Develop Reference

How to create file text in "AppData\Roaming" for any user in C#

I'd like save date my app but I'm not knowing if app save for different users, Example if "andy" I can't use ("C:\Users\Game maker\AppData\Roaming") ,So How to create file in "AppData\Roaming\MaxrayStudyApp" for any user .
Computer myComputer = new Computer();
myComputer.FileSystem.WriteAllText(#"C:\Users\Game maker\AppData\Roaming\MaxrayStudy\data.txt","", false);

Almost a duplicate of this one: Environment.SpecialFolder.ApplicationData returns the wrong folder
Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
That should get the folder you need then use Path.Combine() to write to a directory in that folder.
var roamingDirectory = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
var filePath = Path.Combine(roamingDirectory, "MaxrayStudy\\data.txt");

I restart my windows and I write this
string filePath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
filePath= (filePath+#"\MaxrayStudyApp\data.txt");
string path =Convert.ToString(filePath);
using (System.IO.StreamWriter file =
new System.IO.StreamWriter(filePath,false)){
file.WriteLine(" XP : 0");}

Saving images to a project folder in asp.net/c#

In my method, I'm trying to save an image in a folder in the directory of my project. I have tried just putting the direct filepath of the folder, but that gives me an error when the project runs.
Is there a built-in extension of some kind in c# that would allow me to save this image in a folder in my directory; or way to simply access my directory without drilling to where my project is saved on my computer?
private void CreateBarcode()
{
var bitmapImage = new Bitmap(500,300);
var g = Graphics.FromImage(bitmapImage);
g.Clear(Color.White);
UPCbarcode barcode = new UPCbarcode(UPCbarcode.RandomGeneratedNumber(), bitmapImage, g);
string filepath=#"images/image1.jpg";
bitmapImage.Save(filepath,System.Drawing.Imaging.ImageFormat.Jpeg);
}

You can always use the AppData folder,
string path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)

Assuming the "Image" folder is in the root directory of your Project use:
Server.MapPath("~/Image" + filename)
you can check if the file already exist at a location by :
if (!File.Exists(filePath))
{
// Your code to save the file
}

I can guess that there is similarity in the name of the image file
try putting it under a different name
like
string filepath = # "images / blabla or AI.jpg";

Use this
string filepath= Application.StartupPath + "\images\image1.jpg";
bitmapImage.Save(filepath,System.Drawing.Imaging.ImageFormat.Jpeg);

Having dataset in another folder

I have the Windows Form Application which works with 2 data sets(text files). How can change the path of text files from C Drive into the Documents folder with following adress: Libraries\Documents?
If I want copy them into the desktop what can be the path?
PS: I copy the data sets into Documents and change the
StreamReader fileitem = new StreamReader("c:\\dataset.txt");\
into:
StreamReader fileitem = new StreamReader("Libraries\Documents\dataset.txt");
But it doesnot work.
An idea?

You need Environment.GetFolderPath.
string myDocuments = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
string desktop = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
Don't concatenate strings to create path, use Path.Combine instead. So when you need subfolder of desktop you'll use
string subFolder = Path.Combine(desktop,"MySubFolderName");
So in your case
StreamReader fileitem = new StreamReader(Path.Combine(desktop,"dataset.txt"));

string documents = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)
StreamReader fileitem = new StreamReader(Path.Combine(documents, "dataset.txt");

Issue in File path

In my project there is a folder and in that folder there is text file. I want to read that text file
string FORM_Path = #"C:\Users\...\Desktop\FormData\Login.txt";
bool first = true;
string line;
try
{
using (StreamReader streamReader = File.OpenText(FORM_Path))
{
line = streamReader.ReadLine();
}
}
but I always get an error - file does not exist. how can i solve the problem in the path of text file.

Make sure your file's properties are set to copy the file to output directory. Then you can use the following line to get full path of your text file:
string FilePath = System.IO.Path.Combine(Application.StartupPath, "FormData\Login.txt");

You path is not in correct format. Use #".\FormData\Login.txt" instead of what you have

You are trying to give relative path instead of physical path. If you can use asp.net use Server.MapPath
string FORM_Path = Server.MapPath("~/FormData/Login.txt");
If the text file is in execution folder then you can use AppDomain.BaseDirectory
string FORM_Path = AppDomain.CurrentDomain.BaseDirectory + "FormData\\Login.txt";
If it is not possible to use some base path then you can give complete path.

Avoid using relative paths. Instead consider using the methods in the Path class.
Path.Combine
Path.GetDirectoryName
Step 1: get absolute path of the executable
var path = (new System.Uri(Assembly.GetEntryAssembly().CodeBase)).AbsolutePath;
Step 2: get the working dir
var dir = Path.GetDirectoryName(path);
Step 3: build the new path
var filePath = Path.Combine(dir , #"FormData\Login.txt");

GetTempFileName() and saving to the AppData folder

In the below code, the files are being saved in the debug folder of the project, I want to store the files in the appdata folder under a generic specified folder!
AViewModel vm = DataContext as AViewModel;
var table = vm.FileSelectedItem;
if (table != null)
{
var filename = System.IO.Path.GetTempFileName();
File.WriteAllBytes(table.FileTitle, table.Data);
Process prc = new Process();
prc.StartInfo.FileName = table.FileTitle;
prc.Start();
}
//table.FileTitle is the name of the file stored in the db
// eg:(test1.docx, test2.pdf, test3.txt, test4.xlsx)
//table.Data is public byte[] Data { get; set; } property
// which stores the files coming from the db.
I am looking at GetFolderPath and trying something like this now
System.IO.Path.GetTempFileName(
Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData));
Thanks for any replys!

GetTempFileName returns a full path to a file in the user's temp path. You can't use that to create a file within a specific folder.
Given that you want to store within the AppData folder already, perhaps you are after something more like:
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "YourCompany\\YourProduct\\Output");
var filename = Path.Combine(path, table.FileTitle);
File.WriteAllBytes(filename, table.Data);
Process.Start(filename);

In case you want to create randomly named file under AppData, you can try
Guid.NewGuid().ToString("N")
That'll give you random string with reasonable certainty it is unique. For folder under AppData:
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), Guid.NewGuid().ToString("N"));
Note: at least put it into some subfolder, AppData is folder shared with all other apps.