Passing Value From One Winform To Another Winform?
Jul 7, 2010
A Form is to Accept User Name and Password from user, after verification the form should display another form that will accept user's full data. When a user press the Ok button, the information entered on this form should be display in another form (Showing the user what he/she has entered)
i have Design the Firs Form and the second form, how can i pass the information entered on the second form to third, and also what will the code look like I need help on this or Code Sample?
NB: i am trying create an instance of the second form in the third form and declare a variable in the third form that will holed the value, but still not working I want to learn .NET Programming in VC#, ASP.NET And VB.NET. I am student and really get excited when it comes to programming
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Mar 25, 2010
i have a windows form that has a web browser control.
i need to pass the value from the windows form to the html doc.
here is my problem.... can pass the value across to to a function in the html page but when i try to pass the same value to an image tag in the same document it does not read the value.
here is my code from the winform
If e.Url.Equals(wb1.Url) Then
wb1.Document.InvokeScript("fetchImage", New Object() {path})
End If
it passes through the variable 'path' to a function in the html doc.
heres the code for the html doc.... this part of the code works
function fetchImage(path) {
var now = new Date();
var zm_image = new Image();
[Code]....
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Feb 4, 2010
is it possible to use the same database for winform application (with vb.net) and web based with asp.net?
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Feb 1, 2011
I have a winforms app with multiple GUI threads. I want them to be able to access each other's thread objects without having to keep track of that information separately.Is there a function in .NET that I can feed a winforms control or window object, and get back the thread? Or a function in the API I can pinvoke for the threadID?
Edit For those of you who for some reason believed my italicized text, congratualations, you're hired!! Here is the problem: "App is crashing in the wild by locking up totally, that is, it stop responding. Very intermittent, and trying to debug it, it seems to never happen."
So what do do? Install an option in the program that the user can activate under our direction, whereby from another GUI thread in the same app, do a thread.abort on the main GUI thread, then we can look at the call stack in the error log. Viola, found an impossible to debug error in less than a day. (Stop now, it had nothing to do with abusing multithreading:-)
I'll admit I almost didn't ask this, the reason I did was I could see an object reference to the main form, but there wasn't any for its thread. I'm giving Chris Shain the answer a/c it is a quick way, unfortunately when the thread is hanging, I wouldn't be able to do an invoke (it would hang too). A little more digging revealed the GetWindowThreadProcessId API call. But it's an unmanaged thread ID, apparently there are complications turning that into a managed thread ID.
So I bit the bullet and put in a global reference to the main UI thread. Would have posted it to begin with, but hadn't written it yet.In main public module/static class:
Public GUIThread As Threading.Thread
Sub Main()
[code]....
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Aug 24, 2009
I am trying to put a pdf file on my form using microsoft report viewer, but i cannot find it. where is it?
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Sep 4, 2011
ok so i dynamically create a wsf for running an automated telnet session that works great!!(finally!!) but auto executing the script from my code is proving difficult for whatever reason.
I have tried:
Shell("C:shutoffscript.wsf") this produces this result.
also tried setting a bat file that launches the script and launching it as well using shell every time I launch it I get an error in the script that works just fine executed outside my code.
using outfile As New StreamWriter("c:" & "shutoffscript.wsf")
outfile.Write(sb.ToString())
End Using
MsgBox("Script built press ok to execute")
Shell("C:shutoffscript.wsf")
I think this has to be some sort of permissions error right? Since both errors tend to not be able to find the file. Just not sure how to fix it.
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Jan 20, 2012
Public Class ConsoleHelper
<Runtime.InteropServices.DllImport("kernel32.dll")> _
Public Shared Function AllocConsole() As Boolean
End Function
[Code]....
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Sep 22, 2011
COM Reference 'AcroPDFLib' is the interop assembly for ActiveX control 'AxAcroPDFLib' but was marked to be linked by the compiler with the /link flag. This COM reference will be treated as a reference and will not be linked.Winform - Get It To Run On other Computer?
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Dec 1, 2010
Done quite a bit of looking but not finding what i need. From a win form i'd like to open up a web browser passing in a url. But i need to provide authentication while doing this. I tried just using a system.diagnostics.process.start("http://userid:pw@site") but that does not work. Was hoping someone could lend a hand.
[Code]...
so is there anything else that can be done to get IE to work.. cause i'm thinking that would allow the above code to work as well.
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Dec 9, 2010
There is alot of "search-hits" for the BASS.net Lib, but there seems to be non documentation for how to do this on the [URL] page. My problem is: I want to be able to play a .XM file in my Winform. I'm using VS 2008, .NET 2.0 on a 64-bit computer. Does anyone have any experience with this?
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Oct 25, 2011
How to set winform start position at top right? I mean when user click (start) my winform application the winform will appear at the top right of the screen?
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Jan 11, 2011
VB.Net / Winform.Is there a component that will look like a Button but when pressed will open like DropDown, but the DropDown wil contains a list of Buttons? Menu bar won't work for me in this case.
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Dec 7, 2010
I am using vb.net / Winform 2010.I am looking for a free (or very cheap) alternative to the DataGridView, one that looks more like what I see on ads for XTraGrid. Something that will multiple lines per records, and for lines to be rolled up, and expanded by clicking, etc.
