I am creating a text file and after that I am trying to write some text in that file.but when writing text,it's generating exception that process cannot access file because it's being used by another process. Kindly someone help :( Thanks in advance.
Here is my code
dt_Loc = loc1_ctab.GetEmpLocInfo(Session["empcd"].ToString());
string str = DateTime.Now.ToString("dd-mmm-yyyy");
str = dt_Loc.Rows[0]["loc1_abrv"].ToString() + "-" + str;
string path = FilesPath.Path_SaveFile + str + ".txt";
if (!File.Exists(path))
{
File.Create(path);
TextWriter tw = new StreamWriter(path);
tw.WriteLine(txt_comments.Text);
tw.Close();
}
Remove the File.Create since it opens a FileStream for the file.This results in the file being open and hence you get the exception that the file is being used by another process.
if (!File.Exists(path))
{
using(StreamWriter sw = new StreamWriter(path))
{
sw.WriteLine(txt_comments.Text);
}
}
Your code giving such error because, the method Create Creates or overwrites a file in the specified path. which will return A FileStream that provides read/write access to the file specified in path. So at the time of executing the writemethod, the file is being used by the returned FS. you can use this in the following way:
using (FileStream fs = File.Create(path))
{
Byte[] info = new UTF8Encoding(true).GetBytes(txt_comments.Text);
// Add some information to the file.
fs.Write(info, 0, info.Length);
}
You can Make it simple by using File.WriteAllText which will Creates a new file, write the contents to the file, and then closes the file. If the target file already exists, it is overwritten.
string path =FilesPath.Path_SaveFile + str + ".txt";;
if (!File.Exists(path))
{
File.WriteAllText(path, txt_comments.Text);
}
Related
So I'm making a Cosmos OS and I am having some trouble. I have this code that makes a file. what it does is it asks What is the name of the file and extension then what is the files contents then makes the file. The Problem is is that it only saves to main directory of 0:\ and doesn't work when you make a file while in a directory like 0:\TEST. This is the code I have for the file creator. I want to know if it's possible to make it save the file to the directory you are currently in.
Console.Write("File Name (put in the extension name):");
var finput = Console.ReadLine().ToLower();
string fileName = finput;
// Check if file already exists. If yes, delete it.
if (File.Exists(fileName))
{
File.Delete(fileName);
}
Console.Write("File Contents:\n");
var text = Console.ReadLine().ToLower();
using (FileStream fs = File.Create(fileName))
{
// Add some text to file
Byte[] title = new UTF8Encoding(true).GetBytes(text);
fs.Write(title, 0, title.Length);
}
Console.WriteLine("File Made!");
This may be a late answer, but try this:
var dir = Directory.GetCurrentDirectory;
var file = (filename);
File.Create(dir + "\\" + file);
I haven't checked this code but it should be something like this. This (should) do the same as your code above.
How can I create and then modify writing on this file?
string fileName = #"C:\...\MioFile.txt";
In main:
File.CreateText(fileName);
Then when I would edit the file by adding text.
StreamWriter writer = new StreamWriter(fileName);
sw.WriteLine("Hello"+variable);
sw.Close();
But the file is empty and I cannot write anything.
I would like create a file.txt and I would like for this file to always add new information every time I call it in writing mode. A kind of "log file".
Use File.AppendAllText instead of StreamWriter. Its simple:
File.AppendAllText(filename, "Hello"+variable);
You have sw.WriteLine, But your streamwriter is called "writer". That might be the problem.
I like to use the "using" statements:
//full path
var fileName = #"C:\Users\...\Desktop\newFile2.txt";
//Get the stream in FileMode.Append (will create or open)
using (var fileStream = new FileStream(fileName,FileMode.Append))
{
//pass the fileStream into the writer.
using (var writer = new StreamWriter(fileStream))
{
writer.WriteLine("{0} => file appended", DateTime.Now);
}//dispose writer
}//dispose fileStream
I'm getting the error The process cannot access the file 'C:\Users\Ryan\Desktop\New folder\POSData.txt' because it is being used by another process. when I try to create a file and then write to it. What process is using the file?? I checked for a file.close to call after I create the file, but it doesn't exist. How do I get past this? Thanks!
Heres my code:
MessageBox.Show("Please select a folder to save your database to.");
this.folderBrowserDialog1.RootFolder = System.Environment.SpecialFolder.Desktop;
DialogResult result = this.folderBrowserDialog1.ShowDialog();
if (result == DialogResult.OK)
{
databasePath = folderBrowserDialog1.SelectedPath;
if (!File.Exists(databasePath + "\\POSData.txt"))
{
File.Create(databasePath + "\\POSData.txt");
}
using (StreamWriter w = new StreamWriter(databasePath + "\\POSData.txt", false))
{
w.WriteLine(stockCount);
}
}
Edit: Only happens when creating the file. If it already exists, no error occurs.
