File Not Found Exception In Xamarin program

Question

This is a xamarin application for android to compress or extract a given file entered by user in the textbox. I placed the sample file in the assets folder. The function zip on button click is supposed to compress the file On entering the filename and clicking the button it is throwing a filenotfound exception even after providing path of the file located.

 namespace zipfile
 {
[Activity (Label = "zipfile", MainLauncher = true)]
public class MainActivity : Activity
{
    string t;
    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);

        // Set our view from the "main" layout resource
        SetContentView (Resource.Layout.Main);

        Button button1 = FindViewById<Button> (Resource.Id.button1);
        button1.Click += delegate {
            EditText text = FindViewById<EditText> 
                              (Resource.Id.editText2);
            if (null == text)
                return;

            t="\\zip\\zipfile\\Assets\\"+ text.Text;
            //Toast.MakeText(this,"file 
                            zipped",ToastLength.Long).Show();
            ZipOutputStream.Zip(t, t, 128);

        };

        Button button2 = FindViewById<Button> (Resource.Id.button2);
        button2.Click += delegate {
            //Toast.MakeText(this,"file 
                            unzipped",ToastLength.Long).Show();
            ZipInputStream.UnZip (t, t, 128);
        };
    }
}
 }

I am new To Xamarin Please suggest me way to handle this exception.

score 0 · Answer 1 · answered Feb 14 '14 at 14:26

You can't write to paths inside of the APK.

A simple file IO example:

string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
string filePath = Path.Combine(path, "file.txt");
using (var file = File.Open(filePath, FileMode.Create, FileAccess.Write))
using (var strm = new StreamWriter(file))
{
    strm.Write(data);
}

File Not Found Exception In Xamarin program

1 Answers1

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