VB 6 Code Conversion To VB Express - Warning: Variable StrEncTemp
Nov 24, 2010
I am converting a VB6 program to VB express and am having a couple of problems. One of them is a problem with the variable "strEncTemp". I have the warning "Variable strEncTemp is used before it has been assigned a value", and I can't assign a value to this variable without creating issues. It also seems that a null value is being returned and the code produced by this routine is corrupt. This seems to be the last issue I have in converting the code. I tried setting it to 0 but it then shuts down the program with an error. This is the portion of code that has the warning and produces a null value. [Code]
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Apr 19, 2008
This program is for advertising ads and prices are determined by which radiobutton is selected.This program uses objects created from a class . I am getting a waring message that Variable 'ad' is used before it has been assigned a value. A null reference exception could result at runtime. the warning is at ad.size = 225.So how do I get the variable filled before used if it depends on which radiobutton is checked? [code]
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Nov 15, 2010
Today I discovered that something I had assumed about VB.NET for many years was not true (worrying!). I assumed that a variable declared within a loop had a lifetime of the iteration it was declared in, but in fact it seems it has a lifetime of the whole procedure.[code]I had assumed an output of False, True, False, True but instead it is actually False, True, True, True..In C# the equivalent code would not compile as you would get a compile time error of Error "Use of unassigned local variable 'var1'".I realise there are many ways to fix this and that best practice would be to declare the variable outside of the loop and reset it at the beginning of every loop through.I find this behaviour so counter-intuitive to me that I would like at least a compile time warning in VB.NET when/if I do this. (I could also then set this on any projects I already have and get warning that would allow me to check that my assumptions aren't causing errors).Does anyone know how/if I can get this to generate a compile time warning in VB.NET? Am I the only one that finds this counter-intuitive?
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Mar 31, 2009
I've been mostly working with VB.Net for over a year and just noticed this Am I going insane, or does VB.Net NOT have an "Unreachable code" warning? The following compiles quite happily with nary a warning or error, even though there is a return between the two writeline calls.
[Code]...
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May 30, 2010
"Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated".I have this message showing up that references this code in the keyup event:[code]I am just testing the trapping of keys right now. The code still works but I am uncomfortable with an unresolved warning.
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Dec 31, 2009
I'm quite new to VB. I had open a VB6 file using VB express. Then some error arise after the conversion 1st error: Value of type 'Char' cannot be converted to 'Double' (Highlighted in Red)
Option Strict Off
Option Explicit On
Friend Class MainForm
Inherits System.Windows.Forms.Form
Private Const VendorID As Short = 6017
Private Const ProductID As Short = 2000
[Code]...
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Oct 3, 2011
I'm just using the default SQL Server Express in my vb 2008 express edition as my database server for my database operation. When I tried to update the records on my table I got a runtime error which indicates the error on this line 'myCommand.ExecuteNonQuery()'and it highlights a yellow background on it. The runtime error says "SqlException was unhandled: An expression of non-boolean type specified in a context where a condition is expected, near 'Number'. ".
Imports System.Data.SqlClient
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim myConnection As New SqlConnection
Dim myCommand As New SqlCommand
[code]....
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Jun 8, 2011
I`m trying to write a programme ,in VB2008 Express, to receive Serial Port Ascii data ( from a Multimeter) and display it as Hex Data in a textbox. I can get the Ascii data to show, but just cannot convert it into Hex. Once I can do this I want to write a new front end for the Mulimeter software.
This is what i`ve written so far :
Imports System
Imports System.IO.Ports
Imports System.Text
[Code].....
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Jun 23, 2009
I read in a unique file type, its called .pkm, it's just a collection of hex data. Anyways, I'm using VB Express 2005 (or 2008 since it's free), and I read in the file, and printed out the values. It printed out the ASCII character equivalent, so all I saw were the weird symbols and all (the hex characters in this file do not convert using ASCII). What I want to do is convert it to hex so I can see what the hex values are.
Code:
Dim file As String
Dim data1 As String
file = "D:Documents and SettingsownerDesktopPokemon7-10-08_10ANNIV_ENG_Lugia.pkm"
[Code].....
Too bad image code is off. That is a screen from a hex editor that reads it in properly. Currently my program displays it the way it is seen on the right, but I need it displayed the way it is on the left, in plain hex.
