I have function on client side that get file, make a byte array from it and send that array to the web service on server!This is the function on client side:
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I created a subroutine to copy and paste a file using the binaryreader and binarywriter. It works fine from what I can tell. The file sizes match up any how but I was wondering if anybody had an idea on a better way to get the amount of bytes that should be copied in one set.
binwriter.Write(binread.ReadBytes(100000)) I want to make the readbytes as large as possible without crashing the users computer.
I need to store/retrieve a bit from a data table of 3.268.760 bits long.
Using w As New BinaryWriter(File.Open("test.bin", FileMode.Create))
for x = 1 to 3268760
For i = 1 To 3268760[code]....
the w.write(?) stores a boolean value meaning 0/1 for false/true values, but Vb.net seems to use an whole byte to store this data which is too expensive for my table (3.268.760^2).Is there a pratical way to store/retrive single bits from a file using vb.net? (meaning as little as possible conversion to other types).
I am using BinaryWriter class to write a binary file to disk. When I invoke the Write method, passing an unsigned short value, it writes it in little-endian format. For example:
bw.Write(0xA000);
writes the value in the binary file as 0x00 0xA0. Is there a way to make BInaryWriter use Big Endian? If not, is it possible to create a new class, inheriting BinaryWriter and overload the Write function to make it write big endian?
I need to write a file that will be built mostly from simple text and divided by "|" but in one of its fields i must to use BinaryWriter to store the string as binary and not a simple text, is there a way to do it?
View 10 RepliesCan you delete stuff inside of a file after you have committed it to the binary file? I noticed that you can still read the stuff inside of a binary file.Also is there a step by step tutorial for the binaryreader and writer
View 3 RepliesHow do I get the current write-position using the BinaryWriter. I need to store the position in order to read from that position afterwards. (I know it would give the position where the next write would start, that will be taken care of).
View 2 RepliesOkay, this actually relates to some work I'm doing that I already have something in place. So if a change is necessary down the road, I'm in no hurry... But I did a dangerous thing and began reading. As I began reading about ways to stream file data, I became curious as to when it is a good idea to one method or the other.
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I am getting the following message from this code and I cant figure out how to fix it: ArgumentOutOfRangeException was unhandled
View 8 RepliesI am getting an ArgumentOutOfRangeException when I try to run the following code,[code]the table that is being read has a single row of data, the database and connection are fine as I can run INSERT/UPDATES etc but wherever I have used a datareader I am getting this exception each time on the "Using reader As MySqlDataReader" line.
View 2 RepliesI am trying to do an assignment for a programming class. The program works for items that are in the list boxes, but when I test one that is not (and a message box should then pop up) I get this error message instead.ArgumentOutOfRangeException was unhandled the InvalidArgument = Value of '5' is not valid for 'index'Parameter name = index
Here is my code...
Private Sub displayShippingButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles displayShippingButton.Click
Dim isFound As Boolean
[code]....
I was using vb6 for ADODB program with MS Access as database file. It was running fine with vb6.Later I upgraded the project to VB 2005 express edition. When I try to run the project, It load listview, retrieving data from Access file (MDB). It shows the error ArgumentOutOfRangeException error.This was my vb6 sql code to LoadListView.
Set objNewListItem = lvwCustomer.ListItems.Add(, , txtFirst.Text, , "Custs")
PopulateListItem objNewListItem
With objNewListItem
[code].....
Later I upgraded the project to VB 2005 express edition. When I try to run the project,It load listview, retrieving data from Access file (MDB). It shows the error ArgumentOutOfRangeException error.This was my vb6 sql code to LoadListView.
Set objNewListItem = lvwCustomer.ListItems.Add(, , txtFirst.Text, , "Custs")
PopulateListItem objNewListItem
With objNewListItem
[code].....
I'm developing a asp.net webforms website using vb.net. In that list of files displayed in a gridview as links, when clicked on a link it calls OpenFile method. This code I found on the web is used to download file stored in webserver to client, this works fine for images but when I try to download .docx or .xlsx file it gives an errorin the line "Response.BinaryWrite(btFile)", but downloads the file. Given below is shortend version of the actual code
View 1 RepliesI'm having this
vb.net
Dim strQuery As String = "SELECT * FROM tblHistory" ' ORDER BY moniDate DESC"
Try
'~~~ Create the connection
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This is in the Form_Load to populate a ListView control. But I'm getting the following error:
InvalidArgument=Value of '1' is not valid for 'index'.
Parameter name: index
Where am I doing it wrong?
I get an ArgumentOutOfRangeException was unhandled error,
Specified argument was out of the range of valid values.
Parameter name: index when I try to populate a treeview in VB.Net 2010. Below is my code. How do I fix this error?
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When I try to debug this code. I got an error like this.
Module Module1
Public Declare Auto Sub mouse_event Lib "user32.dll" (ByVal dwFlags As Long, ByVal dx As Long, ByVal dy As Long, ByVal cButtons As Long, ByVal dwExtraInfo As Long)
[code]....
It's about "System.Console.SetCursorPosition(130, 345)" how do i fix this?
It's something with "ArgumentOutOfRangeException was not unhandled".
I have an unbound DateTimePicker Control on a form. When the form loads the control shows 2005 - 01 as expected. I can use the arrow keys left and right to switch between highliting the year or the month. Pressing the up and down keys to change the month doesn't work an exception is raised. I don't understand why. I started a new project. Just added a DateTimePicker and the following code.
