Loading An Image Saved As Type 'Attachment' In An Access 2007 Database?
Jan 31, 2012
I'm having a problem that I've spent all day researching to try and figure out. It seems that the 'Attachment' type in an Access 2007 DB file is stored as three seperate pieces of data in the one field. If you open up the Relationships view, you can see it in the table itself.
I'm trying to do a simple DVD movie database to keep track of everything I have, and who I've loaned things out to. I'm doing this in part to further my education in VB.NET and to figure out some of the things involved with interacting with databases. I haven't actually written any code yet, read on and you'll understand what's going on.
I've got an Attachment field setup in the database to hold a picture of the movie poster or DVD cover art or something like that to help identify the film, and I named it 'Art' of type 'Attachment' since that will hold an image. Looking at the table in Access I see that 'Art' is broken down into three entries: Art.FileData, Art.FileName, Art.FileType. I'd like to be able to pull the filename and file type and display those on the form, but we'll get to that later.
When I use a drag-n-drop gridview of the database into my blank VB form, the Art field just shows the filename, in my case it's 'screenshot.png' since I just dumped a screen shot in as a test. So, the gridview on the form will see the field and display the filename, which is fine. If I do another Windows form and drag-n-drop a Details View (instead of the grid view), and have the Art field in the table set to a PictureBox (in the Data Sources view, you can highlight a field and then designate it as text or picture
or date or whatever), I end up with a blank box instead of my image.
I haven't typed any code into any of the forms at this point. I'm still in the Designer trying to get the layout and stuff the way I want it, afterwhich I'll start adding buttons and methods and such to search for things, print out a nice list of the films in the database (with and without pictures) and be able to sort out a list of who I've loaned things to (like an overdue book list). But so far, by just dragging and dropping from the Data Sources into the form, Studio automatically creates the dataset and bindings and such to read from the database file, and I can see all of my test data *except* for the image in the PictureBox (it's just blank/empty).
So, if you want to see what's happening and sort this out, then you need to do the following:
1. Create an access database with a table, that table having at least one field of type 'Attachment'
2. put a picture/image into that field as a first entry
3. in Studio (or in my case Express), create a new project, which'll have a blank form in it by default
4. create your database connection by using the 'Add new data source...' wizard for your Access DB file
5. from the Data Sources, expand the table views and change the attachemnt field from the default of TextBox to a PictureBox (you may have to Customize the types to get PictureBox to show up)
6. drag and drop that whole table onto your form, which will automatically create form elements to display the data and stuff
7. Run it, you'll see the problem.
I have no idea what I need to look at or edit or change to get this PictureBox to display the image from the database. Like I said before, if I leave the type set to the default of TextBox in the Data Sources view, then the field will display the filename of the file stored in that field of the database. Having not typed any code yet, I have nothing that I've done that I can edit other than the automatically created stuff that Studio did when I dragged the table into the form.
Being completely unfamiliar with how VB.NET wants to talk to a database (SQL server, Access or otherwise) I decided to create this little program to learn how to do it. But I ran into this problem and need a little help. What I'm looking for is what I need to change in the bindingSource or TableAdapter or TableAdapterManager or BindingsNavigator or whatever resource is binding the fields on the form to the entries in the database so that the PictureBox will get the part of my 'Art' field that actually
holds the image, not the filename or the type. I don't know how to do that, and that's what I'm trying to learn. What I would like to know is how to both get the image to display in the PicutreBox and pull the filename for that image as well to display beneath it or something in the form.
And before someone starts complaining about writing the whole program for me, I must say this is one element of a large personal project and if you read my entire post here you'll see that there are many other elements that will eventually go with it. I just need some help getting this one thing to work. Multiple web searches and such point to a variety of different approaches, many of
which I've tried to implement but nothing has worked. I'd like to do this entirely in .NET with no other dependencies if at all possible, but some of what I've seen so far today suggests using Interop and other things to make this work, but those haven't panned out for me either as of yet. My ultimate goal with this whole program is to have one (albeit probably large) executable file that will encompass the entire program, and to have it all work. After that, then I'll look into things like creating my own modules
and DLL's and such to thin it out, but I'm not even close to that point yet.
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Oct 6, 2011
I am working on an asp.net project in VS2010 using vb.NET (not VBA) designing an interface to allow a user to upload a file to an access 2007 table attachment field. My understanding is that in order to interface with a table with an attachment field you
must use DAO to connect to the database so that you can expose the attachment field properties. When I try to open the DAO recordset I am getting "COM exception was unhandled by user code" with a message stating "Too few parameters. Expected 3". The error code is -2146825227 and the stacktrace message is "at dao.Database.OpenRecordset(String Name, Object Type, Object Options, Object LockEdit)"
[Code]...
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Nov 14, 2011
I have to store a image file into my Access database.