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Jun 24, 2009
I'm automating Visio 2003 from a VB.NET app. My code looks like this (with the uninteresting stuff removed):
Dim objApp As New Microsoft.Office.Interop.Visio.InvisibleApp
objApp.Settings.ShowFileOpenWarnings = False
Dim objDoc As Microsoft.Office.Interop.Visio.Document
objDoc = objApp.Documents.Open(VisioFilename)
I've found that the last line causes Visio to raise a hidden MessageBox saying:
Macros in this document are disabled because the security level is high, and the macros have not been digitally signed or verified as safe. To run the macros, you can either have them signed or change your security level.Since this is going to be running on computers I don't control with files I don't control neither of those options works for me. I really don't care that the macros are disabled, I'm just using Visio to convert the file from it's native format to SVG. I certainly don't want to suggest to users that they lower the security level, nor would I want to lower it for them.
As you can see from my code above, I turn off file open warnings but that doesn't seem to include the macro warning. Since I'm using Visio.InvisibleApp it turns out the warning isn't displayed to the user. Running a visible instance of Visio won't help because I'm creating a batch converter, even if the message was visible it means the user would have to click OK for each file. That would make the batch conversion feature essentially useless.
I see that the Visio class has a VBAEnabled property but it's read only. If there was a way I could just turn off VBA when opening the file it would likely solve the problem. I've looked all through the properties and through the Settings property on the class and can't find anything. I've done a bunch of Google searching and can't find anything that addresses this issue.Anyone know if that warning can be suppressed when using automation with Visio? Can I do it if I switch to Visio 2007?
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Nov 21, 2009
i get a warning " 'functionDealWithHiddenFields' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used."
Example function:
vb.net
Function functionDealWithHiddenFields(ByVal HTML As String, ByVal numHiddenFields As Integer, ByVal X As Integer)
Try
[code]....
The functions still work correctly (as far as i can tell) what would i need to do to the above function to remedy that warning?
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Sep 19, 2011
I have this VB crypter I am trying to build, but I am getting 2 warnings. I Would like some help if someone has the time. Please PM me and ill send you the crypt.Warning 1 Function 'ReadEOFData' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used. I:Usersn oahDesktopI am CrypterI am CrypterForm1.vb 189 13 I am Crypter
Warning 2 Variable 'Buf' is used before it has been assigned a value. A null reference exception could result at runtime. I:Users
oahDesktopI am CrypterI am CrypterForm1.vb 203 19 I am Crypter
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Dec 25, 2009
Couldn't think of a better title.(Background on the problem/me)Okay, so, first question/post here, so hi. Now that that's done with, the information pertinent to my problem. I'm fairly new to VB (and programming as well, aside from screwing around with C++ and learning assembler(well, attempting is the better word) god knows how many years ago), and have only seriously been programming for about under half a year, and my skill level is about at that stage. Only been using VB.Net, nothing older. Depending on the time of day and if I'm home or at school, I fluxuate between VB express and Vis Studio 08. Umm, this program I'm having trouble with was on a test that I took yesterday (took the problem home with me cause I really wanted to figure out what was wrong with it).
The stipulations of the test were:
No For->Each Loops
No using Built-In Sorting or Searching Functions
[code].....
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May 13, 2011
I have a VB.NET command line project in Visual Studio 2008. There's a point at which I need to parse through an arraylist and output the contents to a file name based on a value in the arraylist. As I'm interating through the arraylist, I don't want to open and close the streamwriter every time as it causes it to be very slow. Instead, I want to check to see if a value is same as a the previous iteration of the loop, and if so simply do another "writeline" to the streamwriter. See snippet below:
[Code]...
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Jun 6, 2012
Does anybody knows if it is possible to convert a numeric value into a System.Drawing.Color (or Pen) value? I need to implement the following code:MyBitmap.SetPixel(x,y,MyColor)
MYColor is a long integer and does not work because the above code needs a system color.
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May 23, 2011
I have a strange problem with the following code:
Code:
Private Sub Listener()
Dim infiniteCounter As Integer
[code]......
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Apr 25, 2012
I'm having trouble tracking down what is wrong and causing the above error. This only occurs when saving the design view in VS 2012. The code builds and runs fine.Full error text:Code generation for property 'CompanyValue' failed. Error was: 'Property accessor 'CompanyValue' on object 'ContactViewUC1' threw the following exception: 'Object variable or With block variable not set."
CompanyValue definition in ContactViewUC:
Public Property CompanyValue
Get
[code].....
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Apr 9, 2010
Although I have been programming for many years, successfully, in many different languages, translating my large Word VBA application into VB 2008 Express is driving me crazy. While I understand the theory of OOP and have even been on object-oriented courses, it seems I can't declare my objects correctly and use them in my code. As far as I know, I'm not trying to do more than the "language" is capable of doing, but here goes.
