Forms :: Transferring A Textbox Value To An EventHandler Process?

Dec 9, 2011

I am using Visual Studio express 2008 to load a form, perform a task at a given interval. My problem is:

1) I am able to populate a textbox with the desired text (a pathname);

2) I can get the timer event to work perfectly;

3) The problem arises when the timer conditions are met and I need to perform a task based on the value of the text box.

4) The value from the textbox becomes lost and when i hold my mouse cursor over the textbox:

[Code]....

On a side note, the script runs perfectly when i hard code in the pathname, but this doesnt suit the work i would like this script to do.

View 8 Replies


ADVERTISEMENT

Transferring Variable From Textbox To Another Form's Textbox?

Nov 7, 2010

QuoteImports System.Data.OleDb
Public Class admin
Inherits System.Windows.Forms.Form
Dim mypath = Application.StartupPath & "\db1.accdb"
Dim connection As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=d:\db1.accdb;Persist Security Info=False;")

[Code]...

View 5 Replies

Transferring Data Across Forms - Global Variables?

May 27, 2009

I have 2 forms in this application. One form is just a simple SQL statement that is generated into a grid. It displays columns/rows. From there I want to be able to click on a row and have the first column of that row transferred to another form. In the second form I want it inputted into a text box. So, the user doesn't have to copy the record back out of the form then open the other form and paste.

The form opening and closing is not the problem. The problem is getting the data to transfer from one form to another!! I am not sure how to do it.. I have only been coding in VB for a few days and no formal training. I am aware of global variables and would be willing to assign the data to a variable and then have it transferred into the textbox of a the second form.

I do not know how global variables work in VB. This is what I got so far............
'The user clicked the transfer button.
Dim obj As System.Data.DataRowView = grid.Current
MsgBox(obj.Item(0), vbInformation, "Selected Data")
[Code] .....

View 2 Replies

Transferring Totals From Three Forms To A Final Form?

May 3, 2009

I'm taking my first (and only) beginning programing class for Visual Basics 2008. I'm working on my final project and have hit a snag. A little background info - I have been able to code everything except for two final steps (but they are my most difficult steps), on these final steps I've gotten two suggestions on other sites, one person helped me with the coding which I used for my form1, but it I still have several errors, and another person suggested that I use a module.

Here is the issue. I have totals on three forms that need to pass through to a final form, and once they are on the final form they need to show up in an itemized list and need to then be totaled again. I actually have a total of 5 forms including my first form aptly named form1, which incidentally is where someone told me I should set up my whole 'connecting the totals' form, and I believe the guy was on the right path with helping me but, I'm still obviously pretty lost on this last segment of coding. Since I had little difficulty with the majority of my project, I didn't think this last bit would be so difficult. I'm going to list my coding for each form below. My project is due Tue morning May 5th Eastern Standard Time, just in case someone starts reading this on or after that date. Just in case it helps explain the issue, I will also post my listing of error codes from my VB project, and they all are centered around my form1 (which is the form that I'm trying to set up the transfer through of the form totals). I also see that I can post attachments so in case it will help I'm going to post my project in the attachment too.

Error Codes:
Error1Event 'Load' cannot be found.
Error2Handles clause requires a WithEvents variable defined in the containing type or one of its base types.

[Code].....

View 1 Replies

VS 2005 Transferring From Datagrid To Textbox?

Aug 30, 2009

Is it possible to select a row in a datagrid and display the contents of one of the columns in a text box ??

View 5 Replies

Forms :: Thread And Updating Forms - Set Options And Start The Encode By Spawning A New FFMpeg Process

Sep 21, 2010

I'm working on a website where we'll be getting a lot of videos to be uploaded. To keep things simple and secure, I'm just writing VB.net windows app to suck all the files in a directory in, allow you to set some options, and start the encode by spawning a new FFMpeg process.

[Code]...

View 5 Replies

Asp.net - Add Eventhandler Dynamically?

Jun 15, 2011

I'm dynamically adding an event handler on a link button, first when the page is load o create a link button with product category. On clicking the product category it fires an event and passes the product-id IN sender object.

Here is my problem: when i readd the event handler on page load it's giving an error cannot cast sender object

[Code]...

View 1 Replies

Benefits Of Using EventHandler?

Dec 7, 2011

I'm having trouble wrapping my head around Events and their Handlers in general. I was working from some sample code that used them, and I can't understand why use an event rather than simply using a sub. I'm absolutely sure I'm missing the bigger picture here.

[Code]....

The Event allows a class to say 'Do something when this happens' in a very ambiguous way, leaving the class which created the Object to define a Handler; what that action should be. That Handler can, and very likely will, be unique to each instance of the class.

It seems to me that this would likely be achievable (on a basic level) through indexing and enumeration, but that would get messy and become a lot of code to write rather quickly. This is probably a much more flexible and extensible way of handling things. I'm going to post this anyway, in the hopes that I'll get someone to tell me whether I am correct in my observations or totally off base, and that it helps someone else who is having trouble with this concept as they dip their toes into OOP and event driven objects.

