Storing Byte Array In Sql Server

Jan 8, 2006

Hello, I am using .net 1.1 and sql server 2000.

I want to store a byte array, but it seems that only a string is stored there.

Code:

SHA512 sha = new SHA512Managed();

byte[] ReturnedPasswordByte = sha.ComputeHash(ToCryptByte);




MyGenericCommand.Parameters.Add("@Password", ReturnedPasswordByte);

MyConnection.Open();
MyGenericCommand.ExecuteNonQuery();
MyConnection.Close();


If I select the record later, all I get is "System.Byte[]" (as string)

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Mar 26, 2008

hi
i am getting an error with my code, it says 'value of type byte canot be converted to 1 dimensional array of byte' do you know why and how i can correct this error, the follwoing is my code.
can anyone help me correct the error and let me know ow to solve it
thanks for any help givenPublic Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequestDim myConnection As New Data.SqlClient.SqlConnection("ConnectionString")
myConnection.Open()
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dr.Read()
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Feb 28, 2008

I€™ve inherited a project from one of the guys on our team who will be out sick for a while. He developed two for marshaling data between System.Drawing.Image and System.Byte(). He€™s storing the byte array data in a database image field.

I€™ve retrieved the byte array data from his database image fields and have successfully converted them to images using his ConvertByteArrayToImage method below. I have also converted and image to a byte array with his ConvertImageToByteArray method below and succfully stored the data in a database image field. However, when I retrieve the byte array data that I stored in the database the last line in his ConvertByteArrayToImage method throws an exception (Parameter is not valid). I€™ve not been able to find a working copy of his code that€™s storing the byte array data. Does anyone see anything I€™m overlooking?

Imports System.Drawing
Imports System.IO

Public Sub InsertImage(ByVal pFilename As String)

Try

Dim lImage As Image
Dim lBA() As Byte
Dim lSQL As String
Dim lQuery As Alcon.SQLServer.Database.clsQuery
Dim lParameters As New Alcon.SQLServer.Database.clsParameters

lImage = Image.FromFile(pFilename)

ConvertImageToByteArray(lImage, lBA)

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lSQL = ""
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lSQL += "[SerialNumber], "
lSQL += "[ProcessedDate], "
lSQL += "[CartonLabelImage]) "
lSQL += "VALUES ("
lSQL += "@SerialNumber, "
lSQL += "@ProcessedDate, "
lSQL += "@CartonLabelImage "
lSQL += ")"

lParameters.Add("@SerialNumber", SqlDbType.VarChar, ParameterDirection.Input, mSerialNumber)
lParameters.Add("@ProcessedDate", SqlDbType.DateTime, ParameterDirection.Input, Now)
lParameters.Add("@CartonLabelImage", SqlDbType.Image, ParameterDirection.Input, lBA)

' Execute query
lQuery.Execute(lSQL, lParameters)

Catch ex As Exception
Throw
End Try

End Sub

ConvertByteArrayToImage(ByVal pBA() As Byte, ByRef pImage As Image)

Try

' Declaration
Dim lMS As MemoryStream

' Initialization
lMS = New MemoryStream(pBA, 0, pBA.Length)
lMS.Write(pBA, 0, pBA.Length)
lMS.Position = 0

' Create image
pImage = Image.FromStream(lMS, True)

Catch ex As Exception
Throw
End Try

End Sub

ConvertImageToByteArray(ByVal pImage As Image, ByRef pBA() As Byte)

Try

' Declaration
Dim lBM As Bitmap
Dim lBR As BinaryReader
Dim lMS As New MemoryStream

' Initialization
lBM = New Bitmap(pImage)
lBM.Save(lMS, Imaging.ImageFormat.Png)
lBR = New BinaryReader(lMS)

' Create byte array
pBA = lBR.ReadBytes(lMS.Length)

Catch ex As Exception
Throw
End Try

End Sub

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Any help on this greatly appreciated...

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,
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Save An Image To A Byte[] Variable From A Database

Oct 10, 2006

i'm trying to read an image file from a database(ms-sql, .mdf) with type image.  Anyone have any ideas on how to do this?  I have a table adapter created but could not assign it to my byte[] variable.  Thanks in advance.

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