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POStreamWriter disposed when accessing method
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  1. POStreamWriter disposed when accessing method
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    copied!<p>I'm facing a problem where my declared StreamWriter gets disposed when I try to use a method to write on my log file. Everything is working as expected, except when I run <em>AttachPink</em> or <em>AttachBlue</em>, from another class. Then the StreamWriter is disposed and I get a nullPointerException</p> <pre><code>class Logs : IDisposable { //other declarations private StreamWriter HistoryWriter; private int ReportInterval = 0; public void NewHistory() { HistoryWriter = new StreamWriter(HistoryLocation + HistoryName + HistoryExtension); PrepareHistory(); } private void PrepareHistory() { HistoryWriter.WriteLine("&lt;html&gt;&lt;body bgcolor='#000000'&gt;"); /* * Insert initial HTML tags */ } public void SendHistory() { HistoryWriter.WriteLine("&lt;/body&gt;&lt;/html&gt;"); /* * Final HTML tags */ HistoryWriter.Close(); if (ReportInterval &gt; 0) { /* * Upload File */ } else { Debug.WriteLine("ERROR: Report Interval for History has not been set"); } NewHistory(); } public void AttachPink(String message, StreamWriter writer) { writer.Write( "&lt;font color='DA1BE0'&gt;" + message + "&lt;/font&gt;"); } public void AttachBlue(String message, StreamWriter writer) { writer.Write( "&lt;font color='0C93ED'&gt;" + message + "&lt;/font&gt;"); } public StreamWriter getHistoryWriter() { return HistoryWriter; } public void SetHistoryInterval(int interval) { ReportInterval = interval; } public void Dispose() { if (HistoryWriter != null) { HistoryWriter.Close(); HistoryWriter.Dispose(); HistoryWriter = null; } } } </code></pre> <p>To use the methods I simply declare an instance of Logs class inside another class, like so:</p> <pre><code>class UsingLogs { Logs logs = new Logs(); logs.NewHistory(); logs.AttachBlue("my message", logs.getHistoryWriter()); } </code></pre> <p>I don't know how should I go for preserving classes variables state when accessing multiple methods.</p>
 

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