I read Accessing Controls from Worker Threads and implemented this
Private Sub myExplorer_Close() Handles myExplorer.Close
If Me.InvokeRequired Then
Me.Invoke(New MethodInvoker(AddressOf myExplorer_Close))
[code].....
This code works fine in VB 2008 attempting to redo the program in vb2010:
in the GuiForm:
the following is declared in formgui:
Private Delegate Sub UpDateGSLDelegate(ByVal rpn As Integer)
Also the following sub is also in formgui:
Public Sub updateGSLDisplay(ByVal rpn As Integer)[code]....
"UpdateGSL", in turn, will be called from any subs running in another module in a separate thread.The purpose is to update one or more labels on formgui based on the "rpn" variable.now the program will just hang at " Invoke(New UpDateGSLDelegate(AddressOf UpDateTheGSL), rpn)" in the "updateGSLDisplay" sub. no error messages, just stops.also I'm now using the " Dim t1 As Task = Task.Factory.StartNew(Sub()" way to starting a new thread in case that is revelant.what has changed from 2008 to 2010 to cause this. Just started trying out vb 2010? How can I fix this in 2010?
I looked at this page: http:[url]...aspx but it doesn't say anything or maybe it does and I just didn't pickup on it.
I've got the following code:
[code]...
The problem is that, when I call the "SetStatusBarText" sub from another thread, InvokeRequired is True (as it should be), but then my threads stall on the Me.Invoke statement - pausing execution shows them all just sitting there, not actually invoking anything.
I have a filesystewatcher object. On it`s event it runs a procedure which fills a treeview with a data. I had problems with treeview methods, but when I run them using invoke method everything is ok. But I still have one problem. When I load the form for the first time, everything works fine. But, when I then close the form (me.dispose, me.close), and load it once again, when Filesystemwathcer start the procedure i have an exception "invoke or begininvoke cannot be called on a control until the window handle has been created" trying to run a treeview.invoke method?
View 9 RepliesWhat is Platform Invoke Service (P/Invoke)?
View 1 RepliesWe have a UI with a progressbar. I know how to invoke, safely, the control from which it was not created from a thread. there are threads being processed in a threadpool, all of which calls an "agent" (which is a notifier to raise an event back to the UI to then increase the progressbar). an "agent" is set as a property in a State object, which is then passed into a method which will be executed on the ThreadPool. so, I invoke on the UI the method to update the progressbar, but the bar does not seem to update at all (screen frozen) and it takes a very very long time for it to execute. without threading, no problem.
[Code]...
I am making a WoW automatic trial account creator and so far i have it so that on this link:
[URL]
it will fill out all of the information.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
WebBrowser1.Document.All("firstName").InnerText = txtFirstName.Text
WebBrowser1.Document.All("lastName").InnerText = txtLastName.Text
WebBrowser1.Document.All("emailAddress").InnerText = txtEmail.Text
[code]....
The only problem I am having is that when I try to make it automatically submit it isnt working because I can't find the id of the button. When I inspect it on the website it is a javascript button and I am not sure how to make it click. I tried
'WebBrowser1.Document.All("Submit").InvokeMember("click")
But it still didn't work.
I am using the under given code in a module and I am getting an error ['Me' is not valid within a Module]
[code]...
instead of using if control.invoke required in a procedure can I just call the procedure with begininvoke?I have, possibly, the following:
Private Sub UpDateTimer_Elapsed(sender As Object, e As System.Timers.ElapsedEventArgs) Handles UpDateTimer.Elapsed
UpdateTime()
If MicActive Then
PTTCancelTime += 1
[code]....
where is the best place to learn InvokeRequired and BeginInvoke.
View 4 RepliesI had a question about some logic of the InvokeRequired with a ListView. I have the following
vb.net
Public Sub ListviewSub If ListView.InvokeRequired = True Then Dim t As New MethodInvoker(AddressOf ListViewSub) picCurrent.Invoke(t) Else RunSub() End IfEnd Sub
[Code]...
