generating unique ids for invoices,customerids and employee ids, etc. and thought it would be great to share this as i will use it within my aps all the time now.[code]
View 7 RepliesHow would I go about doing this, is there a for next loop involved and is there a way not using the for next loop ?
View 15 RepliesI have five fields
1.CustomerID
2.BusinessID
3.OfferID
4.Day of Purchase
5.Month Of Purchase
Private Function MakeCouponCode(ByVal sn As Int16) As String
Dim a(16) As Char
Dim chk As Int16
Dim check, tDate, slNo, couponCode As String
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I am using the above code to make a CouponCode...but somehow its not very hard to crack...Any idea how can i make a bullet proof coupon code in not more than 16 digits?
I get the error Duplicate mapping to column 'CustomerID' in class 'xCustomers' in the following class, but i do not know what am i doing terribly wrong.
Public Class xCustomers
Inherits XPBaseObject
Public Sub New(ByVal session As Session)
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I don't know if I can do this here...but here goes. I want to generate a unique ID of fixed length The trouble is, the code example I found on the web is in C# (or C maybe) which I know nothing about. I tried a web-based C# to VB.net converter but the result doesn't work so its hard to understand what's going on (especially since I have not worked with bytes either this makes it more difficult).
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creating unique IDs for each row in a table, to avoid duplicates when inserting the data to a server. The table looks like this:
+--------------+----------+------+-------------+
| brikkenummer | tid | post | anvendt_tid |
+--------------+----------+------+-------------+
| 3086360 | 09:43:02 | 98 | 09:43:02 |
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"Brikkenummer" is the number of a device that each person carries with him/her, and "tid" is the time the runner has passed a specific post. The post he/her has passed is described in the column "post".Out of these three columns, is it possible to generate some kind of unique ID? The ID that is generated have to be the same if a row is displayed twice or more, to avoid duplicate entries.
I need to generate a globally unique ID of fixed 16-lengthThe GUID is too long for my purpose. So I wonder is there any way to convert it to a 16-length?If this is not possible, I have a program key of 8 chars, and is thinking of using the DateTime as my key.
View 4 RepliesI'm looking for a method of generating unique identifiers for a record class being created locally and then persisted in various formats (XML, SQL, etc.) I've seen people using DateTime and GetHashCode, but that seems to lend itself to duplicate identifiers depending upon the sample size. GUID is a bit overkill, as I don't need anything that unique (large) at the global level. I'm also aware of using GUIDs and GetHashCode to get the size down a bit, but duplicates tend to crop up here as well. Any best practice or method for generating simple unique identifiers?
View 3 RepliesThe program must generate 6 unique random numbers but when I click display numbers sometimes it gives me 6 unique numbers and sometimes I get duplicate numbers. I will add the code I have so far.
Public Class frmMain
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
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im making a program that will generate a number ever 1000mil seconds and when it hits 0 its makes a new time and starts again
i have 1000mil seconds set on a timer and i have this code
If Labelcount.Text >= 0 Then
Labelcount.Text = Random.Next(1, waitTextBox.Text)
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i have a few questions about generating random numbers:1) is it possible for the programme to generate a random number that it has previously generated (i.e could it produce the same number more than once?)2) can you specify what numbers to generate? e.g only whole numbers up to 1000?
View 4 RepliesI am working on an application, where I have already normalized the databases. Now I am creating an application in asp.net with vb.net as my code behind fine. These random numbers would be stored in the Id column. So, no way there would be repeating the keys. But my application could generate the key, which would probably get repeated. How would I check the database for, so that random numbers wont get repeated? is there any function? Could you give me the code for the same.
View 10 RepliesWhy does it give exactly the same numbers despite different variables? See below code:Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim MyRand1, MyRand2, Myrand3 As New Random
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is there a code for generating random letters and numbers?? like between 0 to 9 and A to F??
I used this code :
[Code]...
I just found this amazing DLL that can extract the hardware ID (computer RAM, hard drive unique serial number, partition serial number, CPU unique serial number, etc) of a computer.