View 2 Replies

Calling Sub From EventHandler?

Jun 7, 2010

I'm using the below to update controls from another thread (works great) How would I call a Sub (Named UpdateList)? The UpdateList updates a listview with a list of databases on a selected SQL instance, requires no arguments.

Private Sub CompleteEventHandler(ByVal sender As Object, ByVal e As Microsoft.SqlServer.Management.Common.ServerMessageEventArgs)
SetControlPropertyValue(Label8, "text", e.ToString)

[Code]....

View 1 Replies

Conversion From C++ (Eventhandler)

Mar 4, 2009

I have found a sample code of something I am trying to complete in VB.Net however the sample is in C++, and I am having a hard time understanding how to translate it.

I have everything basically covered except for the actual EventHandler line.

[Code]....

I would like to know how to translate this easily into VB.Net. I understand i may have to create an Event and a Raise Event, but not sure how.

View 2 Replies

Dynamically Add EventHandler?

Aug 7, 2009

Back in form1, how can I wire up the Click event for each MenuItem present in the contextmenu? I want to do this as abstract as possible, meaning I don't want to implement the OnClick code inside Form1.

Code:
Public Class Form1
Me.ContextMenu = MenuFactory.BuildMeAContextMenu()
End Class

[code].....

View 13 Replies

EventHandler Setting Value Of -1?

Jul 1, 2009

Me.SetProgressBars()
AddHandler zip.SaveProgress, New EventHandler(Of SaveProgressEventArgs)(AddressOf Me.zip_SaveProgress)
zip.Save(target)

Took some snippets from a MSDN page and molded it into my project ... problem is on every run its setting a value of -1 to something and i cant for the life of me figure out what to!

Private Sub zip_SaveProgress(ByVal sender As Object, ByVal e As SaveProgressEventArgs)
Select Case e.EventType
Case ZipProgressEventType.Saving_AfterWriteEntry

[code].....

View 2 Replies

Forms :: How To Find A 32 Bit Process In A 64 Bit Pc

Aug 25, 2010

[code].....

View 1 Replies

Forms :: Recognize The Process End

Jan 20, 2009

I create a simple form to call an process, is there anyway that the form can recognize that I have just ended that process

View 4 Replies

C# - Implements EventHandler From 2 Classes?

Mar 15, 2011

I have 2 classes that Implement 1 EventHandler. Its part of a fingerprint scanner API but I'm having some issue and I'm not sure if it is my fault in how i use the Implements.Is it ok to have 2 different classes Implement the same EventHandler? Each class then uses the events differently within the class but it almost seems like there is some overlap that is causing some issues. I know this is hard to explain without posting code but since i can pinpoint the problem, idk what to post. My main point is, can you have 2 different classes Implement the same Interface?

View 1 Replies

EventHandler AddressOf Invoke?

Apr 22, 2011

I wish to check the hard drive space used in a folder on a hard drive. This will happen continuously as a service, so it will be calculating the space used for thousands of folders all the time. I know that this code can be done easily in dotnet, but it seems to take a really long time. Are there any APIs to do this more efficiently, or does the entire looping process have to occur to do this check?

View 3 Replies

Events - EventHandler Managment In .NET?

Aug 19, 2009

I am right now in an project using VB.NET and needs to translate this C# code into VB.NET

oldCommand.CanExecuteChanged -= commandReference.CanExecuteChanged;
newCommand.CanExecuteChanged += commandReference.CanExecuteChanged;

For me it seems like the an event hooking up on an another event?But I have tried everything to translate this into VB.NET code?I have found out that EventHandler management in VB.NET is far from as good it is in C# as many other things.

[Code]...

View 3 Replies

VS 2008 : How To Cancel The Eventhandler

Jan 8, 2010

How can i cancel the eventhandler, i have a problem with tab browser is that:- i have a set of button image to show the forward and back button which are disable or enable (like IE).Inside my program which are deal with the web_CanGoForwardChanged and web_CanGoBackChanged event.my problem is that if i click on other tab faster than the eventhandler done,i got the wrong image shown on button.how can i stop the eventhandler to prevent the wrong image.

Public Function GetBrowser() As WebBrowser
If TabControl1.SelectedTab IsNot Nothing Then
For Each c As Control In TabControl1.SelectedTab.Controls
If TypeOf (c) Is WebBrowser Then

[code]....

