How to check if file exists in a Windows Store App?

Is there any other way of checking whether a file exists in a Windows Store app?

try
{
    var file = await ApplicationData.Current.LocalFolder.GetFileAsync("Test.xml");
    //no exception means file exists
}
catch (FileNotFoundException ex)
{ 
    //find out through exception 
}

Solution 1:

According to the accepted answer in this post, there is no other way at the moment. However, the File IO team is considering changing the the api so that it returns null instead of throwing an exception.

Quote from the linked post:

Currently the only way to check if a file exists is to catch the FileNotFoundException. As has been pointed out having an explicit check and the opening is a race condition and as such I don't expect there to be any file exists API's added. I believe the File IO team (I'm not on that team so I don't know for sure but this is what I've heard) is considering having this API return null instead of throwing if the file doesn't exist.

Solution 2:

This may be old, but it looks like they've changed how they want you to approach this.

You're supposed to attempt to make the file, then back down if the file already exists. Here is the documentation on it. I'm updating this because this was the first result on my Google search for this problem.

So, in my case I want to open a file, or create it if it doesn't exist. What I do is create a file, and open it if it already exists. Like so:

save = await dir.CreateFileAsync(myFile, CreationCollisionOption.OpenIfExists);

Solution 3:

I stumbled on to this blog post by Shashank Yerramilli which provides a much better answer.

I have tested this for windows phone 8 and it works. Haven't tested it on windows store though

I am copying the answer here

For windows RT app:

public async Task<bool> isFilePresent(string fileName)
 {
    var item = await ApplicationData.Current.LocalFolder.TryGetItemAsync(fileName);
    return item != null;
 }

For Windows Phone 8

 public bool IsFilePresent(string fileName)
 {
     return System.IO.File.Exists(string.Format(@"{0}\{1}", ApplicationData.Current.LocalFolder.Path, fileName);
 }

Check if a file exists in Windows Phone 8 and WinRT without exception