I have a large file (typically more than 1GB) with following format[code]...
My question: Is there a simple way to trim the header information without have to read the content part and save to disk again? I mean I just need to modifying the existing file and delete the header part.
I'm writing a simple application in vb.net and need to output some information to a log file for diagnostic purposes.In order to ensure that the log file doesn't get too big, I need to trim it to a certain number of lines (say 5000). For performance reasons, the trimming doesn't have to occur each time a log entry is written out nor is it critical that trimming occurs (for example, if the application crashes prematurely).
However I'm not really sure the best way to trim it. Loading the entire log into memory and then re-writing only the last 5000 lines back out would work, but I'm sure there is a cleaner and better way to do this.
I am trying to trim the path from a filename. With the following code, it returns "My Documents" where I should be getting "Test.txt". if I change the 1 to a 4 I get what I'm looking for, but that's not going to work if I'm working with a file deeper into subdirectories.I need it to display the name of the file regardless of location or file type. Any ideas?
Private Sub trimname()
Dim filelabel
split = current.Split("\")
[code]....
I have a text file that has multiple blank lines and Im trying to return all the lines between two of them specifically
so if I have a file that looks like this:
[Code].....
I would like to grab lines 8-13. Unfortunately, it might not always be 8-13 as it could be 9-20 or 7-8, but it will however always be between the 2nd and 3rd line break.
I know how to trim characters and pull out singular lines, but I have no idea how to trim entire sections.
how to apply the correct syntax to read the text file which is in C drive
I just wondering how to apply on it in my coding.
Here is sample text files i would like to create the program to read the text files content:
Example:
0x0C03C6ED Wed, 27 Jul 2011 00:33:18
0x0C038E28 Wed, 27 Jul 2011 00:36:29
0x0C039289 Wed, 27 Jul 2011 00:39:51
[Code].....
I want to know if there is a way to trim and audio.For example, I load in a song that is 3mins in length. I only want 1min 10s part to 2min 30s portion of the song and then save it as, let's say a WAV file.
Is there any API that I could look into to do this?
I am new to using visual basic 2005. I have a tutorial book and I have followed it but it does not help me understand. I have a limited understanding of the net framework and the drag and drop features.
What I want to know is this: How do I make a simple name and address tracker file that I can enter data and save it as a file. The book does not cover this proceedure but It is what I want to do.
IE: Start VB2005 start new windows app. Name (whatever) drag 2 label's and 2 textbox's and one button for saving data entry. I want this program to enter name in textbox1 (press enter) then enter address in textbox2 (press enter) then save file (whatever name) when you click the button.
Is there anyone can post a simple code using vb,that start building a simple games ?
View 2 RepliesI'm looking to take a small snippet out of a wave file which I can do by reading in the headers, calculating time in to samples and selecting that data back to another file with the headers appropriate for the new smaller chunk.
My question though is does anyone use a nice small free library that does something like this. With the numerous different versions of wave files and headers not matching I'm trying not to re-invent the wheel and if someone has done it already and can handle these discrepencies that would be amazing. If not I'll fire up the kettle and get the coffee on.
I have a dbase.txt file with some data in it. i.e -
Institution Course StudentID
XZY ABC 2010-1111111 "the spaces between columns is one tab space"
XYZ ABC 2010-1222222
XYZ ABC 2010-1333333
I want to perform simple SQL like operation - i.e -
SELECT * FROM dbase.txt or
SELECT Institution FROM dbase.txt WHERE StudentID=2010-1111111 and an insert operation like -
INSERT dbase.txt VALUES (XYZ ABC 2010-1444444)
I have written some code which is not even closer to what I mentioned above. My program can read only the whole text file. There is a menu, but not functioning well, as well as my write function which is not working at all.
Below is my code -
Imports System.IO
Module Module1
Sub Main()
Dim intInput As Integer
Console.WriteLine("Main Menu")
[Code] .....
I want to make a simple file downloader that downloads files off the internet partially executables from [URL]
What I am after is when I click on a hyperlink label it downloads the file or comes up with the Dialog box to download the file off the internet all of which will be executable files
how to fix the exception that occurs when an .EXE file is run from the the Network Share. This application works fine when running from the local machine. I have been trying a lot to fix this issue for a while, but without any success.
Here is the simple code I am trying to test :
string AssessmentFilePath = @"\abce.com
ootmditdevelopment estfile est.xml";
INetworkFileShareReader reader = new NetworkFileShareReader();
XPathDocument document = reader.GetAssessmentFileFromVendor(AssessmentFilePath);
[code]....
Getting a vibe that my VB is cursed. All I want to do is load a textfile and have the text appear in TextBox1 But no. I have looked at 3 different tutorials and I have tried copying their code word to word but still!
Public Class Form1
Private Sub ImportToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ImportToolStripMenuItem.Click
[CODE]...
And it gives me the following errors:
Error1Character is not valid.C:\Users\Saurabh Sharma\AppData\Local\Temporary Projects\WindowsApplication1\Form1.vb1067WindowsApplication1
Error2'daText' is not declared. It may be inaccessible due to its protection
CODE]...
Trying to make a simple browser with some simple addon's. What Ive done is setup a menu(forum) for the user to enter their email providers web address and it will save it in a xml file. When they click on the email link, it should load the email xml iformation and place that info in the tb_html.text and navigate. I keep getting a null exception and im not sure what going on here. Here is the code:
Browsers:
Private Sub btn_Email_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Email.Click
'Load Action
Dim SavedEmailObj As Storage
[code].....
