how to update image using database in vb.net - vb.net

Question

what is the problem of this code?? i got a error for the GDI+ and i dont know to solve.
Private Sub saveEmployee()
Dim ms As New MemoryStream
PictureBox1.Image.Save(ms, PictureBox1.Image.RawFormat)--i got error in this line..A generic error occurred in GDI+.
Dim arrPic() As Byte = ms.GetBuffer()
Dim cmdEmp As New MySqlCommand
Dim sqlEmp As String
sqlEmp = "update tbl_employee set emPic=#emPic where emID='" & lbl_empID.Text & "'"
With cmdEmp
.Parameters.AddWithValue("#emPic", arrPic)
.ExecuteNonQuery()
End With
End Sub

Answer 1

Try replacing that line with this :
Dim bm as Bitmap = new Bitmap(PictureBox1.Image)
bm.Save(ms, PictureBox1.Image.RawFormat)
The reason could be that the Image is being used by the PictureBox. Its also good practice to have the following instead :
Using ms As MemoryStream = New MemoryStream()
Dim bm as Bitmap = new Bitmap(PictureBox1.Image)
bm.Save(ms, PictureBox1.Image.RawFormat)
Dim arrPic() As Byte = ms.GetBuffer()
Dim cmdEmp As New MySqlCommand
Dim sqlEmp As String
sqlEmp = "update tbl_employee set emPic=#emPic where emID=#emID"
With cmdEmp
.Parameters.AddWithValue("#emPic", arrPic)
.Parameters.AddWithValue("#emID", int.Parse(lbl_empID.Text))
.ExecuteNonQuery()
End With
End Using
This way the MemoryStream will get Disposed after being used. And adding #emID as a parameter is safer.

Answer 2

RESOLVED!!!
Bind picture box to the datasource field using the Advance tab in the DataBindings section. Use the ImageLocation property instead of image. Then change the Update mode to NEVER. but how abt the update ??? Use a textbox and hide behind the Picture box [with visible = true]. Bind textbox to same datasource. THAT IS!!!
image displays directly in picture box whilst the textbox TextChanged property handles whether there is UPDATE or Not. took me a while but it works fine now. good luck as u code... ~ SAM, GHANA