Our programming teacher taught us to use the Hungarian notation (e.g. intMyInteger, strMyString,...) while programming.But I have heard somewhere this isn't actually used in the professional world. Is this true?
Edit: I just found out this is actually "Leszynski"
I am trying to have a firm grasp of VB.NET and wondering if there is a way to use a double dot notation instead of the single dot notation people are normally accustomed to?The double dot notation that I want to implement is shown directly below:
PersonData.Birthdate.IsValid
Currently, the only way I know is by using the call shown below which I suspect is not using the full capabilities of .NET:
Validations.IsValid(PersonData.Birthdate)
My code is shown below:
vb.net
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
modVar.intDay = 25
[code]....
I set the culture to Hungarian language, and Chr() seems to be broken.
System.Threading.Thread.CurrentThread.CurrentCulture = "hu-US"
System.Threading.Thread.CurrentThread.CurrentUICulture = "hu-US"
Chr(254)
This returns "ţ" when it should be "þ" However, Asc("ţ") returns 116. This: Asc(Chr(254)) returns 116.Why would Asc() and Chr() be different?I checked and the 'wide' functions do work correctly: ascw(chrw(254)) = 254
Mostly because of reading this site, I'm trying to move away from Hungarian Notation. Or I guess the improper (system) Hungarian.
I can figure out a better way to name most data types, but I don't know what to do with objects. What would be a good naming convention for objects? I use objRS for recordsets now.
I've created an application where our clients can have access to our program by logging in. It uses our database for most information. I want to implement a richtextbox where it saves notes but i don't know if i should be saving that information as a file or what. Also I also have an application that handles everything that deals with our clients I also want to implement a messaging system that can leave a message to the client upon opening the application if they are missing any information that we require. Can someone point me the right direction on where to learn about this.
View 2 RepliesIs there any official notation for private fields? Like mVar, m_var or another notation?
View 10 RepliesI've got an app that sometimes stores some decently small numbers, such as 0.000023425. These numbers get loaded up in TextBox controls for users to edit.
Dim number As Double = 0.000023425
someTextBox.Text = number.ToString() ' Shows "2.3425E-05"
As mentioned, the text that shows is 2.3425E-05, which isn't exactly intuitive for the user to see, plus I have numbers even more precise (out to 19 decimal places). I would like the output to be fixed point. Of course I could easily and cleanly do:
number.ToString("F20") ' Shows "0.00002342500000000000"
But then there's an annoying number of zeros left over. So, to fix that, I could do:
number.ToString("#,##0.####################") ' Shows "0.000023425"
Which is what I want, but is there any better way to do it than to have that giant ugly format string there? So, ok, it's not that ugly, but surely there's a different way, right? My goal is to show the raw value being stored in the DB in a friendly way, and I would rather not have to force a format on the number at all.I found that changing the underlying datatype to Decimal solves the issue.
Dim number As Decimal = 0.000023425
someTextBox.Text = number.ToString() ' Shows "0.000023425" instead of "2.3425E-05"
So it sounds like Doubles aren't precise enough to be displayed normally?
The only post I can find on this matter is one that coverts the double to a decimal before converting it into a string. However the numbers I'm using are far larger than what a decimal can store.
Example: 1/(16^10)
So how can I convert the solution to the problem above. Which equals 0.00000000000090949470177292824, to a string value that is exactly as it's shown?
Cause when I convert this to a decimal I still end up with a string in scientific notation..
I can not column 4 of my Datagridview1 to display numbers as ###,###,### with not decimal places it seems stuck in Scientific notation mode, even though I have set it several different ways in the menus.How do I set it in the program like I set the column width.
DataGridView1.Columns(2).Width = 80This is in VB ExpressGary
I've written a small program that does some calculations and I want to display some of the results in scientific notation. For example, I want to display 0.005 as 5.0E-3.
View 2 RepliesWhat would be the best approach in Vb.Net to generate music notation by importing a MusicXML (example below)
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE score-partwise PUBLIC
"-//Recordare//DTD MusicXML 2.0 Partwise//EN"
"[URL]">
<score-partwise version="2.0">
[Code] .....
There is a Select overload that adds an index to each element of a sequence :
[Code]...
Can this query be written in Query Notation ?
6/0
6/1E-10
6/2E-10
[Code].....
I need those in there true form not scientific notation, how do i do this in vb.net?
I am deveolping a charting program and have a need to have dynamic draggable labels on the chart for notation purposes. Everything works fine until I try to drag a label past the 32767 (16 bit limit).
Here is the code that I drag the label with:
If ISDRAGGING = True Then 'DRAGGING LABEL
If CURRENTLABEL.Tag = 2 Then
CURRENTLABEL.Left = 0
[Code] .....
I have tried to create a new label and override the Top value with a Long Value, but it still does not do the trick. Hhere is my attempt to overload the top value to an integer.
Public Overloads Property Top() As Long
Get
Return _Top
End Get
Set(ByVal value As Long)
[Code] .....
The charts are dynamically generated from a database and represent depths. Usually at least 10000 feet are plotted at 5 pixels per foot. So some labels will be created or dragged below this 32767 line regularly. Any way to be able to drag the labels past this limit, or possible another option to be able to view these long charts.
I am working on a project that involes reading an Excel file, picking through it, then creating a flat CSV file. One of the the data elements I am picking up is a 9 character string that may be numeric, or contain one or more alpha chatacters. Excel has a nasty habit of converting long numerics to scientific notaion. I can overcome this by converting the "general" string to "TEXT".
However, there is one instance where I can not get the function to work...the string is "90333E108" ( the CUSIP for USU). Regardless, the text string is saved properly into the CSV file. When opened in a text editor, it reads correctly.
When opened with Excel, it is in scientific notation. Changing the field to "text" from "scientific" still displays "9.03E+112".
how to create an csv file that Excel will open and read correctly?
You can test this by creating an Excel workbook, format all cells as TEXT and add the following data:
90333E108
123
2
[Code]....
can i use an inverse notation in the databindings to enabled or disabled one checkbox?I have a form that has several controls binded, and if i have true in one field in the database i need to check checkbox and disabled it.Something like:
vb.net
chk.DataBindings.Add("checked", bs, "MyDBFieldBool")
chk.DataBindings.Add("enabled", bs, "MyDBFieldBool")
This can be done directly?
I'm working with Ticks a lot at the moment and when setting a timespan/similar, I find the shorthand exponent notation 3e6 far more easy to read at a glance than 3000000
VS converts to the long form as soon as it tidies up the line.
Is there any way to turn off the editor feature which reformats this?