For that i've used 'OLE Object' datatype for my field. When i convert the image into byte array and tried to insert it, i got an error saying "Syntax error in INSERT INTO statement"
I want to know what datatype should i use in Access 2007 and how to convert the image to byte array in my vb.net code.
My code is...
Dim conn As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:DBHROsam.accdb")
Dim cmd As OleDbCommand = New OleDbCommand("INSERT INTO Member (ID,mname,fname,image) VALUES (@ID,@mname,@fname,@image)", conn)
[Code].....
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Jan 29, 2012
I'm trying to create a database of all the Magic The Gathering cards I have in inventory and I'd like to have a picture preview of the card in my program. In access I've created a table and for each row I've attached an image of the card. Now I can't get the image to display in Visual Studio. The picture type is the correct format and databindings are all correct. I just can't seem to get the picture to preview as I go down the list in my datagrid.So far I haven't written any code. I've built the application in design view just dragging items from my data sources window.
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Dec 16, 2011
I'm opening this discussion up primarily because I felt that it was inappropriate that Samir Ibrahim and I had hijacked another thread by turning it into a collaborative development thread. This thread will also hopefully serve as a searchable reference for those few who actually make an attempt to search the forum for information before posting a question. For reference the original thread I mentioned is [URL]
This thread is meant to be a repository for our continued collaboration on trying to find a way to update the attachment field using the OLEDB class. Samir believes that he is close to cracking the secret code.:)
Attachment retrieval and updating is a fairly trivial task using the Microsoft Access Database Engine. It is also fairly trival to retrieve the attached files using OLEDb as well. The difficulty comes when trying to add or delete an attachment with OLEDB.
The attachment field is actually a record set where each record consists of six fields. One of these fields is the data field that contains the binary file data. According to the documentation, Access will compress certain file. It appears that compression/decompression is handled behind the scenes so to say and what you are present with is sequence of bytes. The data field consists of sequence of header bytes followed by the actual data. The first four bytes define an offset to the start of the data. One thing that we are trying to determine is the meaning of other bytes in the header.
I have uploaded a sample project at: [URL]
This project is by no means a finished product. It is hard code to retrieve the first record from the included Access database.
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Aug 14, 2011
I have 2 access databases in access 2007 I want to be able to up date one from the other.
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Jan 10, 2012
I have Vb 2008 and Ms access 2007, I tried this code to show the data in Datagridview but didn't do any thing and didn't show any error. [Code]
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Aug 28, 2010
i want to save image in ms access 2000 database & i want retrive it in a crystal report in vb.net 2005
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Mar 19, 2009
I save my images into my SQL Server Database with ASP.NET(2.0).
(imageData -> image) (imageType -> varchar) (imageLength -> bigint)
Thus the imageData will be "Binary data" and the imageType will be like "image/gif" and the imageLength will be like "6458".......
Is it possible to get the image HEIGHT and WIDTH from my VB.NET code inside my ASP.NET? I want to make my picture box on my web form the size of the actual image that is saved in my database.
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Aug 1, 2011
I have multiple documents stored in Attachment data type in Access database. UsingDataReader, I need to read multiple attachments along with their file name and store them on the file system
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Oct 15, 2011
I have an application that has an Ms Access 2007 DataBase which runns great if access is installed. Is there any code that I can use in vb that I would be able to run access with out installing it.
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May 6, 2009
I'm trying to get image from Access 2007 in VB.NET 2008, however, an error is occured while running the line "img.bmp = New Bitmap(ms)":
System.ArgumentException was unhandled
Message="Parameter is not valid."
Source="System.Drawing"
How can I solve the problem,
[Code]...
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Sep 19, 2010
I have a very large Access database and the code which try to edit a record is below
[Code]....
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Dec 9, 2010
I've create a new VS 2008 Window Form Project using VB. I added an oleDbDataAdapter to the first and only form, set it to a table in my Access 2007 Database (there is only one table, PK field autonum of course and two Memo fields). The Database is in the Project's folder. A standard oleDb Connection object was created, as I expected, then I select the DataAdapter and choose 'Generate Dataset' which produces a standard DataSet called 'DataSet1.xsd'. Now when I build the project I get an error 'Error 1 Type 'FontTest.DataSet1' is not defined.' I do have a reference in my new Project to System.Data.So what the @#%$@ is going on? Why isn't the Dataset create by the DataAdapter being recongized? I can get into the DataSet Designer. The DataTable create is perfect, three columns defined correctly as I expected.
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Apr 1, 2009
I'm trying to access a database which is presently saved in .cds format (which I believe is a TClientDataSet) from within my programme written in VB.Net. The reason being, is that the programme I am writing uses the same database as another programme. Both programmes will never being running at the same time, and it is a read-only operation so I could potentially duplicate the database and convert the database to an SQL-compatible format, but obviously this isn't a tidy solution.Is there anyway that I can directly read data from the .cds file with VB.Net? It seems like this would be something that is not too complex and wouldn't be too different from just reading a .csv file.