View 1 Replies

Forms :: How To Capture Process Messages

Feb 14, 2011

I've got a winform that has a button that runs an exe from the command prompt (process). Since the cmd window pops up and goes away so fast, I need to kno if there's a way to capture the messages that were sent in the cmd window, within my Windows form. (like make it write to a log file)

View 1 Replies

Forms :: Start Or Activate Other Process

Mar 5, 2011

I am having a bit similar task, which I am not able to get thru. I'll explain..I have two apps A and B, B is kind of a reminder application which runs in the background..but that is not important here, thing is when App B is open, it has a button which takes user to App A, I am doing that using Process.Start("A.exe") all good so far. Problem is I need to make sure that if any other instance of App A is running then I need to jump to that instance. I am able to check for the instance running using Process.GetProcesses() but I am not able to set focus to that running instance.

View 1 Replies

Forms :: Starting Process From Usb Numpad?

Mar 29, 2010

I have a user interface with pushbuttons, each starting a different process. Can I manage these pushbuttons via usb numpad? i.e. if 1 is pressed at numpad, pushbutton 1 will be clicked (so process 1 will start); if 2 is pressed at numpad pushbutton is 2 will be clicked and so on.

View 1 Replies

Forms :: String Repeat Process

Jun 27, 2009

Here is my string: (not real just made up) Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load WebBrowser1.Hide() End Sub Now if I want to repeat that string the ammount of times I say in TextBox1, how do I code that with that string code above?

View 4 Replies

.net - Multiple DispatcherTimers With One Tick Eventhandler

Jan 5, 2012

I'm working on a project that will require me to react to 5 separate events generated by an external device and then do something after a certain delay. The events will normally happen one at a time but may occasionally be simultaneous.

Imports System.Windows.Threading
Class MainWindow
Private TimerList As List(Of DispatcherTimer)

[Code].....

View 1 Replies

Clone ValueChanged EventHandler Of A DateTimePicker

Apr 24, 2012

I am trying to clone some of my Controls, with their EventHandlers. I have a function to retrieve the Delegate of a specific EventHandler.The hard part is to find the correct naming to use.

This is the function I'm using
Private Function GetEventDelegate(ByVal ctrl As Control, ByVal eventname As String) As [Delegate]

[Code]......

View 1 Replies

Clone ValueChanged EventHandler Of A DateTimePicker?

Aug 4, 2011

I am trying to clone some of my Controls, with their EventHandlers. I have a function to retrieve the Delegate of a specific EventHandler.The hard part is to find the correct naming to use.

This is the function I'm using
Private Function GetEventDelegate(ByVal ctrl As Control, ByVal eventname As String) As [Delegate]

[code]......

View 21 Replies

Multiple DispatcherTimers With One Tick Eventhandler?

Oct 29, 2011

I'm working on a project that will require me to react to 5 separate events generated by an external device and then do something after a certain delay. The events will normally happen one at a time but may occasionally be simultaneous. Is this a bad idea and if so why?

Imports System.Windows.Threading
Class MainWindow
Private TimerList As List(Of DispatcherTimer)

[code]......

View 2 Replies

Some Code Not Executing From Inside EventHandler?

Feb 19, 2008

I'm having a really weird problem with my current project in Visual Basic 2005.To make a long story short, I have an EventHandler subroutine (Clock1_tick) which triggers on the Elapsed event of a Timer (Clock1). Some, but not all, of the code within the subroutine executes correctly. Some of it doesn't execute at all, even though the debugger shows that each line of code is being read.

The overall details of the program aren't really important, but within the program I have a VB class file which can be instanced via the "New" keyword and contains a series of functions, subroutines, and properties... a typical class file. The class file is for managing sound channels..The frmMain includes a status bar with a label to display the program's current status. It also includes a public sub which recieves a string and sets the text of the status bar:

View 16 Replies

Tell When I Lose My EventHandler For Application.ThreadException?

Apr 26, 2012

I have an Unhandled Exception handler that does something like this[code]...

So it looks like from the "add" that the last person that subscribes to Application.ThreadException is the one who gets it (it's not additive as most event handlers are). I don't want to give up my subscription to this eventhandler no matter what. Can anyone think of a way that I could track when I lose my subscription to the Application.ThreadException so I can steal it back from whoever stole it from me?

View 2 Replies

[2008] EventHandler For Multiple ComboBox?

Jan 23, 2009

I'm creating multiple ComboBox and multiple TextBox at runtime and would like for the TextBox BackColor to change when an item in the associated ComboBox is selected. I was able to do this before with a single TextBox and single ComboBox I added during design, but I really don't understand how to tackle this.

[Code]...

View 6 Replies

Forms :: Convert String To Give Textbox Name To Get Contents Of Textbox

Jul 6, 2011

I have a form where a number of textboxes are programmatically created within a flowLayoutPanel and named by adding together 2 strings.

With the click of another button i hope to have all the values entered into these text boxes stored in a text file. However, i cant seem to find a way to add strings together to allow me to retrieve the values entered within the text boxes created.

Below is the code i have so far: BTW FLP is my flow layout panel and c is my calculated nmber of textboxes that are created.

Private Sub createTB(ByVal c As Integer)
Dim x1 As Integer = 1
Dim y As Integer = 2

[Code]....

View 3 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved