get picture from database(close) - vb.net

Question

this is my success code:
Private Sub dg1_CellClick(sender As Object, e As DataGridViewCellEventArgs) Handles dg1.CellContentClick
Label5.Text = dg1.Item(0, e.RowIndex).Value
Label6.Text = dg1.Item(2, e.RowIndex).Value
con.ConnectionString = "Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\USERS\USER\DOWNLOADS\SDP(BACKUP1)\SDP(BACKUP)\SDP.MDF;Integrated Security=True"
con.Open()
cmd.Connection = con
cmd.CommandText = "select picture from Announcement where name = #name"
cmd.Parameters.AddWithValue("#name", dg1.CurrentRow.Cells(0).Value())
da.SelectCommand = cmd
Dim imageData As Byte() = DirectCast(cmd.ExecuteScalar(), Byte())
If Not imageData Is Nothing Then
Using ms As New MemoryStream(imageData, 0, imageData.Length)
ms.Write(imageData, 0, imageData.Length)
PictureBox2.Image = Image.FromStream(ms, True)
End Using
End If
End Sub
i had success get my picture from database. which add paramater to name, then parameter name with #name.

Answer 1

You're not loading a picture from a DataGridView at all. You're trying to query a database and it's failing. Nothing to do with grids or images. Plain and simple, you've written bad SQL code. If you're going to include a text literal then it needs to have single quotes around it. Better still, do it properly and use parameters.
The issue is, as I have said, in your SQL code:
cmd.CommandText = "select picture from Announcement where name =" & dg1.Item(0, e.RowIndex).Value & ""
You are inserting a value for the name column into that SQL code so it becomes text literal. As I said, text literals require single quotes. Where are your single quotes? You don't have any. That's the issue. If you were going to use string concatenation like that, which you should not, then it would need to look like this:
cmd.CommandText = "select picture from Announcement where name = '" & dg1.Item(0, e.RowIndex).Value & "'"
If you were to do it properly, which involves using parameters, as I said, then it would look something like this:
cmd.CommandText = "select picture from Announcement where name = #name"
cmd.Parameters.AddWithValue("#name", CStr(dg1.Item(0, e.RowIndex).Value))
or like this:
cmd.CommandText = "select picture from Announcement where name = #name"
cmd.Parameters.Add("#name", SqlDbType.VarChar, 50).Value = CStr(dg1.Item(0, e.RowIndex).Value)