Actually, don't even bother using File.Create. The reason you're getting that error is because File.Create is opening up a stream on that text file.
string filePath = "databasePath + "\\POSData.txt"";
using (StreamWriter sw = new StreamWriter(filePath, true))
{
//write to the file
}
You are keeping the file open when you call File.Create (i.e. you never close the file).
StreamWriter will create the file for you if it doesn't exist, so I wouldn't bother checking yourself. You could just remove the code that checks whether it exists and creates it if it doesn't.
if (result == DialogResult.OK)
{
databasePath = folderBrowserDialog1.SelectedPath;
using (StreamWriter w = new StreamWriter(databasePath + "\\POSData.txt", false))
{
w.WriteLine(stockCount);
}
}
Note that if the file doesn't exist, the second bool parameter in the StreamWriter constructor is ignored.
File.Create also opens the file for reading/writing. As such, you're leaving an open FileStream when you File.Create.
Assuming that overwriting is OK, then you probably want to do something like this:
using (var fs = File.Create(databasePath + "\\POSData.txt"))
using (StreamWriter w = new StreamWriter(fs))
{
w.WriteLine(stockCount);
}
given that File.Create:
Creates or overwrites a file in the specified path.
The File.Create returns a FileStream object that might need to be closed.
The FileStream object created by this method has a default FileShare
value of None; no other process or code can access the created file
until the original file handle is closed.
using (FileStream fs = File.Create(databasePath + "\\POSData.txt"))
{
fs.Write(uniEncoding.GetBytes(stockCount), 0, uniEncoding.GetByteCount(stockCount));
}
I used this and it worked
`File.AppendAllText(fileName,"");`
This creates a new file, writes nothing to it, then closes it for you.
Basically I want to create a file if not existing then write message to it.
if (!File.Exists(filePath + fileName))
File.Create(filePath + fileName);
StreamWriter sr = new StreamWriter(filePath + fileName,false);
How to deal with this error?
The process cannot access the file 'c:\blahblah' because it is being used by another process.
File.Create opens a FileStream (http://msdn.microsoft.com/en-us/library/d62kzs03.aspx).
As you didn't dispose it, the file remains locked and subsequent accesses to the file will fail because of this situation if these are performed from other handles (i.e. other FileStream or the whole StreamWriter).
This code demonstrates how you should work with IDisposable objects like FileStream:
if (!File.Exists(filePath + fileName))
{
File.Create(filePath + fileName).Dispose();
using(StreamWriter sr = new StreamWriter(filePath + fileName,false))
{
}
}
Why not just use the StreamWriter constructor that takes in the file name?
StreamWriter sr = new StreamWriter(filePath + fileName);
From MSDN:
The path parameter can be a file name, including a file on a Universal Naming Convention (UNC) share. If the file exists, it is overwritten; otherwise, a new file is created.
Very minor point but you could consider using Path.Combine when concatenating file names and folder paths.
Simplify your code by using single method to create and open a file:
using (FileStream fs = File.OpenWrite(path))
{
Byte[] info = new UTF8Encoding(true)
.GetBytes("This is to test the OpenWrite method.");
fs.Write(info, 0, info.Length);
}
MSDN: (File.OpenWrite Method)
Opens an existing file or creates a new file for writing.
I'm new to C# and I'm having a bit of an issue when saving to a new file. My program has two options for saving: save & save as.
I was getting a sharing violation error when saving, but I fixed that by closing the previous filestream. However, I still cant figure out why my save as code is giving me a sharing violation error.
Here's the code:
// get a file stream from the file chooser
FileStream file = File.OpenWrite(saveFc.Filename);
// check to see if the file is Ok
bool fileOk = file.CanWrite;
if (fileOk == true)
{
// get the filename
string filename = file.Name;
// store the filename for later use
UtilityClass.filename = filename;
// get the text from textview1
string text = textview1.Buffer.Text;
// get a StreamWriter
StreamWriter writer = File.CreateText(filename);
// write to the file
writer.Write(text);
// close/save the file
writer.Close();
file.Close();
}
}
// close the file c
If you could help me figure it out that would be much appreciated. Thanks!
You're opening the same file twice:
FileStream file = File.OpenWrite(saveFc.Filename);
And:
string filename = file.Name;
StreamWriter writer = File.CreateText(filename);
Your code could probably be simplified to:
using (var writer = File.CreateText(saveFc.Filename))
{
// store the filename for later use
UtilityClass.filename = saveFc.Filename;
// get the text from textview1
string text = textview1.Buffer.Text;
// write the text
writer.Write(text);
}
If you open the file with CreateText/OpenWrite it will always be writeable (or an exception will be thrown). The using block will automatically close the writer when it exits.