I have problem, how I can import HEX file to my program in VB .NET? And I have question if I can import, What size of file I can import? I have 200MB - 400MB HEX files?? Can I import so huge files?
View 18 RepliesI want to write a program to do Markov chain, but my states are quite large. First of all I calculate all the transition probabilities and revenues for all states(1381860 total states), and store in a multidimensional array. Public RevArr(0 To 9, 0 To 750, 0 To 282) As Long
After that the iteration of markov chain should use these as inputs to calculate the steady-state probabilities. But when I try to run the main code I got this error.Exception of type 'System.OutOfMemoryException' was thrown.
The following is the declaration of second array I add just another dimension for storing all the iterations, but I get this error. Dim stateprob(IT + 1, 0 To 9, 0 To 750, 0 To 282) As single
I need to open a text file, remove lines in the file that contain specific starting characters, and save the file back with a different file name, is this possible? The file contains a header record, detail records, and a trailer record. There are other records that I do not want in the file, this records have a specific starting character. I can open the file in VB, copy to another string variable, but cannot find out how to remove the lines I do not need and save the file.
View 9 RepliesIs is possible to import or migrate .txt files to my database? Im using VB 2010 Express. Im just a newbie in Visual Basic and I need to import a text file into my system.
View 3 RepliesI have a standalone aspx with vb.net backend file. I need to import google api referance in this file. If i put this file in a asp.net application project, the referance gets imported easily by using "add referance". But when i use a standalone file, the referance cannot be imported.
How can i import this google api referance (or any referance) in an aspx file without having to make a project for it?[code]...
I wrote a program to download and play AVI files the files are large in size and long time wise. I have the files playing as they are being downloaded but i can't see how long the file is or seek reliably. i was reading that the AVI headers are in the last 512kb of the AVI file *why would't they put it at the start* lol so my question is is there a way to download the last 512Kb of the file i'm downloading. i have the Bytes Read and Length of the file while its downlaoding i'm just not sure where to go from there, or how to do it atleast. If i had the length in time of the Avi file i could set the trackbar to be able to seek properly. or if someone has an idea how i could get the time of the video by using fps and some math i could prob do it that way too but idk how i would tell how i can find how many kb are in the fps i'm sure it changes so think that way is't going to be reliable. how to get the last 512kb would be the best option not sure if it can be done even.
View 4 RepliesI'm developing a VB.NET application to obtain data from any data source (using an odbc connection string), and because this i can't use specific .net connectors like MySql.Net connector and i can't previously know if the file/DMBS supports LIMIT parameter. This app will read data from a table in the data source and use the information to make some files. At this point there was no problem with some tables because they are less than 3,000,000 records length, but there is a table that has 5,000,000+ rows length, and when i send the query the connection is lost. I'm working with OdbcDataReader, because i read on MSDN site that this is the best way to read a table one row at time and i just use each record once.[code]...
View 2 RepliesI am currently trying to create a program to list a large group of numbers for me. My final goal is to have every 2, 3, 4, ..., and 9 digit number containing only "1" "2" and "3". I thought I would go about this by using the following VB.NET program and then copying it into a text editor, and using find & replace to eliminate all other numbers.
Public Class Form1
Dim Start As Integer = 333333333
Dim Counter As Integer = 333333333
[Code].....
it fails due to the massive amount of processing that needs to take place. However, adding the intervals requires a great deal of time for each number to be displayed without any crashes.
Is there some way (in VB.NEt or another language) to get the number list I want in a short (an hour or less) amount of time?
I've build a large program with many references. F.e.:
System.Data.DataSetExtensions
System.Linq.Dynamic
I've to write a Dynamic Linq Expression: [URL]
In my case: Dim query As IEnumerable = ds.Sales.Where(strWhere)
But with System.Data.DataSetExtensions Where is misinterpreted. The compiler expects (Datarow, Integer, Boolean). If I delete System.Data.DataSetExtensions everything is ok with this expression, but I get many other errors, so I need this reference. What can I do that the Where is interpreted correctly?
this code takes about 30 mins and high cpu usage, what is the problem
Do
strLine = objReader.ReadLine()
If strLine Is Nothing Then
[code].....
