tasks concurrently.
Is anyone else having or know of an issue with VB2010 Beta 2 just "hanging" on the install? I can find no documentation anywhere through searches.
View 5 RepliesI have a visual basic program wherein i fetch information from two textboxes format the output of the textbox in the required form and then make the output come as desired I use two arrays to read textbox 1 and 2 separately and then i use for .. next statement to perform the same action for all the lines in the textbox 1 and 2..
Both of them have equal no of lines..I have also give a progress bar in the form and assigned the max value as the number of lines and i have given the incrementation within the program for the progressbar..
When i run the program it runs quite well for certain instant of time and the progress bar also responds according .. After some interval of time the form hangs and the progressbar also hangs at that place..Later after some more time the form is back to normal and the process is in finished form with progressbar at 100%..
Is there any reason why the form hangs..If there was a major problem i must have not got the output at all but i do get the output after certain interval of time..Can this problem be solved??
I made a program that backs up data from the My Documents, Favorites, and Desktop folders on Windows XP to a server. When the data is brought down from the server, it brings it down in Windows 7 format. So, for example, the directory to My Documents in Windows XP is "C:Documents and SettingsusernameMy Documents." The same directory in Windows 7 is "C:UsersusernameDocuments."Everything works fine in terms of putting files and folders in the correct directory, but when bringing the data down from the server, the program sometimes freezes up and doesn't ever seem to get out of that state. It also makes the computer very slow and unresponsive after a while. Does anyone have any idea why this would occur?
Below, I have a code snippet of my copying code. I include a sleep command and a DoEvents command to halt the thread for a very short duration of time in order to make the UI more responsive.[code] I believe I may have to use some multi-threading to get this to work properly, but I've looked it up and cannot find out how to implement it in my program.
I have a datagrid which receives updates for every 1 minute from the database. Whenever it gets update my whole form gets freeze and I cant do anything. To add on when first I log in also the log in page gets freeze because the form is being loaded during the first time.
View 1 RepliesI am using the following code to receive data from a Public Address Controller.the programme sends data...waits for a reply....send more data...waits for a reply..etc.
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is there some way of cancelling the BeginReceive after a delay so that the programme can carry on and inform the user that something is wrong and terminate gracefully?
Here is vb.net 2008 code is: Public Function CheckURL(ByVal URL As String) As Boolean
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when a url is processing in checking it hangs my application for a while. Is this possible it checks smoothly all url list without hanging my application.. Is there any other fastest way to check urls? Note: I have about 800 urls in file to check all links a valid by website responce or not.
Creating an application that uses both namedpipes and TCPIP connectivity to pass data between 2 legacy applications.
When there is actual data to pass everything works great. But when the application is looking to see if there is any data to read from the named pipe side and there is no data, the Peek hangs until there is data. Is there a problem in the way I have it coded or is there a timeout that needs to be set?
Code:
'
' declarations
'
Private in_pipeName As String
[code]....
I would like to place a brush under the cursor as I move the mouse around a picturebox, so the person can see what they lay down when clicking. How could I do this. I am working on a custom scribble application.
View 1 RepliesI have a windows forms app (32 bit) written in VB2010 which occassionally hangs in windows when minimised to the task bar You click on the icon on the taskbar and it will not come back up on the screen
No other modal forms are open in the application when the hang occurs Other programs respond OK
I ran Process Explorer against when it was Hung but do not know how to interpret the stack page, or even if it is helpful STack page with my application selected and Threads tab selected with CSwitch Delta column sorted descending. Then double clicking the top entry (my application .exe)
Note: This is running on an x64 machine, but also hangs on x32 machines
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software developed in vb.net(communicating with serialport) hanging and it is giving these rexceptions 1.The device does not recognize the command2.Unhandled exception has occurred in your application. If you click continue, the application will ignore this error and attemptto continue. if you click Quit, the application will close immediatly
View 1 RepliesI'm not sure how to explain what's happening but it seems to be deadlock, i did search along the forum and actualy did find who had the same problem as i did. Unfortunatly i'm too new to this Threading and could not understand why does this deadlocks happen or how to avoid them.I'm using the following
Dim t As New Threading.Thread(AddressOf MyTestingSub)
t.Priority = Threading.ThreadPriority.BelowNormal
t.IsBackground = True
[code].....
Edit 1: Uninstalled & Reinstalled Edit 2: Same problem. Seriously? Yes.I am having a problem with msvb7.dll eating 50%+ cpu on my dual core system. This usually lasts 10-30 seconds or so, during which time the IDE is non-responsive.
This occurs when I do pretty much anything in the text editor, and can be replicated by simply adding blank lines to a function, and then deleting them. Or pasting some code. Or... lotsa stuff.
SP1 installed I had DevExpress' refactor/coderush, components, and codeit.right installed, but have removed all 3 of them. (I had installed the latest version of Refactor Pro! (9.3.4), perhaps the day before)
I have tried a VS.NET Repair. There is a kb that referenced some cpu destroying with vb, but it was included in SP1
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I have a really simple form with a button that fires a Sub I created which gathers data from ActiveDirectory and adds it to an Excel Sheet. The problem is, when I click this button the whole form hangs. So I figured the operation that gathers the data and adding it to the Excel sheet should be run in it's own thread, so that the form won't hang. Possibly it would be great to add a progressbar as well. The progressbar however is located at the Main userform that starts up once the projects is run.
