i am serching for the random code for database the name of the table "q"
the fields
qu = label "the qustion"
an1 = button " answar 1 "
an2 = button " answar 2 "
an3 = button " answar 3 "
an4 = button " answar 4 "
[Code]...
I am trying to make a texas hold em game and it is of the utmost importance that my code generate a random number. But using a random number function that I always end up with a lot of the same numbers over and over again. Any ideas on how to make it "TRULY" random? [code]
View 3 RepliesI'm trying to write code to generate a random code for a textbox. It has to contain both numbers and alphabets. This is what I have so far
Function HomeIDCode(ByRef random As Random) As Random
Dim strValue As String
Dim strAlpha As String
[code]....
I want to create a Random number between 1 & 249 (including both numbers).The only Book I have MS Visual Basic 2500 Step by Step (by Michael Halvorson) gives codes as follows to display the result in a Label:label1.Text = CStr (Int(Rnd() * 10)) This is to get a random number between 0 & 9.
View 3 RepliesI have written a code to generate random colors and the code is working perfectly fine.I have a requirement in which I should not generate Red or Shades of Red in Random Color function. suggestion on how to not generate Red and its shades
View 7 RepliesI was before knew how to code that it will give me a random number! Also i know it was 2 ways i could make it. A range from like 0 to 100 if i want that. And then it draws a random number from that! And i knew another there i could type in the numbers and it draws a random from there.
View 3 RepliesI'm about to make verification code to my app it would be built out of random characters and numbers,i have no problem making a custom one,but before i go and do it i just wanted to ask if there is built in method of such thing .NET environment
View 3 RepliesDim strFilename As String strFilename = Format(Now, "ddmmyyyyhhmmss"
That generates the day number month and so on. But i want to generate a string with "VB Code Snippet" then after that just any 5 letters or numbers so it might generate "VB Code Snippet 7ef82"
Depending on a specific string, how would I retrieve a random color-code?
View 4 Repliesthe error code points to a Stack-Overflow I can not pin the offending code down because the software works faultlessly on some computers after deployment but on others the crash occurs when a Gantt chart gets redrawn after changing activity dates. All the computers are situated on the same LAN and connect to the same SQL server 2008 database.The application has been developed with Visual Studio 2008.
I used the same install disk on all the computers and they are all using the same date/time format. The crashes occur on both 32 - and 64 bit machines.
The error message:
Stopped working
Problem signature:
Problem Event Name: APPCRASH
Application Name: Pfisterer Project Manager.exe
[code]....
I'm wanting to add a random number into a database but before I do this I want to check to see if I alreay have this number in there, How can I do a search to return a true or false I guess answer to if the value is in my access database?
View 22 RepliesI have created a small sql database using new data source. i have placed buttons to move to next,previous,first and last row but i am wondering if there is a way of making a button which would randomly pick a row with information from database or just make it randomize them before they are appearing on the screen.
At first i have tried creating random number generator and then joining it with the coulmns in the database. I failed in the end even though i thought it was going to work. Then i thought maybe i have to change the query as in, instead of "Select that and that and that from database" i thought i have to write "Select that and that from database sort by rand", i also saw that some people write limit 1 or more afterwards but i have no clue what it is and didnt use it. Anyhow i tried that query and it didnt work.
EDIT: I also thought about adding all questions into array, or use some sort of indexing, but i have to use database as the requirement.
Also if anyone would be willing to give me an advise of what is best book i could buy, which would cover databases in sql and some beginner/intermediate programming in visual basic.
As in today i click on the button it will display the item when i hit again the button it will still display the same item and last for the whole. On the second day, i hit the button again it will display other items and last for thewhole day again.
[Code]...
I just want to select 1 random record from my database for example in my table1 i have a,b,c,d,e,f,g then everytime i click the button in my program it will output randomly between a to g then i can add another record from my database and if I make it a to x it will randomly choose between a to x, the random doesnt have any conditions.
