Convert Image To Base64 String?
Jul 20, 2011
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]..........
View 1 Replies
ADVERTISEMENT
Jul 13, 2010
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?
View 9 Replies
May 8, 2012
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'.
View 2 Replies
Dec 28, 2010
I'm trying to convert standard bytes like so:
00DEAD00BEEF0000
and convert it to base64.
I want it to go from bytes -> Base64.
Not
String -> Base64.
View 19 Replies
Dec 19, 2011
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?
View 2 Replies
Jul 29, 2010
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...
View 1 Replies
Jun 28, 2011
i've entered image path from vb.net to oledb but can't convert it as an image to thedatagridview column.
View 6 Replies
Feb 8, 2012
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:
zStream.Read(decompressedBytes, 0, decodedBytes.Length - 1)
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()
[code]....
View 1 Replies
Jan 25, 2011
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.
View 1 Replies
Jun 16, 2009
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"
[Code]....
View 5 Replies
Aug 28, 2011
I need to convert image to string (a simple picture, only numbers) like the following picture:
View 7 Replies
Apr 3, 2012
I want to convert an image to a string, then put it into 1 cell in a datagridview as a string. I've read around on the forums and I saw some people say to use StreamReader, others say BinaryReader. Well Imma try both and see how it comes out. But I'm kinda stump. I'm trying StreamReader first, and I don't know how I should even do this. This is what I've got:
Dim ofd As OpenFileDialog = OpenFileDialog1
ofd.FileName = ""
ofd.Multiselect = False
[Code]....
In my do loop, should I put it into a temp text file and then read that textfile into the datagridview? If I did that, I think it would take up some time.
View 2 Replies
Dec 3, 2009
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 _.
View 2 Replies
Apr 28, 2010
The coding below is to retrieve the Raw Image Data from the Database and then write as a JPG image file. The problem is the image file (image.jpg) is "nothing" after file created. I guess there is something wrong in the following coding.
fs.Write(rawData, 0, fileSize)
No any runtime errors I can find, and I double check rawData (i.e. Buffer) contains data. But don't know why there is "nothing" inside the image (image.jpg).
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim fileSize As Integer
Dim rawData() As Byte
[code]....
View 4 Replies
Sep 6, 2009
How do you convert a System.Drawing.Bitmap image to any other type of image? I tried CType, which failed, since I do not know the type for .png or .jpg. I cannot find it anywhere on google either.What is the most efficient method to do this, which keeps the quality of the image as high as possible?
View 2 Replies
Mar 11, 2010
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.
View 12 Replies
Apr 20, 2012
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]
View 2 Replies
Dec 6, 2011
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.
[code]....
View 15 Replies
May 23, 2012
I have a black & white image (find below)I want to print that image by clearing the background(i.e black dots in the form of rectagle)If i print the below bank check it is printing completly black (unable to read the content). Pls do the needful. Many Thanks
View 4 Replies
Aug 20, 2010
I try to add text strings to an image but keep the metadata of the original image. The problem is How can I save ImgMetaData (from the original image) to the new image?
Here are the codes:
Public ImgMetaData As BitmapMetadata
Public myImageCodecInfo As ImageCodecInfo
Public myEncoder As Encoder
[Code]....
View 12 Replies
Jun 7, 2009
I'd like to convert a string which contains a decimal number into string that contains the binary value, the octal and the hexadecimal value of that decimal number.Afterwards I also like to convert a string containing a binary, octal and hexd. number into a decimal string.Basically I'm looking for the functions:
dec2bin
dec2oct
dec2hex
bin2dec
oct2dec
hex2dec
I'd not prefer to rewrite a function, I'm sure the framework must have these functions already.
View 5 Replies
Apr 15, 2009
Whats the best way to convert a list(of string) to a string with the values seperated by ,
View 3 Replies
Dec 16, 2009
Is there any way to convert null terminated string to normal string.I mean I can easily make a program to find the location of vbnull but there has to be a built in function for that.
View 1 Replies
Dec 24, 2011
I need to convert a string array into a very long string with following requirement:
can not using any character escaping can not using XML can not using single character as separator (e.g. comma or space as separator)
View 1 Replies
Sep 1, 2010
how can i convert these datatypes: date to string and integer to string.Because it must be in a string datatype when I display it in a datetimepicker and textbox.
View 3 Replies
Nov 28, 2009
Basicly a simple test program of converting a image to a string, then converting the string to a image.
[Code]....
View 3 Replies
Feb 16, 2011
The following is the code i m using to convert doc file to image.this works well for a file that contains only one page but if there are more than one page in doc file then it converts only first page of file to image.Can some one suggest me how to convert all pages of doc file to seperate images.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim objWord As New Microsoft.Office.Interop.Word.Application
[code].....
View 2 Replies
Feb 9, 2010
Is there any way to convert image(jpg) files to pdf in VB .net ???
View 7 Replies
Nov 9, 2009
how I can convert an RTF String to a regulat text string. The rtf string has tons of formatting info, but all I need is the text in the string.
View 5 Replies
Aug 3, 2011
Currently, I'm using the following code to pull info from the management class.
[code]...
I'm also pulling info from the bios, disk drives, video, etc. What I've noticed, is although it runs fine on my pc, it may error out on some pcs since it is hardware dependent.I'm having trouble implementing a check to find if it exists before I convert to a string and add it to my overall string.
View 6 Replies
