C# - [STAThread] Still throws expection with Clipboard

[Sefner]

Hey everyone. I have a program that watches a .txt log file from a chat
client or a game and based on each line, triggers events. One thing I
am trying to do is send the contents of a text file to the clipboard,
then paste it to the program... Here is the code I am using...

namespace Project1
{
public partial class Form1 : Form
{

//Variable, fileStreams, FileReaders, Voice thing, and Regexes go here!

[STAThread]
public static void Main()
{
Application.Run(new Form1());
}

public Form1()
{
InitializeComponent();
}

//opens FileStream after making sure the user has opened a file
public void StreamCaller(object sender, EventArgs e)
{
if (logName!=null)
{
FileStreamer();
}
else
{
textBox1.Text = "No Log Selected";
}
}

//opens the FileStream, StreamReader, and FileSystemWatcher.
public void FileStreamer()
{
fs = new FileStream(logName, FileMode.Open,
FileAccess.Read, FileShare.ReadWrite);
sr = new StreamReader(fs);
watch = new FileSystemWatcher(logDir, "*.txt");

if (newsDialog.FileName.Length > 2)
// if it exists
{
newsFile = newsDialog.FileName;
newsStream = new FileStream(newsFile, FileMode.Open,
FileAccess.Read, FileShare.ReadWrite);
newsReader = new StreamReader(newsStream);
}

else
{
}

//FileSystemWatcher stuff...
watch.IncludeSubdirectories = true;
watch.EnableRaisingEvents = true;
watch.NotifyFilter = NotifyFilters.Size;
watch.Changed += new FileSystemEventHandler(OutputIt);

//Sets position of Stream to the end. This is so it only reads new
lines.
fs.Position = fs.Length;

textBox1.Text = "Watching...";
button2.Enabled = true;
}

//This method is called when the log file is modified. It uses Regexes
and the Contains() //method to see if the new line in the file matches
anything the should trigger something.
public void OutputIt(object source, FileSystemEventArgs e)
{
//Reads the new line.
string compare = sr.ReadToEnd();

//if statements for different things go here...

//This is the line that gives me trouble. the Clipboard.SetText() line
more specifically.
//It throws the "Current thread must be set to single thread apartment
(STA) mode before //OLE calls can be made. Ensure that your Main
function has STAThreadAttribute marked on //it." Exception. But notice
I do have the attribute on Main()

//if the line contains the string "/news" - which is the command to
bring up the news - the
//text file is read to the end, copied to clipboard, then pasted with
SendKeys. The Stream
//then goes back to the beginning of the text file and waits for the
next command.

else if (compare.Contains("/news"))
{
newsOutput = newsReader.ReadToEnd();
Clipboard.SetText(newsOutput, TextDataFormat.Text);
SendKeys.SendWait("^v");
newsStream.Position = 0;
}
else
{
}

}

//Closes all streams when a button is clicked.
public void EndStream(object sender, EventArgs e)
{
watch.EnableRaisingEvents = false;
textBox1.Text = "Not Watching";
button2.Enabled = false;
fs.Close();
sr.Close();
watch.EnableRaisingEvents = false;
newsStream.Close();
newsReader.Close();
}

//opens file dialogs so user can chose files.
private void openNewsDialog(object sender, EventArgs e)
{
newsDialog.ShowDialog();
}

private void openLogDialog(object sender, EventArgs e)
{
logDialog.ShowDialog();
}

//sets the files the user chose to strings so the Streams can open
them.
private void logSetter(object sender, CancelEventArgs e)
{
logName = logDialog.FileName;
fi = new FileInfo(logName);
logDir = fi.DirectoryName;
}

}

}

Thanks for all your help!

 

[Mattias Sjögren]

The FileSystemWatcher events run on a thread from the thread pool
unless you set its SynchronizingObject property to a window on your UI
thread. Only the main thread is affected by the STAThread attribute.


Mattias