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Jul 27, 2010
I'm using this code to update my access database.
[Code]...
If i run the program in debugmode and then do a update it will be saved to the database.(must stop and run again to see the update. How to se the update directly?)
My main problem is that if a build the program and run it outside VS then update never being saved. How can i solve this. I tried using "commit"(maybe totaly wrong) but that didnt work.
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May 2, 2011
I'm new in the vb.net world. The question I have is how to display an image which is in a access data base in a picturebox in visual basic(2010).
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Oct 15, 2011
I am using VB 2008, then I noticed that with the Provider.Oledb.12.ACE = database.accdb whatever connection string uses the bin/debug/database.accdb file when I connect my program with a database. Suddenly, a database with the same name appeared on the lets say "WindowsApplication1" folder. Then whenever I try to debug/run, it throws an error saying that it was unable to copy the database from the "WindowsApplication1" folder to the debug folder even though VB 2008 reads through the database from the bin/debug folder. As a result, after I input values when I debug, it resets because VB 2008 copies the database from the "WindowsApplication1" folder.
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Dec 15, 2011
I am trying to update a element from login table but it not showing any error massageor any thing execution is error free but finally whenever i check the database its notupdated.. i'm using access2007 database with vb 2008
dbprovider = "Provider=Microsoft.ACE.OLEDB.12.0;"
dbsource = "Data Source=|DataDirectory|Ex_m.accdb;" & "Persist Security Info=True;" & "Jet OLEDB:Database Password=123456"
[code].....
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Aug 24, 2008
Im new to VB.net. Currently im using visual studio 2008 to make a member registration form and i need to save all data into my access database 2007.
Public Class register Dim datatb As New DataTable Dim constr As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\KDE.accdb"
Dim sqlstr As String = "SELECT * FROM"
[Code]...
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Jun 12, 2009
I'm trying to connect to a access 2007 database with VB 9 and am having some problems.
I went to Data and then selected add new datasource.
Then I clicked on database and selected Next.
I click on new connection, change the datasource to access database file and then click ok.
It doesn't give me a browser box so I can choose where my access database file is. All it shows me is a connection string label and a text box to the right of it. I tried entering the full path to my accdb file in that connection string box and also just the name of the file itself since it's in the same directory but get the error message "format of the initialization string does not conform to specification starting at index 0."
Also, when I click on test connection, it always says succeeded even though no database has been selected.
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Feb 5, 2010
I have a little problem with converting data from a datagridview to my access 2007 atabase.t's been some years since the last time I've opened Visual Studio 2008. So, probably it's something easyo do.
This is my code so far:
Dim i As Byte = 0
While i <> dgInput.Rows.Count
[code].....
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Nov 22, 2009
I just installed a VB application developed using VS 2008. I installed the application on a Windows 7 machine. The application uses a MS Access 2007 database.When I run the application, an exception gets raised:The "Microsoft.ACE.OLEDB.12.0" provider is not registered on the local machine.But I don't seem to have this problem on a Windows 98 machine.
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Jun 22, 2010
I have an application that uses an *.accdb file as the back-end database. Connecting to and retrieving data from the access file is not an issue and is working quite well. However, as a precaution, I have the application first check to make sure the database file exists in the application's folder while it loads up. As a convenience, if the database file is not found, then the application creates a new (structured, yet empty) database. The creation of the actual *.accdb file and the creation of the tables is complete and is also working well.
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Aug 15, 2011
i want a code to connect the access database 2007 in vb.net i made login form having 2 fields name & password also made an access database having nameid and pwd as twoolumns,table name is Reg and access database file name is also Reg
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Feb 9, 2012
I have a code wherein datagridview will load according to the query given.I have no problem with that but when i put a loading image while reading the database, loading image wont work as well as if i put only "Please Wait" to a label.I searched from google and said that backgroundworker sahould use to this problem. But how can i use the backgroundworker?i have no idea about it.
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Jun 21, 2010
Having problims adding a picture files to the database. Bot sure where i am going worng, ignore the commented out lines that was my first attempt.
'If the query found that the name had not been entered before add it into the table
If imgUpload.PostedFile Is Nothing Then
Label1.Visible = True
[Code]....
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Oct 20, 2009
I have been trying for 2 weeks now to get this program to work.I am using VBasic and MS Access 2007 in conjuntion with a software application.the Database has 2 fields
1) Text
2) OLE Object (.jpg)
when I try to preview the data inside the DataSet I can only get the text to come threw, but that isn't the problem...the problem is binding the data to a datasource and displaying the information.I cannot get the database to display the information in FIELD 2
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Dec 27, 2011
How can i change the currency in ms access 2007. I want to change the dollar into peso. How can i do it?
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Mar 16, 2009
Has anyone succeed to compact an Access 2007 database via VB.net code? The previous methods from JRO don't work anymore and there is no help on msdn on how this could be done for 2007. compacting this database?
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