Binary - Add Padding - Bit Shift Numbers
Nov 5, 2010
I have some questions regarding vb.net bit shifting. I understand the << >> operators are bit shift operators in vb.net. I have a two byte hex value 0x3ACC, each bit in this two byte represents either a day, month or year. The bit structure of this hex value is yyyy yyym mmmd dddd. I am confused as to how I should bit shift these values so that year, month and day are in their own UINT16 values. Just want to know about shifting numbers and if I need to add any padding to the shift?
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Nov 16, 2011
I just found an interesting problem between translating some data:
VB.NET: CByte(4) << 8 Returns 4
But C#: (byte)4 << 8 Returns 1024
[code].....
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Jan 10, 2010
How to hold shift and then click button a and b (while holding shift)?
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Dec 8, 2010
I'm looking to design a calculator that adds and subtracts binary numbers. I'm new to this program and stumbling on where to start?
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Dec 15, 2009
In my keydown event handler, when Keys.Numpad4 is pressed with Shift, I get the same keycode code as for Keys.Right. Is this by design? How can I distinguish between the two?
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Jun 13, 2012
I've used .NET for a long time now but I have come across something I haven't had to do before and I'm struggling to work it out. What I need to do is work with binary numbers and convert them to decimals and vice versa but not necessarily using even numbers e.g. I would like to represent a number between 0 and 2047 which can be represented with 11 binary digits. Plus I want to represent a second number between 0 and 500000 which can be represented with 19 binary digits, and a third number, fourth etc. Then I want to string the whole binary results together and split it in to sections of lets say 5 bits each and convert those back to decimal.
[Code]...
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Apr 28, 2011
I have a hw assignment and it asks this: program Description: Write a program that has four sub procedures that will calculate and print out a table of numbers 0 to 17 in decimal, hex, octal, and binary notation. Statements Required: output, loop control, subprogram
Sample Output: (you will design your own output but 4 adjacent label boxes would be suitable) [Code] What I want to know is how do I display my numbers from 1 to 17 as either Hex, Decimal, Octal or Binary. Also how would I display that on my form?
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Jul 20, 2009
I'm reading three bytes from a byte array. They are supposed to be the "Binary code of the e-card no". (e-card is a electronic card used for storing different information). Well, it works fine sometimes, and sometimes not.
[Code]...
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Jan 4, 2010
I need to document binary files containing integer and real numbers. I use BinaryReader, and BinaryWriter classes, with functions like ReadInt16, ReadSingle, or ReadByte. The files should be readable by any other hardware architecture/OS besides x86/Windows.
I need to document the type of default binary encoding, and can't find the MS documentation.The best I found says that it uses UTF8, but as I understand, UTF8 is for text formats, not for binary numbers.
I suposse that the answer I are looking for, is something like "little endian" or "big endian" format.
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Nov 11, 2009
I'm wanting to make a program that translates binary code into numbers/letters and numbers/letters into binary code. I know the general system of binary code, but I dont know how to translate anything with VB.net. Is there a general command I need to use or can someone link me to a good tutorial about translating?
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Jun 13, 2011
i m trying to write a program that displays in a textbox a table of the binary, octal, and hexadecimal equivalents of the decimal numbers in range 1-222.
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Apr 26, 2010
my program written by me can only perform properly if its in multiple of 8bits, but when it exceeds more than or less than 8 bits it doesnt perform the specified function. so i want to know how to do '0' padding if my file size is not in multiples of 8 bits.
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Apr 17, 2009
If a user enters less than the maximum limit of characters set for a textbox, how do u pad the textbox with xxxx when the user leaves the textbox. I've tried using the padright function but I can't seem to get it to work.
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Feb 25, 2009
I have a ListBox that I add items to using the standard:
ListBox1.Items.Add(whatever)
I would like to increase the space between entries, but not adding a blank line, since I do not want a blank option tha thwe user could click on. Is there anyway to do this?
I have tried:
ListBox1.Items.Add(whatever & vbCrLf), but no change.
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Aug 5, 2011
Does anyone know if it's possible to pad a column to the left using the RowFilter property in a DataView? My data comes from a third party via XML which I've converted to a DataSet. I'm inferring the XML schema to set the column datatype. I've converted the column in question to string in order to properly compare any text entered by the user. At the time I populate the data grid I format the column by padding it with zeros on the left side so that it is always 11 characters (Ex: 123456789 becomes 00123456789). This is for legal reasons and not optional. However when using the RowFilter property the zeros in front are obviously not accounted for because they don't exist in the DataSet.
This is what I'm doing currently:
[Code]...
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May 21, 2009
How do I set a Labels Padding Property dynamicaly?
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May 21, 2009
How can I set properties like the Padding and Location in code?
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Sep 7, 2010
1. How to get 0 padding/inner margin in the cells? I want just the border as a colored line at the next close pixel to the control in the cell. Or if border set to none, I want the controls with no gap.
2. How do I actually add/remove rows& columns? I thought this was by setting the .ColumnCount property, but if I set it to 3, and then try to access the third column, it gives exception, so it's obviously just two columns, although it also looks like 3 on the form. ? I created it in designer with 2 columns though. But I don't understand how this hangs together..
Dim z0, z1, z2 As New ZedGraphControl
z0.Dock = DockStyle.Fill
z1.Dock = DockStyle.Fill
[code]....
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Jul 15, 2011
I was using System.Windows.Forms.TabControl to list custom pages, but there seems be a Hardcoded Padding of 3 pixels on all sides of Tabcontrol. How I can remove that. One point here is I dont want to remove Tabs on Top http:[url].....I found above MSDN link whick does removes margins from all sides including TabItems on top which I dont want.
