I have found that an image can be stored as some string. To give an example I have included a ms word part that has an image.I saved a word file with image and saved it as xml format .when i opened the xml file in a notepad i got following section. It must be the image being stored as some stream of text. Is there a similar way to do it in .net.
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I am doing project in vb.netI am using a Rich text box on which i can set different ont(name,size,bold,italic,underline),color to different selected text.I am able to do this in Rich textbox but i want to create bitmap (or assign to picturebox) of this of different text with different font style & color but i am getting not much font as like textbox in image..
View 1 RepliesWhen I swipe a card into Word Pad, I can see the information on the card. his information is a 39 character string of letters, numbers and other characters.I would like to be able to 4 consecutive characters of the 39 as a userid.Sample string of characters:;12345678GAM123456789GAM123456789GAM12?
View 6 RepliesI am having a strange issue when using the StreamWriter where I am getting some strange charachers in my text file when reading data from a query string.
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I am using StreamWriter and StreamReader in VB.NET 2008 Express to read and write ASCII text files. When I create the file and later read it, there is no problem, because I use System.Text.Encoding.UTF8 on both the write and read sides, so extended text is handled without problem. But sometimes, I have text files come in that are just straight 8 bit ASCII without the Unicode BOM... and they get a lot of junk when I try to read in anything with extended ASCII characters in it. It seems like the 8 bit extended characters are translated into multi-byte codes, and since they are filenames, of course, that doesn't work. Since the filenames just have straight 8 bit ASCII filenames. I have tried all sorts of encodings, and nothing seems to work.
The most common character that causes a problem is an "a" ... it is used in a lot of proper names. The funny thing is that sometimes is seems to workout... is there a way to read these types of text files? Some way to just tell StreamReader not to decode the text, just treat it as straight plain 8 bit ASCII text (with the old IBM PC mapping, I think). The one thing that works is to manually edit the input, replacing the extended characters with their un-accented partner and then renaming the files to match the new spelling. Maybe I should just go to read them as byte input and breaking the lines apart in my code.
I'm trying to setup a simple app that reads a file and then writes the contents to another file using OpenFileDialog and SaveFileDialog. Looking at the debbugger it looks like it's reading fine, I can see the data I want written. Towards the end of my code I get the following error message:"Illegal characters in path". I've researched this error. I'm not using any illegal characters such as /\? etc and the pathname contains all alpha characters. I'm pulling the test file from the C drive and trying to save it there as well.
Path: C:\Test.csv
My code:
Private Sub btnAppendData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAppendData.Click
Dim Result As DialogResult
Dim FileContents As String
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I am trying to convert the image from 'System.Drawing.Bitmap' to 'System.IO.Stream', but i am getting an error.
the error is: Value of type 'System.Drawing.Bitmap' cannot be converted to 'System.IO.Stream'.[code]...
I ve the following stream but I don't know its encoding type because the stream reader detects encoding from byte order marks
Dim reader As StreamReader = New StreamReader(respStream, True)
so how can I detect the encoding type AND convert it to another type? (for ex. from ASCII to UTF8)
PS: What is the difference with the following line?
Dim reader As StreamReader = New StreamReader(respStream,
Encoding.ASCII, True)
I am producing an XML file in my unit test using
Public Sub rssParserTest
Dim Const rssUri as String = "rssTestFile.xml"
Dim xmlFile = <rss version="2.0">
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I want to remove the unit test dependency on a physical file and use a stream instead but my efforts so far have come to nought. (Is this best practise?)I am using NMock2 for mocking if I should be doing something with that.
I'm working on a licensing system for my application. I'd like to put all licensing information (licensee name, expiration date, and enabled features) into an object, encrypt that object with a private key, then represent the encrypted data as a single text string which I can send via email to my customers.
I've managed to get the encrypted data into a byte stream, but I don't know how to convert that byte stream into a text value -- something that contains no control characters or whitespace. Can anyone offer advice on how to do that? I've been researching the Encoding class, but I can't find a text-only encoding.