How can I import "System.Data.MySqlClient" in visual basic.net?
When I'm typing that code it produce an underline to the code and having an error of undefined namespace.
I'm trying to import an XML that's provided by twitter into a readable format in Visual Basic.[code]...
Now, I want to display it in a panel that automatically refresh after a certain period, however, I only want to pick out certain bits of info from that xml, such as profile_image_url and text and created_at. You can guess how the data will be formatted, much like that presented in TweetDeck and other Twitter clients.
I have a program that has a large set of classes in it. A certain incident (I won't call it an event, yet, as that has a specific meaning that will cause trouble later) needs to a relatively small subset of these classes a question. The subset of classes will need to respond to the question, but for it to be able to do so, the classes may first need to ask a similar question of the same subset, which may prompt yet a further question, though this recursion will never go more than three or four levels down. Since only a small subset of these classes will participate in the questions, while the majority will never participate, and since all of these classes are virtually identical, and I can know at design time whether any given class is part of the subset or not, an event is appropriate. The main class can raise an event, and those classes in the subset can handle the event, while those classes that are not in the subset won't handle the event. Furthermore, any of these classes can raise the event again with different parameters, as needed. Thus far, an event appears to be ideal.
The problem is this: As a result of the event, each class will need to add one or more strings to one of two lists. Event handlers can't return anything, so I can't be using the return values from functions to populate these lists.
Two options appear possible:
1) Include the two lists in the event arguments.
2) Have the two lists be accessible to all classes, and don't pass anything around.
The second part of the problem is that the event is effectively a question being asked of each class, and no action can be taken until each class has responded. If I simply raise an event and let each class respond, can I be certain that all classes that should respond have? An alternative solution would be to have each class expose a method, and call these methods for each class in turn. By doing this, I could get return values, but I would have to call the methods for ALL the classes, not just the subset that actually cares (the classes are all different types, but they all implement a common interface, and are added to a List (of ) that interface, so I can iterate through them all without much difficulty). So, the event seems more efficient, but adding a function to the common interface for the classes is the approach most certain of being a solution.
I'm writting a dll in Fortran. I've included some common blocks in the fortran code. And I don't khow how to import it to Visual Basic.
View 2 RepliesI need to import live/hotmail contacts using asp.net. I have done gmail and yahoo. i looked at opencontactsnet.dll and it doesnt work for live. none of the contacts are retrieved from that dll.
View 1 RepliesI've written an algorithm that I believe to be correct for computing prime numbers up to n with the Sieve of Eratosthenes. Unfortunately, this program hangs on really large values of n (try 10 million). Here is what I've written...
Protected Function Eratosthenes(ByVal n As Integer) As String
Dim maxValue As Integer = Math.Sqrt(n)
Dim values As Generic.List(Of Integer) = New Generic.List(Of Integer)
[code]...
How might I speed this algorithm up? Where are my bottlenecks?
this code takes about 60 mins and high cpu usage for a text file of 90,000 lines, what is the problem..[code]
View 9 RepliesI am attempting to read Excel 2003 cell content through a Visual Basic 2008 program. Searching Help for the subject yielded an example Function named XLGetCellValue (ByVal fileName As String, ByVal sheetName As String, Byval addressName As String) As String
This function required the following Iports:
Imports
System.IO.Packaging
Imports System.Xml
Imports System.IO
upon pasting the above three Iports to the Program, Igot the following error message:Warning 1 Namespace or type specified in the Imports 'System.IO.Packaging' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases.
I'm a beginner in VB.NET and I use VB 2008 express edition. I was searching in Google for a tutorial on how to import data from an excell sheet into VB but i couldn't find anything and therefore I decided to ask for help here. Firtly, let me explain you my "problem". Let's say we have an excell sheet with a number in the A2 cell and another number in the B3 cell. I want to make a program in VB that makes calculations with the values in the A2 and B3 cell of the sheet. This is just an example though. Of course I want to do more copmlicate things than doing calculations between those 2 numbers..
View 4 RepliesI want to know what code should be used in order for me to import data from an excel file to dataset and then adding it to the database
View 7 RepliesI need to import data from Excel to Sql Server using ASP.NET.