I've got one MainForm.vb and one CodeFile.vb. I want most of the code in the CodeFile.vb so it's tidier.
MainForm.vb
Imports User_edit.CodeFile
Imports System.ComponentModel
Public Class MainForm
Private Sub btnImportData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnImportData.Click
[Code] .....
Notice the ExportFromAD Sub I've got in the CodeFile.vb. This is what is actually doing the work. In the For each loop that adds data to the Excel is where I've put the MainForm.MyBackgroundWorker.ReportProgress(i * 10). Problem is, it doesn't actually update the label on the form. Which I find pretty weird because the form isn't really hanging or anything. Is it trying to access a different thread or something? Meaning, the form is run on it's own thread which can't be accessed from my second thread?
Yesterday I worked on an MVC 3 project in Visual Studio 2010 and then shut down Visual Studio before leaving work.This morning when I try to load the same project in Visual Studio the project hangs. I have restarted my computer, disabled all add-ons and extensions that I could. Still no banana.I would try to clean the solution if I could get it to load but I can't.
View 2 RepliesSetting a hanging indent using full word automation. I am using word 2003 and vb 2005. I am inserting paragraphs in the document and I am having some difficulty getting the whole paragraph to indent.
View 8 RepliesI have a vb.net 2010 windows forms application (32 bit) which is hanging regularly on SOME computers, mainly when minimised to the task bar
View 6 RepliesIs it possible to wait/suspend execution for a certain amout of time without hanging the main UI thread?
View 7 Repliesi'm in the need to start a backgroundworker inside another one.Now...The first one BGW starts a for cycle, and inside this one there is the second BGW that has to upload an image to a server.The trouble is that, the progress event and the complete event of the internal BGW are never called.
View 11 RepliesI am trying to write code for a login to my program. But the code I have written freeze's the screen. Basicaly I want to check if username (TextBox1) has text in it and then check if password (Textbox2) has text in it. if either textbox has no text then a MsgBox show's with an OK Button. and then I dont want the program to run. I want The login form to reload so the user can insert thier username & password. the code I have is below.
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I have to send a request to Webservice and I have a working PHP solution, that I have to translate in VB.net
Here's the code working in PHP
//fill in the details of the contacts.userId is obtained from loginResult.
$contactData = array('lastname'=>'Valiant', 'assigned_user_id'=>$userId);
//encode the object in JSON format to communicate with the server.
[code]....
Naturally I imported a reference to a Json library and Imported (Imports Newtonsoft.Json)?
The following code works fine but seems to leave instances of excel.exe running in the background. How do I go about closing out this sub properly?
Private Sub ReadExcel(ByVal childform As Fone_Builder_Delux.frmData, ByVal FileName As String)
' In progress
childform.sampleloaded = False
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I'm doing a big loop in my program and throughout the loop I'm updating the textbox in the form.
However the form "hangs" untill the loop is done. How can I keep the form visible and be able to read the updated textbox while the loop is still running? I tried Me.Update() but it didn't work. I'm sure there was something like processdata or something like that but I can't find it anymore...
Example
For x = 1 To 10000
form1.textbox.text=x
Me.Update()
Next
I have a series of methods being called for my networking code. An event gets fired from the networking thread. Inside this event, which I've hooked into from a singleton class, I route messages to form level methods which they register on form load to handle certain messages they care about. Inside of these form message hooks I need to close the current form (which I was able to do) but also show a different one (which is giving me the trouble).
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we had developed a webservice in vb.net,framework 2.0. We would need to rewrite this websevice in WCF with framework 3.5. Please provide some guidance regarding this and also there are many othersystems consuming our webservice url. Will this conversion have impact on the source system or does it involve any build activity for the source system to consume the url that will be developed with WCF method?
View 3 RepliesI have a search engine that will use a webservice to search through my database to find 3 specific things. I don't even know if it will work like this, but I have a dropdown list on my main page to select Product, Feature, Description. From what the user selects, the webservice should then go to an if statement to use the correct SELECT statement and find results for the search.
Will someone help me figure out how to fix what I've written to make it work? Please don't be too critical, I don't have a lot of experience. I have also been researching SQL Injection because I have a lot of code that is vulnerable so keep that in mind when you look at my code.
I can't get the blue squiggly lines to go away that are underneath the DropdownList1.Value instances on the WebService page.
WebService:
<WebMethod()> _
Public Function GetCompletionList(ByVal prefixText As String, ByVal count As Integer) As String()
Dim Feature As String = DropDownList1.Value
Dim Description As String = DropDownList1.Value
Dim Product As String = DropDownList1.Value
[CODE]..........................
Default.aspx page - Here I need the dropdownlist to tie to the database somehow.
<asp:ScriptManager ID="ScriptManager1" runat="server">
<Services>
[CODE]........................
I am trying to get subsonic to run work in a webservice I am not sure how to return the data. I only get the word Object in my results when It return anything instead of values. What am I missing?
<WebMethod(Description:="Method to retrieveCptCode subsonic List")> _
Public Function GetSubCptCodes() As CPTCodeCollection
Dim coll As CPTCodeCollection = New CPTCodeCollection()
Dim qry As Query = New Query(CPTCode.Schema)
coll.LoadAndCloseReader(qry.ExecuteReader())
Return coll
End Function