Now i have some images and i have a database (MS Access)i need to convert all images to !one byte array!(couse i have 1 column for images) and i save this array. Then when i need a picture i should take some pic on this byte array.umm i think i cant explain my status :)
i need to cut this byte array like split function. so then i can choose image whatever i want
I have this code which saves an "Image" to a SQL Server database:
vb.net
'You have the images in the PictureBoxes, now you need to store it as a Reference Image
'if the user has selected that option
Dim ms2 As New MemoryStream()
[Code].....
I am working on a PHP site at the moment that is having trouble reading that data to display the image, so I am attempting to not only save it to the DB, but also save it as a bitmap or other file type to the actual server.
How can I create an image file (not really picky on which file type) from the "arrImage()" data above?
since 2 week i'm stuck to do this thing. Actually i need to display image from oracle database into the picturebox. My oracle database got table name "STAFF_PHOTO" and the column of photo is "PICTURE". The image already converted into ByteArray. I'm already make a connection and success but the image stil cannot display. already refer to the tutorial but still stuck. I'm also try to use Memorystream but still can't.
View 11 RepliesI'm having a image inside the picture box which is loaded from the database as a byte array.And again i want to convert the image into byte array.I can find the solutions on converting the image, which is stored from hard disk or something like, to byte array.
View 7 RepliesI'm trying to convert a image into a byte array for use in a msacces db.THis is the code I use but I can;'t get the byte array?
Imports System.IO
Public Class Form1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[code]....
does anybody know how to put an image into a Byte array without specifying a format? I have a Listview with images downloaded from the internet and I want to save them all together to the hard drive as a single file, by using a structure. In order to do this I need to put the Imagelist images into a byte array. When the application starts I reload the images into the Imagelist again.
[Code]...
I try to read a stream and save it as byte array to add it later to zip file.this is the code that I use
Dim totalbytes As Byte() = Nothing
Dim iBytesRead As Integer
Dim sChunks As FileStream = File.OpenRead("c:myfile.wav")
Dim Totalread As Int64 = 0
[code]....
but there is something is not correct,
I have a byte array of a file and I need to save it into my database in a field that has been set aside of type image.
However I have a problem my data access class takes a sql string and commits it to the database for example.
"EXECUTE stored proc @parm1, @parm2, @parm3"
However the problem is I cannot figure out how to transfer the byte array to string so that I can add it as an argument.
I hope this make sense.
I also understand that I can build parameters in com objects but I do not want to do this as it will disrupt my whole data access class and I am not prepared to do this at the moment.
im trying to save a encrypted password to a application settings which is a byte array but didn;t find any easy way to do so. i did try to convert the byte array to string adn read the string back as a byte array but the problem was the bytearray lenght increases when i read it back.
View 1 RepliesHow do I convert between an image object and Byte Array?
View 1 RepliesI've created a new access 2007 database + added a OLE Object field, that i've then pasted images into.in vb2008 I've connected to the database + put the table into a datatable. so far it works ok.when i try to convert the byte array to an image, it causes an error:
'A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll'heres the code i'm using[code]....
and i need to convert the image into a text.now anyone thinking that i can just use ocr is unfortunatly wrong i have tried about 5 of them and they dont work because the text in the image is to small for it to recognise it.so i need to search the above image for a smaller image such as this.so by doing this if i get a result saying true then i will be able to go from be there and convert to text.now i know of two way to search an image for a smaller image. first is by going by pixel search and well i can get that to work but it is to slow.the second method is to convert the image to a byte array(beig an image it will be a 2d byte array) and convert the other image to a byte array and then compare.
View 4 RepliesI have a device with upon serial communication, it send the data as HEX values, (e.g., C020042ABD0F91A103E400F929EBC). I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
Dim bCount As Integer = 4119 ' it is the size of the chunk not block size
Dim data(bCount) As Byte
[Code] .....
I have a Problems Regarding with the IMAGE I create a Program That save Information of END USERS including Image...but the Image will save into Bytes.....and I have no Problem in that as you seen below.....
[code]...
This is My Problem i have this Search Engine that can Search information that can show the information needed from the database....... it works Nicely but I don't know how to show/Retrieve the Image from Bytes to Image itself and show it into the PictureBox1.. the code shown Below..
[code]....
i've created a new access 2007 database + added a OLE Object field, that i've then pasted images into.
in vb2008 i've connected to the database + put the table into a datatable. so far it works ok.
when i try to convert the byte array to an image, it causes an error:
'A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll'
heres the code i'm using:
vb
Dim arr() As Byte = DirectCast(record.Item(5), Byte())
pic.Image = Image.FromStream(New IO.MemoryStream(arr))
its loading the byte array properly, but the Image.FromStream line causes the error. i've used this method before with an earlier access database + it works.
i do not know why data type image on ms sql is not working ! so i choose to use varchar(max) as my datatype to store images.. but i do now know how to load it on crystal report..
