Option Strict and FileGet

[Guest makai]

the following code works just fine:

Public Class Form1
   Inherits System.Windows.Forms.Form

   Structure x
       Dim j As Short
   End Structure

   Private Sub Button1_Click(ByVal sender As System.Object, _
       ByVal e As System.EventArgs) Handles Button1.Click

       Dim y As x
       FileOpen(1, "c:\t1.txt", OpenMode.Random, , , Len(y))
       FileGet(1, y, 1)
       FileClose(1)

       MsgBox(y.j)
   End Sub
End Class

 

but if I put in

Option Strict On

 

the line

FileGet(1, y, 1)

 

will not compile due to the fact that y is not in the overloaded parameter list

 

 

1. Does anyone know the correct conversion code?

 

2. I like the idea of sticking with Strict On - is this not a good idea?

Edited December 10, 2002 by Thinker

[divil]

The best answer is, don't use FileOpen etc. They are pretty poor methods supplied by the VisualBasic runtime of accessing files, and there are much better methods present under the System.IO namespace.

 

I'm not sure how you'd solve your problem if you remained using the VB methods, possibly just read in a Short (which there is an overload for) and put it in the structure.

 

And yeah, you should always have Option Strict on.

[Guest makai]

funny everyone heavily derides my use of these File functions - but it is the only way I can access the data

 

I am willing to bet that no one has tried Random Access of data into Structures with fixed length strings (or fixed arrays) - that would make a great tutorial if someone can do it with any kind of elegance

 

 

I have built a class to do sequential access using FileStream but to me it looks so crazy to reinvent something that is already intrinsic (and simpler) already in the language

 

everyone points to speed - but it is a nonissue - it is already 100 times faster than I require

[Guest makai]

if anyone reads this thread this is the answer:

 

Dim temp As ValueType = CType(y, ValueType)

FileGet(fHandle, temp, n)

y = CType(temp, x)

[rt3]

Wow, i know this is an old post but in case you ever read this makai, i have one word for you.

 

Thanks!