I've done some searching on these forums as well as on the Web in general, and while I've found some posts about the error above, I haven't seen anything specific to what I'm experiencing
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Ok, so I got everything working except for one thing. My program stores text in a settings files (which it saves to and encrypts to wonderfully), but it will only work once. For example, I type in an author, title and body, and click Publish, it publishes and is labeled with a "1.". Restarting the application, you get the desired effect, a decrypted string from the encrypted settings file, now publish another entry, this makes a new line with "vbNewLine" and then encrypts it, fine and dandy. Now apon opening the application again, you get an error stating "Invalid character in a Base-64 string.". What do I do?
Encryption Code:
Public Function psEncrypt(ByVal sInputVal As String) As String
Dim loCryptoClass As New TripleDESCryptoServiceProvider
[code].....
I have a .dat file with base64 encoding. I am trying to decode it with this:
Code:
Dim b As Byte() = Convert.FromBase64String(System.IO.File.ReadAllBytes(Application.StartupPath & "libdata emplatelua.dat").ToString)
finalize:
Code:
System.Text.Encoding.UTF8.GetString(b)
but it give me an error. "Invalid character in a Base-64 string."
base64 code:
[code]...
what am i doing wrong?
I 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.
i have a password generator and am trying to improve it by adding checkboxes for the diffrent character types eg ABC, abc, 123 , @~}
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
where I was encrypting the string and passing it to another web page to decrypt and get the ids to be displayed as a pdf back to the page. I kept getting an invalid "Invalid length for a Base-64 char array". It was then I realised that the string was getting truncated and that the IE Explorer had a size limit for the number of charaters being passes as a querystring.So I think I need to go the route of posting it.But not sure how to go about it.
Private Sub GetReport()
Try
Dim hawbs As String = String.Empty[code]....
The retrieve document then does: the decrpytion gets the data(ids) and pulls the pdfs.
Relating to another question I asked yesterday with regards to logging I was introduced to TraceListeners which I'd never come across before and sorely wish I had. I can't count the amount of times I've written loggers needlessly to do this and nobody had ever pointed this out or asked my why I didn't use the built in tools. This leads me to wonder what other features I've overlooked and written into my applications needlessly because of features of .NET that I'm unaware of.
Does anyone else have features of .NET that would've completely changed the way they wrote applications or components of their applications had they only known that .NET already had a built in means of supporting it?
It would be handy if other developers posted scenarios where they frequently come across components or blocks of code that are completely needless in hindsight had the original developer only known of a built in .NET component - such as the TraceListeners that I previously noted.
This doesn't necessarily include newly added features of 3.5 per se, but could if pertinent to the scenario.
Edit - As per previous comments, I'm not really interested in the "Hidden Features" of the language which I agree have been documented before - I'm looking for often overlooked framework components that through my own (or the original developer's) ignorance have written/rewritten their own components/classes/methods needlessly.
My program gets an encrpyted query string ,decrypts it and then pulls the pdfs in a popup window depending on the values in the string. The issue I am having is I have around 500 ids that I am passing whose pdfs need to be generated, but I keep getting the "Invalid length for a Base-64 char array".
Not sure what I need to do, I have read through the solutions and have done whatever has been said, with replacing the blank with the "+" but I cannot get this to work.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
_CurrentProcName = "Page_Load"
[Code].....
I am looking at adding in some bluetooth functionality to my vb.net application. I require it to couple with a specified mobile phone (that is found by the app) than to be able to retrieve contact information, phone calls (made and recevied) and images from the phone.
Can anyone tell me what my best approach will be for this? If there are any good third party solutions that will do it? If it is actually doable? Im thinking that it should because im basically mimic'ing what all the new fancy cars do with their bluetooth phone compatibility.
I'm writing a program and it's got a textbox for the user to enter values. Since the textbox text property should only be a "number", my program need to detect invalid charaters like "*/&()$" and tell the user to only enter a number. Does anyone have an idea how to do that?
View 6 Replies[URL]. Attached is a MEF WPF and WinForms project that I have been playing around with. I was able to add two 'plug-in' buttons to the form but how do I provide functionality to the buttons? How can I add objects from a separate assembly, like most plug-ins do? Let's say I want to break out each menu (File, Edit, View, Tools) into their own assemblies, leaving the main application window as a blank form that will import each assembly on startup. Also, could functionality from the Edit menu assembly interact with the code from the File menu assembly? I have also not created custom user controls before so as you can see I am having trouble creating a plug-in menu structure.