How to convert a binary stream (which is a string of numbers) into Double Array ? (VB.NET 2008)
View 3 RepliesI have built a simple image viewer in .NET and have the requirement to display multi-frame TIFF images in the browser. Presently, I have a (ashx) handler setup to stream back JPEGs that are co-mingled in the same database as the multi-frame TIFF's and it's worth mentioning that this handler will also return the first frame of the TIFF file in its current state. In the VB.NET code below (part of the handler) I am able to identify if a TIFF file has multiple frames and I started attempting to stitch the frames together but have not had any success yet. Has anyone returned multi-frame TIFF's using a similar approach? Note: I used the How to open a multi-frame TIFF image as a reference when developing the code below.
context.Response.Cache.SetCacheability(HttpCacheability.NoCache)
context.Response.Cache.SetNoStore()
context.Response.Cache.SetExpires(DateTime.MinValue)
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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?
View 3 RepliesI have an issue in streaming database.I have already write an image there and now i want to recall and put it in a PictureBox.
View 4 RepliesI am working on a program that alters very large images. The images are usually in .tif or .bmp format. I load up the old image, copy a section of it into a new image, then save the new image. So far everything works my problem is that the images that i have to alter are 900mb+. Using the simple Bitmap class is not working because the images are quite apparently too large to fit into memory that way. (throwing an OutOfMemory exception)I want to step over the part of loading the image, and turn it into streaming the pixels from the image straight from the disk. I kind of have an idea of how to get the stream open and start reading, but I have no idea what to do with the 32bit integers that are being returned. how to stream pixel data from an image?
Dim oldImage As Bitmap
Try
oldImage = New Bitmap(file)
Catch ex As Exception
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I am needing to take an image from my Picturebox and make it into a stream so I can send it to a website. In otherwords, I have an image in my picturebox, and I am trying to pass it along to a server without actually downloading it to my computer. I am trying to do this in a JPG format if possible as well.
View 3 RepliesHow would I go about doing this? I plan to send the image over a network.
View 3 RepliesI have been asked to read text out of a Word document, convert to UTF-8, then write them to an xml file with their character codes. On a scale from 1 to 10, I have about .0001 experience with encoding, so I will try to explain and answer questions to the best of my knowledge.
Currently, in the Word document we are reading as a test document (for learning how this works), we have the following characters in a bookmark range in the the middle of other text[code]...
I am trying to write a program and I am stuck on the first part and it goes as follows:A word is converted to a password were these letters are converted to the following:
a is converted to *
e is convertedo 5
i is converted to 9
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I'm trying to create my own special filetype that can be read by others, but I need to make it a special language that a program can convert to. Basically if I have this text[code]...
View 1 RepliesI want to make a program that for example i will type in text box 1 "sample" but the text that will appear is a different letters or word, example of that is i type in text box the word "single" but the text that will appear is "sample".... i know this will be in the key press event?
View 3 RepliesI am using a third-party .NET video capture function library that displays atreaming video from a USB video capture device in a VideoPictureBox (which is very much like the usual .NET PictureBox). I want to display graphics and text over the video stream.
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I have a text document that is a roster of licensees. I am looping through this document to create a html table of this data. I've come across names with non standard characters.
This is one of them
Aimeé
I tried running all the inputs through the following function, but when it comes across the above character it doesn't replace it.
Function ReplaceBadCharacters(ByVal input As String) As String
Return input.Replace(Chr(233), "é")
End Function
How can I replace each character with the html equivalent?
EDIT
When I debug the above function it shows the input as Aime[] and not Aimeé.
In Chrome it looks like this Aime�
is there a way to convert characters to 7BIT ASCII with .NET?
View 3 RepliesIs there any easy way of converting a windows-1252 string into a Unicode one?
View 1 RepliesMy application is in VB.Net and I'm using the driver of IBM Client Access to access data on our IBM iSeries server.
The problem is that some characters are not translated automatically in CCSID 65535 (i.e. the € character) and the update/insert command fails.
I don't know on which level the problem must be handled. On the ODBC driver ? In the connection string ? Or do we have to create a conversion dll ?
i've entered image path from vb.net to oledb but can't convert it as an image to thedatagridview column.
View 6 RepliesI'm an undergraduate student from Singapore University, would like to enquire you on how to convert character codes to ASCII codes using visual basic. regarding the codes on how to build it as I need it for my semestral project
View 3 RepliesThe 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
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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?
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