Right now i've found some codes that will be very useful but i cant modify it so it will be connected to my database.
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim DT1 As New DataTable
DT1.Columns.Add("SN1")
DT1.Columns.Add("NAME1")
[Code]...
i have an sql database in my application and everything is working fine apart from one aspect.My random row picker code is located in one button on_click event. Is there a way of passing it over to other subs/on_click events?
[Code]...
I am trying to generate random images from access database using hashset as it is said to be unique and there won't be any repeated images appearing. But, it doesn't seem to work.
How can i get it to work? By the way, i am very new to the concept of hashset.
Private Function GetImageFromByteArray(ByVal picData As Byte()) As Image
If picData Is Nothing Then
Return Nothing
End If
' is this is an embedded object?
Dim bmData As Integer = If((picData(0) = 21 AndAlso picData(1) = 28), 78, 0)
' load the picture
Dim img As Image = Nothing
Try
Dim ms As New MemoryStream(picData, bmData, picData.Length - bmData)
img = Image.FromStream(ms)
Catch
End Try
' return what we got
Return img
End Function
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Panel1.Visible = False
Panel2.Hide()
Dim conn As New OleDbConnection
Dim DA As OleDbDataAdapter
Dim DS As New DataSet
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=db1.mdb;User Id=admin;Password=;"
DA = New OleDbDataAdapter("Select Empty, EmptyName, Target, TargetName from PicturesDisplayed", conn)
DA.Fill(DS)
Me.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage
Dim oledbconnection As OleDbConnection
oledbconnection = New System.Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsAdministratorDesktopdb1.mdb;Jet OLEDB:System Database=system.mdw;")
oledbconnection.Open()
Dim command As OleDbCommand
command = New OleDbCommand("select count (*) from PicturesDisplayed", oledbconnection)
Dim count As Integer
count = command.ExecuteScalar()
oledbconnection.Close()
Dim randomImage As New HashSet(Of Integer)
' Create a integer and new Random object
Dim intPic As Integer
Dim rand As New Random
'Pick a random number between 0 and the number of images in database
intPic = rand.Next(0, count)
randomImage.Add(intPic)
PictureBox1.Height = 256
PictureBox1.Width = 256
PictureBox2.Height = 256
PictureBox2.Width = 256
Dim pic1x As Integer = _
(Me.ClientSize.Width - PictureBox1.Width) 2
Dim pic1y As Integer = _
(Me.ClientSize.Height - PictureBox1.Height) 2
PictureBox1.Location = New Point(pic1x, pic1y)
Dim pic2x As Integer = _
(Me.ClientSize.Width - PictureBox2.Width) 2
Dim pic2y As Integer = _
(Me.ClientSize.Height - PictureBox2.Height) 2
PictureBox2.Location = New Point(pic2x, pic2y)
' Now set the picturebox image equal to the image chosen from the array randomly using the random
PictureBox1.Image = GetImageFromByteArray(DS.Tables(0).Rows.Item(intPic).Item(0))
PictureBox1.Visible = True
PictureBox2.Image = GetImageFromByteArray(DS.Tables(0).Rows.Item(intPic).Item(2))
PictureBox2.Visible = False
If (randomImage.Count = count) Then
Me.Close()
End If
End Sub
I'm wanting to alter a column in an acces database, to a Random AutoNumber I know how to do it for incremental e.g."ALTER TABLE MyField Counter(1,1)"but how do you do it for a Random Autonumber??
View 10 RepliesSo in my program I have a database where I send info such as passwords, is there any way to (in an easy way) encrypt the password before sending it so instead of sending "mypassword" to the database I send a random collection of letters and numbers like "shH3n2ja"? I only need two functions, encryptPassword, decryptPassword.