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Apr 19, 2011
I've been profiling a WinForm's application using ".NET Memory Profiler".I can't quite seem to understand how my application is growing to 1GB, then 2GB, then 3GB of usage - according to windows task manager.
The private bytes using that tool, and "Total Bytes in All Heaps" shows only as 70MB or so. At the top of my list of instances hanging around, they are mostly String, or WeakReferences to lots of little objects.
All the application is doing is showing a form that loads data from a database. I repeat the show/dispose cycle of the form about 100 times and the growth is continuous.I've tried about 3 memory profiling tools now and none of them are showing me where this enormous amount of memory consumption is coming from.
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Aug 6, 2009
I'd like to place a button on a WinForm that will allow the user to access an external website via IE.
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Aug 5, 2009
I am in the process of converting an in-house web app to a winform app for disconnected reasons and I hit the following snag.
[Code]...
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Mar 17, 2012
How do I convert the following VB WinForm to C# WPF?
txtFoo.Text = Strings.Right(txtFoo.Text, 10000)
I cannot find Strings in WPF control class and String in WPF does not have method of String.Right
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May 10, 2012
I'm working on WinForms project. I need to change color of my form from white to black.
VB Code:
Dim g As Graphics, Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
g= Me.CreateGraphics
End Sub
how can I do this with help of g instance's methods?
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Sep 25, 2009
The application is written using VB in VS 2008 with .NET 3.5 I have a table in SQL Server that represents Invoices and in the table is a field named "Paid" which is define as CHAR 1 with values of "Y" or "N". Nulls are not allowed.I have two Bound Windows forms to manage the Invoice data, one with a DataGridView and the other a Detail Form. Both use the CheckBox control for the Paid field.
In the DataGridView I can define values for the TrueValue and FalseValue and the Database is updated correctly.I can not find anything like this for the CheckBox control on the detail form.Am I missing something? It seems like if it is one it would be in the other for the same control.handle a CheckBox on a Detail form? CheckedChanged?, NewClass for the CheckBox (which I have not done before)? Other?
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Dec 2, 2009
I want to display a link in a message box. By default the text is displayed as a non-selectable string.
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Jun 11, 2011
im using membership of asp.net to manage user and roles in my vb.net winform application when logged in i wanna get the current user in a specific form
i use that code
nom = TextBox1.Text
Dim user As MembershipUser = Membership.GetUser(nom)
Dim identity As New GenericIdentity(user.UserName)
[Code].....
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Nov 20, 2009
I want to embed my noteped.exe to my winform. It must work within my winform and within a panel.How Can I Do this?
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Aug 17, 2011
I have a winform and its fullpath is C: est.exe
How do I get the winform fullpath at run time? For example, the user may move the winform to other places.
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Nov 11, 2009
I don't find a CanGrow property on the Textbox control. This is common in some other controls, and what it does is expand the control to acomodate more data. Anyway to get this feature in the TextBox?
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Jul 27, 2011
I want a modal screen on startup of the computer, so that user forces to make some action on that screen. Also I want to disabled close button of the screen, It should cover entire Desktop.How to achieve using winform/webform? is parent/child form is the only solution fro this/?
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Aug 8, 2007
I want to launch any URL using desktop application developed using VB.NET using POST method.
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Dec 19, 2009
I have a windows application ( vs2008+sqlserver+vb) with some forms and 2 reports. I deployed this system on machine and made some data entries. Now I want to change both reports with new one and it might possible that I need to change those reports frequently...may be twice in a day due to some reason. So now I just wanna know that is it possible to make a setup with extra directory in which I can just copy n paste my new reports to replace old...I don't want to play with my setup...I just want to replace some files to replace reports...
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Sep 12, 2011
I am writing an application that on first time run checks if a user is in a database. If the user exists it closes itself.I was wondering if I could pre load in vb .net a current or up to date query from the database. That way I dont have to open that initial connection to the DB.
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Feb 11, 2012
I have a winform and i have about 30 labels and 30 picture boxes on it. What i would like to do is fill each label and picturebox with a value and image from a backend database. I could have easily done this in vb6 using control struture , for eg.
for x = 1 to 30
picturebox(x).image = value from database
label(x).caption = value from database
next x
Is there something similar i can do in vb.net. I search a lot but found only complex programs difficult to understand and too much of OOP.
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Apr 15, 2011
In a small vb.net application is use the shortcut's F1 and F3 to start/stop a timer countdown.In fact not the Keys itself are pressed, but i have to buzzers connected via USB who are simulating F1 + F3 when pressed.Precise the application runs on a karting track. When a driver enters the pit he/she will press the USB-Buzzer to start the countdown, pressing the 2nd buzzer when leaving the pit.Everything is going well, with one exception.After a longer period without activity the application will not react on first hit on the USB-Buzzer so they have to double press it to start the timer.
i already activate the winform with a timer in background (also center it on screen/center the mouse/making them topmost) but it seems the application falls into sleep and the first hit on the buzzer is the wakeup call for the form an the 2nd is forstarting the countdown.How to make sure that the application will start the timer on first hit.
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