Data comes into the project from various sources and sometimes I am seeing what looks like a tab character
in front of the actual data. Now I thought this would work, covering all eventualities. but I get
'Conversion from string "Z" to type 'Double' is not valid.'
check is declared as a string. If Microsoft.VisualBasic.Left(check, 1) < Asc(32) Then
[Code]...
I am using a Rich TextBox in VB.NET and passing to a StringBuilder. I need to replace the New Line character from the TextBox with either a space or a comma. Problem is the standard codes for new line don't seem to be picking up this New Line character in this case. Is there a specific character used in Rich TextBoxes as the New Line?
View 5 RepliesI'm looking to remove certain elements from a HTTPWebRequest I have attached the elements I need to remove in an image (elements are coloured red):
I've tried:
System.Net.ServicePointManager.Expect100Continue = False
for one of the elements but to no avail I've also tried:
webRequest.Headers.Remove(HttpRequestHeader.Connection)
here is my code:
Dim content As blah.Content = New blah.Content
Dim inputguid As String = Guid.NewGuid.ToString
Dim service As blah.WebService = New blah.WebService
[Code]...
Why is it that this VB.NET code only works for detecting flash disks?
Select Case m.WParam
Case WM_DEVICECHANGE_WPPARAMS.DBT_DEVICEARRIVAL
MsgBox("USB Inserted")[code].....
What would be the possible way to detect the insertion and removal of other USB peripherals, such as mouse and keyboard?
I am having problem with my FYP that my application is based on the detection of Insertion and Removal of a device. I am aware that this would happen using Win32_VolumeChangeEvent class or WMI. (Please notify me if I am wrong). Kindly solve this problem and send the code for Console Application in VB.NET. Please do not send code in any script language or C#. Also to get the device information.
View 6 Repliesscardgetstatuschange DOES wait(timeout is set INFINITE by -1) for card-insertion after connecting the reader-device to the pc. After a card is being insterted the first time and removed again, it won't wait any longer and returns immediately everytime;
lResult = SCardGetStatusChange(DethContext, -1, rgReaderState(0), 1)
So, scardgetstatuschange CAN work. But why only when i re-attach the cardreader-device to the pc????
removal of items in a collection or list using the " For Each " statement to iterate through.This code works:
For Each item As ListViewItem In ListView1.SelectedItems
ListView1.Items.Remove(item)
Next
This code does not:
For Each itemChecked As Object In CheckedListBox1.CheckedItems
CheckedListBox1.Items.Remove(itemChecked)
Next
I have been reading on this for hours today to find out why the first code block works, but the second does not.What I've learned is the "For Each" statement implements the IEnumerable interface. I have seen these terms used many times and scratched my head when it didn't make scense, then just moved along, something to strain my brain about later.Today was later...So since the IEnumerable interface is used, the .GetEnumerator method of the IEnumerable interface is called upon at the beginning of the "For Each" block, this evaluates the collection or list as in: For Each item As ListViewItem In myCollection This is done at the beginning of the iteration through the myCollection, so if the myCollection is altered as in:
For Each itemChecked As Object In myCollection
CheckedListBox1.Items.Remove(itemChecked)
Next
The altering of the list returns the error:List that this enumerator is bound to has been modified. An enumerator can only be used if the list does not change.
[code].....
I had this little image file that i was working out for using in my program but after deleting the reference to it in the my project>resources tab and its gone from the saved folder and solution window, but...
it know has errors about it still having a link to that file but its now missing
How do I defocus a button after it has been clicked? Is there a something similar to "Button1.Defocus()" or "Button1.Focused = Fal
View 2 RepliesI am trying to write an application which will have different functions depending on someone's security level, but my bosses have ruled out holding a users name and password information in a database due to risk of the database being hacked.So I have decided to use USB flash drives, which will have encrypted datafiles on them, and each staff member will be given one with their details pre-programmed onto them.However I am now stuck with detecting whether the device is present or not, I have thought I can continually scan the available drives and have each flash drive with a set volume label and when it arrives act upon it, but I don't want to keep continually scanning the drives, there has to be a better way than this, .
View 7 RepliesI am attempting to detect addition/removal of volume media in a Visual Studio 2005 project. I can get this to work using the WndProc message WM_DEVICECHANGE on all types of volumes except SDHC (Secure Digital High Capicity) cards. Is there another Windows Message I have to listen for? If so, what is it, and what else do I have to do?
Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message)
Dim str As String
Dim devtype As Int32
[Code].....
I am creating a program in which there is a listview control with many items contained in it. It also has checkboxes for each of them. I am trying to get it so that when you check the checkbox next to an item, it removes the item from the list. I am using this code:
Private Sub ListView1_ItemCheck(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs) Handles ListView1.ItemCheck
ListView1.Items.RemoveAt(e.Index)
End Sub
When I run this however, and check an item, it gives me this error (I am checking the first item in the listview, which would mean the index is 0): InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index
I've have been testing this code out for both the listview events ItemCheck and ItemChecked. How is 0 out of the index range? Wouldn't it be the first item in the listview, in which case it should remove the item.
