Calculator Program - Blank Field Shows Error
Mar 8, 2011
I'm doing a simple calculator program calculating Pennies, Nickels, Dimes and Quarters. I made a Try-Catch statement so that if the user enters letters into the text boxes, they get an error message. However, if the user leaves one field blank, the error message still pops up. What's the code so that I can get Visual Basic to recognize that an empty field is the same as 0 so that that message doesn't pop up? [Code]. What do I need to add to it to get that Error Message to stop showing when the user doesn't enter a value into one of the text boxes?
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May 30, 2010
I have a field called PODate & TextBox txtPODate.text. It saves/updates fine when the txtPODate is filled. But when the txtPODate is blank, it throws an error. The problem is that I can't enter date for each record unless I got Purchase requisition converted into Purchase Order. Once it is converted to PO, I need to enter the date to update that filed. So, how can I make my program to accept blank date field.
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Jun 2, 2011
I got a serious problem. Though I have made my program newly it shows error. I have used 1280,1024 animation only for first form then used 1280,1024 image for every form. Today I was checking then it was showing me error message for 19th & 20th form. If I use On Error Resume Next then it shows error for another form ; if I use same code there in the menu item I mean so that I can get rid of error when I click to show a form it shows another error. First error message is "InvalidOperationException was unhandeled An error occurred creating the form. See Exception.InnerException for details. The error is parameter is not valid." and second error is "OutofMemoryException was unhandled Exception of type 'System.OutOfMemoryException' was thrown". I have noticed it that it doesnt show error message for those form which have few labels and text boxes. It shows error message for those forms which have 1 menu bar, 2 picture boxes(one is 1280,1024 & another is 250,456), 2 group boxes, 40 labels, 3 combo boxes, 38 text boxes & three buttons. Please help me I need to get rid of this problem. Does it mean that I cant use unlimited control there in my form?
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Sep 30, 2010
I am really confused! My program doesn't work if I don't have Visual Studio here in my PC. To test it I have uninstalled Visual Studio. But my program doesn't work though Flash Player is present there (I have used Flash animation in the first form).
To be more sure about it I have installed Flash. But it's not working! That means the Flash animation file (.swf) is not making a problem! It needs support from Visual Studio to start. Doesn't it mean that some files are not attached with a setup file as a result it needs Visual Studio to run? Let me tell you how I create a setup file of my program.
CODE:
When I click on the icon of my program it shows the error message
CODE:
Reporting details: This error report includes information regarding the condition of WindowsApplication1. When the problem occurred the operating system version and computer hardware is use; your Digital Product ID, which could be used to identify your license; and the Internet Protocol(IP) anddress of your computer.
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Jun 10, 2011
I have created setup file of my program & it shows error when I install it there in another pc which doesnt have visual studio. Even I have tried to install it there in another pc which has visual studio & it worked well. I am confused. It shows following error message: WindowsApplication1 WindowsApplication1 has encountered a problem and needs to close. We are sorry for the inconvenience. If you were in the middle of something, the information you were working on might be lost.It has what data does this error report contain link. From this link I have collected following information.[code]
We do not intentionally collect your files, name, address, e-mail address or any other form of personally identifiable information. However the error report could contain customer-specific information such as data from open files. While the information could potentially be used to determine your identity, if present, it will not be used.The data that we collect will only be used to fix the problem. If more information is available, we will tell you when you report the problem. This error will be sent using a secure connection to a database with limited access and will not be used for marketing purposes.
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Mar 5, 2010
i have developed a small application and was working fine on developing machine but when i installed it on another computer and double click on it to start it starts and after splash screen it gives don't send error [an error occurred] and getting closed.
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Jun 11, 2011
[Code] I have used flash .swf file there in my program(It shows animation there in form1).If I dont have flash player here in my pc & if I install & run my program then it shows error message that "Windows Application1 got a problem needs to close". If I have visual studio then it works when I install flash player. But if I dont have visual studio here in my pc & install flash player it shows same error that "WindowsApplication1 got a problem needs to close".
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Jul 3, 2010
Simply saying I've added an Notify Icon to my project and then added context menu showing up when the left mouse button is pressed. The problem is that with the context menu some blank form is showing in the taskbar. There is no such form within the project.Does anyone know why it may be happening or how to get rid of the effect? I might add that I have other context menu attached for mouse right click button and it works fine, no blank forms and such showing on the taskbar it's just the left mouse button that works that way.Here is the code that I am using to show the menu:(the visible state to false is necessary for the other menus not to pop up with the one i want... unless anyone knows better method)
Private Sub NotifyIcon_Click(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon.Click
If e.Button = MouseButtons.Right Then
[code].....
