I have come across some Base64 conversion functions in .net(FromBase64.string etc). What i want is, for a sample, i have a base 64 encoded string as
"48YwojCi4yaiow==".
I need to convert this string to the corresponding Hexadecimal text(The sample stands for "Thisistest" in hex text) The below link is an online converter from base64 to hexadecimal text. If you give the same base64 encoded data in the link , click on convert, the one that is seen below "Hexadecimal text" is what I need.
[URL]
Is there a standard library function in vb.net which does this? Converting a base 64 data to a hexadecimal text?
Question: In order to store logos in a database and display them dynamically in ms-reporting service, I need to base64 encode the image. It doesn't work with binary saved images, due to MS limitations...
Now my question: Which datatype do I use? Varchar, nvarchar or text? I guess varchar would be good enough, since base64 encoded, but images might be larger than 4000 characters...
I need to Base64 encode a string, but the encoded string cannot contain "+". Wikipedia mentions a modified Base64 for URL, but I can't find a .NET class which uses this.For my application, I can't even URL encode "+" into "%2B". This is because I pass the encoded string to a service which I have no control over, and that service mangles any strings which contain "%2B". For this reason, I want my encoded string to only contain A-Z, a-z, 0-9, -, and _.
I have a Form with 4 Text Boxes, 1 label and one button. What I need to do is: Make all the text boxes and label only except Hexadecimal inputs.when I press Button1
Label1 = TextBox1 AND TextBox2 ^ TextBox3 MOD TextBox4
Once again every all the numbers are in Hexadecimal format.
So I've been going around the internet looking for a way to convert regular text(string) into base64 string and found many solutions. I'm trying to use:
Dim byt As Byte() = System.Text.Encoding.UTF8.GetBytes(TextBox1.Text) TextBox2.Text = convert.ToBase64String(byt)
but it end up with an error saying
'ToBase64String' is not a member of 'System.Windows.Forms.Timer'.
I am trying to convert a TIFF image to a base 64 string.I have seen so much code on the internet like the one below, but I don't understand it .I dont know what to change so it converts my image(s).I want the outcome (the bytes) as a variable that I can use outside this function. Know how to do that?
Private Function BytesToImage(ByVal ImageBytes() As Byte) As Image Dim imgNew As Image Dim memImage As New System.IO.MemoryStream(ImageBytes)[code]..........
I have some problems with converting the Image to Base64. Functions: Public Function ImageToString(ByVal im As Image) As String Dim ms As New MemoryStream() Dim.Save(ms, im.RawFormat) Dim array As Byte() = ms.ToArray() Return Convert.ToBase64String(array) [Code] .....
I use this code for converting it: StringToImage("Some Picture...")
But when I try to do the ImageToString, I need to enter something like this: ImageToString(imageString) How can I get that imageString?
I have an example of standard text (in Hex form) in a specific encoding (selected by the user). And I have a weirdly encoded text which is in the same encoding but a little different. How do I convert the Standard to the encoded Hex?
Cyrillic (ISO-8859-5) Example: ## 12 91 BB BE BA B8 C0 2E 20 CD BA C0 B0 BD B0 20 B8 20 BA BB B0 B2 2E <- ALTERNATIVE B1 DB DE DA D8 E0 2E 20 ED DA E0 D0 DD D0 20 D8 20 DA DB D0 D2 2E <- STANDARD Diff. from Standard (in Decimal): -32
Hebrew Visual (ISO-8859-8) Example: ## 1C 0B E0 E2 D9 DC EA 20 DE E1 DA 20 D5 DE E7 E9 D9 DD <- ALTERNATIVE F0 F2 E9 EC FA 20 EE F1 EA 20 E5 EE F7 F9 E9 ED <- STANDARD Diff. from Standard (in Decimal): -16
I'm just wondering how to convert a string from a textbox into hexadecimal. I looked all over the internet and only found ways in c#. Does vb.net have the ability to do such a thing? If it can then I'd like to know how to convert string to hex and hex to string.
Possible Duplicate: How to convert numbers between hexadecimal and decimal in C#? In C, you can do something like int x = 255; printf("x is: %d and in HEX, x is: %x", x, x); How can I do that in C# or VB.net? print the variable's hex equivalent
I have a problem reading ID3v2 text identifier tags when they are encoded in unicode. If i update the tags using winamp the tags are encoded in UTF-16 with BOM. When i try to read the tag i step through each byte and use chr(byte) to get the character that that byte represents. But when the bytes are unicode i get some characters (shown below) as the first two characters:
The remaining characters are correct, it's just these 2 first ones.
