Read Image From SQL Server?
Mar 27, 2012
Been away from coding for almost 10 years, trying to get back into it but am a bit rusty. I have been asked to write a program that will allow users on a network to write hire data, driver data, job calander etc to a SQL database. The program works perfectly at the moment apart from one thing.
The program must allow the users to add an image to a drivers record to have on file, I have read loads of different forums, tutorials etc on how to do this and have managed to get my program to size the image properly and store it as binary data (i think) in the SQL database. I am now having problems doing the reverse and making the program read from the database and display the image in a picture box, the following is my code to save to the database
vb.net
Private Sub OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk
Dim strm As System.IO.Stream
[Code]....
I understand that there may be easier ways to do this, this is simply the way I did this years ago, if any one can give me any pointers or any tips on how to read from the DB and display the image in a picturebox
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Feb 21, 2012
ok i have image that i bind info in it and i want to read the info now from file (FileStream) its workbut i want to do it not from file so i need to use MemoryStreamhere the example that work and how i do it now how i make it work with MemoryStream (with byte = My.Resources or PictureBox1.image)
Using FS As New IO.FileStream(image, IO.FileMode.Open)
FS.Seek(0, IO.SeekOrigin.End)
While Not FS.ReadByte = Asc("|")
[code].....
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Mar 18, 2012
I am trying to read a 16bit binary file (tif image) and pixel values of the image ranges from 1200 to 4500. I tried to use BinaryReader using ReadUInt16 but I get EndOfStreamException Unhandled error. ReadByte method works fine with an 8bit tif file. I do not know how to read a 16bit image file using binaryReader. Shouldn't I use ReadUInt16 since values of pixels range from 1200 to 4500?
[Code]....
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Feb 25, 2011
I have a client/server application set up that the client sends a word file to the server and then the server converts that word file to a .TIF and sends the image back.The stuff I have now works.Say if I sent the size of the file and the actual file byte() to the server back to back, would the NetworkStream contain both back to back? This what I though would happen. So I implemented a kind of 'turn' based interaction during the duration of the conversion process.
[Code]...
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Jun 10, 2011
I've managed to put together some code to retrieve data from a sql file. I plan to connect to a sql server that are operated by a database program, that update the registry every 10 sec.
Before I try to connect my program to the sql database, I need to know if my program will prohibit other progrograms to read and write to the database.
My program:
Imports System.Data.SqlClient
Public Class Form1
Dim SQLRead As SqlDataReader
[Code].....
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Dec 30, 2011
Imports System.Web
Imports mshtml
Public Class Form1
[code].....
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Jan 5, 2011
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Feb 20, 2012
I try to load image byte to memory and read it in memory (not from file - string)
with FileStream i do it like FileStream(image, IO.FileMode.Open) image = string of file path
so i want to do it with MemoryStream(image) image = image byte
i try many things but still cant get it [code]...
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Jul 1, 2012
I have data that was stored in a sql 2008 table in image format. I want read the data from sql with VB.net 2005 and put it into a character array or a byte array where I can access the data within the code. I can not use file stream to read the data because I have no ability to read files from a directory.
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Jun 2, 2009
It turns out I wasn't checking the path that it was looking up, quite silly of me. Once I tracked that problem down and corrected the offending path, the reading worked just fine. Still baffled at the MSSQL issue, since the articles average less than 10 000 bytes.
Clarification:I am unsure if some of you are under the impression that the file I am trying to read is on my local machine. It resides on the web, on the same server as the script that is accessing it. Just in a different directory.
I wrote an online help desk application that includes articles. One problem I have run into is some of the articles are too long, and get truncated when I put them into my MSSQL database. I tried using TEXT and VARCHAR(MAX) as the data type, but it would still get truncated.So I decided that I would put the articles that are too long into a text file, and have my application read the text file from there. I got this code working in my development environment, but it does not work live:
[Code]...
At first, I thought it was because I did not change the /dev path prefix to /hlpdsk. But even after I changed it, it bombed out. What am I doing wrong?
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Code:
Dim reader As SqlDataReader
Dim par As SqlParameter
Dim result As String
[Code]...
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Dec 13, 2011
I'm adding in asp.net (vb) an attribute to an image-button:
imgButton.Attributes.Add("myAttr", "true")
This is working fine. Now I want to read the attribute, but it does not work:
If imgButton.Attributes("myAttr") = "true" Then
..doSomething..
How do I get this thing working?
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ItemCommand
Dim imgButton As ImageButton
If e.CommandName = "imgBtn1" Then
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imgButton.ImageUrl = "myURL"
[Code] .....
While debugging, it still skips everything, because all Attributes are empty (but actually they are not)!
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[Code]....
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