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Aug 7, 2009
I have a combo box defined as a drop down list for a numeric field and have possible values under items. One of the values I have is a blank value (at the top of the items list) in case the user needs to leave the value as null. However, when I choose the 'blank' value, it will not let me past that field. I tried changing the 'data source update mode' to 'Never' and it let me past the field but then of course it won't save ANY of the values I choose.Is there any easy way around this without having to change the field to a string? I have several like this.
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Aug 13, 2011
I want to add a blank value to a field in access database with vb 2008 command.
Problem 1: Here is my code, it shows conversion to string not possible errors
Private Sub btnRedThrow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRedThrow.Click
Dim dbCnct As New DBUtills
[Code]....
notice the fifth and last value is empty. But it is not being added into the database, how do I do that?
Problem 2: Why does an additional field from my access database disappear even after I manually created the field?? (access database 2003 version, extension is .mdb) I'm using visual studio 2008
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Oct 27, 2009
Dont know what happened but on every form whichever control is related with an image in the resource is not displaying image. I mean the background image field in every control is blank...
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Dec 31, 2009
I'm using the ErrorProvider in VB.Net (2005) which is associated with a BindingSource that is bound to a custom object that I have created. This custom object contains a date field that has a "Date" data type that. I am using a "TextBox" to bind the date field in my form. My issue is, whenever the TextBox loses focus and is blank, "String not recognized as a valid DateTime" is displayed by the ErrorProvider and the focus can't be changed to any other control on the Form. It's good that the ErrorProvider validates entries on Date fields by default (I didn't set up my custom object to display this particular error for the date), but it should allow blank values. I want the user to be able to have a blank date with no error message displayed. How can this be done using a Date field bound to a TextBox?
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Sep 12, 2009
I have a date field bound to a textbox. If I make any changes to the textbox, I get "stuck" in the field unless I put a valid date value. All I want to do is set the date textbox to blank and move on to the next field, but I can't. I am eternally "stuck" in the field unless I put a valid date value.
[url]..
I did several hours of research, but looks like there is really no solution to this problem... Is this true?
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Jun 20, 2008
Using VB2008, Access
I have 2 fields defined as date/time (short date).
I need to store dates fields which may at times be blank (null), how do I go about that?
I tried using:date.minvalue and that stores the value of 12/30/1899. I would like the field to be blank until the user enters a valid date.
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May 4, 2009
How can I get this to happen? I googled around and it seems setting the CUSTOM FORMAT to " " when the field is null will work but not for a BOUND datetimepicker.
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Sep 21, 2011
I have to create a program where the user enters 2 numbers and the program outputs all the even and odd numbers between those 2 numbers.I have that part of the code complete. But now I have to enter code where if the user enters a letter instead a number in either input box, that a message pops up and tells them to enter a number, instead of a letter... I keep going round and round on this and can't seem to get it quiet right.Here's my
'Author: Ambre A. Coleman
'Purpose: To show all odd and even numbers betweeen two entered numbers
'Date: 09/14/2011[code].....
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Oct 11, 2010
How can you add a image where when you double click on the icon and the program starts it shows a picture before the program loads. Like Photoshop startup or the new 2010 visual Basic express start up
[Code]...
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Apr 13, 2012
I have created a com dll in Visual Studio 2010, vb.net. The dll is supposed to compile in the framework 3.5 for X86 processor. Should run anywhere right? I reference this from an Access application using vba. All works well on my development machine. I must also say that the project references an eBay sdk dll called ebay.service.dll. This file supports converting the .net commands into the appropriate soap commands to communicate with eBay.
All this works well on the development machine when compiled. The files in the bin/debug folder are eBayListing.dll, eBayListing.tlb, and eBay.Service.dll. I can reference eBayListing.dll from Access and everything works well on the development machine. On the laptop I registered the eBayListing.dll and eBayService.dll using the visual studio regasm at: C:WindowsMicrosoft.NETFrameworkv2.0.50727RegAsm.exe. Both files appear to register as I get the registered message from regasm. I run this as administrator.
