"Parameter is not valid" when using Image.fromStream method

I am struggling for hours now with this issue.

If result = Windows.Forms.DialogResult.OK Then
  Dim path As String = OpenFileDialog1.FileName
  Dim img As Image = Image.FromFile(path)
  Using mStream As New MemoryStream()
    img.Save(mStream, img.RawFormat)
    Dim bArr As Byte() = mStream.ToArray()
  End Using
  Dim params As New List(Of SqlParameter)
  params.Add(New SqlParameter("@Image", bArr))
  CallSP("UpdateImageSP", params)
End If

This will actually update the database, in a varbinary column, with the value: 0x89504E470D0A1A0A0000000D49484452000004120000041208060000001258D9C6000000017352474200AECE1CE900000004

Time to retrieve the image & show it in a picturebox:

Dim dtIcon As DataTable = DataTableGet("getImageSP")
If dtIcon IsNot Nothing AndAlso Not dtIcon.Rows(0)("Image") Is DBNull.Value Then
  Dim imageData As Byte() = DirectCast(dtIcon.Rows(0)("Image"), Byte())
  If imageData.Length > 0 Then
    Using mStream As New MemoryStream(imageData)
      Dim x As Image = Image.FromStream(mStream) --<--ERROR HERE !!
    End Using
    PictureBox1.BackgroundImage = x
  End If
End If

The error is "An unhandled exception of type 'System.ArgumentException' occurred in System.Drawing.dll Additional information: Parameter is not valid."

I've tried several samples of code that I found, the result was always this one. Anyone knows what's the problem here?

Solution

The image could be getting saved incorrectly when uploading to the database, or you could have an issue converting it back.

One thing I would do is declare the type of your byte array going to SQL:

params.Add(New SqlParameter("@Image", bArr, SqlDbType.VarBinary,-1))

When loading the image to the database, you are not using the data as an image type. It would be easier to get the binary data using File.ReadAllBytes:

Dim bArr As Byte()
bArr = File.ReadAllBytes(path)

Also, you can test to confirm that the saved data from the database looks correct by trying save it to disk instead of loading into a picturebox. If you cannot open it as an image there is something wrong with the saved data:

Dim stream As New FileStream([Some Test Path], FileMode.Create, FileAccess.Write)
stream.Write(imageData, 0, imageData.Length)
stream.Close()