I am working on a parental control system for my webbrowser (checks if navigated page is on the blacklist). So I was looking for a list of sites to add to the system as default, I didn't find any but my friend did, but the problem is he gave me a list, for example, with lots of lines like this:
http:somename:something@website.com
http:somename1:something1@website2.com
How can I remove everything from the "@" till the "http;" (including http) and remove it all so only the website name stays? I could do it by hand/notepad, but it would take forever as the list has over 2k sites I would like to add in my blacklist! I thought maybe strings could do it?
Why is it that this VB.Net code only works for detecting flash disks? [code] What would be the possible way to detect the insertion and removal of other USB Peripherals such as mouse and keyboard?
View 1 RepliesI have inherited some very old ASP.Net code. Written initially in 1.0 and then converted to 2.0 There is a page which uses a custom pager control. That control has the following logic in it:
Private _DataSource As PagedDataSource
Public Property DataSource() As PagedDataSource
Get
[code]....
The task at hand was to remove all session variables. What would be the best way to represent this data without the use of session. Originally i was told to put all session items into a cookie, while this worked for most of the items it will not work for this due to the cookie size limitation, Im also not to keen on the idea of keeping it in ViewState or even if that is an option. Im very new to VB and dont have much expierence re-writting legacy code. Session is not an option because this is being moved into a web-farm and Sticky sessions are turned off so it must work without session.
the rules are that same coloured blocks of two or more can be removed by clicking on them. blocks then slide down from above. if a column is empty columns other columns move in from the sides.when someone clicks on the green blocks in the bottom row the columns should slide in from the sides. columns to the left of the black line slide right and on the right of the black line slide left. so in this case only the two rightmost columns should slide from the right to the black line after removing the green blocks.The problem i am having is in designing a suitable algorihm to do the collapsing after the removal. my current approach is to test each column from left to right to see if it is empty. if it is empty then i slide whatever column is to the left (if left of the black line) or to the right (if to the right of the black line) over the blank column and repeat this in the direct i am sliding from
View 1 RepliesHow do I write an expression to calculate all characters of each row by my own defined value to each character = all the A and B and C and etc. will be as 2 and all I and J and whatever ... will be 1 so I need an end result of the total.
View 3 RepliesI am working on a sub that essentially needs to open a text file, and replace all instances of a certain character with a unicode character. I'm trying to do this by reading the original text file byte by byte, converting it to a character, and then either adding that character to a memory stream or writing the unicode character to the memory stream. Then I'm saving the memory stream to the original file.
[Code]...
[Code]...
For each character of this string I want a new character out of the string and then remove the character from the list of characters that still maybe used for other characters. It may not get the same character, you could basically just call this encryption, but it's not what I am making. I don't want to waste my time doing this one hour while VB can do this for me in <1 second.
I am writing a hangman type game and I am displaying the word to the user in a label as all *'s, but I cannot figure out how to have just one of the *'s changed in the label to the correct letter when the user inputs the correct letter into the text box and clicks the check letter button.Everything else in the program works perfectly, except for this part.[code]When I use the .Replace it changes all of the *'s to the correct selected letter.
View 2 Repliesthe coding is to 'Get input string and put its character into List, and replace the character with other.'but having problem putting each character into List and also replacing it,[code]
View 2 RepliesI want to read a text file(.txt) character by character into a database.There are 28 characters on each line and I want to read the first 16 into a column in a database and the rest in another column in the database.
View 7 RepliesIn my VB.NET application I compare words that are recorded using IPA, many of which have many diacritic marks. In one of the comparisons, I compare the words character by character. But when I iterate over the characters, the diacritic marks come out as separate characters (as I would expect since this is unicode)However, a u character is different than a u plus an accent for the purposes of this program and needs to be distinguished.
View 1 RepliesI have a value I am pulling into a string that looks like this:
M'arta
I need to have it to translate the numeric value into an actual value so that the string looks like this:
M'arta
how to accomplish this in VB.NET? Here is the relevant line of code that returns this result:
Dim occupant as String = GridView1.Rows(e.RowIndex).Cells(2).Text
My form has a texbox where user enters an ID. IDmust be4 chracters in length andof the form: begins with either "E" or "e" and the next 3 chracters cannot be "all characters".
Example:
E102 - corect
e3ff - correct
[code].....
I want to read a text file(.txt) character by character into a database.There are 28 characters on each line and I want to read the first 16 into a column in a database and the rest in another column in the database.
View 17 RepliesI am trying to error check a piece of code
This is from my previous thread which 'Codeoder' help me on..
[URL]
I have a RTB which I import with a set of 7 or 9 didit numbers, 7 for Staff and 9 for Students. e.g. Staff numbers
0628189
0628191
0629991
[Code].....
I've been working with the substring command and after coding up all the things I needed it to do, I saw a post on here where the "For Each" statement was used basically to do the same thing.Lets say we just want to take a string apart one character at a time and add each character to a label. Which would be more efficient?I made a cheap example to show ...
Code:
ABinary = "0110 1100 0001 1011"
For x = 0 To Len(ABinary) - 1
[code].....
I want to create a file removal which revieve directory files to delete from a text file..[code]
View 2 RepliesI'm able to convert a character to its corresponding Character/ASCII code using "Asc(CHAR)". I can't find anything on converting this returned Integer back to its original Char form.
View 3 Replies
