Check Byte Data Of A Registry Value?
Feb 18, 2010How to check the data inside this value anyone ?
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Check Packet Size Of TCP Data Before Reading Next Byte In Stream
May 25, 2009I am sending data to server via TCP IP Connection. I am using a continuous loop at the server end - that accepts new clients and while streams can be read, it reads data stream.
The data is sent from the client with 2 leading bytes of data that represent the size of the packet of data sent and type of data.
My question is: how do I retrieve the size of the data packet and then check that this amount of data has been retrieved?
[Code].....
Check Packet Size Of TCP Data Before Reading Next Byte In Stream?
May 25, 2009I am sending data to server via TCP IP Connection. I am using a continuous loop at the server end - that accepts new clients and while streams can be read, it reads data stream.
The data is sent from the client with 2 leading bytes of data that represent the size of the packet of data sent and type of data.
My question is: how do I retrieve the size of the data packet and then check that this amount of data has been retrieved?[code]...
Check If Data Already Exist In Registry Value Or Not
Jan 22, 2010I created a form with a checkbox and my purpose is if data have already existed, the checkbox will show a check when it launch however i am very new to VB( First time actualy). i google to find the answer but the best solution just tell me to use RegQueryValueEx, unfortunately,i don't know axactly how.
View 12 RepliesTruncating Data Types From Int To Byte, Transferring 8 LSBs To The Byte?
May 16, 2011Is it possible in VB to truncate a larger data type ( an int with a value greater than 255) to a smaller one, say a Byte (which only goes up to 255) in a way such that the 8LSBs of the integer are copied to the newly created byte. I have tried this using CType with the following code, however it does not work.
Dim TestByte As Byte = CType(Test, Byte)
Where the variable "Test" is an integer with a value of 419. This code always results in the Overflow exception.
[code].....
Why Does C# Define Byte+Byte=Int32 Instead Of Byte+Byte=Byte Like VB?
Aug 7, 2010Why does C# define Byte+Byte=Int32 instead of Byte+Byte=Byte like VB?
View 1 RepliesFile I/O And Registry :: Safe A String Or Byte-array To File In Utf8 Format?
Sep 4, 2008trying to find a decent answer for my question; I do have a utf8 file which I (down)load, manipulate and wanting to save back again.The result always is that the file I produce is not in utf8 format;
Dim fs2 As New FileStream("c: est.dat", FileMode.Create, FileAccess.Write, FileShare.None)
Dim w As New BinaryWriter(fs2, Encoding.UTF8)
[code].....
Check For Registry Changes?
Dec 7, 2010Is there an easy way to check for a change in the registry, i.e an application has been added to startup in the registry or a key/value was changed?
View 2 RepliesCheck If Registry Key Exists?
Feb 23, 2010I need to figure out if a registy key exists under the HKCU hive. If the key exists do this, if not then this.
View 6 RepliesCheck To See If Registry Key Exists
Sep 15, 2006I am trying to figure out how to check if a registry key exists. If it does, do nothing, if it doesn't, recreate it.I've found numerous resources on the subject, and have made progress, but one little thing is stoping me.[code]The problem is that this reports "Not Found", even though the key 'regkey' exists in the registry. Also, if I remove 'regkey' from the code, it reports "Found". So it does find the subdirectory in the registry.My question is, how do I check to see if the 'regkey' exists? I'm running Windows XP Pro SP2.
View 19 RepliesCheck If Registry Folder Is Deleted Or Not?
Dec 26, 2011I have created a folder and a sub folder within it and trying to check if the folder exists or not in the registry editor.This is how I have Created:
Dim kstrRegSubKeyName As String = "CompanyName\SoftwareName"
Dim oReg As Microsoft.Win32.RegistryKey
oReg = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("Software", True)[code]....
Now I need to check if that CompanyName Folder is deleted or not and display a message.
Registry - How To Check If Node Exists
Oct 12, 2011I know what instruction to use to check a subkey exists within a node, I can't find how to get VB.Net to check if a node itself exists. Besides the standard My.Computer.Registry.GetValue(), this page mentions using "Imports Microsoft.Win32" followed by "registryKey.OpenSubKey" to check that a subkey exists, but is there a way to check that node exists?
View 1 RepliesVS 2005 - Check For Registry Subkey?
Sep 9, 2009I need to check for a registry cubkey I know how to check for an empty value but not if the subkey is missing In particluar this key
[code]...
here is code that i have for checking an empty registry value for instance a registry value named run. So if the key RUN has no value it returns true on the checkbox. Im not sure how to modify this code to check for an entire subkey as there is other subkeys where the one above is contained.
[code]...
Check The Registry Permission Of Subkey Programmatically?
Jan 25, 2009I want to check the Registry Permission of Subkey programmatically.Whether the Subkey has Read permission,Write Permssion, Delete Permssion.
View 1 RepliesFile I/O And Registry :: Check If Folder Is Writable?
Oct 25, 2008I want to save a bitmap object to file, but I want to make sure the file path is writeable first. The user should have write permissions to the folder and it should not be a location on a CD drive.Right now, it gives a "A generic error occurred in GDI+", which is not too helpful. I'd rather tell the user that the selected save location is not writeable.
View 6 RepliesUse VB To Check Folder Locations And Registry Entries?
Apr 6, 2011I want to create a simple program that runs in the background that every few minutes checks to see if any additions to the "startup folders and or the registry entries that run programs. How do I make the value of these folders or registry entries variables?
View 1 RepliesByte() (System.Byte[]) Versus Binary (System.Data.Linq.Binary)?
