I have a small program that contains a webbrowser object, 2 labels, and 3 listboxes. For some reason, whenever I try to hit Debug, it gives me the following error:
System.InvalidOperationException was unhandled
Message=An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.
Source=Test3
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Im trying to send a url into a browser by a button on another form,
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but when i send it it removes the ?, & out of the text, how would i make the string keep the & and ?
[code]the program keeps trying to create the folders in the runtime directory not in my documents under ipceloyn any ideas why this is not working?
View 5 RepliesI cretaed a vb application where I concatenate a string to build XML code and Im getting an error stating that I must include a matching PURCHASE-ORDER-SHIP-TO end tag which clearly exists see below:
sMyXml = sMyXml + " <PURCHASE-ORDER-SHIP-TO>" sMyXml = sMyXml + " <DIRECT-QUESTIONS-TO>ATHOS PETROU</DIRECT-QUESTIONS-TO>" sMyXml = sMyXml + " <address:ADDRESS xmlns:address=""http://www.removed"">" sMyXml = sMyXml + " <address:NAME-LINE-1>Addr1</address:NAME-LINE-1>" sMyXml = sMyXml + " <address:NAME-LINE-2></address:NAME-LINE-2>"
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I know this idea of - if message boxes are used to display error messages inside a .dll and when the .dll is installed in a different computer (possibly a server machine), errors occurring inside that .dll will be shown in the server and not to the user. Since practically there will not be a person near the server to click 'OK' to the error message every time it occurs it will stuck the programs using the .dll.
So how to write exception handling to a .dll project?
I am working on getting ready to make a chat client. I want to be able to click a button and a new form come up as a tutorial to myself. Here is the code I am currently using.
CODE:
i am currently new to visual studio and am working on a small project for an it database. I am using a dataset connected to SQL2008, what i am struggling with is i would like a save button to check to see if any changes were made before the form is saved and then if any are detected then send it back to another sql table called "LogDetail" as a history, i hope that makes sence? I have two tables called "NewDetail" and "LogDetail".
View 1 RepliesBasically I want to Create a new thread which create a new timer.I can create a new timer in different button but when one of the timer has an idle time or sleeps the other timers also sleep. I do think because they are running in the same thread.
View 7 RepliesSo when i build or click debug on my program. No errors come up and its smooth. So i decide to publish my programme. However. I come up with a bunch of errors during the publishing.
Here they are:Error 1 Cannot publish because a project failed to build. 1 1 Simple CALC
Error 2 Unable to copy file "binReleaseSimple CALC.exe.manifest" to "binReleaseapp.publishApplication FilesSimple CALC_1_0_0_0Simple CALC.exe.manifest". The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters.
creating a vb application that reads info from a xml file and displays the content onto a form.here is the content of the xml file:
<?xml version="1.0" encoding="utf-8" ?>
<Book>
<Chapter title = "Introduction">
</Chapter>
[code].....
I am creating a program for an existing database that stores the info into the database. So can I link an already existing database in MS Access to a GUI?
View 2 RepliesI am trying to create a simple parent-child form in VB2010. I use a datagridview for each table/datasource and each is bound to the paretn/child table and each table grid fills correctly. What I want is the parent-child relation to enforce filling the child table with only rows that fulfill the current row on the parent. I have created a DataRelation in the form load, but it will not permit a relation between tables in 2 different datasets. If I attempt to place both tables in a single dataset and define the PK-FK relation in the SQL Serve,r I cannot create 2 separate datagrids from the same dataset.
View 12 Repliesi want to create a login form in vb using the visual studio 2010 and i am using the following code:-
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I have a project that will need several forms with a similar structure - a Data Grid View control, a few buttons and some textboxes. They are not similar enough to use just one form and change things programatically so I would like to create a "template" and add several copies of it into my project. My first attempts have failed miserably, ending up with lots of "conflicts" and "duplicate items".
So, how should I save a form from my existing project in such a way that I can then load in multiple copies (giving them suitably different names) without having name conflicts?
I'm trying to make an app for another application using GetAsyncKeyState.I coded what I thought to be good and clicked "Build". When I opened it, I tested it in notepad. When I hit NumPad2, it should return..[code]
View 3 RepliesI am getting these constant annoying errors in Visual Basic .NET 2010 Express. I'm pretty sure I'm not the only one, but these errors are always relating to images and resources The Type 'Global.ExampleProject.My.Resources.Resources' has no property named 'example.png'I am pretty sure these are bug, due to the fact that I get these errors after a while in most of my projects - it's absolutely annoying! Most solutions include removing the resources (commenting them out of the form designer code) and re-importing them... But then the problem comes back again after the project has been loaded a few times!
Microsoft suggest this is rather a user-related issue rather than a bug due to the fact that they can't reproduce the error.I'm still sticking to the belief of this being a bug - anyone get this error alot of the time?This is not the only bug I get - sometimes VB stops working when I try to build my projects!
I brought this up with VS 2008, and nothing anyone told me worked. No matter what settings I tried, or how many times I slammed the computer against the table, VS would still break on all errors rather than just unhandled errors. Perfectly maddening. I'm having the same problem with VS 2010. But, this time I can't find a setting that at least lets me pretend that it's supposed to work.
View 1 RepliesA need came up for me to work on a program that resides on a web server. I can't pull up the code and I get these errors:
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In addition, you must run Visual Studio in the context of an administrator account. I have never worked on anything like this before and for right now I would just like to look at the code. I Googled and found this: You can enable these features in the Add/Remove Programs control panel. In there you wiull find a link off on the left labeled something like 'Turn Windows features on or off'. Click that and you'll get a UI for managing the IIS features that are installed.
