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Insert Image into SQL Database from VB.NET bound to id field in dataset.

Posted on 2004-08-17
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Last Modified: 2008-03-10
Here is my question and I hope it is clear enough.

In an app I am building, I need to be able to insert and update images in a sql database table that are bound to the id field of the same table. In other words I want to be able to select which id a certain image will correspond with.

I would like to be able to bind the image field to a dataset I have created. I currently have several textboxes bound to a combobox bound to this dataset and would like the image field to be bound to the existing dataset in a similar way. Please provide code and examples. I am using Visual Studio Enterprise Architect 2003. Please let me know if you need more info. Thanks in advance!!!
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Question by:patrickkenney
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9 Comments
 
LVL 18

Expert Comment

by:DotNetLover_Baan
ID: 11825846
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Author Comment

by:patrickkenney
ID: 11826975
I have seen that code and it works great, but what I need is the ability to select an image by a id. I have a database with employee information that I would like to insert images for. I would like to be able to select and employee and insert an image for him/her or update a new image. Can someone provide code for this? Thanks!!
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LVL 18

Expert Comment

by:DotNetLover_Baan
ID: 11827383
Hi there,
change the code given in that example...
To select:
     Dim cmd As New SqlCommand("SELECT ImageField From MyTable WHERE EmpId=" & EmpId)
     cmd.Connection = con
     Dim da As New SqlDataAdapter(cmd)
     Dim ds As New DataSet()
     con.Open()
     da.Fill(ds)
     con.Close()
     Dim bits As Byte() = CType(ds.Tables(0).Rows(0).Item(0), Byte())
     Dim memorybits As New MemoryStream(bits)
     Dim bitmap As New Bitmap(memorybits)
     PictureBox1.Image = bitmap
   
To update:
     Dim Data() As Byte 'Say Data() has the binary data of the Image
     Dim cmd As New SqlCommand("UPDATE MyTable SET ImageField=" & Data &" WHERE EmpId=" & EmpId)
     cmd.Connection = con
     con.Open()
     cmd.ExecuteNonQuery
     con.Close()

-Baan
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Author Comment

by:patrickkenney
ID: 11830983
I receive an error when I try to use &Data& as a variable in the update statement. Help!
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LVL 18

Accepted Solution

by:
DotNetLover_Baan earned 2000 total points
ID: 11832543
First read the image file into Data()...

            Dim fs As New FileStream(YourFile.jpg, FileMode.Open)
            Dim Data() As Byte = New [Byte](fs.Length) {}
            fs.Read(Data, 0, fs.Length)

Then update, with SqlCommand.
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LVL 18

Expert Comment

by:DotNetLover_Baan
ID: 11832547
what is the error you are getting ??
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Author Comment

by:patrickkenney
ID: 11835369
Well, I figured out what I was doing wrong, but now only the first page of the bitmap shows up when pulled out of the database? Any ideas? Thanks!
0
 
LVL 18

Expert Comment

by:DotNetLover_Baan
ID: 11835451
what do you mean by >>"first page of the bitmap "<< ??
0
 

Author Comment

by:patrickkenney
ID: 11835508
Eh, just not my day. Was one of those ID10T errors. Thanks for you help!!!
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