View 1 RepliesI am trying to Convert a data field stored as IMAGE ( SQL Server 2000) using Java to a byte array using VB.NET Java uses signed numbers for a Byte array where as VB dosent. Can somone point me to how I can covert java byte array to VB byte array?
View 2 RepliesObjective: Combine byte arrays, read specific sections, and then cut byte array at specified point.
Private Sub DataArrival(ByRef aBot As xyzSocket, ByRef theData As Byte())
Dim RDLength As Int32
If aBot.ReceivedData Is Nothing Then[code]....
I'm not sure if I have this right to begin with because I can't test it without having it completed.
how to upload file using fileupload control into sql database. I have class where i created insert function and getting info frm the .aspx.vb file
Class File
========
Imports System
Imports System.Data
Imports System.Data.SqlClient
[coe]....
I have 2 byte arrays. I want to merge these two byte array into 1 byte array.Usually, I just create a new byte array with length = byte array #1 + byte array #2. Then copy byte array #1 and #2 to the new byte array.do I have more efficient way to merge 2 byte array using VB.NET and .Net 4?
View 2 RepliesI would like to create a function so that I can pass a string and it will return me the binary value, I will use this later in other parts of the script but I am getting an error that I don't understand.
Private Function ConvertToMD5(ByVal OldPassword As String) As Byte
Dim NewPassword As String = ""
'The string we wish to encrypt
[code]....
On the "Return hashedDataBytes I get "Value of type '1-dimensional array of Byte' cannot be converted to 'Byte'"
Suppose i have an image and i extract each pixel color and store it in a color array, is there any way by which i can save the color array along with the image? I was thinking about converting the color array to string and then integer and then append data to a text box, but then again i must store the text along with the image....and i dunno how to do that?
View 1 RepliesI have 9 1-dimensional arrays of bytes and 1 of them is empty, I want to make the empty one equal to the others put together like you would a string:
Dim bla As String = "bla" & "bla" & "bla"
'now bla = "blablabla"
but instead:
[Code]......
How do I read a raw byte array from any file, and write that byte array back into a new file?
View 3 RepliesHow could you convert a IntPrt to a Byte Array (Byte()) ?
View 19 RepliesI have a byte array that I convert into a string like so Dim byt As Byte() = New Byte(255) {} s = New String(Encoding.ASCII.GetChars(byte))My question is when I look at the string in a debuger its clearly a normal string but when I compare it to what I know its supposed to be it doesnt equal. So i did a quick check and for some reason its return a string thats the length of 256 characters. So i did a s.trim and it still is 256 characters long.
View 1 Repliesgiven my code below, I'm trying to figure out how to create an array of 1 byte containing 7 bits. So the byte in the array would contain 0111111 to correspond to mData_Out's boolean values. How would I change the following code? [Code]
View 8 RepliesI am trying to get a count of all the times a byte sequences occurs in another byte sequences. It cannot however re-use a bytes if it already counted them. For example given the string let's assume the byte sequence was k.k it would then find only 3 occurrences rather than 5 because they would be broke down like: [k.k].[k.k].[k.k]. and not like [k.[k].[k].[k].[k].k] where they over lap and essentially just shift 2 to the right.
Ideally the idea is to get an idea how a compression dictionary or run time encoding might look. so the goal would be to get down to just 2 parts, as (k.k.k.) is the biggest and best symbol you can have.
Here is source so far:
[Code]...
I didn't think it fair to post a comment on Fredrik Mörk's answer in this 2 year old post, so I thought I'd just ask it as a new question instead..NB: This is not a critiscm of the answer in any way, I'm simply trying to understand this all before delving into memory management / the marshal class.
In that answer, the function GetByteArray allocates memory to each object within the given array, within a loop.Would the GetByteArray function on the aforementioned post have benefited at all from allocating memory for the total size of the provided array:
Dim arrayBufferPtr = Marshal.AllocHGlobal(Marshal.SizeOf(<arrayElement>) * <array>.Count)
I just wonder if allocating the memory, as shown in the answer, causes any kind of fragmentation? Assuming there may be fragmentation, would there be much of an impact to be concerned with? Would allocating the memory in the way I've shown force you to call IntPtr.ToInt## to obtain pointer offsets from the overall allocation pointer, and therefore force you to check the underlying architecture to ensure the correct method is used*1 or is there a better way? (ToInt32/ToInt64 depending on x86/64?)
*1 I read elsewhere that calling the wrong IntPtr.ToInt## will cause overflow exceptions. What I mean by that statement is would I use:
Dim anOffsetPtr As New IntPtr(arrayBufferPtr.ToInt## + (loopIndex * <arrayElementSize>))
I've read through a few articles on the VB.Net Marshal class and memory allocation; listed below, but if you know fo any other good articles I'm all ears![URL]..
A c# class's single dimension byte array contains socket level instrument sensor data as per:
public static byte[] frameData