Try...Catch Creates Undeclared Variable?
Aug 19, 2010I am trying to catch an error that a directory does not exist. When I don't try for the error checking, this line works just fine:
Dim
xmlFolder()
As
[code].....
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Variable 'xid' Is Either Undeclared Or Was Never Assigned?
May 9, 2010I am using vb.net 2003 for a stand alone windows program. I access an Access database file via Jet 4.0 and OleDbDataAdapter.
The program is like a "check book" for commercial fishermen to track their landings in relation to the amount of "quota" that they have been assigned. The program is structured so a fisherman can enter multiple boat names and track each one seperately. To work on a particular boats account, the fisherman would select a boat name from a drop down list. The boat name is then captured and assigned the string variable name of "xid" and in a Module have this code:Public xid As String
I have used the DataAdapter Configuration Wizard to setup the data connection and assign the DataAdapter and DataSet. I went into the code and manually entered a WHERE clause to filter the data for the selected boat. The proper syntax was an issue that I had a problem with earlier, but once I got that correct, the program worked fine. The code that works is below:
[Code]...
[2008] Foreach Variable Undeclared?
Mar 9, 2009i'm using a foreach to loop through my regular expression like:
For Each secwordMatch As Match In secwordmatches
Dim secWord As String = secwordMatch.ToString
Next
[code].....
VS 2010 Compiler Creates New Variable Automatically When Use If Statement Without Strictly Declared Variable?
Jan 10, 2011Say that i have the following code that parse about 20k records from the DB.
Code #1
vb.net While reader.Read()
list.Add(If(Integer.TryParse(reader(0).ToString, 0), Integer.Parse(reader(0).ToString), 0))
End While
And then another code which does the very same thing but it seems to be a little cleaner.
Code #2
vb.net While reader.Read()
Dim storeowner As Integer = 0
Integer.TryParse(reader(0).ToString, storeowner)
list.Add(storeowner)
End While
This is what i am confused about; does the compiler creates a new variable automatically when i use the if statement without strictly declared variable? What approach is better in sense of performance?
Change Default Try-Catch Variable Name?
Jul 20, 2011I was wondering if it was possible to change the default variable name that shows up in the auto-complete for a Try-Catch block. It populates as:
Try
Catch ex As Exception
End Try
I want it so it populates as:
Try
Catch excError As Exception
End Try
Catch Exceptions Without Defining A Local Exception Variable?
Apr 6, 2011[Code]...
Notice the catch (Type) instead of catch (Type myVariable). Is this possible with VB.NET, or do you always have to declare a variable when you catch exception types, like so:
[Code]...
Catch The Input And Output Variable To A Textbox1 For Sending And A Textbox2?
Feb 1, 2010I am using vb2008.net express, I test vs2005term it work, can any tell me what is the input variable and output variable of this terminal? how to catch the input and output variable to a textbox1 for sending and a textbox2 for receiving when I press send button? is that possible? I attach the example of my question this is a a good source, but it is not relate to my problem: [url]...
View 1 RepliesC++ Undeclared Identifier - Object From .net Dll Class?
Jan 6, 2010I have a vb.net dll which I imported in an unmanaged c++ project.I successfully created an object of the class object using:
CComPtr< IWSconnection > pIWSconnection;
pIWSconnection.CoCreateInstance( __uuidof(IWSconnection ) );
Then, when I tried to call a method from the dll:
pIWSconnection.connect(...);
I am getting an error: pIWSconnection undeclared identifier.Why would the object work with 'CoCreateInstance', and not with 'connect'?
Warnings In Project Make No Sense - The Variables 'uxRecentlyOpened' Is Either Undeclared Or Was Never Assigned?
Aug 14, 2009I have a form called SearchScreen and on that screen is a custom control of class recentlyOpenedCompany called 'uxRecentlyOpened' within the form. I have made no changes at all to the SearchScreen form. I have added an aboutdialog to the project and deleted an about form. Thats itand
View 1 RepliesError - Catch Cannot Catch Type 'Microsoft.Office.Interop.Outlook.Exception'
Mar 25, 2011I have a program in VB.Net that receives mails from Outlook, extracts attachments and inserts the attachments into a table through a query. I would like to put the query/queries in a Try/Catch block, but cannot do so as Outlook exceptions cannot be caught, and it gives me an error, and unless I put a very specific exception, I cannot catch it. Is there a workaround?
Edit:
Try
Catch ex As Exception
End Try
Exception is underlined and when I hover on it, it says: "Catch cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not in 'System.Exception' or a class that inherits from 'System.Exception'". This is affecting all my other code which I'd like to put into a Try/Catch block.
