Is it possible to use a constant defined by the compiler in code like below?[code]...
I'm running batch processes and I'm experiencing problems with one of my customer's data. I want to add special code for only that customer, but I want to keep the code there so I can easily switch the customer ID in the future should i need to debug a different customer.[code]...
I have two list boxes that have a list in each and each one has a constant. I am trying to add the selections that are made together and output the total in a third label. I am stuck at this point and am not sure how to proceed, it is entirely possible that i am doing it wrong. Would someone please have a look at this and let me know what the next step would be or if there is a different wayof doing it than I am.[code]...
View 4 RepliesI have an API that I created and currently utilize successfully in C#. I am trying to create an example of interacting with the API in VB.NET (so that the QA without C# experience can still utilize it for creating automated tests).
In C# I do the following
[TestingForm(FormName= "Land Lines", CaseType= _caseType
, Application= ApplicationNameCodes.WinRDECode, HasActions= true)]
public class LandLines : RDEMainForm
[Code]....
This gives me a compile time error because it claims that FORM_NAME and CASE_TYPE is not defined, even though the class has it defined inside.
How can I use the defined constants inside the class in the class attributes?
For those who still have lots of legacy code as I do in .NET 1.1, has anyone found a solution for this issue[url]...
The directory given in the command line will not exist, which makes sense given the error message. The problematic part is that everything works with a full rebuild. Since the "work around" is so easy, Microsoft of course is not going to fix the problem for .net 1.1.
To everyone who pre-emptively suggests an upgrade to .net 2.0+, that is not an acceptable solution, due to time limits and resources. To those who say that is not an acceptable excuse, go find another thread, not every company is perfect.
which compiler errors would be detected out by VB compiler?
I have searched out some compiler errors list for C#, for example, see the website at [URL]
MS provided us the information about C# compiler error. Does MS provide VB compiler errors information as well.VS
When I try to compile my project, I get this error
Error 1 Unable to copy file "objDebugoneForce.pdb" to "binDebugoneForce.pdb". Access to the path 'objDebugoneForce.pdb' is denied. oneForce.
How to rectify it? [URL]
Is is possible to write a compiler that would read/compile and run code from difrent forums?
View 3 RepliesI am calling this function when a button is CLICKED and received the error; The name "The" is not permitted in this context. Valid expression are constants, constants expression, and (in some contexts) variables. Column names are not permitted. Unclosed quotation mark after the character string 'True)'.
The function is as follows;
Private Sub Save()
Dim conn As SqlConnection = GetDbConnection()
Dim query As String
Dim cmd As New SqlCommand
Imports System.CodeDom.Compiler
Public Class iCompiler
Public Shared Sub GenerateExecutable(ByVal Output As String, ByVal Source As String, ByVal Icon As String)[code].....
I've been having trouble converting the following fairly straight forward c# code into vb.net 4.0, which I understand has anonymous delegates. I just havn't been able to figure it out yet.
_combo.DataBound += (sender, args) =>
{
var item = _combo.FindItemByValue(values[0].ToString());
if (item != null)
[code]...
I have tried the following
_combo.DataBound += Function(sender, args)
Dim item = _combo.FindItemByValue(values(0).ToString())
If item IsNot Nothing Then
[code]...
But the compiler complains that DataBound can not be called directly, but has to be called with RaiseEvents
This error first appear to occur randomly. Steps to recreate:Open Visual Studio and load a solution (some files automatically opened) - this is when the problem occurs Close all open files Restart visual studio and load solution (no issues)Open Exactly the same files again, restart visual studio and load solution so files open automatically (problem occurs!)
However, when trying to narrow it down to a single file (that is automatically opened when the solution is loaded), I couldn't reproduce the problem. Now with all the files open again the problem doesn't occur!!! So it looks like it is fixed - though this happened before and eventually the issue came back.
I think it is to do with one of the user controls with DevExpress controls on it - when the error occurs, the designer displays the error. Though I can't reproduce it at the moment to confirm that.
If I look at the IL that is created in Linqpad for the two following code snippets, I wonder what happens here.
In c#
int i = 42;
results in the following IL code
IL_0000: ret
whereas in VB
Dim i As Integer = 42
it is
IL_0000: ldc.i4.s 2A
IL_0002: stloc.0
Apparently, the c# compiler understands the the value is never used and thus simply returns nothing. In VB.NET the actual code is translated.Is that due to differences in compiler optimization or is there anything else at work?
Update: Just to clarify this - I just enter this one line into LinqPad and look at the IL it creates (most definitely by running the respective compiler). There is no program.
I have a similar problem posted in the forum similar to this : started learning VB. I am not able to get my example code to work to access an Access database through automation. The author of my book suggested that I might not have the correct Jet 4.0 engine. The specs I have are: MSJet40.dll, Dated 7/14/2009, Prod Ver 4.00.9756.0.
View 3 RepliesThere are a bunch of constants like vbTab in VB.Net, is there corresponding one in C# ?
