When are predicates appropriate and what is the best pattern for usage? What are the advantages of predicates? It seems to me like most cases where a predicate can be employed a tight loop would accomplish the same functionality?
View 3 RepliesI am trying to use my first predicate and I generate the error:Method 'Public Function FindIndex(list As MyProgram.HTMLFiles) As Boolean' does not have the same signature as delegate 'Delegate Function Predicate(Of T)(obj As String) As Boolean'.[code]
View 12 RepliesGet the current number of usage days, unique usage days, etc in an evaluation license using CryptoLicensing Generator.
View 1 RepliesHow do I get the cpu usage percentage to display in the label on a form?
View 4 RepliesPrivate someSub()
If someBoolean = True Then Exit Sub
' do some great work because someBoolean is False
End Sub
I know there is a name for this. The idea is to check something and if it isn't what you want then you stop code processing. I thought it was called "escape pattern", but Google isn't confirming that name.
when should a trigger in your head go off signifying "Aha! I should use the factory pattern here!"? I find these moments will occur with many other design patterns, but never do I stop myself and think about this pattern.
View 6 Repliesi got this var: dim myvar as string
[Code]....
(Someone know how insert this ==>"<== into a var ? In PHP i use " ex: myvar = "Console.Writeline("hii")" but didnt work in vb net, how do it ?)
How to use MVC Pattern efficient?
View 8 RepliesHow would I remove an alpha-numeric sub string in a string that meets these rules:
J111DD
L###LL
l = Leter
# = Number
I am using the Entity Framework with POCO's generated using the T4 Templates. I have the generated classes in a separate assembly. Ok, so a very simple example: I have a Category entity in the model which has SubCategories (1-Many with SubCategory). When I use the following code, I get The ObjectContext instance has been disposed and can no longer be used for operations that require a connection. [Code]
View 2 RepliesI am normally a c# programmer but am now working in VB for this one project when I use to set up a singleton class I would follow the Jon Skeet model
public sealed class Singleton
{
static Singleton instance = null;
static readonly object padlock = new object();
[code]....
I get StackTracker.Instance.Instance and it keeps going, while it is not the end of the world it looks bad.is there a way in VB to hide the second instance so the user can not recursively call Instance?
In this discussion let us discuss every usage of interfaces in .NET. Any real time examples and difficulties in using interfaces can also be discussed here.
View 6 RepliesHow would i moniter how long a user uses my program and when it reaches a hour it will close the program, but then the user will have to wait 24 hours before they can gain accesss to the form again perhaps open a msgbox that shows how long is left till it can be used I like.. [code]...
View 2 Repliesim making a task manager and want to get cpu usage of a process this is how my code looks now
For Each proc As System.Diagnostics.Process In pList
Dim lstStuff As ListViewItem = New ListViewItem()
lstStuff.Text = proc.Id.ToString
[code]....
everything works but the cpu part it returns values over 100%?
im using visual basic 2010 express and im wanting to know how i can display the CPU usage (over all CPU usage like you would find on the task manager), the RAM usage, the temperature, and the frames per second all in separate list boxes.I have searched around on the internet for a long time looking for the code's to do this, none seem to be compatible with the 2010 express version.
View 12 RepliesI was told to use this to specify a folder that I want my node to go to.
(Declaration)
<ComVisibleAttribute(True)>
Public Enumeration SpecialFolder
(Usage)
Dim instance As Environment.SpecialFolder
I was thinking in doing some voice chat in my application which requires the use of UDP.
If you know any useful articles or can give me a boost I will be very glad and obliged.
I have data like this in text file
202103
20204
20210
202110
I want to change the above data to be like this
(2 2.50 03.0)
(2 2.00 04.0)
[Code]...
I have text like following example
XXZZXXXZXXZXXXXZZZZZZXVVVVVXZVZ
and also I have two patterns like XX and ZZ I want to find longest possible string which include above given two patterns and return starting and finishing index of the array.
How do i find a pattern in richtextbox?[code]...
View 2 RepliesI want my app to look for a byte pattern in a process and return the first memory address of that byte pattern. I know I should use ReadProcessMemory and a loop, but I don't really know how to create a function for that,
View 2 Repliesvalidating a 9-digit number.
CANNOT BE -----------
000000000
111111111
[code]....
I had just managed to get the first piece done -- "^(??!0+|1+|2+|3+|4+))d{9}$"
I have a contextStrategie :
Shared Sub New()
If ConfigurationManager.AppSettings.GetValues("Context").ToString = "Custom" Then
_context = New CustomHandler
[code]....
I'm trying (for test purpose) to obtain the name of the class used for my instance :
Dim context As ContextStrategie = New ContextStrategie()
'what I tried :
test.InnerText = context.GetType.Name
What I tried return ContextStrategie, which is useless to me.obtain either CustomHandler or XMLHandler?
ok what i'm trying to do is make a pattern generator. i will have to do some substuutting too.ex:i wand to make A=1,B=2,C=3 ect.......the pattern is 3,3,2,3,3,3,2and say i make a button called "E" when i click that i want the patter from e since E=5 in the textbox it shoud come up "E,F,G,H,I,J,K,L" up to 8 thats all i want is it possible
View 17 RepliesI am working on creating a customized UI composite control. This control would be a container to several other custom controls.As a first step, i am creating the container UI using a singleton pattern. This is because at any point in time only one isntance of this container is allowed to be created. This is fine.Now i want to practice interface based desgin. So i introduced a sinple interface calleD IdesignSurface which has two properties. I would like my singleton class to implement this interface,so i tried something like this and got an error saying "end of line
NotInheritable
Class DesignSurface
implements IDesignSurface
[code]......
Im trying to Implement the Singleton Pattern and im wondering if this is "Thread Safe" or if I am going to have to explicitly perform a SyncLock on the object instance? Example:
Public NotInheritable Class SingleTon
Private Shared _singleton As SingleTon
Private Sub New()
[Code].....
I tried it both ways, using the SyncLock and without, just not sure which one to be using?
Using VB.Net, I'm looking for best practices in dealing with the following idiom:[code]What I really want is something VB.Net doesn't offer -- additional and simultaneous iterators on For Each statements.[code]I'm interested in both Linq and non-Linq recommendations, comments about Copy method design, comparisions to C# or other languages.
View 3 RepliesIt is for vb.net 2008 with access database.At the moment it matches based on paramValue, and needs an exact match.How can I change it to look for a pattern instead?? For example I want anything that contains the text "Fizz" and then "Bom".[code]...
View 2 RepliesWhat would you recommend as the "best" VB.NET and C# books for learning Design Patterns?eferably books that actually give examples of when to use the patterns. I need torecommend some books to a group of C# and VB.NET developers.
View 19 RepliesI was considering validating some input using RegEx to match a pattern of
Firstname, Lastname
I largely have it, but there is so much variability in names that I'm not quite sure if any pattern is safe. In fact, in this case, I know that no pattern is safe, so I have built in a means for the user to accept whatever was entered, regardless of what it was, which isn't so great.
What I'm wondering is whether or not there is a safe Regex pattern that will cover names in this format, or will cover at least most of them. What I currently have is:
"^[A-Z][a-z]+, [A-Z][a-z]+"
But that will allow through things like Hiker, Shaggy, the, which is fairly silly, but shouldn't be allowed....I think. Does anybody use names with commas in them? I know that apostrophes are fairly common, though I'm pretty sure I can ignore them.