[英]The process cannot access the file because it is being used by another process - Filewatcher - C# - Console Application
[英]IOException: The process cannot access the file 'file path' because it is being used by another process in Console Application in C#
我正在運行Console_Application-A,在其中我調用另一個Console_Application-B(在其中我為錯誤/異常創建日志文件)。
但是,當我分別運行Console_Application-B時,它正常工作,但是當我當時運行Console_Application-A時,當應用程序需要在日志文件中寫入錯誤時,我會收到異常消息。(Error.txt)。
IOException:該進程無法訪問文件'Error.txt',因為它正在被另一個進程使用
請在這個問題上指導我。
寫入錯誤日志的代碼
public static bool IsFileLocked(FileInfo file)
{
FileStream stream = null;
try
{
stream = file.Open(FileMode.Open, FileAccess.Read, FileShare.None);
}
catch (IOException)
{
return true;
}
finally
{
if (stream != null)
stream.Close();
}
return false;
}
catch (Exception e)
{
string filePath =Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location) + "\\Error.txt";
FileInfo FInfo = new FileInfo(filePath);
var FileState = IsFileLocked(FInfo);
while (FileState){
FileState = IsFileLocked(FInfo);
}
if (!FileState){
using (StreamWriter writer = new StreamWriter(filePath, true))
{
writer.WriteLine("Message :" + e.Message + "<br/>" + Environment.NewLine + "StackTrace :" + e.StackTrace +"" + Environment.NewLine + "Date :" + DateTime.Now.ToString());
writer.WriteLine(Environment.NewLine + "-----------------------------------------------------------------------------" + Environment.NewLine);
writer.Dispose();
}
}
}
不需要先檢查文件是否已鎖定然后再訪問它,因為在檢查和訪問之間,某些其他進程可能仍會鎖定文件。
using System;
using System.IO;
class DirAppend
{
public static void Main()
{
using (StreamWriter w = File.AppendText("log.txt"))
{
Log("Test1", w);
Log("Test2", w);
}
using (StreamReader r = File.OpenText("log.txt"))
{
DumpLog(r);
}
}
public static void Log(string logMessage, TextWriter w)
{
w.Write("\r\nLog Entry : ");
w.WriteLine("{0} {1}", DateTime.Now.ToLongTimeString(),
DateTime.Now.ToLongDateString());
w.WriteLine(" :");
w.WriteLine(" :{0}", logMessage);
w.WriteLine ("-------------------------------");
}
public static void DumpLog(StreamReader r)
{
string line;
while ((line = r.ReadLine()) != null)
{
Console.WriteLine(line);
}
}
}
來源-https: //msdn.microsoft.com/zh-cn/library/3zc0w663(v=vs.110).aspx
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