Me.datagridview.InvokeRequired property means in vb.netadil
View 3 RepliesI have a (legacy) form where I had to add the InvokeRequired/BeginInvoke(Delegate) to avoid the "Control control name accessed from a thread other than the thread it was created on." exception.This seems to work fine but there are some scenarios where the BeginInvoke is not calling the Delegate (which I can tell from the output log). [code]
View 1 RepliesI have the following test code. It does nothing useful, but it's there for me to understand VB:
Imports System
Imports System.IO
Imports System.Diagnostics
[code].....
I am working with tasks, so I've got the following code to update a label on my form:
Private Delegate Sub UpdateLabelDelegate(ByVal s As String)
Public Sub UpdateLabel(ByVal s As String)
If Me.InvokeRequired Then
Me.BeginInvoke(New UpdateLabelDelegate(AddressOf UpdateLabel), New Object() {s})
Return
I've used this function to send email successfully
Private Function SendEMail(ByVal wholist As String, ByVal emailcontent As String) As Boolean
Dim emailSuccess As Boolean = False
Try
[Code]....
But with a new server my customer has that uses EXCHANGE 2010 it does not work.
I used TELNET to get into port 25 of the exchange server and it seems that it gets a CLIENT WAS NOT AUTHENTICATED error.
Anyone use SMTP with EXCHANGE 2010 yet???
In this case GDI no longer stands for Graphic Device Interface! I have an MDI form, and the child form loads up with a single panel positioned at a specific spot so that i can have a visual studio styled menu on the left side. The square white area is the panel with the fields in it for the user to enter. The left side is a TreeView with GDI lines drawn around it that dont appear until the menu has been changed. Here's what the menu looks like when its rendered properly:
When the form first loads, you can quickly see the GDI drawings come up (sometimes) then disappear. It flashes pretty quick when you can actually see it, but until you change the menu item to another causing it to redraw, its just... gone.. Looks like this:Here's the setup:I have two labels docked at the top for the large white text with a black background
There's the treeview on the left in a picturebox where the GDI components are drawn, and a panel touching it on the right side, which is sized and anchored on all sides basically keeping it stretched to the size of the window while keeping the top and left side pinned in position so it doesnt move, keep it touching the menu on the left.
Inside the panel is 10 more panels, one panel for each menu item. Each panel is programmatically set to resize to 1024x768 and becomes visible once the menu item for that panel is clicked. The panels are all programmatically top positioned at 0 and left positioned at -1 to hide the left border stroke from having the BorderStyle set to FixedSingle. Moving it to -1 hides only that border within the panel its in.
I have dual monitors, so i began stepping through the code on one monitor with the program running on the other so i could see what its doing with each step. While going through, at one point i see the contents of the TreeView completely vanish, but all the drawn GDI stuff is there. Once i get through everything and finally hit F8 on the very last line when control of the program is given back to me because its now waiting for me to do something, all of a sudden the treeview contents re-appear and the GDI drawings vanish.
I just upgraded a project from VB 2008 to VB 2010. Before, the project did not use LINQ. I have started implementing it. So, I have updated the target framework from 2.0 to 3.5, and added a reference to System.Core, and imported the namespace System.LINQ to the entire project and also imported System.Data.LINQ into the form I'm working with (because it was not available in the list for Imported Namespaces in the references tab).
It's not throwing any errors now, but my IntelliSense is not working for LINQ stuff.
For example... I write this:
[CODE]....................
Then, if I type S. on the next line, the IntelliSense doesn't grab what it should for S (Only get Equals, GetHashCode, GetType, ReferenceEquals, and ToString, instead of the options I should get like Count, First, FirstOrDefault, etc...). If I Type S.First. then its the same thing, no IntelliSense that lists the available fields for S, just the standard options (Equals, GetHashCode, GetType, ReferenceEquals, and ToString). I should be seeing my column names in my table when I type S.FirstOrDefault.