View 10 RepliesI have been building a Web Application (ASP.NET, .NET Framework 4, VB, visual studio 2010). To be very brief the application interacts with a database and performs several actions (Insert Delete Select etc..).I am using several Gridviews, ListBoxes etc and I am not happy with the presentation outcome and the functionality provided by asp.net. In simple words my application looks bad, outdated and unprofessional.I figured that using Windows Forms that will be incorporated to the ASP ap.I have created a Windows Form Control Library to use the dll created in my app as a user control. I found out that this is not supported in .NET Framework 4 (is this true? or am i doing something wrong?). Is there any way to make my application have the 'look and feel' of a windows application? Please note that it is has to be a web app and the clients should not have to download any other application to interact with the server.
View 2 Repliesi try to use compactdatabase with an MDb created with dbversion30 and dblangarabic procted with a password.i receive always invalid password 3031.
someone can send me the syntax exact to avoid this error.
for information im using VB 6
I have a project where I added visually and successfully a datasource of MySql. I binded a datagridview with a table.
But, how do I change programatically the password, ip or user to connect with the MySql server? Because it can change at any time, so I can let the user change these values.
I am getting the following error:
' ', hexadecimal value 0x1F, is an invalid character
Here is my function. I get this error when it hits "reader.MoveToContent()" for the first time. Can anyone point me in the right direction?
Public Function GetSyndicationFeedData(ByVal urlFeedLocation As String) As SyndicationFeed
Dim settings As New XmlReaderSettings() With { _
.IgnoreWhitespace = True, _
[code]....
I'm performing an XML.save(filename), but when an invalid character is present, it fails with this error:{"'', hexadecimal value 0x07, is an invalid character."} [code]I've tried playing around with the XML encoding but nothing seems to help.I need to have this data saved, even though its a bunch of odd characters.
View 2 RepliesI need to add cut, copy, and paste functionality to my word processor. I'm using Visual Studio 2010 and we have no textbook this semester. I know they're in that tool box somewhere!
Public Class wordProcessorForm
Dim mblnDirty As Boolean
Private Sub wordProcessorForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
I have a couple of textboxes on my form. I'd like to give the user the opportunity to spell-check these textboxes so that they can correct their mistakes and then update the contents of the textbox into the database.
Only thing is, I'm not sure where to begin. I found this thread by Martin Liss, but it errors out for me as it's not .NET.
[URL]
I'm trying to create a password change form for my company's vendors. There are a couple of scenarios I could encounter doing this:
1 - User enters invalid current password
2 - New passwords do not match
3 - User's account is locked
4 - User cannot authenticate because password is expired
It's case 4 that I'm struggling with, because their is no way for me to take the password the user entered and verify it against active directory without getting an error.
Add Query To Show Invalid Username Or Password?
Public Class Login
Dim cn As OleDbConnection
Dim cmd As OleDbCommand
Dim dr As OleDbDataReader
Dim str As String
[Code]...
Public Shared Function GetData(ByVal id As Integer) As List(Of SomeClass)
Dim command As New OracleCommand
Dim conn As New OracleConnection(WebConfigurationManager.ConnectionStrings("ConnectionString").ToString)
Dim param As New OracleParameter
[code]....
This function is giving an ORA-00911 invalid character error. I have other methods of the same style and these are functioning correctly.
What is the code in creating a program that enables the built in web camera of the laptop when an intruder input a wrong password in the windows logon screen?
View 1 RepliesI am having a small problem with dataset. problem defination is:
System.Data.OleDb.OleDbException was unhandled
ErrorCode=-2147217843
Message="Not a valid password."
Source="Microsoft JET Database Engine"
And My connecting string is:
"Provider=Microsoft.Jet.OLEDB.4.0;Data Source="D:Shop InventorydatabaseDATABASE.mdb";Persist Security Info=True;Jet OLEDB:Database Password=123456789"
WHERE the password I added is rightbut whenever I try to access is it shows error of Invalid Password;
I have coded it as:
'Me.SaleTableAdapter.Fill(Me.DATABASEDataSet.Sale)
Me.ReportViewer1.RefreshReport()
I am having a problem writing a string like a word "Zürich" the output became "Z�rich"
I am using StreamReader and StreamWriter.
Code: below
Imports System
Imports System.IO
Imports System.Text
Module Module1
[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've written up the following code (please note i only started to learn VB yesterday)
CODE:
And what I want it to do is when a letter, or character, is entered, i want to have Label1 display "invalid" but i cant seem to figure out how...
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 need some guidence regarding password character.if in a text box we give * as the password character then it shows * irrespective of what we type..thats fine..i needed to develop something diffrent
View 2 RepliesI'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].....