View 1 Repliesi cant understand what constants are.
View 3 RepliesSay I have some constants that depends one of other, and I decided to keep them together in a container instead of keeping it as individual constants in a class.I thought use a Structure for that scope, but compiler force me to declare a private member for that structure.
[Code]...
How would you declare constants from a .dll, so you can use it in your program.
View 2 Repliesi was concerned if constants take up storage. if a class had 10 integer constants at class level, will that adds up to 40bytes of storage or is that actually not true because they are constants?
what i'm trying to do: find the best place to put the constants that i need to access at class scope, and whether its best to make them shared or not. [constants are private]
I want to define several constants of pens like SystemPens. How do I do that?
View 6 RepliesCan anyone explain what the following vbkey constants are as actual key presses? I've tried searching and really can't find any info other than vbKeyCancel = CANCEL key. Well, what's a cancel key? I dont have one on my keybaord...I read somewhere that CANCEL = Ctrl+C. Is that true? If so, what are the other few I have listed?
Constant
Value
Description[code].....
Every time I do something that ends up using windows API calls in VB, I always end up having to look up the values for the windows constants. Does anyone have a file with a class or something for VB that defines all the WIN-API constants?
View 2 RepliesIt would be good if visual basic had standard math constants like pi, the Euler number, and others built-in so one doesn't have to define them each time and have the possibility of making typos. Even some of the physical constants in MKS unit could be included like the Boltzmann's Constant, speed of light, permittivity and such. Each could be a special simple like kb for the Boltzmann's constant. Or it could be a properties like phyconst.c for the speed of light, phyconst.kb for the Boltzmann's, phyconst.sb for the steffan-Boltzmann's constant, pmathconst.e for e=2.71.
View 3 RepliesCalculate and display the total cost of the sale, as well as the total cost of all sales and the average cost of all sales. - Clear the box for the number of yards, the total cost, and return the quality, padding, and installation settings back to their defaults. Use constants for the cost of each quality of carpeting ($4.95 for Fabulous Flat, $8.95 for Precious Plush, or $12.95 for Super Sculptured), the padding charge ($1.25 per yard), and the installation charge ($3.50 per yard).
[Code]...
I've got a situation where I need a table of constants in my app. It's actually a table of 43 formatting options where the description will appear in a drop down and the detailed settings will be used by the codeIt appears that VB can't do arrays of constants. So I've fiddled around with a Constructor in a class that creates a new array then loads up each element with hard-coded .Add statements. It doesn't seem elegant though.So I then decided to try an XML file, that I load in the Constructor and assign the contents to an array. This is what I've decided is the best, most elegant, option - but I'm throwing this question in to see what you people might recommend ! The data is mostly strings
View 11 RepliesWe're trying to trim the number of assemblies we load during startup, and one of the easiest to cut is the Microsoft.VisualBasic assembly. There are alot of things in it that were easy enough to replace, like Left(), but I'm struggling to find a good way to replace vbLf and Chr(). vbCrLf was easy enough to replace with Environment.NewLine, but we have a few spots where we generate content for a Unix-based system that is expecting line feeds only.
View 5 RepliesThe code underneath works when I use WM_MOUSEMOVE but not when I use WM_NCMOUSEMOVE. Is WM_NCMOUSEMOVE not supported anymore?I use the correct values for the constants too.Protected Overrides Sub WndProc(ByRef m As Message)Dim MousePosition As Point
Select Case m.Msg Case WM_NCMOUSEMOVE MousePosition = New Point(m.LParam.ToInt32())
If MousePosition.Y < 50 Then CloseButtonState = ButtonState.Flat
Else
CloseButtonState = ButtonState.Normal
[Code]...
I am exporting data to an Excel spreadsheet from a VB.Net 2008 application. Now I'm trying to format the spreadsheet. So I am creating macros in Excel that format the spreadsheet, and then using the code it generates in my application. The problem is that the constants used in VBA are not being recognized in VB.Net (They are recognized in VB6). I have the following imports:
Imports Microsoft.Office.Interop
Imports Microsoft.Office.Interop.Excel
Is there something else I should be importing? For example, in this line, xlNone and xlDiagonalDown are flagged as not declared.
oXL.Selection.Borders(xlDiagonalDown).LineStyle = xlNone
I'm working with an API that spits out alot of data in name=value format. At first I processed everything by doing simple string comparison:
Sub ProcessData(ByVal name As String, ByVal value As String)
If name = "thisname" Then
DoThis(value)
[code].....
I inquired on VB's erratic behavior of treating all numerics as signed types back in this question, and from the accepted answer there, was able to get by. Per that answer:
[Code]...
after working with some VB.net files in a project, I find that somehow the values of hard coded numeric double values have changed,that is:[code]This has happened in a lot of the source files of the project.When does this replacement take place? While I can understand that the original numbers cannot be exactly represented as double, I do not want this substitution, is there some way to prevent them? Initially I thought that was some behavior of the source control system (TFS)
View 18 Replies