I have been using this code for a long time now and it has always been accurate. I recently tried to convert a large string from one base to another and some weird stuff happens.
When I convert from base 36 to base 10, the result is accurate. When I convert the result back to base 36, it becomes inaccurate.
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Are there any built in base number conversion functions in .Net specifically decimal to hex?
View 7 RepliesI was going to build a complex key value and wanted a "counter" like sequential value within it.Then I realized I could "shorten" the length if I used base 64 encoding.I saw something about converting byte arrays to base 64 - but that's not what I'm looking to do.So how to convert a number like 123456 to base 64.
View 24 RepliesModule Module1
Dim Bf, Bt, Lgt, Total, Pwr, Valu, Val2 As Integer
Dim InNum, Temp, OutNum As String
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I, will just explain a few areas of this to ease the process of understanding it:
1-The conversion Subs are to be used for values such as A7 in Hexadecimal
2-The Err Boolean will hopefully be used to link back to the top in the event of an error
3-Apollogies for the abreviated variable names, it simplifies things in my mind but winds my fellow students and teacher up no end.
This code is not fully functional yet, however I believe it should give an answer for my test value of 800 Base 10 to Base 8 (1440), however when the program runs in debug mode I can enter the three inputs but then it leaves two lines and gives an unresponsive flashing cursor.
below is my code, i want to get a record base on a specif invoice number?
Imports System.Data.Sql
Imports System.Data.SqlClient
Public Class Invoice
Private Sub Invoice_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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I'm looking for a decimal to alphanumeric number base converter library in Visual Basic that does not use recursion. [url]...
which includes a demo app but discovered that it uses recursion. The problem with it using recursion became apparent when I attempted to integrate the library into my own Visual Studio Express 2010 Visual Basic project: I got a stack overflow exception.
Now I could consider increasing the size memory allocated for the stack but it might be hard to determine what this would be, given that the recursion depth might vary depending on the value to be converted.
How do you convert a number as text from 1 to 001----Then 10 to 010 and 20 to 020 all the way until 99 to o99. All final numbers must be 3 Digits (data type Text)
View 4 RepliesI have a string such as
Dim my_sum As string = "100*10-5"
but when i do this:
msgbox(mysum)
it will output "100*10-5"
but i want it too output it so it works the sum out which should be 995
I am totally new with VB.NET. I have started coding for Modbus protocol. The response that I receive from the slave is as below -
01 = byte slave id
03 = byte function code
04 = byte -no. of bytes sent by slave
00 = byte(8 bits) (Lower Register MSB)
00 = byte(8 bits) (Lower Register LSB)
64 = byte(8 bits) (Upper Register MSB)
00 = byte(8 bits) (Upper Register LSB)
2bytes for crc
Now I want the value of 64 00 00 00 into floating point number in Vb.net . I think in vb.net its single as its 32bit floating precision number. Now the bytes that I need are 00 64 00 00 but if i process in this way the output is different, so I tried manually putting the data into the byte array and found out that I need 64 00 00 00 to be processed so that i can get desired output.
colordialog1.color will yield "Color [A=255, R=95, G=33, B=222]", but i would like to return an integer like 2349821 instead. how is this possible?
View 2 RepliesThis is more of a curiosity question on what the VB compiler is doing. Basically the following code generates an error,
If "String" = CInt(1) Then
End If
As it should. What makes me curious is the error reported is
Conversion from string "String" to type 'Double' is not valid.
So, I guess my question is, why is the compiler attempting to convert to a Double when I would assume it should be converting to Integer?
i want to convert following number to character equivalent but without using any special character.
View 1 RepliesI am getting following error when I am trying to use Convert.FromBase64String "The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters."
Dim payloadBytes = Convert.FromBase64String(payloadBase64)
Basically when my facebook registration form [URL]mphone field has a dash in it and encoded string is posted to other page and I am trying to decode it there which creates this error. Basically I am trying to extract data from Facebook Signed Request.
How do i make the connection between visual basic and open office base, I can only find tutorials showing how to connecting to access.
View 1 Replieswell my project is to do a BD with search and a popup or text box as remember cause i have "date" as field ... well i have done with success the DB and the search field but i dont know how to do th "remember + popup/textbox"
View 9 RepliesI have a base class, with a const giving its name. If I inherit that class, how can I override the const to give the name of the new class?E.g. (and I know this won't compile!)
Public MustInherit Class BaseClass
Const ClassName="BaseClass"
Public Sub DisplayName
MsgBox(ClassName)
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What I want is for class One to display its own name, not that of the base class.
How to allow duplicate,orif I enter a duplicate, to display Msgbox.
View 2 RepliesI can quickly knock together soem code to xlate base 10 to/from bae 13, but I just wondered if something very easy already exists in VB.NET (or even somethign generic, with base N, but right now I am only looking at base 13)
View 1 RepliesVS 2010 Adding whole numbers between a number and a number
View 3 RepliesI am trying to follow this thread
[URL]
and I have it pretty close but have one error.