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I have a dropdownlist with a list of options which is subject to change (e.g. 'active users'). Another data source may include historical data, but I wish to use the 'active users' dropdownlist against it. This means an ArgumentOutOfRangeException will be thrown so I want to catch that, and insert the required entry into the dropdownlist on the fly.
I've seen a few suggestions that point towards overriding the ondatabinding event within the dropdownlist, I've managed to do this insofar as I can create a static listitem for example "Value does not exist" and bypass the exception. However I wish rather than "Value does not exist" so show the actual value which we were attempting to find in the ddl.
ondatabinding is passed a standard EventArgs item which doesn't offer much to go on, I can see there is a DataListItemEventArgs class - is this in any way associated with a dropdownlist? I tried directcast on the EventArgs but that didn't work.
So is there any way - within ondatabinding - of finding out the value we're attempting to set on the dll, which causes the ArgumentOutOfRangeException?
I Was Coding A Tabbed Web Browser With A Progress Bar In Visual Basic 2010 Express Edition. I Started De-Bugging The Browser When It Pointed To This Sub: Private Sub Loading(ByVal sender As Object, ByVal e As Windows.Forms.WebBrowserProgressChangedEventArgs)
ToolStripProgressBar1.Maximum = e.MaximumProgress
ToolStripProgressBar1.Value = e.CurrentProgress
End Sub
And Showed This Error Message: ArgumentOutOfRangeException Was Unhandled By User Code Value of '-1' Is Not Valid For 'Value'. 'Value' Should Be Between 'Minimum' And 'Maximim'
LoopBegin:
Do Until strXMLSingle.Contains("ENDOFXMLCHECK")
strXMLSingle = getTempFile.ReadLine
If strXMLSingle.Contains("<character") Then
[code]....
I have that so far. It was working great for the names part until I attempted to do the level part, now i get the following error:
System.ArgumentOutOfRangeException: InvalidArgument=Value of '1' is not valid for 'index'.
Also at the line where i use a goto statement to go back to the beginning of the loop, is there any way i can do that without a goto statement? Like a second loop statement or something?
I got this error and I don't know what should I do. Index and length must refer to a location within the string. Parameter name: length That's the line that i get the error on:
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So I need to write out an object to a text file as well as read in objects from text files.How do I accomplish this? This is the code i've used to read and write just simple lines of text. Is there a small modification to this or just a different function i use to read in an entire object?
Code:
Dim path As String
path = "Security.txt"
[code].....
I have just recently been using VB 2010 after using VB5. I have noticed a lot of changes. The problem I have is that I wish to open and save text files to and from arrays in the background. I've attached what I would do in VB5. I have searched around, but all the examples I find use a Textbox instead of an array. Can anyone show me how I can do this with VB 2010?
View 1 RepliesI am creating a text file using a save file dialog and copying the path to the text box which file is used to write from vb.net. when i try to write i get an error "The process cannot access the file '....fileName.txt' because it is being used by other program".
The code is below
Public Sub writeInTextFile()
Try
Dim oWrite As New StreamWriter(TxtOutputPath.Text)
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I am attempting to gather a group of file names from a directory. I am able to do this. I tested the code by having the list populate into a listbox and all desired items were added to the list.
Here is my code:
Dim di As New IO.DirectoryInfo(strPath)
Dim dir1 As IO.FileInfo() = di.GetFiles("*.txt")
Dim dFiles As IO.FileInfo
ListBox.Items.Add(dFiles)
However, a listbox is not my desired output. I am attempting to write these file names to a text file for purposes of then parsing the information to a datatable to compare with another datatable. How to get my filenames written to a textfile.
I am working on a program using VB.Net 2010 which will enable me to setup groups of files & folders for back up with syncing capabilities etc. I have a concept program which is based on some sample code I found out in one of the VB.Net forums. I have modified it from a command line based program to a form based program. At the moment I consider this code to be a "concept" program which once I have the various copy/sync routines developed and debugged will be integrated in to another program I wrote for
creating "Back Up" groups to automate the process. There are some 3rd party programs that do similar things that I want to do such as Microsofts Sync Toy, but none of them offer the grouping and exclusions options that I am going to program in to this backup/sync program.
So here is my problem, I have the included code taking two folders, a source and a destination, and copying everything from the source to the destination. It will skip over any unchanged files/folders and will delete anything found in the destination folder that is not found in the source folder and it will update all files in the destination folder that have a newer version in the source folder. In other words it will mirror image the source to the destination but will be smart enough not to copy unchanged items from the source to the destination thereby saving a lot of time. The sync part of the program is working fine, the displaying of the progress and results is not.
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I 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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I am trying to print the contents of my array to a text file, but instead of just printing whats in the array it prints all indexes even if they are empty.
this is the code i am using..
Code:
FileOpen(3, "garbage.txt", OpenMode.Append)
Dim intCounter As Int16
For intCounter = strFirstName.GetLowerBound(0) To strFirstName.GetUpperBound(0)
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for a school project I have to write data from a listbox to a new file that a user can create. I can create and save a file no problem, but for some reason I can't write anything. I followed the textbook provided but when the file saves, I open it up and it is blank. I'm using fileWriter.WriteLine and I'm just test something basic to write to a file first and I can't do it:
Code:
Private Sub storeFileButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles storeFileButton.Click
'creates a new file
Dim result As DialogResult ' stores the file
Dim fileName As String ' name the file to save the data
[code]....