Error When Loading Secondary Form A Second Time?
Jun 17, 2009
I have been working on a project of mine that will streamline some issues at the office. (Note: There is not much in way of documentation or comments as I just started on this)
This is what I have so far and I am getting this error:
"System.ObjectDisposedException was unhandled"
I can edit the database with the second form initally, but it pops up an error after I return to Form1 and then attempt to enter into the 2nd form any subsequent time after the first initial load.
Here is my code:
Option Strict On
Option Explicit On
Public Class Form1
[Code].....
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May 26, 2011
Private Sub Form_Load()
datReg.Recordset.MoveLast
End Sub
I want to show the last record after the form is opened but I got this error :
Run-time error '91': Object variable or with block variable not set
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Aug 17, 2010
Why my form loads takes time the first time I clicked the menu to load it (I even see not responding on the title bar), but when it is already loaded, I will close it and clicked the menu to load it again then it load fast already....
Here is what I have in my declaration section
Private cnn As New SqlConnection(My.Settings.MyConnectionString)
Dim cmdLocked As New SqlCommand
Dim daGrade As New SqlDataAdapter
Dim daLocked As New SqlDataAdapter
Dim builder As New SqlCommandBuilder
[Code] .....
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Jul 21, 2009
I have two forms for my application, that are visible in the Windows taskbar. When a modal dialog is popped up on the main form, the secondary form is locked. However, when the user clicks on the secondary form on the taskbar, it appears over the modal dialog box, and is basically frozen. Is there a way to ensure that the modal dialog box does not draw underneath the secondary form? The topmost property is no good, since this draws on top of everything, even stuff not related to the application.
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Sep 25, 2011
Im having 2 errors when loading the form the first one is: "The connection was not closed. The connection's current state is open" and the another one says "Conversion from string "" to type 'integer' is not valid" and everytime I change cmb_Suc appears: "The connection was not closed. The connection's current state is open" [Code]
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Apr 19, 2012
My startup form displays a login box and then, upon successful login, displays a series of buttons. One of the buttons displays a form named Calculator using the following
[code]...
When stepping through the code after clicking the button that calls the above code, it gets Calculator.Show and then jumps to code on the Calculator form that fires when a checkbox on he Calculator form changes checked state, apparently bypassing the Calculator_Load procedure altogether.This eventually results in the following error:{"An error occurred creating the form. See Exception.InnerException for details. The error is: Conversion from string "" to type 'Double' is not valid."}With the IDE claiming the error is occurring on the Calculator.Show() line on the previous form. Clicking the button a second time causes the form to load as expected, with everything working corectly.The load procedure header is:Private Sub Calculator_Load(sender As System.Object , e As System.EventArgs) Handles MyBase.Load Am I missing something in here that would cause that not to fire first upon a Form.Show call?Possibly relevant is the fact that I renamed the Calculator form prior to the problem arising, but I've searched for the old name and there are no vestiges of code still referring to it by that name. I also tried renaming the form back to the old name, but that didn't fix the problem either. (Plus I seem to recall having ran the application several times after the name change before the error was encountered, so I don't think this is relevant but didn't want to leave it out, just in case.)
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Mar 31, 2009
I have a windows forms application with several 'child' forms. (It's not MDI, and I don't want it to be).Normally everything runs fine, but on occasion windows gets into a state where all of the 'child' forms on the application are invisible when they should be on top of the main application. The oddest part is if I move another application's window over my application (i.e. explorer or notepad) the child form becomes visible within the boundaries of the other application. It's like windows is drawing my main form over top of the rest of the forms in my application without regard the z order, or topmost flag, or anything. If I cover the main form with a notepad window, etc. It draws my 'child' forms properly. Rebooting the computer and restarting the application temporarily solves the problem.
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May 21, 2012
We are testing some code to send email messages using Gmail from a form, but get a time out error.
Can you tell us what is missing from this code to get the email message sent?
Try
Dim SmtpServer As New SmtpClient()
Dim mail As New MailMessage()
SmtpServer.EnableSsl = True
SmtpServer.Credentials = New Net.NetworkCredential("ouremail@gmail.com", "MyPasswordGoesHere")
SmtpServer.Port = 465
[Code]...
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Feb 9, 2010
When I run my .net application exe .It takes time while loading first time How can I reduce a loading time of my application exe ?
