I want to write a code in C# that reads a text file in Android and if it doesn't exist, create it. I want my application to read the same file everytime I run my App and create that file the first time I open my app.I wrote this code but it doesn't work.It only creates a directory if it doesn't exist but it doesn't create my text file.Thank you for your answer in advance. string rootPath = Android.App.Application.Context.GetExternalFilesDir( null ).ToString(); var filePathDir = Path.Combine(rootPath, "PhoenixWallet/" ); if (!File.Exists(filePathDir)) { Directory.CreateDirectory(filePathDir); } bitcoinPrivateKeysFile = filePathDir + "bitcoinwallets.phoenixbtcwallet" ; string bitcoinprivateKeyItem; if (File.Exists(bitcoinPrivateKeysFile) != null ) { StreamReader sr = File.OpenText(bitcoinPrivateKeysFile); while (!sr.EndOfStream) { bitcoinprivateKeyItem = sr.ReadLine(); bitcoinprivKeys.Add(bitcoinprivateKeyItem); } Console.WriteLine( "File Exists" ); sr.Close(); } else { Key bitcoinKey = new Key(); BitcoinSecret bitcoinsecret = new BitcoinSecret(bitcoinKey, network); StreamWriter sw; sw = File.CreateText(bitcoinPrivateKeysFile); sw.WriteLine(bitcoinsecret.PrivateKey); Console.WriteLine( "File Does not Exist" ); sw.Close(); }

Its too hard to read, can you re-post your question with formatting? However, have you read the documentation for the same https://docs.microsoft.com/en-us/xamarin/android/platform/files/

Answer

Android Write and Read Text File in C#

Parham Torabi

1.6k

I want to write a code in C# that reads a text file in Android and if it doesn't exist, create it. I want my application to read the same file everytime I run my App and create that file the first time I open my app.I wrote this code but it doesn't work.It only creates a directory if it doesn't exist but it doesn't create my text file.Thank you for your answer in advance.

string rootPath = Android.App.Application.Context.GetExternalFilesDir(null).ToString();
var filePathDir = Path.Combine(rootPath, "PhoenixWallet/");
if (!File.Exists(filePathDir)) {
Directory.CreateDirectory(filePathDir);
}
bitcoinPrivateKeysFile = filePathDir + "bitcoinwallets.phoenixbtcwallet";
string bitcoinprivateKeyItem;
if (File.Exists(bitcoinPrivateKeysFile) != null) {
StreamReader sr = File.OpenText(bitcoinPrivateKeysFile);
while (!sr.EndOfStream) {
bitcoinprivateKeyItem = sr.ReadLine();
bitcoinprivKeys.Add(bitcoinprivateKeyItem);
}
Console.WriteLine("File Exists");
sr.Close();
} else {
Key bitcoinKey = new Key();
BitcoinSecret bitcoinsecret = new BitcoinSecret(bitcoinKey, network);
StreamWriter sw;
sw = File.CreateText(bitcoinPrivateKeysFile);
sw.WriteLine(bitcoinsecret.PrivateKey);
Console.WriteLine("File Does not Exist");
sw.Close();
}