Convert Image Column's Bytes To Int's

May 14, 2008

Hi I have an image column (Spectrum) in a Table (ParticleEDS) which is populated with an array of a bunch of INT32's (4 bytes each)

Using TSQL is there any way that I can read each 4 bytes (convert this to an INT) and return this data for a given record (based on ParticleEDSID).

I know that there are 8192 byes (2048x4 bytes) that make up the image column.

I would like the output of the query/stored procedure to be:

Value
------------
1 2342
2 2334
3 3343
.....
2048 1001

I am thinking that the way to do this would be to convert every 4 bytes into an int and create a temporaty table with an integer column which I populate with int and then run a select * on this temporary table.

Does anybody have any pointers on how I can start to do this?

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JPGs Added To Image Column Truncated At 1024 Bytes

Mar 26, 2007

I have a table in a SQL 2005 database that is designed to hold JPG product images for a website. Here is the schema:

create table dbo.Eur_RMISWebInterface_Staging_ProductImages(
product_code varchar(12) not null,
image_order smallint not null,
colour_identifier varchar(10) not null,
image_data image not null,
constraint PK_Eur_RMISWebInterface_Staging_ProductImages primary key clustered (
product_code,
image_order
)
)

Product images are inserted into the table from a database on a remote SQL 2000 server. Here is the script that does that (uses dynamic SQL):

set @SQLCmd = '
set xact_abort on

begin transaction

delete Eur_RMISWebInterface_Staging_ProductImages

insert Eur_RMISWebInterface_Staging_ProductImages (
product_code,
image_order,
colour_identifier,
image_data
)
exec "' + @RMISServerName + '".' + @RMISDatabaseName + '.dbo.Eur_RMISWebInterface_GetProductImagesForWeb ' + convert(varchar(3), @PortalID) + ', ' + @Locale_LCID + '

commit transaction'
execute (@SQLCmd)

About 500 images, each about 20KB, are transferred at a time. Here is the problem - when this script is run manually, all the images are inserted completely. When the script is run as part of a job (that has several other steps), the job step completes successfully and all the images are inserted, but every single one is truncated to the first 1024 bytes of the image. What this ends up looking like on the website is a a narrow strip of image instead of a complete image. Here are some other observations:

- When I changed the "Eur_RMISWebInterface_GetProductImagesForWeb" SP to only return 1 product image instead of 500 it still failed
- The owner of the job is the same Windows user as the user I have been running the script manually as
- I have tried changing the datatype of image_data from image to varbinary(max) but it made no difference

What could possibly be going on???

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How i insert the c:pic123.bmp file into picval column of pictb table.

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May 13, 2008



Hi I have an image column (Spectrum) in a Table (ParticleEDS) which is populated with an array of a bunch of INT32's (4 bytes each)

Using TSQL is there any way that I can read each 4 bytes (convert this to an INT) and return this data for a given record (based on ParticleEDSID).

I know that there are 2048 x 4 bytes that make up the image column.

I would like the output of the query/stored procedure to be:

Value
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1 2342
2 2334
3 3343
.....
2048 1001


thanks!

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Command attempted:
if @@trancount > 0 rollback tran
(Transaction sequence number: 0x000182EB0000025E001100000000, Command ID: 1)

Error messages:


NULL textptr (text, ntext, or image pointer) passed to UPDATE TEXT function. (Source: MSSQLServer, Error number: 7133)
Get help: http://help/7133

NULL textptr (text, ntext, or image pointer) passed to UPDATE TEXT function. (Source: MSSQLServer, Error number: 7133)
Get help: http://help/7133


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Aditional Information

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(Microsoft.SQLServer.Rmo)

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Changed Database context to 'xxxxxxxxxx'. (Microsoft SQL server, Error: 341).