What are these for? and how can i get rid of them or read the bytes as unicode characters? i've tried reading the ID3 website and many other sites too but i don't know what to do. i can check the text-encoding byte in that tag frame to determine whether or not the tag is encoded in unicode or ISO-8859-1 but i don't know what to do next.
Searching this forum and google turn up things which seem too complicated(more then 4 lines of code), but maybe it needs to be that way.I have two text boxes. A 1 byte hexidecimal value would be entered in to each of them (0-FF). How can I add those two values together to come up with an integer?I have tried this several ways. At one point I got it to work but only for numeric characters.
I have a program written in VB.NET and I have a textbox for the RFID tag (which is in ASCII format) and then convert it to a simple text format to be saved to my database. How can I convert ASCII to plain text to save to my database?
im having trouble understanding this question for a homework assignment. I need to write the PSEUDOCODE for the following scenario, but i got no idea about how to convert a hexadecimal number to a decimal number..You are required to input a two digit hexadecimal number eg. 3f (digits can be entered separately) and calculate the equivalent decimal number. (note the decimal number will be between 0 and 255) . output the decimal number
I have a string of characters, but I would like to have a string of hexdecimal characters where the hexadecimal characters are converted by turning the original characters into integers and then those integers into hexadecimal characters. How do I do that?
url...we get the encoded as alphapet base64..i want to talk as low level programming what will happen or this data how it will represent as binary and send it is it encoded again as ascii to binary or there is another idea.
I am writing a little project to parse a CSS file, and base64 encode all the background images.While I am able to parse the CSS correctly, it seems that everytime I try to convert the image file into a base64Encoded string, the string returned is always exactly the same.Please assume that all image paths are passing correctly to the method. In this instance, all images are fully qualified urls, so the first section of the method is what is doing the conversion.[code]
I need to call a web service from .Net and the web service is authenticted through Base64 authentication.I tried with Web service proxy and it is failed.
My app receives a PDF as a base64, zLib deflated string in an xml file. At least that's the format I'm told it is in. It gets stored in a database, then I need to recreate the PDF from that string. I created a test app to figure it out. The function below takes the string and is supposed to return it in a decoded, inflated format which I believe I'll be able to use to rebuild the original PDF (I'm not there yet). I've done lots of research and found a few different libraries and ways to do this as well as received a java program from the developer who is sending me the PDF to use as an example. However I can not get the string to a usable format. Using the ManagedZLib.dll and the function below seems to get me the closest. As far as I can tell from debugging, everything works until I try to decompress:
This produces a "zLib error: -3". The only info I can find on that error is it is a 'data error'. There is very little other information on the web about it.
Public Function DecompressString4(ByVal origString As String) As String Dim returnString = Nothing ' get the base64 content into String ManagedZLib.ManagedZLib.Initialize()
I have been having some problems trying to decrypt the string returned back from SagePay.I used their asp.net kit which included the encrypt and decrypt functions using base64 - sending the information to SagePay is not a problem but I am having a number of problems trying to descrypt the string.Here is the function I am using to descypt:
Private Function base64Decode(ByVal strEncoded As String) As String Dim iRealLength As Integer Dim strReturn As String Dim iBy4 As Integer
[code]....
I don't think the web server is trying to encode anything as there are no + symbols within the url string and I have just glanced over the two to compair they are the same.This returns a blank string whereas when I use the sections commented out in the first loop i get a really weired string back and when I use their simpleXor function it just returns complete nonsense.
I've been working on this challenge for a while now without much luck. What I'm attempting to do is split a MIME byte response into its individual images. I am given the boundary to split on in the HTTP header but when I attempt the following code it doesnt work.
'boundary to split on Dim boundary as string = _ "boundarystring"
I have a data table being returned that populates a repeater. One of the fields has the & character in the data and displays perfectly within the asp:literal on the screen. The source shows the & character un-encoded.My question is this: Does it NEED to be encoded? A co-worker is insisting that it must be encoded in order to be "HTML compliant". But it works perfectly for display purposes. Is this REALLY required for any type of compliance that I should even be worrying about?
I have a challange to convert the detected Encoding format of Text file to selected Encoding format. Like if the detected file is in Utf-8 and if user want to convert the encoding to Utf-16 or ANCII or Unicode. It will happen on one button click and the file will convert to the desired output encoding format.
Right Now I am able to detect the encoding but conversion not happening.