So any ideas what is going on? When I type the code, for example, MessageBox.Show(S.FirstOrDefault.FirstName), it works perfectly. But it doesn't change the casing of the text (so it would read s.firstordefault.firstname) and no intellisense while doing it. But no errors. BTW - Everything works perfectly when creating a NEW VS 2010 application, it's just my projects upgraded from Visual Basic 2008 that have this issue.
I recently got microsoft expression studio and VS 2010..To test out expression, i created a sweet looking UI, and transferred an old program from VS 2008, but the CSV writing function I have written in the '08 doesn't work with my WPF form in '10.
CODE
Private Sub ReadTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ReadTimer.Tick
CurrentPosition.Read()
CurrentPositionValue.Text = CurrentPosition.Values(0).ToString()
[code]....
specifically, the error is, "Computer is not a member of My" ....
I'm setting the Image & BackgroundImageLayout properties of a PictureBox programatically, but it's not working. I set the layout to Stretch to fill the picturebox, but the image just displays in it's original size. Here's the code I am using:
[Code]...
but i used this to check if its true
Dim returnValue As String = html
Label4.Text = html
If Label4.Text = "true" Then
[code].....
The code im using:
MsgBox(ListBox3.Items(i).ToString.ToLower)
MsgBox(clientdata.Split(":")(1).Split("|")(1).ToString.ToLower)
If ListBox3.Items(i).ToString.ToLower = clientdata.Split(":")(1).Split("|")(1).ToString.ToLower Then
else
[code].....
Now the weird part is that it goes to the Else case, while the 2 variables in the If are the same.
I found someone's code that they posted on YouTube for a file exists. Now, with their setup it worked fine, but I am trying to search the ENTIRE computer. Not just the application folder, and I can't seem to get it to work.
[Code]...
Using that code I can search for the specified folder and if the file exists it changes the text. Now this works, but I would like to search everything in My Computer at once.
[code]Well, the first GetPixel works fine, it sets textbox2 to yellow if the pixel is ofund and textbox1 says green. But, the second GetPixel doesn't work. The coordinate are correct and the color is also, but I never receive the msgbox.
View 28 Repliesmy program connect to Access DataBase 2003 ! in my computer every thing be ok !but in other pc my program can not open on show this message :
my OS is 7!my VS version is 2010 and it is my connection string : "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + My.Application.Info.DirectoryPath + "my_db.mdb" where is my problem ?
I have form1 and form2. On form 2 i have 2 combo boxes where the user is asked to make selections. once back on form1 i try to use those selections as part of an if statement but although i should be triggring them it does not. I cannot figure this out. I have set up test variables and msgboxes along the way to test this.
The code excecutes. I have double checked the variables on form 2. They just do not trigger a response that will enter the if statements even though it looks like they should. I have double checked that test1 and test 2 are grabbing the variables from form 2
test1 is "Male"
test2 is "10 - 19"
When the code excecutes i never get to the msgbox("Age") line of code. I have also tried taking the spaces out of the strings with no luck as well.
[Code]...
[code]why this code dosnt work? the if statment dont excute it work only if it's like this [code]
View 1 RepliesI've got a button in my app's window that I'm trying to click with code but it isn't working. I googled and found out to do this (in an MSDN document I think):
[Code]...
I wrote following code to copy a range from a workbook to another one:
xlSheet.Range(cell1, cell2).Copy()
xlThisSheet.Range("A1").Select()
xlThisSheet.Range("A1").PasteSpecial(Excel.XlPasteType.xlPasteValues, Excel.XlPasteSpecialOperation.xlPasteSpecialOperationNone)
xlThisSheet.Application.CutCopyMode = False
but in new sheet I find exactly same formatting reported in the first one.How can I do to report only values?
So I created a store procedure on my Sql Server 2008.
View 10 Replies
