Search For A Value In A String?
Nov 28, 2011
I am trying to perform an action if the index of a string contains a certain value, but it's just not working quite right and I could use a hint if anyone has done this before.The application pulls in a .txt file and manipulates it to create 3 other different type of files. It is currently set to pull the information from line 3, but the output program that supplies the file will probably change to line 2 or 3. I need to either search the whole string or the index of line 2 and 3 and then do the following manipulations. It will not return the value of line 2. This is what I have tried, but is not working. The code commented out at the bottom is what is currently there.
The .txt file shows the following values so far:
1 PAGE 1
PIPELINE REF RA10-FX-604-01-
[code].....
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Mar 20, 2010
how can I search a textbox for a string within a string and if certain word (string) found enable a timer?
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May 5, 2012
I have written a program that uses an array of the english alphabet and Morse code. I also built a form with a input box for the alphabetic information and an output box with the Morse Code. What i am trying to do is basically type a word like "Hi" in the input box and produce the Morse Code equivalent in the Morse Code output box. [Code] This works but only one letter at a time. Do i need to Parse the string of characters one at a time, and then run it through a loop like i have created?
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Apr 27, 2011
I have a non standard text file, ie its not delimted etc, its pretty much free flowing. What I want to do is to search for a specifc string eg. "xyz123" and then replace it with what a user types into a text box, lets call the text box and its contents "txtreplace".
I am trying to replicate a find and replace function essentially, but will need to tailor it later on down the line, but this will be a starting point.
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Nov 18, 2009
I'm looking for a way to search a string variable for two words and copy the text in between them into another variable. This needs to be done as many times as the match occurs.
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Oct 11, 2010
i need a vb8 code to open a txt file,search for a string in it & extract string in a excel file.
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Jan 28, 2010
Need to take a string in vb and split it. Also need to look through the two returned values and return the value which contains [URL]. Pipelines are the delimiter.
txtEmailFrom.Text = "john@huno.com|james@domain1.com"
Dim brokened() As String
brokened = Split(txtEmailFrom.Text, "|")
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Nov 20, 2010
Recently I have started my computing course at college. I had little programming knowledge (as I'm more of a 'web developer') and it has come to the point of us learning some of the basics.I downloaded VB at home, and have been learning by myself when I have the chance... but I've hit a wall Basically, I have to create a program that searches for a character within a string.I managed to do this at college, but it has slipped my mind... So I could use some help The specification we have to meet is:An event (such as a button being clicked) must use a function to return something.The function must use the mid() function
From this, I've come up with:
Public Class Form1
Dim string1, searchterm As String
[code].....
The layout of my program is effectively 2 text boxes (named input1 & searchterm), a Label (named Output1) and a button (named search).ow, My problem (I think) is due to the mid().I'm not entirely sure I've used it correctly.
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Mar 11, 2010
I need to search all cells inside a dataviewgrid in VB.net starting with "www" , once i found one cell apply a background color to the complete row and get the next cell with the same String.[code]...
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Dec 5, 2009
im trying to search for a word in a string, when i find that word i want to enter into my if statement based upon dim position = 1
im aware that postion is 0 by default and -1 when the word is not there and 1 when its there.
'find covers and back drop
Sub findfiles()
Dim file_names As ReadOnlyCollection(Of String)
[Code].....
i get alist of directories and store them in an array. I step through the array (i) while search the string for the correct word.
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Aug 27, 2009
I'm working in a program that reads sms from phone I have messages like "You have successfully transferred 100.00 EGP to 20119845844Balance 7555.00Transaction: 4620439" Stord in a string So I need to search the message for the numbers 100.00 , 20119845844 , 7555.0 and 4620439 and it's sure changed every message so the how to search for this Numbers and add every one in variable to use every number of them alone?
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Nov 17, 2008
I know this has been answered before but I am having trouble with it still. I am trying to find if a textbox has an "x" as the first character. I am trying to use the left(string, 1) command as described in a couple other threads to just test the first character on the left but the only left function I can find relates to the left coordinates of the textbox.
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Jul 6, 2010
Is there a way to search for a string pattern in a string ?
i have 1000 of strings and example of one is - 'won 2 races in town, 1998, and then moved to'i wish to search for the ", ####," as all the strings are in the same format (note that the year is different every time hence why not using the instr)
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Oct 15, 2011
I was wondering how would i make a search kind of thing, for example if string1 contains all the words in string2 words. like a search(not just if string1 contains string 2).
it should work something like this:
If string1 is "an apple" and if string2 is "djsjfsfg apple sdfsfssdfs" then string3 would be nothing
BUT
If string1 is "an apple" and if string2 is "djsjfsfg apple sdfsfssdfs an ashdfjdsgfsdgfj" then string3 would be "djsjfsfg apple sdfsfssdfs an ashdfjdsgfsdgfj"
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Oct 28, 2009
lot_no = "lot123" s.indexof("lot123") does not return zero whereas s.indexof(lot_no) returns zero has anyone seen a problem like this? what does s contain? For Each s As String In split1
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Mar 14, 2010
I'm working on an application that will look through an XML file and match strings. However, some of the text in the XML that I'm searching is Cut with an *. I'm trying to search through model numbers, and say I'm searching "RGI6400GB", and the entry in the XML is "RGI6*". Is there any way to search if there's an * in the text and have it able to search like that? Some also have the ending of the model, like so; "*GB".
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Jun 10, 2010
I have an ArrayList, and i wish to search it for a specific part of a string. Like the InStr() function.I can only find the WHOLE string. The ArrayList has strings like "This=Is A String", so if i do a check with ArrayList.Contains. It will only search for the whole string, and not something IN the string. Perhaps i need something like Starts With .