May 1, 2009i have a table in sql server with some fields set as Byte() (System.Byte[]) when i import them in my application to be used with linq they are converted in Binary (System.Data.Linq.Binary)why is that?is there a way to prevent this wrong translaton???if i update the database how can i update the classes that has been craeted in visual studio2008?
View 2 RepliesCheck Local Format On Form_load And Change It To En-us Via Registry If Any Other Is Preset?
Feb 19, 2011Is it possible to check locale format on form_load and change it to en-us via registry if any other is preset?
View 5 RepliesVS 2008 WPF Registry Edit Auto-Start // Check Admin Privileges?
Apr 29, 2011I'm having trouble getting my app to auto-start by adding a registry key. The problem it is having is checking if the user has admin privileges. I tried setting the thread principal, because before it would always return false when I tried My.User.IsAuthenticated, but when I check if My.User.IsInRole("Administrators"), it still returns false, even when it should return true.Here's my current code. This worked fine without even setting the thread principal when I was just creating a regular Windows Form.
AppDomain.CurrentDomain.SetThreadPrincipal(New Security.Principal.GenericPrincipal(New Security.Principal.GenericIdentity("UserName"), Nothing))
If My.User.IsAuthenticated Then
[code]....
Search Data From Database With Some Check Box And Text Box When User Select Check Box Specific Function
Dec 15, 2011My application is like this : i have to search my data from database with some check box and text box when user select check box specific function go on and then when user enters some range of value in textbox then the result will shown in data grid view after that i can print it by selecting data
my vb.net code is as follow:
Imports System.Data
Imports System.Data.SqlClient
Public Class XtraForm1
[CODE]............
I m also pasting the demo picture.
.NET Data-type Smaller Than A Byte?
Jul 9, 2010How about a Nibble etc.
View 3 RepliesLoad Byte Data To A Picture Box?
Jul 29, 2011I have saved an image in database using following code.[code]...
But it says can not convert Byte() to string.
Loading Byte Data To A Picture Box?
Jul 29, 2011I have saved an image in database using following code.
ofd.ShowDialog()
vrPicHolder = IO.File.ReadAllBytes(ofd.FileName)
Dim drPic As DataRow
drPic = DsPic.tblPicTest.NewRow
drPic.Item("Picture") = vrPicHolder
[Code]...
Store Data (Hex Value) In Byte Variable
Dec 2, 2009Try to store hex value D9 to byte variable.
Dim x As Byte
x = encText.GetBytes(&HD9)
When Debug.Print for check, answer show hex 83 (decimal 131). Why it cannot store correct hex value?
Combine Byte Arrays, Read Specific Sections, And Then Cut Byte Array At Specified Point?
Apr 6, 2011Objective: Combine byte arrays, read specific sections, and then cut byte array at specified point.
Private Sub DataArrival(ByRef aBot As xyzSocket, ByRef theData As Byte())
Dim RDLength As Int32
If aBot.ReceivedData Is Nothing Then[code]....
I'm not sure if I have this right to begin with because I can't test it without having it completed.
MyAlgorithm - Encrypt And Decrypt Byte By Byte And Place A Asci Code In Bytes(0 To 255)
Dec 18, 2010I create my algorthm and its finished but there is a problem, it encrypte all text and all text in a file but after decryption when i open my file (a video file)the player show all information about file(duration,size and ect) currectly but it dont play that my program encrypt and decrypt byte by byte and place a asci code in bytes(0 to 255)
View 12 RepliesChange Byte() To Structs For Readability And Convert Struct To Byte Stream For Socket Send()
Dec 8, 2009I just converted the following code from c# to vb.net. It is functional and works correctly with my company's firmware/devices. My next challenge. Previous serialport code used much more readable structs which where then converted (after building a packet) into byte() automatically as part of the serialport encoding. (this is my understanding)How could I
1. morph byte arrays 'ToSocket' and 'ToMTP' below into structs and
2. convert into byte array for Socket.BeginSend(byte(),.....) to stream out to remote devices?
Imports System.ComponentModel
Imports System.Text
Imports System.Net.Sockets
[Code]....
Error: Value Of Type Ƈ-dimensional Array Of Byte' Cannot Be Converted To 'Byte'
Jul 13, 2012how to upload file using fileupload control into sql database. I have class where i created insert function and getting info frm the .aspx.vb file
Class File
========
Imports System
Imports System.Data
Imports System.Data.SqlClient
[coe]....
C# - Conversion From VB6 String Data To .NET Byte Array
May 7, 2009I'm writing a C# application that reads data from an SQL database generated by VB6 code. The data is an array of Singles. I'm trying to convert them to a float[]
Below is the VB6 code that wrote the data in the database (cannot change this code):
Set fso = New FileSystemObject
strFilePath = "c: emp emp.tmp"
' Output the data to a temporary file
[Code]....
The problem here is the VB6 binary to string conversion. The VB6 string char is 2 bytes wide and I don't know how to transform this back to a binary format I can handle.
Below is a dump of the temp file that the VB6 code generates:
And here is the dump of the data as I read it from the database in (=the VB6 string):
Loading Byte Data From Database File?
Jul 29, 2011I am using following code to get data from database and load to picture box
Dim vrPicFromDB = IO.File.ReadAllBytes(DsPic.tblPicTest.Item("Picture"))
Dim ms As New MemoryStream(vrPicFromDB)
PictureBox1.Image = Image.FromStream(ms)
It gives error on DsPic.tblPicTest.Item("Picture")) portion of the statement.
I also tried
CByte(DsPic.tblPicTest.Item("Picture")))
but it gives the same error.