View 4 Repliestrying to input a text file that's tab delimited that looks something like this.
2.2 5.6
3.7 9
1.2 9.1
[code].....
The file is a UTF8 text files.
Each characters has varying number of bytes and each line has varying number of characters.
Does vb.net has table of line numbers to byte location function or something like that?
Also after that how to read that?
I am writing an application in VS2010 using VB.net.The application is relatively simple and I would expect the .exe to be less than 1 Meg.I have written a couple of applications that are quite a bit larger that are less than 2 Meg.I am compiling in "Release" mode.The file size is 29,127 KB (in debug mode it is just 29,167 KB)Where do I start looking to find why the .exe is so large?
View 2 RepliesAny way to import passwords into all program downloads. For example, if I wish to give a certain user a password I can somehow insert it into a program, and it updates all the programs which have been downloaded. It just saves editing the code, then releasing another update to include new passwords for people to use. Maybe if there's someway to auto update when an update is available, it would work. Here is the coding for a password. I just need to find a way with will mass update everybody's program when I want to add a new password for another person.
Private Sub ButtonX2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Verify.Click
My.Settings.Password = TextBoxX3.Text
My.Settings.Save()
Incorrect.Visible = True
[Code] .....
I'm trying to import a tab delimited file into a table.The issue is, SOMETIMES, the file will include an awkward record that has two "null values" and causes my program to throw a "unexpected end of file".For example, each record will have 20 fields. But the last record will have only two fields (two null values), and hence, unexpected EOF.
Currently I'm using a StreamReader. I've tried counting the lines and telling bcp to stop reading before the "phantom nulls", but StreamReader gets an incorrect count of lines due to the "phantom nulls".I've tried the following code to get rid of all bogus code (code borrowed off the net). But it just replaces the fields with empty spaces (I'd like the result of no line left behind).
Public Sub RemoveBlankRowsFromCVSFile2(ByVal filepath As String)
If filepath = DBNull.Value.ToString() Or filepath.Length = 0 Then Throw New ArgumentNullException("filepath")
If (File.Exists(filepath) = False) Then Throw New FileNotFoundException("Could not find CSV file.", filepath)
[code]....
I've tried using SSIS, but it encounters the EOF unexpected error.
How do import all files whit the same extension (whit extension i mean all for example .exe files or .avi files) directly in an listbox as the program loads. [code]...
View 4 RepliesI am trying to read this XML document.
An excerpt:
<datafile xmlns:xs="[URL]" xmlns:xsi="[URL]" xsi:noNamespaceSchemaLocation="wiitdb.xsd">
<WiiTDB version="20100217113738" games="2368"/>
<game name=" Wanted: 50 Wacky Jobs (DEMO) (USA) (EN)">
<id>DHKE18</id><type/>
<region>NTSC-U</region>
[Code] .....
It just skips the "While iter.MoveNext" part of the code. I tries it with a simple XML file, and it works fine.
I have a simple app that reads from a very large text file, and returns a value if a string is found. I can instruct users where to download the file, and where to put it, but it would be nice if I could embed the file with the publish, so that the program knew where to look by default.Getting users to download a seprate file is painful. This file has 1.4 milion lines of text. I really need it to look for the file in a predictable place and be able to run against that by default for most users. I can have experienced users browse for a new file, but most people aren't into that much thought.
View 8 RepliesI'm trying to load a large CSV file into a Microsoft SQL Server Compact 3.5 database. I've tried using the following: Using MyReader As New Microsoft.VisualBasic.FileIO.TextFieldParser("filename.txt") MyReader.TextFieldType = FileIO.FieldType.Delimited MyReader.SetDelimiters(",")Then splitting the data with MyReader.ReadFields() etc, before using this data to add rows to a dataset in a database table in my project. However, my CSV files are very large, at above 9.5 million rows, and this takes forever, if the computer doesn't crash also. Does anyone have a better idea for what to do? I would like the CSV file to be loaded into the database table, to enable me to sort it, and undertake some querys and maths. The CSV data structure is:2,193,761.40000000000012,43,1510.22,8,1929.60000000000012,22,2564.52,22,2791.70000000000032,19,2971.6000000000004
View 3 Replies