I need to search for a string in a text file. This string can change so I think I need to set a before and after string with the result being whatever is between. I've started by scrapeing the info from a Printers HTML page.
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This i what i have so far:
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First im using Visual basic 2008 express.
Heres what im trying to do. I want to search a text file for a word (say) then write only the lines containing that word into a textbox.
Heres what i got..
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Reader As New StreamReader("C:Program FilesActivisionCall of Duty 2main estgames_mp.log")
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I can retreive all items in my notepad but when I am adding them up in my listbox, and trying to print them in the console. I can only display two strings. I don't know why. My string is a combination of a name, space & score. ex: "luke 300". That is the pattern of all strings per line in my text file. I am separating the name and the score using space as the indicator. When ever a space is found, string before and after the space is retrieved and added to the listbox
Here is my
scorelist = New ArrayList
reader1 = My.Computer.FileSystem.OpenTextFileReader(My.Application.Info.DirectoryPath & "scores.txt")
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I have a text file which has two columns and each column is separated by a space (), the first column is a string and the second column is a numeric field.
What Im trying is to read the numeric field in textbox1 and match it to every numeric field in column2 and if the number in textbox1 is not greater than the field then to copy that row (column1 and column 2) into another textfile.[code]...
I want to search for a substring in a textfile and delete this substring. How can this be done?
View 2 RepliesI have a list of strings. For each string in that list, I want to prepend another string. I wrote a method to do it, but I was wondering if there was something already in .NET I could use to do this. It seems like something that could be built in, but I was not able to find anything.
Here is the method I wrote:
Private Function PrependToAllInList(ByRef inputList As List(Of String), ByRef prependString As String) As List(Of String)
Dim returnList As List(Of String) = New List(Of String)
For Each inputString As String In inputList
returnList.Add(String.Format("{0}{1}", prependString, inputString))
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It works, but I would rather use built in functions whenever possible.
I have this in my btnSearch to search for the selected item in the datagridview:
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I want to search a string (which contains html source of webpage)and get all text that strinh holds, like:
TC83886783380753647814458
TC27072318654272127623234
...
so, i want to find all text that is located in code between "serviceid=" and "&" (example how it would look in html source/in string: serviceid=TC27072318654272127623234&)
so the result would be only text in that format (starting with TC and 23 numbers following it)
I think i could do it by parsing a string somehow
I have a textbox which has about 120 lines of text but this can vary. I want to search for an array of words, like Boeing, Airbus, Saab etc there might be 3 options there might be 5 options in this array that i'm looking for. My question is how can I search the textbox and highlight all these words? Similar to (Control + F) in IE8. I've looked at InStr but am unsure if this is what I'm after as it does not seem to work for me.
View 4 RepliesI want to get a string from the richtextbox but here how it goes in programming for example i want to get all class/function and variable names in this given code.
Quote:
Private Function Processstring(ByVal strin As String) As String
Dim astrWords As String() = New String() {"parrot"}
Dim strOut As String = strin
Dim strWord As String
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how would i get the "processstring" by getting it after the word function?
I am working on a UDP Client/Server, and currently i have them sending back and forth strings, which i convert to bytes, and then open the bytes to read. I want to now send an Object instead of those strings, which includes multiple unsigned integers and strings.
View 39 RepliesQuite simple but I'm having the hardest times trying to write something that'll do what I want. I have 1 listbox with 3 pre-defined strings each in their own index. I'm trying to search through a textbox to see if any of the strings in my listbox were found. So far I have no compatible code so I seek help from the professionals.
View 5 RepliesI have a richtextbox with a large file inside....I want to be able to search for "Fornication" within the text (KJV Bible) and have every instance of that word to pop up into another richtextbox along with the scripture it is in.
View 1 RepliesI've got a form which loads all the files from a selected directory into a list box, a user then enters a string into a textbox and then loops though all items in my listbox, there is a match it adds it to another list box - this is a simple method of search for all documents. I can only seacrh for perfect matching strings right now.
View 12 RepliesI have a multiline string that is called password (as you can see in the code below) that i want to save to a text file:
Dim
password As
String
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I have not had much time to go threw my code properly as this is some urgency. I need to remove line 1 from a textfile if it contains a string but its not working.I have 500 files and not going to do this manually.
Code:
Private Sub btnRemove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRemove.Click
If String.IsNullOrEmpty(txtDirectory.Text) Then
OpenFolderDialogDirectory()
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I also feel the function is very pointless sime i am opening the file twice.
I'm migrating from VB6 to VB.NET, in hence my questions below:
I have to write a function that returns array of strings.
How can I initiate it to empty array? I need it since I have to check if it's empty array after it returns from this function.
Is list of arrays better for this purpose? If I use a list - Is it empty when it firstly defined? How can I check it it's empty?
I'm developing an app for WP7 and Win7 that will get info extracted directly from particular websites. The app will download the HTML source and parse through it to find the required strings. The strings may not have tags. note multiple instances of the string needs to be found. I've tried a few very rudimentary ways, and although they work, they are extremely slow.
View 4 RepliesSay I have a List(Of Tag) with Tag being an object. One member of Tag, Tag.Description, is a string, and I want to make a comma-separated concatenation of the Description members.Is there an easier way to do this than to read the Description members into a List(Of String) and then use the Join function?
View 2 RepliesI am trying to create a textfile and write some lines into the textfile. However, the code that i am using can only write when the textfile is already created in the directory.
For this case, can i actually allow my script to search if a textfile is being created, if not create a textfile ???
Dim pathdir As String = "C:workingdir est.txt"
If System.IO.File.Exists(pathdir) = True Then
Dim objWriter As New StreamWriter(pathdir)
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How would one remove an item from a ListBox and then remove that line from the TextFile and repopulate the ListBox with new data in Visual Basic.Net?[cod]...
View 2 RepliesI have a large piece of text in which there is something simular to this:!#_KT_#!COMMANDHERE!#_KT_#!I want, in VB.Net, to get the 'COMMANDHERE' part of the string, how would I go about doing this? I have this so far:
Dim temp As String = WebBrowser1.Document.Body.ToString
Dim startIndex As Integer = temp.IndexOf("!#__KT__#!") + 1
Dim endIndex As Integer = temp.IndexOf("!#__KT__#!", startIndex)
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I have a program where you have three entries, CD name, artist, price and it goes into a listbox and .txt file when closing. I have to have a message box if you enter the same CD name. I have a code to open the .txt file and compare strings but I need to change it to compare only the CD name and not all three entries. Is there a way to do my string compare against my listbox without opening the .txt file?? The program loads the listbox from the .txt file when opening. Private Sub btnAdd_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAdd.Click' adds CD information to the list box
' declare variables
Dim strName As String
Dim strArtist As String
Dim strPrice As String
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I have a TextBox for the user to input a search string. My button click code returns thr error 'No value given for one or more Parameters. I have tried various ways to write a SELECT string.
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how can I search a textbox for a string within a string and if certain word (string) found enable a timer?
View 3 RepliesI 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?
View 6 RepliesI'm working on a program for a class of mine but the ideas of arrays from a textfile just doesn't seem to click.
When the program loads, it should display the title of 17 books from the textfile.After, the user should be able to click a book title in the ListBox then click Compute Inventory to display the information below, which should be obtained from the textfile.
I would like to save a big textfile in the same format . I mean when I open it on a richtextbox and save it , the text loose is space .Exemple:
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I am trying to take one string that is too long for it's container, so it wraps, and break the string at the wrap into two strings. So say I have this string
"this is a
string"
I would like to make this into: "this is a" - "string", two different strings. But I will not know where the break is..