I am writing an application that has a user enter a wage per hour plus an anticipated salary increase percent and calculates the the users salary for the next 10 years. I have received some help from a few folks who are beginners like myself with visual basic and we are at a road block.
Public Class Form1
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Error1Expression is not an array or a method, and cannot have an argument list
I am indifferent if you are a VB.NET or C# or other .NET developer. I have a FACTORY class like the following:
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I have a problem when writing some text to txt files.Here is my My.Computer.FileSystem.WriteAllText("test.txt", tekst, False)where tekst is a string variable.
When opened in some HEX editor, test.txt begins with 3 unwanted characters - ASCII values: EF BB BF. Notepad isn't showing them.
what is the different writing code application vbnet 2005 application for single user and multiuser?
View 3 RepliesIt would be easy enough to make my own system for this, but I'm figuring that the .NET library, being as massive as it is, probably already has a class made for this very purpose.For hit detection, my VB.NET game uses two 2D arrays that store the state of each pixel in the level. Each element in these arrays is a Byte (or, more accurately, a value of a flag enumeration type based on Byte).
Public TiHD(,) As HitDT ''//State of each pixel in the level based on
''// its underlying tile.
Public SpHD(,) As HitDT ''//State of each pixel in the level based on[code].....
I would enjoy being able to just give each sprite & tile its own 2D array of hit detection data (defining which pixels of the object are solid, dangerous, etc) that can be directly written to TiHD or SpHD at a specified offset.I'm willing to bet that .NET has a class that can do this for me.Presumably I would just have to pass TiHD or SpHD to the constructor, and then I would be able to use the object to indirectly modify the array with extended functionality (similar to using a Graphics object to modify a Bitmap). Is there such a class?
I have an array that varries in number of values, depending on the information . I am trying to write the array values in a line in this format:Clients ("John,"Samantha","Joe")in this example I used Three values in the array, but in some senarios there might be more or less number of values.what would the best way to write this line in between brackets as I mentioned in the Eample.
View 4 RepliesI have a structure in memory which is working fine - now I need to write this entire structure to a file. The below code almost compiles, the problem is that "mstaRecordInfo" cannot be changed to a string, probably because of the Date field. I've just spent over an hour experimenting and searching the web but have gotten no closer to a solution.
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Situation: I have a .csv file containing numerical values. I'd like to read the file and write the values to a 2-D array of the same form. Problem: I get all the rows of the .csv file written to a 1-D array. Looking at the code, I thinking I have the indexing for column and row positions incrementing properly but (besides experience in C#) I don't know what I'm missing. Below is the code accomplishing this.
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i want to which way is better when concentration is on processing speed. i want to call a method that compute some data that method is on another form in my windows form application then what you prefer is better way 1) to call that method in another form and use returned value or create similar method in form where it is required.i want to make it's processing fast.
View 3 RepliesI am trying to write a program that will use a Structure with <VBFixedString(4), VBFixedArray(10)> Public Test1() As String. Back in vb6 it was in the Type statement as Test1(10) as string *4 When I hit the line ".Test1(X) = TB1" i get the following error:
Object reference not set to an instance of an object.
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I�m currently working on a school project and I have encountered a problem in my code. When i write the contents of my listbox to a file called stock.txt it seems write an invisible linebreak in-between each data entry, my problem is that when I load my array on the next form those invisible linebreaks causes my array to load the data incorrectly.
I have attached a pic of my stock.txt file
The Code that Edits and writes to stock.txt
Private Sub BtnRemove_Click(sender As System.Object, e As System.EventArgs) Handles BtnRemove.Click
'Removes the selected item from the listbox then updates stock.txt
lbxStock.Items.Remove(lbxStock.Text)[code].....
Now it seems like a really simple question and I may just be being thick, but what I'm trying to achieve is basically print an array to screen in the following format: Item 1, Item 2, Item 3, Item 4 Although I say to screen, as that was the best way I could describe it, I'm actually writing it to the page inside some Javascript. The way I'm currently going about writing it out is as follows:
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I'm reading a txt file into an array and then writing a new file one line at a time. The reason i'm using array is that i'm searching for a few lines that i want to find and replace.
However in my file I have some ascii characters but they aren't read well. I read something about System.Text.Encoding.Default but I don't know how to implement it in my code.
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I can write a 1-d string array to file with:
Dim test() As String = {1, 2, 3, 4, 5}
File.WriteAllLines("C:MyFile.txt", test)
but can't see how to write a 2-d array to file.
I've tried this:
Dim test(,) As String = {{1, 2, 3, 4, 5}, {34, 22, 12, 33, 55}}
Dim myfile = File.CreateText("C:MyFile.txt")
Dim row, col As Integer
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I am making the belated transition from VB6 to VB.NET (2008). I would appreciate some guidance on writing arrays to a file. I need to save and load large arrays of 4-byte floats (24 x 90,000 values is not uncommon). I can load or save them using nested for-next loops, but that's quite slow. I'd like to find a single operation that can read or write the binary data.In VB6 I could accomplish this (writing case shown) with Put #1 , , MyArray()I can read and write single variables from binary files without problems in .net. For example, [code]I have looked and looked, and Googled endlessly, but cannot find out how to accomplish a single-line numeric, floating-point array read or write in VB.NET.
