C# file download is not a valid virtual path

Add a comment. Active Oldest Votes. Improve this answer. Guillaume Beauvois Guillaume Beauvois 3 3 silver badges 7 7 bronze badges. It's frowned upon to use exceptions for validation, but in this case it's about the only certain way to determine path validity.

Besides, how often does any code have to check a file path? In well written code, it should be a rare task, normally. The Overflow Blog.

Who owns this outage? User posted Hi, TransmitFile is for local files. User posted If you want read data from a web site then you can use system. Wednesday, September 19, AM. User posted Hi bryar, Money.

So you should use method like Server. MapPath to get the valid file system path. Just like Response. Improve this answer. Nerlog Nerlog 1 1 silver badge 5 5 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. User posted Hi, Yes, there is a way.

First try to check whether the path exists like below if Directory. Regards, Karthick Raju Please mark this as Answer if it helps you. User posted Hi, Unfortunatelly I receive "false" in the additional "if" for virtual paths that exists. Returns a value that indicates whether the specified character span that represents a file path contains a root.

Attempts to concatenate two path components to a single preallocated character span, and returns a value that indicates whether the operation succeeded. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Path Class Reference Is this page helpful? Please rate your experience Yes No. Any additional feedback? Namespace: System. IO Assembly: System. Note In members that accept a path as an input string, that path must be well-formed or an exception is raised.

Is this page helpful? In this article. A platform-specific separator character used to separate path strings in environment variables. ChangeExtension String, String. Combine String, String. Combine String, String, String. Combine String, String, String, String. Combine String[].