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Feb 5, 2008
I was currently writting a Cyber Cafe for the client side which start up with a form that maximize and block all the client control like shortcut key and other security. It's fine to work in my pc and it take only about 5 second to startup the application and lock the client. But when i run the application in a pc that installed with games, it took about 40 second to run my apllication. I notice in task manager panel, the process need to read the whole application before it could load my first form. Is there any idea i can speed up my loading time? I have try to set the process priority to "real time" and startup using batch files, but it still need 30 second to load my first form.
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Feb 4, 2010
When I run my .net application exe .It takes time while loading How can i reduce a loading time of my application exe.
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Aug 26, 2011
Im Using VB 2008. I have MsgBox() statements in all Mouse & Form Click events to TEST & NOTHING FIRES during Form Load when I click on Form or Button Controls !!! The Form Load event contains code for Displaying the Label.Text control many times with changes in the Text to simmulate annimation.
[Code]...
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May 5, 2011
I'm learning to write text file from a Listbox and DataGridView, and read from it.Everything works fine until I have a small problem with reading file into DataGridView. The problem I concern is about time. For example, in my text file, I have Arrival Date & Arrival Time, but when I display it in table it is something like below:[code]
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Jun 23, 2009
I'm trying to force an always maximize setting
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Sep 6, 2009
I like to make an console application to measure the time it takes to fully load a web page, what's the best approach to do that? The purpose of this small app is to monitor some pages in a website, in a predetermined interval, in order to be able to know beforehand if something is going wrong with the webserver or the database server. It would be nice to be able to measure the time it takes to fully load the the page (images, css, javascript, etc). I have some code but I is not measuring the fully page.
Dim sw As New System.Diagnostics.Stopwatch
Dim req As System.Net.HttpWebRequest = CType(HttpWebRequest.Create("[URL]"), HttpWebRequest)
sw.Start()
Dim res As System.Net.HttpWebResponse = CType(req.GetResponse(), HttpWebResponse)
sw.Stop()
Dim timeToLoad As TimeSpan = sw.Elapsed
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Jan 16, 2010
I made two applications the first one calls the other. But the other application takes time to load. Even on a fast Pc. So i was thinking of adding a loading form to it. For example when the other application is done loading the loading form goes away.
[Code]...
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Aug 25, 2009
I have combo box being filled with more than 50 thousand records. it is getting sometime to load and bind the data. I am using datatable to bind the data. I tried using data-reader as well but in vain.
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Jan 1, 2010
at the time of recoredset movenext out of memory error occured in run time data have 3800000 lakh recored
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Aug 26, 2010
I've got an app working semi-background stuff in the GUI thread. Another thread won't work and a timer won't work. But I want the app to be responsive while I'm going my 'background' work.I cound use application.doevents - but that gives me 3 bad choices:
-loop with no sleeps - end peg an entire CPU (my task waits on stuff besides calcs & I/O so this matters)
-loop with a sleep - then the app slows down
-Try to make a 'smart sleep' loop that speeds up when lots of messages happen (check for messages in messagefilter function)
[code]why I can't use application.run, or threads, what I want to do is handled the OnUnhandledException event, then leave my app open for a while while some winforms stuff closes it down gracefully and tells my watchdog program to restart the app. after allowing the user to finish a critical process, too. Yes, I know people thing that a program getting OnUnhandledException deserves to die (obviously MS), there are 'dangerous' things that could happen; none of them are as dangerous, however, as the wrath of my users. Looking for vb.net sourcecode exact translations of the above two functions.
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Sep 8, 2010
I've developed an application in VS2008. Whenever I dragged the application from the primary monitor to the secondary monitor, the mouse cursor changes from the default one to resize when hover over windows title bar. How do I fixed it? I want it to remain as the default one.
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Jul 8, 2010
I have a dual monitor setup. I want my app to run in the secondary monitor by default (through settings in my app). I have been browsing the net for a solution and I found a solution which is setting the Form.Bounds to the Bounds of the secondary monitor. My problem is that if I set the bounds of my newly created form, when it gets displayed, it doesn't show in the secondary monitor.
private void button2_Click(object sender, EventArgs e){
Form1 frm = new Form1();
frm.SetBounds(-1280, 112, frm.Bounds.Width, frm.Bounds.Height);
MessageBox.Show(string.Format("frm.Bounds [{0},{1}]",frm.Bounds.Left,frm.Bounds.Top));
//frm.Bounds = Screen.AllScreens[1].Bounds;
//frm.Location = Screen.AllScreens[1].Bounds.Location;
frm.Show();
MessageBox.Show(string.Format("frm.Bounds [{0},{1}]", frm.Bounds.Left, frm.Bounds.Top));}
In the code above, I first set the bounds, I can see from the message box the settings I assigned. After form gets displayed, I checked the bounds again, it has changed to it's default. How do I show then a newly created form to a specific Bounds?
