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POSystem.ObjectDisposedException Error on C# v4.0
 

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  1. POSystem.ObjectDisposedException Error on C# v4.0
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    <p>I implemented this code: <a href="https://stackoverflow.com/questions/12543223/c-sharp-processing-fixed-width-files">C# Processing Fixed Width Files</a></p> <p>But since my work PC runs Windows XP I had to save the program using C# v4.0. Unfortunately the following code:</p> <pre><code>static string filePath = ""; public Main() { InitializeComponent(); } private void buttonLoadFile_Click(object sender, EventArgs e) { DialogResult openFile = openFileDialog.ShowDialog(); if (openFile == DialogResult.OK) { filePath = openFileDialog.FileName; } } private void buttonProcessFile_Click(object sender, EventArgs e) { if (filePath == "") { MessageBox.Show("Load Fixed Width File First", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { if (textboxFilePath.Text == "") { MessageBox.Show("Enter CSV File Path", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { DialogResult result = DialogResult.No; if (File.Exists(filePath)) { result = MessageBox.Show("Overwrite CSV File?", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning); } if (result == DialogResult.Yes) { var lines = File.ReadLines(filePath); var widthList = lines.First().GroupBy(c =&gt; c) .Select(g =&gt; g.Count()) .ToList(); var list = new List&lt;KeyValuePair&lt;int, int&gt;&gt;(); int startIndex = 0; for (int i = 0; i &lt; widthList.Count(); i++) { var pair = new KeyValuePair&lt;int, int&gt;(startIndex, widthList[i]); list.Add(pair); startIndex += widthList[i]; } var csvLines = lines.Select(line =&gt; string.Join(",", list.Select(pair =&gt; line.Substring(pair.Key, pair.Value)))); File.WriteAllLines(textboxFilePath.Text, csvLines); MessageBox.Show("File Saved", "Completed", MessageBoxButtons.OK, MessageBoxIcon.Information); } } } } </code></pre> <p>Gives me this error when run on Windows XP and compiled in C# v4.0:</p> <pre><code>************** Exception Text ************** System.ObjectDisposedException: Cannot read from a closed TextReader. at System.IO.__Error.ReaderClosed() at System.IO.StreamReader.ReadLine() at System.IO.File.&lt;InternalReadLines&gt;d__0.MoveNext() at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() at System.IO.File.InternalWriteAllLines(TextWriter writer, IEnumerable`1 contents) at System.IO.File.WriteAllLines(String path, IEnumerable`1 contents) at FixedWidthFiles.Main.buttonProcessFile_Click(Object sender, EventArgs e) at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message&amp; m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message&amp; m) at System.Windows.Forms.ButtonBase.WndProc(Message&amp; m) at System.Windows.Forms.Button.WndProc(Message&amp; m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message&amp; m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp; m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.1 (RTMRel.030319-0100) CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll ---------------------------------------- FixedWidthFiles Assembly Version: 1.0.0.0 Win32 Version: 1.0.0.0 CodeBase: file:///C:/TEMP/FixedWidthFiles.exe ---------------------------------------- System.Windows.Forms Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.1 built by: RTMRel CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System.Drawing Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.1 built by: RTMRel CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- System Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.1 built by: RTMRel CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Core Assembly Version: 4.0.0.0 Win32 Version: 4.0.30319.1 built by: RTMRel CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll ---------------------------------------- </code></pre> <p>Any suggestions?</p>
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    1. UShshah
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      1. VTUpMod
    1. COThe code you showed doesn't seem to match the exception. The exception mentions `Where`. There is no `Where` in your code.
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      1. POSystem.ObjectDisposedException Error on C# v4.0
      1. USDaniel Hilgarth
    2. COCould you try another sample file to see?
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      1. POSystem.ObjectDisposedException Error on C# v4.0
      1. USCuong Le
    3. CO@DanielHilgarth - Updated the post with the exact code I implemented. Apologies for that.
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      1. UShshah
 

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