Quote:Handles clause requires a WithEvents variable defined in the containing type or one of its base types.
That error is on both of these, in blue
Private Sub SpellChecker1_DeletedWord(ByVal sender As Object, ByVal e As NetSpell.SpellChecker.SpellingEventArgs) Handles SpellChecker1.DeletedWord
'save existing selecting
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I have added the reference, I have also added them to the toolbox. My dictionary is all set. What did I miss?
I have 3 textboxes in where RGB colors are added. Now I've added an extra for HEX color. When I tried to convert the 3 textboxses to HEX I found that the output is wrong. Seems I'm doing something wrong.
Dim conv2hex As String = System.Drawing.ColorTranslator.ToHtml(Color.FromArgb(color_map_txt_r.Text & color_map_txt_r.Text & color_map_txt_r.Text))
color_map_txt_hex.Text = conv2hex.Substring(1)
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The correct conversion would be: a90266, but the result is: 155111..
When i use my UserControl in a project my Mouse Enter & Leave events aren't firing, i assume i fix this with a raiseevents in my usercontrol. However when i try to do this it says something about "cannot raise base event from derived class".
View 7 RepliesI'm creating a simple personal calculator, it only has 1 textbox and 1 button.my code is:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Text = Val(TextBox1.Text) * 6.2
End Sub
I'm trying to convert some of my code from EXCEL VBA code to VB.net. However I've been encountering some errors and can't seem to get to display the output correctly.Below is my sample text data:
Date Time SYSID LPARBSY MVSBSY INRDYMX INRDYAVG INRDYQ(%) AVG_PROCS
---------- -------- ----- ------- ------ ------- -------- --------- ---------
03/18/2012 09.00.00 CP1A 11.97 12.03 3 1.1 99.0 2.0
03/18/2012 09.00.00 CP1B 8.86 9.12 3 1.1 99.3 2.0
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as i learn VB 2010 express, i want to try some serial communication and i found this code for VB6..but i have no idea how to make it work in VB2010?
Private Sub Form_Load()
MSComm1.RThreshold = 44 'transfer data into VB program only after receiving 44 characters into buffer
MSComm1.InputLen = 0 'i think only for receive data & not for sending data ...check
MSComm1.CommPort = 1
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I have eight text boxes each can have any numerical value only consisting of the numbers 1-8 up to eight digits each. No 0's or 9's. I am using a timer to loop through the sequences of text boxes at a given rate. This is already configured.
Now here's the hard part so bare with me.I need to output the first value of a text box, wait some time then output it's counter letter (below the number on the keyboard), go to the next text box and repeat. Example:
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Ultimately I'm trying bring my PC Interface project up to date by going from a parallel port to USB. This will be the "Custom Loop" function for the device.
i am creating a temperature conversion tool with vb 2010. i am trying to use radio buttons to choose the type of temperature that i am converting to and from.
Option Strict On
Public Class project
Private Sub txbInital_TextChanged(sender As System.Object, e As System.EventArgs) Handles txbInital.TextChanged
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Programming Applications Office Outlook 2007.This publication comes with sample VB code which I have dowloaded and am attempting to run.The code was written using VS2005 and I am using VS2010.The Upgrade conversion works ok and the project loads - however I get the following errors when I try to build:Does Microsoft have a fix? I only get thousands of people asking the same question when I search!!
ErrorAn error occurred while validating. HRESULT = '80004005'C:Documents and SettingsMartinMy DocumentsVisual Studio 2005ProjectsSampleCodeVBSampleCodeSetupVBSampleCodeSetupVB.vdprojSampleCodeSetupVB
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I am working on a project where I want to convert all the mdb files in a folder to xls files in C# or VB. Here user will select folder and then all the mdb files in that folder should get converted to excel files having same name. Also mdb file can contain many no. of tables and and I want each table in mdb file must be converted to different sheet having same name as that of table.
View 2 RepliesI am trying to convert text in a text box (txtEventDate.Text) to a date type in a structure: ThisEvent.EventDate (declared as date). The text in the textbox is of the form: 05/18/1927 (i.e. May 18th, 1927) and after looking long and hard thru the forums attempting several different things, like:
'ThisEvent.EventDate = CDate(Format("#" & txtEventDate.Text & "#", "mm/dd/yyyy"))
'ThisEvent.EventDate = Date.Parse(txtEventDate.Text & "12:01:00 AM")
'Date.TryParse(txtEventDate.Text, ThisEvent.EventDate)
The code is commented out because none of them convert the string to a date value (I know a date does not have a format and I have looked thru the MSDN). How can I stay logged and composing a thread past some arbitrary time limit that forces a re-login?