Restructure Try / Catch To Eliminate Error On Myreader.close Command In Catch Part?
Jun 19, 2012The following code causes a "Warning" that Variable is used before value assigned.How do I restructure this Try/catch to eliminate error on the myreader.close command in the Catch part? Code appears to work fine but I dont like Warnings. [code]
View 8 RepliesButton_click Event Will Not Stop Execute After Error Catch Using Try - Catch Statement
Apr 1, 2011i have problem when i click a ADD button, there is one null value in the textbox .. so the try catch statemnt is to catch that null value error but after that the catch is success but the button click never stop excute the statemnt till the end of the button event.
View 6 RepliesNested Try...Catches - If An Exception Occurs In The 2nd Sub's Try...Catch, Which Catch Gets Excecuted?
Mar 4, 2009I have this scenario: in a Sub I have a Try...Catch statement.Within that Try..Catch I call another sub.In that 2nd sub is also a Try...Catch.(see below for example).Now if an exception occurs in the 2nd sub's Try...Catch, which Catch gets excecuted? The 2nd one, the 1st one or both?
Private Sub sub1()
Try
..do stuff[code].....
If Throw An Exception From Within A Catch, Does The Finally (from The Catch) Still Execute
Jun 2, 2009If I throw an exception from within a catch, does the finally (from the catch) still execute? i.e.
Try
..some code with an exception in it...
catch ex as Exception
throw new SpecialException("blah blah" & ex.Message, ex)
[code]....
Catch Log4net Exceptions / Use Try / Catch Approach
Jan 23, 2012I need to catch log4net exceptions (its own exceptions not app exceptions logged by it). I wish there's a way of doing it this way: [code] I have this code implemented and there's no errors in compilation but i force log4net to have an error (pointing to a non existing database in the config file) and nothing is threw.I've tried the listener aproach: [code] and it's writing the errors to log4net.txt, the forced ones i mean.This last aproach has a couple of drawbacks: it won't append every error to the file, if the error is the same it doesn't write it, i can't get the listener to write every error to that file, only one (I don't know how to fully configure the trace listener, it might be that). Thus it won't append the date and hour to every line wich is a necesity for me. Finally i can't give structure to it (xml). Even if the listener work i need to use the try/catch aproach, since i'm using ExceptionHandling from Enterprise library to log the errors in my app.
View 1 RepliesError 68 'Catch' Cannot Catch Type 'Microsoft.Office.Interop.Outlook.Exception' Because It Is Not 'System.Exception'
Feb 12, 2010I am using VB.NET 2005 to create a Windows forms application. I have a procedure named SendMail that creates an instance of Outlook.Application, to send an email from my application. I found the code on this forum, I think.The procedure works fine, but I can't use error handling with it.I call the procedure from a button click event. I put the procedure call in a try/catch block, and the application won't build, with the following error.
Error 68 'Catch' cannot catch type 'Microsoft.Office.Interop.Outlook.Exception' because it is not 'System.Exception' or a class that inherits from 'System.Exception'. C:datadevdmtiQTSQTSv7_1_20100212wQTSQTSReportsCriteria
pt_frmReportViewer.vb 43 21 QTS
Here is the code:
Sub SendMail(ByVal sFile As String)
' Create an Outlook application.
Dim oApp As Outlook._Application
[code]....
Catch' Cannot Catch Type 'Object' Because It Is Not 'System.Exception' Or A Class That Inherits From 'System.Exception'
Aug 10, 2010I'm getting 'Catch' cannot catch type 'Object' because it is not 'System.Exception' or a class that inherits from 'System.Exception'. and 'Expression detected' Code underlined in blue: Catch obj1 As Object When (?)
Private Sub OpenJAMem()
Dim num3 As Integer
Try
[code]....
'Catch' Cannot Catch Type 'exception' Because It Is Not 'System.Exception'?
Apr 16, 2012I have a project converted from Visual Studio 2005 to Visual Studio 2010. It compiles and runs.
When I prune "unused references's from this project as listed by Visual Studio, the project fails to compile with the subject error message.
In particular one of the "unused refererences" is to "Microsoft.VisualBasic.dll". The IDE does not allow me to add back this particular reference.
What do I need to add back as a referenceto get this items?
