C# trial and error method for correct/wrong filepath

I am using VS 2005 (.net version > 2.0+) to create a windows application.

In my application I give relative path to access the file. the file might exist in any of the known folders (say 2 in number) images1, images2, I need to check out开发者_StackOverflow which filepath is correct and which isn't, using some if conditions and bool variables. accordingly I need to point and load that image in my form.

How can I do this?

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You're looking for the Path.Combine and File.Exists methods.

Using LINQ:

var actualPath = possiblePaths.Select(p => Path.Combine(p, relativePath))
                              .FirstOrDefault(File.Exists);

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foreach (string folder in folders)
  if (File.Exist(folder + filename)
     dosomething

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I sense this is related to C# How to derive the relative-filepath of file located in grand-parent folder? Please read the responses.

A trial and error method would prove to be expensive

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Simply use System.IO.File.Exists where you feed it the path(s) and filename, if it returns true, the file is there.

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You'll probably need to make use of File.Exists(). Using this along with Directory.Exists() you can traverse the file system and load the appropriate file from the appropriate location

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You can check for the existence of a file with the System.IO.File.Exists(string path) method. If it's helpful, there's also an equivalent System.IO.Directory.Exists(string path).

ETA the following from comments:

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Preprocessor directives also provide a means by which code can be compiled conditionally based on the configuration. For example something like this will give you one type of behavior with a "debug" build and a different type of behavior with a "release" (well, any non-debug) build:

public void DoStuff()
{

#if DEBUG
    // The stuff in this block only happens for a DEBUG build
#else
    // The stuff in this block only happens for a non-debug build
#endif

}