Question

well in a database is saved a binary code (this is a *.jar)
i need to download this code (with a select query) and Rebuild this file

What are the setps for convert since a String to a File?

someone told me i need convert it to array byte, but i dont know how to convert a String to a array byte… what are the best steps?

this code return me a table

Public Function ConseguirCatalogo() As DataTable


        Return conn.RegresarTabla("select archivo from catalogo where id= (select id from periodos where actual=1)")

    End Function

and this code i get the String

Private Sub EnviarArchivo() ‘para el catalogo

Dim MyTable As DataTable = consultas.ConseguirCatalogo()
Dim binarycode As String = MyTable.Rows(0)(0).ToString()

End Sub

now what are the next setp for convert it finally to a file? ( it is a *.jar)

Answer 1

When you have converted the data into a string, it’s already ruined. You should get the data as a byte array directly:

Dim binarycode As Byte() = DirectCast(MyTable.Rows(0)(0), Byte())