Code:
dim wordArr as New ArrayList
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If wordArr.Contains(TextBox1.Text) Then
[code]....
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Dec 13, 2010
I was wondrening if there is any built in functions to search for a sequence in a string
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May 15, 2009
I have a VB .NET String. How can I search that string for a character string and replace it with another string?
For example:
Dim rValue As
String = sproc.ExecuteScalar()
' rValue now has the XML string <indracio fire height=23, width - 6>
/* This is the string that I want to search. Replace the words "indracio fire" with the word "lucion time"
How can I search this string for the words "indracio fire" , and replace with the word "lucion time" ?
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Aug 29, 2011
How on specific behaviour can be created in a custom class. I want to be able to create a custom class (a kind of list) where I can access the items by their index (this is the easy part), but also by a string that would describe them. Here is an example:
MyClass(1).SomeProperty = "NewValue"
MyClass("Item1").SomeProperty = "NewValue"
You can see this kind of behaviour in dataset for example where you can select a table by its name or by its index like this :
DataSet.Tables("MyTable").Rows...
DataSet.Tables(1).Rows...
How can I create a custom class that will behave like this?
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Dec 6, 2010
This i what i have so far:
[Code]....
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Nov 6, 2011
I have searched for a simple way to search a string array. MS gives a clean simple solution for a one dimesion string.
Dim StrArray() As String = {"ABCDEFG", "HIJKLMNOP"}
Dim FindThisString As String = "JKL"
For Each Str As String In StrArray
[code]......
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Sep 25, 2009
I need to search a buffer for a string of characters.The buffer is essentially a binary file (it's an image) and contains lots of chr(0) characters.The string I need to locate also contains chr(0) characters. In fact it is the following string:
chr(100) & chr(0) & chr(0) & chr(163)
This is a marker in the image file for items I need to process.So I though I would do the following:
Dim sFileBuffer as String = system.io.file.readalltext("myimagefile")
Dim sLookFor as String = chr(100) & chr(0) & chr(0) & chr(163)
Dim iLocation as Integer = sFileBuffer.IndexOf(sLookFor)
The problem is that, although the characters in sLookFor definitely exist inside of sFileBuffer - IndexOf will always return -1 (not found).I tried the following:
Dim Marker() as Byte = {100, 0, 0 , 163}
Dim sLookFor as String = System.Text.Encoding.UTF8.GetString(Marker)
Dim sFileBuffer as String = system.io.file.readalltext("myimagefile", Encoding.UTF8)
Dim iLocation as Integer = sFileBuffer.IndexOf(sLookFor)
But this appears to only find occurrences of Chr(100) & Chr(0) - not the full 4 character sequence I desire. It appears to see the second Chr(0) as a termination of the search string.I think the sticking point here is the null. Yes - I can string.replace(chr(0), Chr(255)) in both the sLookFor and the sFileBuffer and adjust my search accordingly - but that seems like a mess to me.Is there not a way to search a buffer of binary data? I've tried working with byte arrays - but there appears to be no way to easily search for a sequence of byte values - just individual elements in the array.
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Mar 31, 2007
I am using Visual Basic 2005 Express Edition I have to find a string in record of a ListBox; the string is in fixed place on the record. I wrote this code and this code working ok:
[Code]...
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May 22, 2011
How to search and get position a string in a big file?I have searched in forum2 and get several ways to search for strings in files, but it is not for large files above 500 mb,I have just been make a function to search string and get its index,but it is very slow and uses lots of RAM.This is my function
Function StringInFile(ByRef fs As FileStream, ByRef
substring As String, Optional ByVal occurence As Integer = 1,_
Optional ByVal start As Integer = 0, Optional ByVal count As Integer = -1) As Integer
[code]....
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Nov 6, 2010
Given an enum similar to this:
Friend Enum TestValue As Int32
tstNotSet = -1
tstA = 0
[code]....
As noted in my comment to Jon Skeet, this construct, along with the rest of the Object's components, executes 100,000 times in a profiling loop in ~570ms (rough average of 3-5 runs).
Exchanging the above construct out with a smaller Array.IndexOf construct loops 100,000 times in ~630ms (again, 3-5 runs, rough average, the whole Object). The new construct looks like this:
Dim p As Int32
p = Array.IndexOf(TestValues, s)
If p <> tstNotSet Then
[Code]....
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Jun 14, 2010
i am building a web crawler.i need to be able to get emails from some local html files
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Nov 4, 2009
I have a single text file and I need to search the file for any instance of the
string (Product_Type: "Hardware", "xxx", "xxx") the Product_Type is constant and has several instances within the file but the "Hardware" changes. I need to show all the values inside the quotes of the "Hardware" string to a listbox.
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Jan 24, 2009
How would you go about searching a webbrowser for a line containing a string? Here is my code so far:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim url As String
WebBrowser1.Navigate(txt_url.text)
[Code] .....
In this code, I would like to search for the first instance of "RichTextBox.AppendText" and put that into a string. I have also found when browsing in the webbrowser if you can across a download, and you just want to download it to a default directory without the open, save, cancel dialog box coming up. How would you go about doing this, if it is possible?
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Jun 18, 2011
I've used an OleDbAdapter to connect to a MS Access database with about 17 fields. I want to be able to search between 1 and all 17 fields for return(s). I have been able to search 3 fields so far (so all 17 will not be a problem), but all 3 fields must be completed or an error occurs (FileNotFoundException was unhandled).[code]...
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