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alternatively, i was thinking to compare the column with the size, but worry about the accuracy:
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any suggestion/advise will be appreciated ~

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Dear people,
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1 column with: Image_title    text
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1 column with image_type  image/pjpeg
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Is there a helping hand
Below is the script for uploading the image.....and more
 
 1
2 Imports System.Data
3 Imports System.Data.SqlClient
4 Imports System.IO
5
6 Partial Class Images_toevoegen
7 Inherits System.Web.UI.Page
8
9
10 Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
11
12 Dim imageSize As Int64
13 Dim imageType As String
14 Dim imageStream As Stream
15
16 ' kijkt wat de groote van de image is
17 imageSize = fileImgUpload.PostedFile.ContentLength
18
19 ' kijk welke type image het is
20 imageType = fileImgUpload.PostedFile.ContentType
21
22 ' Reads the Image stream
23 imageStream = fileImgUpload.PostedFile.InputStream
24
25 Dim imageContent(imageSize) As Byte
26 Dim intStatus As Integer
27 intStatus = imageStream.Read(imageContent, 0, imageSize)
28
29 ' connectie maken met de database
30 Dim myConnection As New SqlConnection(ConfigurationManager.ConnectionStrings("Personal").ConnectionString)
31 Dim myCommand As New SqlCommand("insert into tblMateriaal(Image_title,Image_stream,Image_type,ArtikelGroep,ArtikelMaat,Aantal,Vestiging,ArtikelNaam,ContactPersoon,DatumOnline) values(@Image_title,@Image_stream,@Image_type,@ArtikelGroep,@ArtikelMaat,@Aantal,@Vestiging,@ArtikelNaam,@ContactPersoon,@DatumOnline)", myConnection)
32
33 ' Mark the Command as a Text
34 myCommand.CommandType = CommandType.Text
35
36 ' geef alle parameters mee aan het command
37 Dim Image_title As New SqlParameter("@Image_title", SqlDbType.VarChar)
38 Image_title.Value = txtImgTitle.Text
39 myCommand.Parameters.Add(Image_title)
40
41 Dim Image_stream As New SqlParameter("@Image_stream", SqlDbType.Image)
42 Image_stream.Value = imageContent
43 myCommand.Parameters.Add(Image_stream)
44
45 Dim Image_type As New SqlParameter("@Image_type", SqlDbType.VarChar)
46 Image_type.Value = imageType
47 myCommand.Parameters.Add(Image_type)
48
49 Dim ArtikelGroep As New SqlParameter("@ArtikelGroep", System.Data.SqlDbType.NVarChar)
50 ArtikelGroep.Value = ddl1.SelectedValue
51 myCommand.Parameters.Add(ArtikelGroep)
52
53 Dim ArtikelMaat As New SqlParameter("@ArtikelMaat", System.Data.SqlDbType.NVarChar)
54 ArtikelMaat.Value = ddl2.SelectedValue
55 myCommand.Parameters.Add(ArtikelMaat)
56
57
58 Dim Aantal As New SqlParameter("@Aantal", System.Data.SqlDbType.NVarChar)
59 Aantal.Value = ddl3.SelectedValue
60 myCommand.Parameters.Add(Aantal)
61
62 Dim Vestiging As New SqlParameter("@Vestiging", System.Data.SqlDbType.NVarChar)
63 Vestiging.Value = ddl4.SelectedValue
64 myCommand.Parameters.Add(Vestiging)
65
66 Dim ArtikelNaam As New SqlParameter("@ArtikelNaam", System.Data.SqlDbType.NVarChar)
67 ArtikelNaam.Value = tb6.Text
68 myCommand.Parameters.Add(ArtikelNaam)
69
70 Dim ContactPersoon As New SqlParameter("@ContactPersoon", System.Data.SqlDbType.NVarChar)
71 ContactPersoon.Value = tb1.Text
72 myCommand.Parameters.Add(ContactPersoon)
73
74 Dim DatumOnline As New SqlParameter("@DatumOnline", System.Data.SqlDbType.NVarChar)
75 DatumOnline.Value = tb2.Text
76 myCommand.Parameters.Add(DatumOnline)
77
78 Try
79 myConnection.Open()
80 myCommand.ExecuteNonQuery()
81 myConnection.Close()
82
83 Response.Redirect("toevoegen.aspx")
84 Catch SQLexc As SqlException
85 Response.Write("Insert Failure. Error Details : " & SQLexc.ToString())
86 End Try
87
88
89 End Sub
90 End class
 

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