How to check if file is exist in RDLC (by Report Builder 2.0)?

Question

User1997404758 posted

I have an rdlc. i want to check if file is exists - if then - so insert an image, else, insert other image.

i tried to use an method as:

 

Public Function FileIsExists(ByVal filePath As String) As Boolean
    If System.IO.File.Exists(filePath) = True  Then
     Return True
    Else : Return False
       End If
 End Function

 

but it's method always return false.. also for exists files..

Answer 1

User-434868552 posted

@ kondor

(a) System.IO.File.Exists(filePath) returns a boolean, so you do not need "- True"

(b) your code looks good, so your problem is likely the value of "filePath" ...
     use the debugger and/or display the value of "filePath"

(c) unless you intend to add additional features to your function, it is redundant because you can write your "If System.IO.File.Exists" inline.

g.

Answer 2

User1997404758 posted

right, the correct method is:

Public Function FileIsExists(ByVal filePath As String) As Boolean
   Return System.IO.File.Exists(filePath) 
 End Function

but it always return false, 
how to can i to debug? 
it's a RDLC file that use this method??it's possible to attach a file to here? for illustrate that?

Answer 3

User-434868552 posted

@ kondor

file type does not matter; System.IO.File.Exists is file type agnostic ...

other causes may be that you do not have the appropriate access rights to the file.

use the debugger ... it you do not know how to use the debugger, this article may help:  http://www.codeproject.com/KB/cs/MasteringInDebugging.aspx

g.

Answer 4

User1997404758 posted

I think there's some confusion.
This is RDLC file - which was created through the Report Builder 2.0 -
Not through VS.
VS does not know debug RDLC file..

Answer 5

User-434868552 posted

@ kondor

Perhaps i do not understand your goals ... if you are simply trying to determine whether a file exists, the .NET Framework serves that purpose.

This code runs in LINQPad 4:

Sub Main
	If FileIsExists("c:\windows\system32\notepad.exe") Then
    Debug.Print("Found It")
    Else Debug.Print("Lost it")
    End If
	If FileIsExists("c:\windows\system32\MeaningOfLife.exe") Then
    Debug.Print("Life has meaning")
    Else Debug.Print("Life is meaningless")
    End If
End Sub

Public Function FileIsExists(ByVal filePath As String) As Boolean 
   Return System.IO.File.Exists(filePath)  
 End Function

it produces this output

Found It
Life is meaningless

N.B.:  this is simpler (If System.IO.File.Exists is inline where it belongs in most cases):

Sub Main
	If System.IO.File.Exists("c:\windows\system32\notepad.exe") Then
    Debug.Print("Found It")
    Else Debug.Print("Lost it")
    End If
	If System.IO.File.Exists("c:\windows\system32\MeaningOfLife.exe") Then
    Debug.Print("Life has meaning")
    Else Debug.Print("Life is meaningless")
    End If
End Sub

 g.