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Apr 23, 2010
I have been writing a security class in my application, I am able to encrypt the string correctly and without error. However every time when I try to decrypt this string again, i get an error with this as it returns the following Padding is invalid and cannot be removed.
Here is the code:
Public Function DecryptKey(ByVal plainText As SecureString, ByVal key() As Byte, ByVal iv() As Byte) As SecureString
Try
[CODE]...
And it provides a stack trace with:
at System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast)
[CODE]...
I have found simular issues on web, and most of them say that the IV is not the same the encrypted version, but I can confirm that the IV is the same as they both access the exact same variable.
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Jul 13, 2011
decryption error : Padding is invalid and cannot be removed.
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Oct 18, 2010
I use the following code to initialize encryption...
[Code]...
So I don't think there is a method for PKCS5. Is there any way to add it, or do I need to write an encryption method myself? If so - how do I write that? Is there a reliable DLL that will support it?
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May 3, 2012
While I am asking this for VB I verified this issue also occurs in C# so I think it is a .NET issue. I am using Visual Studio 2010 Premium Version 10.0.40219.1 SP1Rel with .NET Version 4.0.30319 SP1Rel.
Step to recreate the problem.
Create a new Windows Application for Visual Basic (WinForms).
Add a ToolStrip.
Add a ToolStripComboBox to the ToolStrip.
Save, note the width of the combo box.
Change the padding on the combo pax to 2.
Save and close the form designer.
Reopen the form designer, look at combo box width - it decreased. Note that form is marked as having been modified. So save it and close the designer again. Reopen the designer and look at the combo box width - it will have shrunk every time you save, close, and reopen until you get to a 0 width. It shrinks by 4 * the padding size. Why would padding affect the size since that is the interior margin where as the margin settings are the exterior margins.
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Mar 19, 2012
I am using RijndaelManaged to encrypt just 4 bytes of data which produces a 16 byte result (i am using a 128 block size). When I try to decrypt these 16 bytes I get the message "Padding is invalid and cannot be removed.". (The base stream of the CryptoStream is a MemoryStream based on just these 16 bytes).
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Nov 19, 2011
If you have a Control contained within another Control and the Child Control has the default Anchoring (Top + Left) AND AutoSize=False (Assuming the control has that Property) changing the Parent Control's Top or Left Padding will not offset the Child Control.If you change the Anchoring of the Child Control to anything other than the default values OR set AutoSize=True, the Control is correctly offset when the Parent Control's Padding values are changed.
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Dec 29, 2010
I need to take a string of any length & make it exactly 5 characters long by either truncating it or padding it or neither. So "abcdefgh" becomes "abcde", "abcde" stays "abcde" & "abc" becomes "abc " (2 spaces at the end).
I currently use this line of
Microsoft.VisualBasic.Left(myString, 5).PadRight(5, " "c)
it works, but it seems very hackish.
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Apr 4, 2012
Is there any way to push the left padding on a multi-line text box to the left to be in line with the left justified padding on a single line text box? It is frustrating as it looks off-kilter with the multi-line text indented as it is.
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Dec 17, 2009
How to format by padding left and right. I have two integers, two strings, and another integer that I need to align neatly in columns. There is a total of about 100 columns, and they have to be neatly aligned.
Here is my code:
Console.Writeline(num1.ToString().PadRight(5) + num2.ToString().PadRight(5) + str1.PadLeft(20) + str2.PadLeft(20) + num3.ToString().PadRight(5))
How do I pad it correctly so the columns can be neat and aligned.
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Nov 11, 2011
I'm using VB2008 Express. And I've been working on a "popup" to select a date range. The DateTimePicker isn't ideal because the purpose is to pick a date range, which will always be one full week, from Sunday through Saturday. The control works just fine and I'm pretty proud of it. My problem has to do with the border added when using ToolstripControlHost for this. I've included a screenshot and my code.
In the code below, assume there exists a button named "btnTimePeriod", below which I desire to show a panel, which contains a few custom items, and the panel's name is "pnlDateRangePicker".IT WORKS... but it doesn't look right. The panel itself is 147 x 326 pixels, but notice in the attached graphic that it's adding a border around the panel which I don't want. There's a border on the top, bottom, and left... but for some reason the border on the right one is especially large. Although my code doesn't expressly set it, AutoSize = true so I would have expected it to shrink around the panel.
As required, my code already does set ShowCheckMargin and ShowImageMargin false. I haven't included the code for the DrawDateCalander Sub because it's not relevant. I believe even a blank panel would yield the same result. I have no idea where this margin is coming from.
Private Sub btnTimePeriod_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTimePeriod.Click
Call DrawDateCalendar(DatePart(DateInterval.Month, FirstDisplayedSunday), DatePart(DateInterval.Year, FirstDisplayedSunday))
Call ShowControlBelow(btnTimePeriod, pnlDateRangePicker)
End Sub
[code]....
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Apr 28, 2010
By default, the DataGridView padding (.ColumnHeadersDefaultCellStyle.Padding and .DefaultCellStyle.Padding) is set to 0 (zero). However, when you run the application and look at what's in the DataGridView control, there is default padding of 3 pixels (Left) in the data cells and a default padding of 7 pixels (also Left) in the header cells. I don't seem to have any control over these 3 and 7 pixel offsets. For Top, Bottom, and Right, there are similar or greater pixel offsets that I also don't seem to have access to. I want to be able to specify exactly the pixel offset I want, assuming a default pixel offset of 0 (not 3 and 7).
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