how to save binary file to database - database

Question

Join Date: Dec 10
Posts: 10
caba11 is an unknown quantity at this point (<10)
how to save binary file to database
hi.
i need to save files into database...
i cant find why it is not working...
this is my code:
Public Sub importfiles(ByVal sFileName As String)
Dim cnSQL As SqlConnection
Dim cmSQL As SqlCommand
Dim strSQL
'Validate form values
'Read file into a stream
Dim fs As New FileStream(sFileName, FileMode.Open, FileAccess.Read)
Dim myData(fs.Length) As Byte
fs.Read(myData, 0, fs.Length)
fs.Close()
Try
'Build SQL
strSQL = "insert into data_cesta(ID, cesta) values (#ID, #cesta)"
cnSQL = New SqlConnection("Data Source=.;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True")
cmSQL = New SqlCommand(strSQL, cnSQL)
cmSQL.Parameters.Add(New SqlParameter("#ID", SqlDbType.Int)).Value = ID
cmSQL.Parameters.Add(New SqlParameter("#cesta", SqlDbType.NText)).Value = myData
' cmd2.Parameters.Add("#ID", SqlDbType.Int).Value = ID
' cmd2.Parameters.Add("#cesta", SqlDbType.NText).Value = myData
'Open connection and execute the command
cnSQL.Open()
cmSQL.ExecuteNonQuery()
'Close and clean up objects
cnSQL.Close()
cmSQL.Dispose()
cnSQL.Dispose()
Catch ex As SqlException
MsgBox(ex.Message, MsgBoxStyle.Critical, "SQL Error")
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Critical, "General Error")
End Try
End Sub
without try it says "cmSQL.ExecuteNonQuery()"-"Failed to convert parameter value from a DataGridViewTextBoxColumn to a Int32."

Answer 1

It looks as though you are loading some file paths into a DataGrid before having them processed into your database.
By default, your ID field is being passed to the procedure as the DataGridViewTextBoxColumn object within the DataGrid. You need to retrieve the text within that object.
You can do so by accessing the associated DataGridViewTextBoxCell object on the row being processed. Within the DataGridViewTextBoxCell object is a property called "Value" which will have the ID value you need.
Without seeing more code, it's hard to give you the exact code, but check out the DataGridViewCell object for some helpful code, since the TextBoxCell inherits from this class.