I am trying to write a program which performs a binary search. The user will input the name of a state in a textbox.I have a listbox which is populated with the 50 states in ABC order.The middle of the list must be determined and then determine which half of the list the state may be located. If the middle item is less than the state name the state should be in the second half of the list. If it's greater than the state name is should be in the first half of the list. The calculation for looking at the middle itemi the list is:
middle = CInt(first + last)/2)
There is a variable 'flag' which is initially set to false and then will be set to true if the state name is found. The variable first is initially set to 0 and last needs to be set to one less than the number of items in the list.Below is a very rough program fragment.
Code:
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim i As Integer
Dim flag As Boolean = False
Dim first As Double = 0
We need to show the value entered and the number that it is compared to in the textbox and concatenated to the binary array. This is the code that I have so far: Public Class Tester Shared array1 As Integer() = New Integer(14) {} Dim count As Integer Public Sub Main() Dim i As Integer [Code] .....
I'm creating a search function to search through a binary file and find a record based on the users input. Surprisingly, that isn't the problem! The problem I'm having is that as part of this I'm using a procedure to display results in text boxes, and I'm getting the error "Too many arguments to private sub display customer"I've encountered this error before, but never really knew what it was... Here is my code.
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click FilenameCust = "F:\College\CustomersFile.bin"
I am trying to search the 4 columns of my array by using this click event. The column is determined by a radio button as you can see. I changed my code from last time and now it works, but only for the first column. If i try to search out a string in the second or third columns I get an error based on the line highlighted in blue HTML accutally shows and it is green. the error says Index was outside bounds of array
Like i said It works fine for all values in the first column, accually the second (Numbered 1). If i enter a value in the partsnumBox and it is found in the the 2nd 3rd and 4th columns I want the value in the first column (0) of the same row.
Private Sub FindButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles FindButton.Click 'Define Array Dim PartsArray(,) As String = {{"PR214", "MR43T", "RBL8", "14K22"}, {"PR223", "R43", "RJ6", "14K24"},
I need to compare two tree-structured reports and show comparison results in a datagridview in vb.net. I think using tree structure should be efficient. But note that I DO NOT use a tree view to display results (I found a lot of help in tree view though). All I want to do is to construct two trees, and then search the trees and compare. I do not know how to write this in vb.net.
Im currently using the streamreader/writer method for writing to a text file im considering implementing a binary search to increase the efficiency of searching through records.
Qus: Does binary search require the text file to be a binary file?Do I need to do binary reader/writer instead of streamreader/writer And are there any tutorials regarding binary operations in vb 2010 this is my first attempt at coding binary operations and have no idea where to start
I have a delete method for a binary search tree. It only deletes the last two entered values. When trying to delete the root or anything to left of it it returns a null pointer exception.
PublicFunction Delete(ByVal key AsInteger) AsBoolean Dim current AsNode = root Dim parent AsNode = root Dim isLeftChild AsBoolean = True While (current.value <> key) parent = current If (key < current.value) Then isLeftChild = True current = current.rightNode Else
Anyone knows where I can download binary search tree for VB.Net ? I'm working on a small project for my company and I'm thinking of using BST as a sorting tool.I used to do BST using C++ and I was using linked list. I'm not sure if that can be done in VB.Net but is there any other ways? any input and comments are welcome.
I have an array of words that must be sorted alpabetically using selection sort, I must then be able to search the array with a binary search. I just can't get my head around how you would go about doing it. I know that the words must be first sorted into alphabetical order. Here is the code for selection sort with numbers:
Dim pass As Integer Dim count As Integer Dim minmax As Integer Dim temp As Integer
I have some .doc binary files stored in my database and i would like to now search them all (without converting them to .doc) to see which one contains the word "hello" for instance.
Is there any way to do this search in the binary file?
I have a delete method for a binary search tree that only deletes the last two values that were entered in, and when it tries to delete anything to the left of the root or even the root itself it returns a null pointer exception.
Public Function Delete(ByVal key As Integer) As Boolean Dim current As Node = root Dim parent As Node = root Dim isLeftChild As Boolean = True
Couldn't think of a better title.(Background on the problem/me)Okay, so, first question/post here, so hi. Now that that's done with, the information pertinent to my problem. I'm fairly new to VB (and programming as well, aside from screwing around with C++ and learning assembler(well, attempting is the better word) god knows how many years ago), and have only seriously been programming for about under half a year, and my skill level is about at that stage. Only been using VB.Net, nothing older. Depending on the time of day and if I'm home or at school, I fluxuate between VB express and Vis Studio 08. Umm, this program I'm having trouble with was on a test that I took yesterday (took the problem home with me cause I really wanted to figure out what was wrong with it).
The stipulations of the test were: No For->Each Loops No using Built-In Sorting or Searching Functions
Row3 ;W910 RF350022 ;Increase backlight by 100% ;(c) spring ;(p) spaceman +1000000 F5 000000 5555 44 555555 904938291 8676859 00
Row4 (Duplicate of Row3) ;W910 RF350022 ;Increase backlight by 100% ;(c) spring ;(p) spaceman +1000000 F5 000000 5555 44 555555 904938291 8676859 00
if label1 = RF350022 label2 = Increase label3 = spring label4 = 100%
only if it contains all of these words it should return the first instance (row3) then end or null the rest (row4).how can i get row 3 to show in message box now it has been found?
I have to search within an array and display the number of occurrences that a value within the array appears. I know that my code is incorrect but this is what I have so far. If anyone can point out what I am doing wrong that would be great.
Private Sub btnResult_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnResult.Click Dim intSearchAmount As Integer Dim intCounter As Integer Dim intIndex As Integer
Some binary files have application variables at the end if you open it with a text editor you can see these variables. Now when I read these files into the processor memory the program does not work properly, however if I read a file without this it works fine. So how can I read a byte[] array to EOF so that when I pass that byte array into win32 api create-process it will create the process without corrupting the program?
I'm trying to wrap up a program I wrote in VB.NET and quick. I have a device that I am connected to through a serial port (COM4). It sent me 1056 binary bytes which I have stored in an array called newRecievedData. (see code below)
********** Start Code********* Dim numberOfBytesToRead As Integer numberOfBytesToRead = myComPort.BytesToRead Dim newRecievedData(numberOfBytesToRead - 1) As Byte
I'm trying to save binary data ( convert from image) to byte array in mifare card with acr 120 reader. image : 687 byte mifare : 1 k My problem its can't save but I am trying to save char data its work.
I have an image that has dimension of (100,100). I am using FileStream class. When I run the code I get EndOfStreamException error at line 44. I have pasted the for loop section of the code below.
For x = 0 To 99 For y = 0 To 99 byteRead1(x, y) = br1.ReadByte ' line 44 (exception thrown here)
I need to create a collection of millions of objects, each object has 3 double and one integer fields.If I remember (after more than 20 years without using C) in C you would allocate enough memory using a struct and an array, and read all the file content in one shot.In VB I created a class with the 4 members, and this constructor:
Sub New(BR As IO.BinaryReader) X = BR.ReadDouble Y = BR.ReadDouble
I am working with binary files that have 500 rows and 500 columns (width x height). When I load these files into array I set width and height variables to 500 and I was wondering instead of hard-coding like that how I can code in a way that the program should find the # of rows and # of columns of the file before loading the file into array...
I have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file Dim bw As New BinaryWriter(fStream) System.Threading.Thread.Sleep(1500) ComTd.Read(data, 1, bCount)