When I try to set the reference from the Access application in the VBA references I can only see the reference to the file as it was on my development machine. I can tell because it has the path the the bindebug file. I don't see the version of the dll supposedly registered on the laptop. The file obviously isn't there so I browse to the file on the laptop that is theoretically registered, but get an error.
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Jun 3, 2011
I have created setup file of my program. I have tried to install it there in two pcs to test it that its working properly or not. One pc has visual studio & my program worked there after being installed but another pc doesnt have visual studio & my program doesnt work there after being installed. It shows error message that "WindowsApplication1 WindowsAoolication has encountered a problem and needs to close. We are sorry for the in-converience." What does it mean? Does it mean it that I couldnt create setup file properly?
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Apr 4, 2008
when I want to install the VB.net from that CD, I can't. it said I should to install framework from the internet. I have install the framework, but when I want to install the VB.net, it still said that i should install the framework. actually,i want to install this VB.net because i want to learn about this compiler more.
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Dec 2, 2011
I am working on a mortgage payment calculator that has three user input textboxes (amount, interest, term). The interest input is a MaskedTextBox masked to (00.0). The issue I have is that if the MaskedTextBox is has no user input when the calculate button is selected then I get the error "FormatException was not handled" "Input string was not in the correct format", I highlighted the section in the code below. I'm quite positive the error stems from the MasketTextBox mask of 00.0, the decimal I believe causes the issue when no other data is entered.
[Code]...
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Jan 11, 2012
i'm just a begginer in using visual basic. i'm trying to add, subtract, multiply and divide two numbers. here is my code;[code]an error is occuring when i'm not putting any number on the textbox. now for the problem when i put a number to textbox1, and 0 to textbox2, there is also an error. It's because we can't divide a number to zero.
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Jun 28, 2011
I am trying to convert a VB6 app to vb.net. It used msInet.ocx and I am using FtpWebRequest to replace it.I have a problem when the password is blank and then remote server throws a 500 error.WebException was handled The remote server returned an error: (500) Syntax error, command unrecognized.
Const localFile As String = "C: eststat.txt"
Const remoteFile As String = "/stat"
Const host As String = "ftp://myprinter"
[code]....
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Nov 8, 2011
I'm taking an introductory programming course, and am completely flummoxed as to what I'm doing wrong with my program. The problem seems to be in my arithmetic, as the program runs fine; it just doesn't produce the correct result when compared to the professor's control model.
I need to create a mortgage calculator, using the following formula: monthly payment = interest rate * loan amount * ( (1+ interest rate) ^ months) / ((1+interest rate)^months)-1) )
We have to use that formula, no other one. If anyone can spot an error in my code, please let me know what I've done wrong!
The code I've written is as follows:
CODE:
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Apr 13, 2010
when i leave the tab and move to another tab and return to last tab
this message show to me
http:[url].....
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Aug 25, 2009
I'm trying to make a notepad, but I can not get it to open files on start up.what i mean, example, I right click on a text file on my desktop and select open with and then my program(it opens the program with a blank textbox, it does not open the text file)I do not know the code for makin this come true
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Apr 21, 2010
I need a code (or a mini tutorial) for like a basically antivirus, but not everything, I only have these requirements:-to run on startup-when it runs, a image (with the AV logo) pops up, and after a while (like 2-3 seconds) it dissapears-when it runs on startup, the main screen of it dont' pop up, but will be shown on system tray
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Feb 26, 2010
GPA 1.0, 1.1, 1.2 through 4.0 alredy entered in a listbox in propertiesradFemale, radMale, btnCalc btnExit: lblMale, lblFemale, lblAll to store averages. There are no text boxes.Please look at my code and tell me what I'm missing.... I'm sure it has something to do with the listbox...
Option Explicit On
Option Strict On
Option Infer Off
[code]....
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Apr 15, 2009
I posted this in the wrong part of the forums. Using visual basic 2008 and keep geting this message whenever I try and test this calculator program I've been mucking around with for the past 2 hours.
[Code]....
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Nov 16, 2010
I just switched to VS 2010 for Windows phone 7 developement... I am trying to create a basic BMI calculator app...This is what I have now...
CODE:
However I have these errors which are as below
Quote:
CODE:
Quote:
CODE:
Did I forget to declare something? This does not happens when I am using the divide and multiply in VS 2008.
Error Screenshot as attached below...
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