Download Files From Web With Progressbar

[S-One]

Also there are some ! according to VB with the default project. (I am now using an exact copy of webfiledownloader.vb in my program)

Warning 1 Variable 'FS' is used before it has been assigned a value. A null reference exception could result at runtime. I:\Documents and Settings\Sebas\Mijn documenten\Visual Studio 2005\Projects\FileTransfer\FileTransfer\WebFileDownloader.vb 70 21 FileTransfer

Warning 2 Function 'FormatFileSize' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used. I:\Documents and Settings\Sebas\Mijn documenten\Visual Studio 2005\Projects\FileTransfer\FileTransfer\WebFileDownloader.vb 99 5 FileTransfer

Hmm, i have converter my project from .net 2003 to 2005 and i also get this Warning, weird, but there is return

also i get warning abour DialogResult.no, yes, or whatever is used...
i have resolved this with

System.Windows.Forms.DialogResult....

EDIT:
ok i have resolved FormatFileSize Warning Case else is missing:

                Select Case Size / KB
                    Case Is < 1000
                        Return (Size / KB).ToString("N") & "KB"
                    Case Is < 1000000
                        Return (Size / MB).ToString("N") & "MB"
                    Case Is < 10000000
                        Return (Size / MB / KB).ToString("N") & "GB"
                    Case Else
                        Return Size.ToString & "bytes"
                End Select

Matt can you explain this please ("D" & "N" is format right):
Size.ToString("D") .ToString("N")
also cant find help about URL.IndexOf("/"c) and URL.LastIndexOf("/"c)
what is c for ? (description is Char, but please explain

thx in advance !

[kleinma]

Hmm, i have converter my project from .net 2003 to 2005 and i also get this Warning, weird, but there is return

also i get warning abour DialogResult.no, yes, or whatever is used...
i have resolved this with

System.Windows.Forms.DialogResult....

EDIT:
ok i have resolved FormatFileSize Warning Case else is missing:

                Select Case Size / KB
                    Case Is < 1000
                        Return (Size / KB).ToString("N") & "KB"
                    Case Is < 1000000
                        Return (Size / MB).ToString("N") & "MB"
                    Case Is < 10000000
                        Return (Size / MB / KB).ToString("N") & "GB"
                    Case Else
                        Return Size.ToString & "bytes"
                End Select

Matt can you explain this please ("D" & "N" is format right):
Size.ToString("D") .ToString("N")
also cant find help about URL.IndexOf("/"c) and URL.LastIndexOf("/"c)
what is c for ? (description is Char, but please explain

thx in advance !

Yeah this project was originally done in VS2003 (.NET 1.1) they added in some warnings in the newer versions of VS, so that is what you were seeing.

Those fixes you made were fine.

"D" is for decimal formatting of a number as a string, and "N" is for general number formatting of a number as a string. In some cases, they may yield the same result, and in others they will not. (usually has to do with number of decimal place precision, etc..)

Here is a listing of valid numeric formats for calling ToString
http://msdn.microsoft.com/en-us/libr...9k(VS.80).aspx

The IndexOf method is a method that simply returns the numeric index of where a given character is in a string of characters.

So given the string "abccba", the character positions of the letters are as follows:

a = 0
b = 1
c = 2
c = 3
b = 4
a = 5

So if I were to get the indexof("a"c), it will return 0, as a is found at position 0 in this string, however getting lastindexof("a") does the same thing, but starts at the end of the string, in which case it will find a in position 5, so it will return a 5.

the c after the specified character is just to tell the compiler "this is a datatype char, not a string with only 1 character". By default VB thinks anything in quotes is a string.