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Feb 18, 2011
I am currently working with a program where the user is prompted to click certain points on a picture within the picturebox on my form. The issue is that some of the points need to be pretty precise and i want to give them controls to slide the points once they have clicked them. The method for sliding is fairly simple but i want to be able to graphically show it in a secondary picturebox.
[Code]...
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Oct 1, 2009
I get an error "vb6 compiler gives an error Error in loading dll" and the compiler point to code line with "If Request.Form("EDAServerName") <> "" Then" and the word Request hilited. I searched many places with no help. Does any one know of resolution ??
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Apr 27, 2012
I am trying to write a VB .NET program that runs a Perl script and reads and uses the standard output. I'd like to be able to handle each line separately as it is printed, and update my program display accordingly. Here's some code I have "written" (read: "mostly copied off the internet"):
Private WithEvents pscript As Process
Private Sub myProgram_Load(sender As Object, e As System.EventArgs) Handles Me.Load
pscript = New Process()
[Code]....
This works with one problem: the program waits until the test script has run to completion, and then fires several OutputDataReceived events one after the other. This means that when I make it use the real script, it's likely to do nothing for as much as several hours, and then have to deal with, like, 5,000 events at once, despite the fact that stuff was being printed at fairly regular intervals throughout that time.
Is there any way I can make it deal with each line of text when it is written, instead of all of it at once at the end?
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Mar 25, 2009
used the WMI ChangeZoneType DNS command in C#VB.net before. I get an incorrect parameter exception when i try and invoke the changezonetype command. I get the dns zone that i want to change from the dns server (via query), set the zonetype to the appropriate uint value but am then getting the exception. I am trying to change the zone from secondary to primary and according to MSDN all the other values are optional (and as far as i am aware are needed when you want to change from primary to secondary) so i have not included them.
Below is the code that i am using....
For Each DNSZone As ManagementObject In mgrZones
mngrZones = DNSZone.GetMethodParameters("ChangeZoneType")
mngrZones("ZoneType") = System.Convert.ToUInt32(zoneType)
[code]....
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Apr 12, 2007
What I'm trying to do is to launch Powerpoint Wiever 2003 in my secondary screen.I can get a form to launch in the 2nd screen but any programs I launch from that form stary screen.[code]
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Feb 19, 2009
An application generates a runtime excpetion saying "Cound not load file or assembly 'CustomMarshalers, Version = 2.0.0.0, Culture = Neutral,PublicKeyToken=b03f5f11d50a3a' of or one of its dependacies. The system cannot dind the file specified.'This application is written in .net but is calling interop assemblies for SHDocvw and tool is running on XP.this application works fine on other users desktops. Earlier the same user was able to run the application on the same machine... it could be that security patches installed later is causing this.But are there any known resolutions for this error message
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Jul 3, 2009
I am having a problem, which I did not have until recenty, adding personal macro buttons to the Quick Access Toolbar using Excel's Customize function. The macros, which I know are, enabled and executable, cannot be assigned to new buttons on the QAT. Actually, I can add macro buttons to a new workbook fine, but when I close, reopen the workbook, and try to add another personal macro button, they all disappear.
I set 'Show Add-in User Interface Errors' in the Advanced tab of Excel Options and get this error when I open a workbook with personal macro buttons added to the QAT[code]...
I deleted the macros and manually keyed some simple command (msgbox 1) into a new macro and still got this error message.
I set 'Show Add-In User Interface Errors' on a remote server (where I do not have this problem) and I do not get this error message when loading workbooks with customized QAT.
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Mar 2, 2010
I'm trying to load data into a DGV row at a time from a dataset and keep getting the following error on the highlighted line.
Private Sub LoadClientGrid()
Try
grdClientList.Rows.Clear()
For Each row As DataRow In rsClientGrid.Tables("tblClients").Rows
Dim grdRow As New DataGridViewRow
[Code] .....
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Aug 24, 2010
I am using this line of code on form load event it is working very fine but i have to problems
1. It replaces the form name and display the date and time but i want to keep both date and time and forms caption separated by some space.
2. When form loads it load the current date and time but the time does not change it should run.
What should i do please please help me code is as follows
Me.Text = Date.Now.ToLongDateString & " - " & TimeOfDay
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