View 7 Repliesi have this database format in SQL:
ID name add num
1 fel mn 201
2 john kaye 23
3 Kate mani 25
I used databinding to call the values on (SQL) to textboxes in visual studio 2010 and i have this code in NEXT command:
Inter is the name of the databinding
With inter1
If .Position = .Count - 1 Then
[code]....
The code above display the information not on Random. How can i display those information in Random mode? And i need a msgbox when all the data has been already seen by the user. I mean no redundant data will be seen by the user upon random mode has been done.
I've read numerous posts and threads about random number generation, but I havent' run across this.If I generate a bunch of random numbers, the results are radically different if I create a new Random generator for each number than if I use on Random generator for all the numbers. The results are much more consistent and evenly distributed if I use the same Random generator.I would have thought the opposite,because creating a new Random generator each time should reduce the number of random repetitions, if a different time slice is used to create the random number.[code]......
View 9 RepliesThe class Random is out right defective. It always produces the same random numbers in the same sequence. Things I have tried so far is every kind of seed you can think of as well as Randomize. The result is that I always get the same random numbers in exactly the same sequence.
View 4 RepliesI am practicing using the drawing commands, and have gotten a grass background and black happy face that moves around the background.It's a 10x10 grid of 50 pixels.I want (at the moment, when i press enter) it to generate a random number of trees (15 ~ 25) at random locations on the background. The program doesn't freak out about anything, and the variables seem to be right (using stop commands) but it's not drawing anything. Here is the code for the "GenerateTrees" command I have for when I press enter.
Private Sub GenerateTrees()
NumberOfTrees = Int(Rnd() * 10) + 15
For i = 0 To NumberOfTrees - 1
bmap.MakeTransparent(Color.Fuchsia)
[code].....
I would like to use integers generated by Random.org in a small desktop widow app. Im using visual basic. All My search terms bring up unrelated (to My issue) information. Currently I am using the local random statement/command.
View 4 RepliesI've made an image viewer which opens a random image from a specified folder, but the random number is not that random at all... I've already used Randomize(), but without result.
View 3 RepliesI have a report made in Crystal Reports XI. The report is generated and exported to PDF in visual basic script using COM interface. Generally everything is running smoothly, but in one case generation breaks with error: Failed to retrieve data from the database. Details: [Database Vendor Code 9421]
Database used is MSSQL 2005 connected over ODBC to CR XI. When I am opening report with exactly the same parameters in Designer, everything works fine.It looks like it is data related, but it is hard to trace since the whole report is pretty sophisticated. Anyway I spent half a day on crawling over Dr. Google and it seems that he has no clue what might be an issue.
I did the following
Imports System.Data
Imports System.data.OleDb
Public Class Form1
Dim con As OleDb[code].....
By this i can fetch only one row(the last row) of the access....how to modify the above code to fetch all the rows starting from the begining from the database..........
I wish to know of softwar for store good vb.net code so can use again and no write again all time.
View 1 RepliesI have a database that has two tables in it. One is a table of items (table1) and the other is the table of current items (table2).On form load I need to generate a random amount of the items from table1 and populate table2 with them. I was trying to do something like this:
[Code]...
I don't take programming lessons at school or anything, and I'm starting to (try to) teach myself about random things.Currently I'm making an app that has 3 functions:
-Random Integer (1 to 100)
-Random Answer (Yes or No, similar to a coin flip)
-Random Dice Roll (1 to 6)
How would I go about doing this?At the moment all I know about random numbers etc. is that I will need to do something along the lines of Dim dice As New Random or something like that, but, like I mentioned, I have no idea.I am well aware of the DIC rules that you won't write the code for me/do my "homework(?)" for me, and that's not what I'm asking.
VS2010 (SP1) / .NET 4 on Windows XP. The question is simple, the answer; not so much. When generating a salt, should the LENGTH of the salt be random, fixed or a random number within a (min/max) range? I am using RNGCryptoServiceProvider to generate the salt, just unsure of the length of the salt.
View 12 Replies