However, there is no documentation for VB users and it is written in Pascal and assembly language. Ya, sad
connect to this DLL?The documentation says that the DLL exports the following functions:
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So I know how to an unique random number in a 1D array but In an 2D array looks so difficult or strange for me[code]...
Is their an other solution for an unique random number 2D array?
How long it would take to generate all of the numbers between 1 and X randomly.
X=1,000,000 took 6 seconds, and for 10,000,000 took over a minute.
Does that sound reasonable?
Experiment
stopwatch start
count = 0
do while count < x
select a random number between 1 and X inclusive
have i selected this number before?
no-add 1 to count
yes -
loop
stopwatch stop
display elapsed time
I made the Do Loop UI un-friendly and ran this from the IDE using CTRL-F5. My PC is 1.8Ghz and has 2GB of memory. I am using VB 2008, .Net 3.5 SP1.
Looking for work - Zip 65101 [URL]
So I made a program for generating prime numbers in a list box. My initial code had them listed like this:
2
3
5
7
..ect
Now I have them listed in pairs like this :
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I am trying to create an array of 5 random unique numbers between 1 and 30. I've been trying for a while and have had no luck.
View 9 RepliesFor my database I need to create unique numbers and insert them in the column "ID". Can I add them via a SQL query? The numbers would simply be 0001 to whatever.I'm using the "Show Table Data" gui.
View 7 RepliesSomething ive wondered about as long as ive had an interest in making apps is generating serial numbers for software projects.Im wondering how is this done by the pro's so that someone can put a key into an app and without being connected to the net it knows the key is valid by using an algorythm.Id like to make something like that for the sake of learning how. I realise more and more programs now "call home" at the point of entering a key or to "activate" as with MS office and windows etc, but id like to start at the old school way of doing it.Generating the alpha numeric keys and also checking them.
View 10 RepliesI am using Visual Basics 2008 Express edition. I want my program that I am making to generate a random amount of numbers and letters in this form when I click Button1.
WM9RX-GG6J2-4WKD9-FDJWM-TYH76
Is this possible?
I have a employee table In that I have two fields Id and emp name I have a second table in that i have four fields
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I am using vb.net2005 and ms sql server2005. I want source code for autogenerate the empid in my table. For example' sb1001'.
View 1 RepliesI have Single VB Class inside website project and I need to generate XML Documentation for this class. is there any tool that can generate this documentation?
View 1 RepliesI have a class called FileInfo. It has properties for stuff like FileNumber, Vessel, OpenedDate etc.
Now for a file I need to have Timesheets and Invoices.
My question is, do I create seperate classes for the Timesheets and Invoices?
I'm developing a small app to for a vehicle rental company. They require the app to print invoices for customers (fuel usage and etc) with charges. I was thinking of outputting row by row to a html (file) table and populating qty,amount,final amount etc programmatically. And letting the user view and print that html file.
View 3 RepliesI am using a Crystal Report in my application to display an Invoice. For this, I take the 'Invoice No' as input from the user. I was wondering if I could display multiple invoices on different pages of the report by taking 'From Invoice No' & 'To Invoice No' as input form the user.
View 6 RepliesI'm tring to retrieve a CustomerID in a string e.g. "12, Lucy, MyName" format "CustomerID, Forename, Surname"
So far I have
Dim String1, String2, String3 As String
Dim position As Integer
String1 = cbSurname.ToString
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How do I just get te Customer ID from this as String3?
I am using VB .Net to access the eBay API and store all completed orders in a database. This database is then fed into a proprietary shipping system, which can not handle an order number larger than 20 characters. eBay returns an order number like so 230407279314-680141236013 which is too long. The order number is always 12 numbers a hyphen and 12 more numbers. What I need to do, is turn this (the result can be alpha numerical) into a shorter, unique order key to store in my database alongside the true orderId (so that this can be referenced by the shipping software instead of the actual order number). The reason for the 20 character limit is the barcode algorithm used. Is there any way to achieve this in VB .Net 2010? This number can be anything unique, so long as it does not exist already (even a good uniqueid function would work, but I would have to query the database to make sure it isn't taken)
View 2 Replies