View 3 RepliesI coded anything but I remember when using VB6 or Pascal/Delphi we used to define records/ structures with fixed length fields, then write those structures to a file knowing that they would always be the same length. You could then open a particular record within the file or simply find out how many records existed by reading the file length.From what I understand, it seems that such methods are depreciated in VB.NET and such structures are written as a stream.Does it now mean that we can define things like variable length strings and not need to worry about buffers or boundaries?Is it possible to read through such files and pick out individual records? Are there methods of determining how many records that exist in a file? What I'm looking to do is simply store multiple records of a structure in a file then retrieve them into an array so I can manipulate their order by sorting the array and search within the array. This is only a learning project so it is unlikely that the resultant array is going to be large, although if this is not generaly a good method of doing this then it might be interesting to fidn out what is. So far, I have read that they way to write a structure to a file is to "serialises" it and then write the bytes - is this correct?[code]
View 5 RepliesI'm using Process.Start method to launch another application from my application. Until today, there was no problem. But I have tested my application in a different OS, Windows XP (SP3), and my application didn't work right on that. I'm also using arguments to run that application. I guess for some reason my application couldn't send arguments to other application correctly under Windows XP. Maybe it is related to my code. But you should know, it works great on Windows 7.
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I've tried rewriting this code several times, it spits out the bytes correctly, but then when trying to read the array created from the memory stream, it's empty, what am I doing wrong?
Dim bytes() As Byte = System.Text.Encoding.ASCII.GetBytes("test this shit")
Dim bytesString As String = ""
Dim i As Integer = 0
i = 0
Dim byteStream As New System.IO.MemoryStream
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why i get these followinf error in the following codes please
'Delet the file on the path, it does exist
Dim deletfile As System.IO.FileStream
deletfile = System.IO.File.Delete("C: emp.txt")
i get error underlining in blue the part
System.IO.File.Delete("C: emp.txt")
and the error is "express does not produce a value" second error i get is in this code
Dim datawriter As System.IO.StreamWriter("C: emp.txt")
where
("C: emp.txt")
is underlined in blue n the error says "array bounds cannot appear in type specifier"
is this a good idea or not really? instead of having to open a file through filestream, i would like to just save text in an encrypted format in application settings. is this OK if the text is under 10mb? what would be the best way of implementing this?
View 2 RepliesAm writing a GPS application but I need APIs or Libraries I can easily use. It's supposed to work real time...
View 5 Repliesi am writing a exit button for my application i am using the code :
MessageBox.Show(
" Exiting Application . ", " Application Closing ", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question)
How can i make it as such when i click "no" & "Cancel" it will not exit the application and only on yes it will exit ?
This windows application finds the amount of your pay if your pay is doubled each day, starting with a penny a day or a nickel a day. Instead of one month's salary, a boss offers her new employees a penny the first day and experienced employees a nickel the first day under a new pay system. Each day the pay will double.Restriction: The minimum number of days for the pay period is 19 days for the new employees and 16 days for the experienced.
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
Dim intNumberOfDays As Integer[code].....
I'm handling the Application.UnhandledException event in a WinForms app and need to log exceptions caught there. My app.config is set up to log exceptions to a FileLog and an EventLog.The problem is that when running as a non-admin user, the EventLog cannot be written to because of a SecurityException - I get the message "The source was not found, but some or all event logs could not be searched."I understand why - the user does not have permission to create the EventLog source, but the question is how should this source be created? As I see it, I could either:
1) Create the EventLog source with my installer, as this is running as admin. How to do this?
2) Create from within my app, by somehow elevating permissions? But this would give the UAC prompt on Vista.
What's the best practice for creating a Windows Application EventLog source on a client machine?
Public Shared Function EncryptRSA(ByVal infilename As String, ByVal outfilename As String, ByVal pubkey As String) As String
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how to use Array.Exist. I want to check if a value already exist in the array or not. Below are my sample code.
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Type argument inference failed for type parameter 'T' of 'Public Shared Function Exists(Of T)(array() As T, match As System.Predicate(Of T)) As Boolean'. Type argument inferred from the argument passed to parameter 'match' conflicts with the type argument inferred from the argument passed to parameter 'array'.
How can you write a VB.NET Windows Forms Application via CodeDom? I have tried everything, the closest i got to it is the code below, which first of all shows command prompt window which is not good, and then shows the form for like a second and everything disappears.
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I'd like to create a simple application to determine the writing speed. In this application I want to view a line of text (may be more than one line) to the user to write it. And I want to select (higlight) the character the user pressed in my line and to move like a cursor to the next character (or to put underline under the current charater). How can I do that? and what is the object or component i must use to insert the text. Finally, if I want to make it multiple lines how to determine the enter key pressed by the user and how to move the cursor to the next line?
View 2 RepliesI found some code online for a vb paint application and I modified it for my use, which is a signature application. It uses a tablet connected to the pc to write the signature on the screen and then save it as a bitmap for later retrieval.The only issue i am having right now is that if you write on the tablet too fast, the signature gets broken up alot, any way to quicken the paint process in the code so that I can get a smoother signature?
Here is my code:
Imports System
Imports System.Collections
Imports System.Data
Imports System.IO
Imports System.Xml.Serialization
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I'm writing a small application that downloads some files over ftp, the incoming directory is monitored by FileSystemWatcher_Created, on creation I want to extract some text from the file and call another application with the text as parameters the problem I have is the FileSystemWatcher_Created procedure is triggered before the file has finished downloading, I could download it elsewhere and move into the monitored directory but some of the files may be quite large and Im wondering if there is an efficient way of waiting until the file is ready? along the same lines what is the best way to queue the tasks as there can be many files coming it at one time, I've looked at threading but would that be suitable for such a task as there will still be a bottleneck at the application called by FileSystemWatcher_Created ?
heres an outline of what im doing:
Private Sub FileSystemWatcher1_Created(ByVal sender As Object, ByVal e As System.IO.FileSystemEventArgs) Handles FileSystemWatcher1.Created
'read text file
[code]....