I looked there and don't have a clue what I should check. I'm on Windows 7. What should my approach be? I don't want to just clicking things in the IIS configuration console. The attachment is what I see.
copy a form without getting Duplicate reference errors that you would have to fix.So This is what i did and i felt i should share it now that i figured it out
File > Export Template > Item Template > Select Form To Copy
Then
Solution Explorer > Right Click on project title > Add Item > Select Exported Template > Rename file > Add Item
Whenever I setup a database connection, and then drag items from it onto my forms, I get errors! 102 of them to be precise.All I've done is create a data connection, add the datasource, created relationships and then dragged items ome. I've been working with databases for a while and have never had this problem when taking these steps.
View 7 RepliesI just noticed this, but I had a for loop where I incremented beyond the number of elements in an array. Normally this would thrown an exception.
This was in a form load event, and all that happened was the rest of the code in the event never executed. If I wasn't looking for what was supposed to happen next I never would have known there was a problem!
There was no try catch block there... but I would think it would still stop program execution with an error.
Can anyone explain this? Do I have some stupid skip error checked somewhere (if this exists, I'm going to be really annoyed)? In a button click event I put the exact same code and it threw the error... it seems to just be a problem with a form load event.
My IDE is VS2010 professional (vb)
I'm having difficulty with a log in form to a banking program I'm developing. If the user enters an incorrect username or password 3 times I want the program to not allow them log in.
View 4 RepliesI have this code:
Public Class Transform
Dim inputFile As IO.StringReader ' Object variable
Private Sub OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles ofdOpenFile.FileOk
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And I am getting these errors:
'Private Sub Transform_Load(sender As Object, e As System.EventArgs)' has multiple definitions with identical signatures. Line 15
'strOutputPath' is not declared. It may be inaccessible due to its protection level. Line 51
Type 'XslCompiledTransform' is not defined. Line 83
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I have compiled my app (Just standard windows controld, no third party) on my 64bit system to run on a 32Bit XP system. In have tried all the different settings (x86, x32, All) The error i get is: MyApp.exe has encountered a problem and needs to close. Sorry for the inconvenience. This is my first post here, I hope i havent managed to break any rules
I have developed a windows forms application in vb.net 4 which connects to a MSSQL database. I have used the built-in tools to add the data source, data connection and data set. (Data->add new data source-> etc.) The application is installed on staff laptops which may or may not have network connectivity and may or may not be able to access the server on which the database is held. Obviously this is causing unhandled errors when the program starts and tries to make a connection to the database. (using windows credentials) Does anyone know where in the code the connection is made so I can go in and add some error handling? Or any settings I can change to get visual studio to handle the errors nicely?
View 2 RepliesI created an even on a form called Sub New so I can handle some events and close the window down if there is an error.Upon doing that, I came across 3 errors that I don't know how to fix.[code] ShowDialog really isn't necessary I could just use .Show. I want to use ShowDialog because the line under those 3 shows the current form.How do I pass the date to the form?In case it's relavent, my code for sub new on frmEmail.[code]
View 7 RepliesI have a .net application that uses customerrors web.config module to display meaningful messages for errors. It works without any issues for 500 errors/exceptions caused by non-ajax and ajax components (updatepanel). However, in a scenario where updatepanel's asynchronous request times out, there is no error raised at all. I was able to see the timeout in firebug and come up with a solution that would at least display the error message as an alert and then redirect the user to the 500 error page using javascript but it's not quite doing what the rest of the application does in case of an unhandled errors like these. I basically just want everything to go through "LogEvent" mechanism so based on the severity of the error, it does the necessary work.This 500 error page doesn't have anything in the Server.GetLastError() for these timeout scenarios. Is this an expected behaviour? Can it be changed so I do have access to these timeouts in Server.GetLastError() OR maybe just run this error through "LogEvent" mechanism? Is there a better/more graceful way to handle this issue?
Below is my code to give you an idea, not exactly what I have in my application but pretty close.
Web.Config
<customErrors mode="On" defaultRedirect="~/Errors/ErrorUnknown.aspx" redirectMode="ResponseRewrite">
<error statusCode="500" redirect="~/Errors/Error500.aspx" />
</customErrors>
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I had no errors in my VB project it was compiling nicely. I loaded SP 1 today and now I have 102 errors. Actually I'm sure more than that as 102 is the max it will show. It particularly doesn't like the date functions and isDBNull. And it balks at vbcrlf now. Here are some examples of the errors I'm getting:
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I've written my own program to assist other engineers with their work at my company. Some people have been able to install the program with no problems, others can't seem to get it installed and I'm having trouble figuring out why. They install .Net Framework 4 as this is the Target framework that was setup in the file, although I don't think I fully utilize all the features yet and not sure when I will. I will post the portion of the log that contains the error. If anyone decode some of this so I can track down the problem. I'm not sure if downgrading the necessary version of .Net would work or not, but didn't want to be changing that unless there was a good reason too.
PLATFORM VERSION INFO
ERROR SUMMARY
Below is a summary of the errors, details of these errors are listed later in the log.
* Activation of V:EAUsersRCFPE Files SetupPE Files.application resulted in exception. Following failure messages were detected:
+ Exception occurred loading manifest from file PE Files.exe: the manifest may not be valid or the file could not be opened.
+ Cannot load internal manifest from component file.
ERROR DETAILS
Following errors were detected during this operation.
CODE:
In one of my applications, I decided to make a separate project for a few general classes. However, it started to give me tons of errors that I am having a difficult time figuring out.
View 7 Replies