Try/Catch - "Don't Catch Exceptions That You're Not Willing To Deal With"
Apr 20, 2010A few weeks back in reply to a thread, I said then that it's sometimes worse to use a Try/Catch when there's nothing in the Catch!There are exceptions to that I'm sure, but too often the Try/Catch is used with a blank Catch that makes even the developer scratch their heads when the program crashes because they have nothing to go on (by their own doing).DevExpress (and I'm a big fan of their stuff) has a little three minute video that encapsulates that concept well and I thought that you all might enjoy watching it:[URL]
View 1 RepliesControl Creates Another Same Event?
Sep 29, 2010i already finish this module but while doing 2nd module i notice that my 1st module doesnt work anymore, then i checked my code, i double click the control at design time and thats it instead it brings me to my actual code of that control, it brings me to another event, like this, this is where my original codes are placed:
Code: Private Sub lblSupplier_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub then, after the poblem occurs, the control created another event like this:
Code:Private Sub lblSupplier_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub notice the difference, they are the same click event but the other one has an "_1" at the end of click.
Creates Two DateTime Objects?
Apr 13, 20111. Write a Visual Basic Console Application which creates two DateTime objects. One DateTime object should be used to store a value for date purchased. The second DateTime object should be used to store a value for date paid. See below for more information.2. Assign values to the two DateTime objects. See page 197 in your Doke & Williams book for help with this step.3. Use the toString method to display the two DateTime objects. See page 197 in your Doke & Williams book for help with this step.4. Compare the two dates to determine which date occurred first.
[Code]..
Product That Creates Web Forms On Fly?
Jul 17, 2009Anyone know of a product/solution that creates web forms on the fly? I want to allow my users to create their own web forms.
View 1 RepliesProgram That Creates New Objects?
Mar 30, 2012I have a Car object that does a few things, but I need the program to create New Cars without having to write the code for every new one. Basically, the user checks some combination of Checkboxes and then pushes a button. And I need the program to create a New Car with a unique name for each combination of checked Checkboxes when the button is pushed.
For example, if Checkboxes 1,3,5 were all checked, it would create a New Car that had a different name than the New Car that is created when Checkboxes 1,2,3 are checked.
But I also need the program to be able to check when a New Car has already been assigned to some combination of checkboxes, so that it doesn't create a New Car every time that Checkbox 1,2,3 are checked and instead will use the Car that was already created.
RangeBar Sample Creates Big Red X?
Jul 31, 2009The sample program for the Chart Control is written in C#. It provides VB snippets but there appears to be a key piece of information missing or at least hidden. Can anyone explain to me what is needed to get the Chart Control working in VB.NET VS2008 Pro?Using the Chart Controls sample, I tried to create a RangeBar. The only thing showing is a big red X across the chart. Here's the code almost exactly as taken from the VB sample:
Private Sub ChartSample()
' Populate series data
chrtTCP.Series.Add("Tasks")
[code]....
15 Minute Timer Creates Error
Oct 19, 2009The program runs off a timer that execute the cndstart button every 15 minutes but then it throws out a variable not defined error "oleasMailItem" but if I take the timer out and click the cmdstart button then the application runs fine without errors and I don't know where I went wrong if I add the timer
[code]
Option Explicit
Dim MinCount As Integer
Private Sub cmdstart_Click()
[Code]...
Code That Creates A Button Onto Form?
Mar 26, 2011Is there code that creates a button onto the form? The button will not exist until the code is run.
View 1 RepliesCreate A Program That Creates An .EXE File?
Aug 6, 2009I was thinking about creating a program that creates an .exe file. (I know that that is very difficult but I have 3 days that I'm not sleeping because i'm thinkin about it)The program should create the .exe file on button clickThe created exe should be in Normal Windows State, it should have only a button that doesn't do anything and it's path should be C:UsersAdministratorDesktop
View 4 RepliesCreated A Program Which Creates Folders?
Dec 15, 2009A weird thing just happened. I created a program wich creates folders and now when i want to "save as" an excel document in a folder created by my program this error occurs:[URL].. But this only error occurs if i try to save as an excel document
View 7 RepliesPossible To Remove The Default Namespacing That Creates?
Feb 5, 2010Converting a C# project to VB.NET, C# projects start off with namespace Foo { in each class. Is it possible to have the same behaviour in VB.NET?
View 1 RepliesStreamwriter Creates File, But Is 0 Bytes?
Feb 25, 2009I am using the following code to write and empty (dummy) file to take up the remaining space on a device.RemSpace is a Public Variable declared as Long I have a function that gets the remaining space on the device and stores in the RemSpace variable (in bytes). I have tested with a msgbox to display the result of RemSpace, and it comes back correct (not 0). However, when the following code attempts to create the dummy file, the file is properly created but is only 0 bytes. What am I missing here?
[Code]...