Storing Images into a Database
Mar 11, · March 11, We’re often asked how to store picture along with the records of an Access database application. The short and simple answer is DON’T. Storing images as part of the database recordset can lead to massive bloating of the database tables, as all pictures that are stored within the tables are converted to bitmap format for storage, and then duplicated when being processed by the database. What Are Techniques To Handle Image In Access Database? In the OLE field store the image you want to insert. After then for the image display just make use of the bound object Store image path in the text field and to show the image make use of image control. Another way is to store the picture.
This i,age addresses different ways using which users hpw insert images in MS Access database. Like any other document, images can really help in transforming the appearance of a presentation. Visual display also comes in handy in distinguishing different categories of a database. It is amongst the most problematic, as it is known for causing multiple server errors on OLE Object Linking and Embedding. This uses the same application which is used in MS Paint to display an image.
This technique can also lead to a number of other images displaying problems. Another complaint associated with this technique is that it can increase the size of your database to a significant amount. As Access stores and creates bitmap version of its images while hhow on this technique. This is the more preferred technique amongst the imge options.
It is also relatively easier to implement. The user just needs to store the image path in the text field, and the image is automatically displayed through the standard image control. The technique fails to work properly only while working on continuous forms in MS Access.
This technique involves the most complex procedure however, it datwbase the safest and the smoothest way to insert images in MS Access. Users can also add password protection to their images using this method. Plus this also tackles all the bloats which are associated dqtabase both the above techniques. Unfortunately, this technique also struggles while working on continuous forms. So we suggest users how to determine r value use single form and set their picture property control settings individually.
To keep the data in your Access database accessible even after a database crash, consider investing in a repair utility that can recover data from corrupted mdb or accdb files. Vivian Stevens is a data recovery expert in DataNumen, Inc.
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Apr 25, · And so the easy answer is to offer the store-images-in-folders solution. And so no one ever really knows how or learns how to code OLE data into Access. Below is code that I used to insert images with VB into a SQL database. Unfortuantely, Access does not use the FileStream method so it doesn't work with Access. In actual fact, there are three main techniques available to handle image files in tables with MS Access and these are: Store the image in an OLE field and use a bound object frame to display the image. Store the path to the image in a text field, using an image control to display the image. Store. Earlier versions of Access used a technology called Object Linking and Embedding (OLE) to store images and documents. By default, OLE created a bitmap equivalent of the image or document. Those bitmap files could become quite large — as much as 10 times larger than the original file.
In order to provide your application with cool pictures you can employ two techniques at least. One of them is that you can save the pictures in a folder and store the path to each one in a database or configuration file. The other one is to store the entire file into a database, along with its file name. Of course, each application has its particularities and you have to choose which one you will use.
Enough of the philosophical talk! Let's dive into the good stuff. The problem of uploading files to a database is not that difficult. You have to use, on the server, a certain data type when creating the table. This data type has to be capable of storing large amounts of binary data. The client has to obtain the data from the file in binary format - a byte array - and to call a procedure on the server with that array as a parameter.
In this presentation I assume that I have a database Pictures on the server with a table called Pictures. The structure of this table is as follows. I also have stored procedures for uploading, downloading and retrieving the list of uploaded files.
These procedures are shown below:. The code presented below was written using C and was tested in Visual Studio. NET The client code that gets the byte array from the file and calls these procedures is shown below. IO; using System. Data; using System. Text; using System. Else adds a new table. Contains table ds. Clear ; else ds.
Open ; da. Fill ds,table ; conn. WriteLine e. Read picture,0,lung ; fs. BigInt,8 ; kFileName. Image ; pic. VarChar, ; FileName. Add pic ; cmd. Add FileName ; cmd. Open ; cmd. ExecuteNonQuery ; conn. Dispose ; cmd. VarChar, ; fileName. Add kFileName ; cmd. ExecuteReader ; dr.
Close ; conn. I have also written a small application to demonstrate how to use these methods. A screenshot of it is shown below. Here are some snippets of relevant code for this application:.
Parse selectedText. Substring 0,selectedText. IndexOf " - ",0. FromStream ms ; Picture. Show "An error has occured. ShowDialog ; if ofd. Exists ofd. UploadFile ofd. Tables["Pictures"]; UploadedFiles. Well, choosing which type of image - file - storage technique is up to the person designing a specific application. I have tried here to show you how you can store them in a database. View All. Storing Images into a Database.
Introduction In order to provide your application with cool pictures you can employ two techniques at least. Each of them has its ups and downs: If you save your files to a folder, you might accidentally delete a file from that folder.
If this happens, you will end up with a broken "link" in your database or configuration file. However, the hard disk storage space is cheap, so you can afford to store a lot of files. If you store your files into a database, you can enforce security by using the security settings of the database. Also, there are no broken links ever. However, the database storage space is more expensive.
Another idea is that you can save a thumbnail of the image on the database for quick access and to save the actual picture on hard drive. The application The problem of uploading files to a database is not that difficult. Next Recommended Article. Classes And Objects. NET Core.