I want to start with "aList" which would be a Collections.Generic.Dictionary(Of String, String) object. Then I want a "bList" which is also a a Collections.Generic.Dictionary object. I would like each bList item to have a few individual simple properties (like a Byte and a String) then an aList instance as well. The application then gets a bList key value from the user, "copies" the corresponding bList item values into a work area, and does the necessary processing using the various bList(aList) / aList(bList) item values from the work area. I say "copies" because I assume that part is simply going to be a pointer copy rather than a long copy of lots of strings. Note that I really don't want to start using arrays here, as the application makes alot of use of Word VBA Dictionaries and I'd like to keep it that way if I can. Incidentally, so far, I have all my global data declarations in a separate Class, not on any of the application's forms.
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Mar 4, 2009
Intellisense in VB 2005 Express is showing lots of member items when hovering over a variable instead of showing the variable value. For example, when hovering over DataRow("Field"), instead of showing what's in Field, it shows all the members of the Datarow object.
Is there a way to change this, so I can see variable values without using the debug window like so, ?Datarow("Field")
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Jul 6, 2011
I am converting a C# Web Application to VB.NET. The problem occurs with the line "Array.Sort". I am unable to find a VB.NET equivalent of this line.
ArrayList arrSymbologies = new ArrayList();
get all public static properties
PropertyInfo[] propertyInfos;
propertyInfos = typeof(BarCodeReadType).GetProperties(BindingFlags .Public |
BindingFlags.Static);
[code]....
I tried different online (free) C# to VB.NET converters, they convert is as follows, but the Visual studio 2008 give errors (BC30201: Expression expected. ; BC32017: Comma, ')', or a valid expression continuation expected.)
Array.Sort(propertyInfos, Function(propertyInfo1 As PropertyInfo, propertyInfo2 As PropertyInfo) propertyInfo1.Name.CompareTo(propertyInfo2.Name))
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Feb 15, 2012
convert this code into vb.net im using a device w/c is digital persona fingerprint scanner, the code works but it does not show any scanned image of the fingers in vb.net
[Code]...
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Feb 18, 2012
PHP
<?php
$var1 = $_POST['userAge'];
[code].....
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Mar 1, 2012
I want to convert this vb into c#, I cant correct it
Public Function encryptPassword(ByVal Password As String, ByVal Salt As String) As String
Using HashTool As New SHA512Managed()
Dim PasswordAsByte() As Byte = System.Text.Encoding.UTF8.GetBytes(String.Concat
[CODE]...
I was suggested this code:
public string encryptPassword(string Password, string Salt) {
Using;
((void)(HashTool));
[CODE]...
But it wasn't correct at all.
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May 31, 2011
What the vb.net code should be of below c sharp code? [code]
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Sep 9, 2010
CODE:
Explain what the lines of code above are doing? i'm more interested in the first line as the method it is written in exits when it hits that line, so apparently the variable oXML isn't being set. i know that oXML is supposed to be set to some kind of COM object but can you explain the "Msxml2.DOMDocument.4.0" part a bit more? what is that, where is that, and what will it look like in .NET (this code is a classic asp)? i don't know what the second line of code above is either but the method never even reaches it so if you have any ideas about what that is doing would be great too.
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Jan 12, 2011
I am starting on the NHibernate world and i am experimenting with the NHibernate CookBook
recipes, i am trying to set a base entity class for my entities and this is the C# code for this. I would like to know whats the VB.NET version so i can implement it in my sample project
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Sep 20, 2011
Can anyone convert these C# code to VB.NET
NetworkChange.NetworkAddressChanged +=
new NetworkAddressChangedEventHandler(NetworkChange_NetworkAddressChanged);
[code].....
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Nov 29, 2010
I have the following macro that copies a set of rows and using the "Insert Copied Cell", replicates those rows.
[Code]...
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Aug 4, 2009
I have a VBnet program that works fine and I'm hellbent on getting it to run under Linux eventually (looks like mono is the way to go sometime soon). But, for now, I'm looking at some of these code converters, online and otherwise and have some questions.
I tried a single procedure of code with the online converter and it threw quite a few errors relating to the procedure lines themselves (the opening Private sub etc, etc,)Something about C# and handles clauses -- can't remember.
So, I suppose the online converter just wants to see the code itself? As in, what lies between the Private sub blah -- CODE -- end sub?Now, what about something I saw this morning, "Sharpdevelop" that says it can convert entire PROJECTS to C#? (Also saw a 200.00 software package as well).
Is that the way to go? Will it do every bit of the project's code start to finish? You just load the project folder or the project file I guess?But then I see Sharpdevelop doesn't compile -- so you convert with it and then open the converted file with Visual studio C#.net?
I guess Microsoft will never have this conversion capability in visual studio?
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Oct 19, 2011
I have downloaded a quick day view calendar control for my app. While it meets my needs I am having trouble converting the C# code to create a new appointment. Is anyone here good at code conversion?
The control is here:(url)
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