I have been working on a file upload section within my ASP.NET site.With the below code, I am able to get a user to upload documents based based on the Regular Expressions set within the RegularExpressionValidator.I am happy that this works accordingly.What I would like to complete now is a message to indicate that the file has been uploaded successfully. I am unsure how to complete this, but would like to add it to a Label named "fileuploaded".Here is my code for the .aspx page:
<table width = "60%">
<tr>
<td>Modes of Operation:</td>[code]......
I am trying to convert a simple html file into pdf using iTextSharp, But it is not working. I am getting error :
Cannot implicitly convert type 'System.Collections.ArrayList' to 'System.Collections.Generic.List<iTextSharp.text.IElement>
d
private void Form1_Load(object sender, EventArgs e)
[Code].....
I am making a little game for my friend in Visual Basic 2008. It uses 3 files (gamedataidname.txt, gamedataidlevel.txt, gamedataidgold.txt).
When the play button is clicked, I wrote some code to check if the file exists and display the content of the 3 files. This part works fine. But then I have a 'Else' statement to create the files.[code]...
I need to create a function which accepts a single value of integer which specifies the width/height of the resulting image, which will only have a single black pixel in the upper left corner and the rest being transparent and saved as a gif file.
View 6 RepliesI am working on saving some simple strings (from InputBoxes) to an Xml file.I am also at the same time displaying these file entries in a Data GridView. My problem seems to be that as soon as the XmlDocument ("doc") is saved, a dialog box is displayed as follows: This file has been edited outside of the source editor I am getting the dialog, and 2) why I cannot run the routine again (without exiting the application first!). [code]
View 3 RepliesI want to catch the text from an html page.. you know that when you open any html page in the browser, you will see a text but with formatting.. because it's an html code having a lot of tags...
how to get the text from an html page and ignore all formatting and html code?
[Code]...
I am trying to read/write a simple text file in net 2008 but can't, as yet, get it to work. This is how I use to do it in VB6
Code:
MyStr = App.Path & "DataData.txt"
Open MtyStr For Input As #1
[code]....
Does anyone have a simple code for Moving and Renaming a Image File?
Here is an example of exactly what I need to do.
Ok let's presume the end user is Editing a Record named Mick's Milktart, the DataBase Table Field named ID (Primary Key) has a value of 237.The user clicks a button to add an Image to that Record.
An OpenFileDialog opened and an Image File named "NewImage.png" is selected by the user from "MyPictures".[code]...
I have a program with various settings, all stored in the app.config file. Often, I have a need to edit the connection string setting. I cannot do so using the My.Settings.myConnectionStringVariable method, as this is read-only. What I would like to do is have a big text box, and simply load the entire app.config file into it. The user could modify whatever they wanted, click save, and the program would save the new edits to the app.config file, and restart the program. I don't have a huge need to only pull out the connection string, as getting the text for the entire config file would suffice. However, if it is easier to pull out just the connection string from the config file, that would work too.
View 1 RepliesI have a simple text file containing a list of names that I wish to sort. I was hoping for something simple like:
System.IO.File.ReadAllText("MyFile.txt")
System.IO.File.Sort("MyFile.txt")
System.IO.File.WriteAllText("MyFile.txt")
or something like that. Didn't want to actually write a bubblesort/quicksort routine myself.
I would imagine the routine would just rewrite the final file or would I have to make a new file and copy the contents back to the original?
I'm trying to use an XmlTextReader to read simple XML data from a file I wrote using the XmlTextWriter class. I've very little experience with XML and reading/writing from it, so it's been a little struggle. The writing part went OK though, but I can't really figure out how to do the reading. All examples I found using google handled it all slightly differently, and none made it really clear what they were trying to read...I am storing the position, size and a filepath of MDI windows using this format:
xml
<?xml version="1.0"?>
<MDIForms>
<Form X="208" Y="95" W="424" H="277">C:UsersNickDesktopabc.plm</Form>
[code].....
obviously I cannot do what I want with this. I need to get the attributes in each element too, and I need to read multiple elements and do something for each element...
I am using Microsoft OpenXml SDK 2.0 to create Office 2007, 2010 files, specifically a very simple excel file. It has a simple header which is merged with 6 cells to center. Bold font size 16. There are 6 columns and each has a header. Bold font size 14. There are rows of data related to each 6 columns. I am looking for decent examples of OpenXml SDK 2.0 to get started.
View 4 RepliesEach year I have to create 1099s from a legacy system. So in the past I had Foxpro code that ran out of a directory near where the Foxpro dataware house was. In 2009 we moved to SQL so I have to convert the code to VB and SQL
But I need to still store the text files and the report and I wanted to save settings in this "working directory"
[Code]....
Does this seem like the propery way to do this?
Finding documentation on XML is really difficult, because there is so much yet all of the examples seem to do it a different way.
I am making a simple program that encrypts a text file and then decrypts it: why i get an error when i use this
Public Class Form1
Code:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
System.IO.File.Encrypt(TextBox1.Text)
[Code].....
I have managed to access and read a specific file line by line. If I wanted to split information by a comma or space and then sort alphabetically or numerically, how would I go about this procedure? Would I create a loop within the reading loop to parse the information?
Dim file As String = "C:Users est.txt"
Dim Line As String
If System.IO.File.Exists(file) = True Then
[Code].....
I am using it in conjunction with SQL2005. I am trying to replicate some simple activex script to create a new excel file that can be used as a data dump from a database.
[code]...
I have changed the file location references to make it easier to read. I have googled all morning but cannot find something that helps me. I think it has something to do with references?