Uri formats are not supported - Xtreme Visual Basic Talk

01-06-2012, 11:41 AM

pippo1111

Freshman

Join Date: Oct 2005

Posts: 31

Uri formats are not supported

Hi,

I need your help with the following code error. Please tell me what is wrong and which code to use.

I'm trying to open a CSV file to get the data out of it.
If I use the following code, it works:

Code:

Const FileName = "/table.csv"
StrWer = File.OpenText(Server.MapPath(FileName))

Unfortunately I have to use the full path as the file could be different and in different sites. If I use the following code

Code:

Const FileName = "http://www.simstrumenti.com/table.csv"
StrWer = File.OpenText(FileName)

I get and error message as following:

URI formats are not supported.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: URI formats are not supported.

Source Error:

Line 54:
Line 55: Const FileName = "http://www.simstrumenti.com/table.csv"
Line 56: StrWer = File.OpenText(FileName)
Line 57:
Line 58:

Stack Trace:

[ArgumentException: URI formats are not supported.]
System.IO.Path.NormalizePathFast(String path, Boolean fullCheck) +7493079
System.IO.Path.NormalizePath(String path, Boolean fullCheck) +36
System.IO.Path.GetFullPathInternal(String path) +21
System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) +411
System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options) +65
System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize) +87
System.IO.StreamReader..ctor(String path) +30
System.IO.File.OpenText(String path) +35
ASP.csvdata_aspx.ReadCSV() in \\boswinfs02\home\users\web\b2942\ez.yeouda\csvdata.aspx:56
ASP.csvdata_aspx.Page_Load(Object sender, EventArgs e) in \\boswinfs02\home\users\web\b2942\ez.yeouda\csvdata.aspx:9
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

01-06-2012, 12:41 PM

PlausiblyDamp

Ultimate Contributor

Forum Leader
* Expert *

Join Date: Nov 2003

Location: Wigan, UK

Posts: 1,678

The File class is for working with local files (i.e. local pc or on the local network) and not for working with resources on the internet. If you need to read from a file that you only have a full URL to then you are probably better of looking at something like the WebClient class as an alternative.

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01-06-2012, 01:45 PM

pippo1111

Freshman

Join Date: Oct 2005

Posts: 31

Thank you very much it worked!
I post you the code I used also for future readers:

Code:

Const FileName = "http://www.domain.com/table.csv"
CSVdata = fileReader.OpenRead(FileName)
Dim sr As StreamReader
sr = New StreamReader(CSVdata)
strLine = sr.ReadLine()
Do Until strLine Is Nothing
'****************************************
'*****     Insert here code to read each line    *****
'****************************************
Loop
CSVdata.Close()