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annotate MetroWpf/MetroWpf.Xaml/Binding/BindingErrorTraceListener.cs @ 15:060f02cd4591

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author stevenh7776 stevenhollidge@hotmail.com
date Mon, 12 Mar 2012 23:05:21 +0800
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1 // http://www.switchonthecode.com/tutorials/wpf-snippet-detecting-binding-errors
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2
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3 using System.Diagnostics;
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4 using System.Text;
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5 using System.Windows;
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6
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7 namespace MetroWpf.Xaml.Binding
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8 {
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9 public class BindingErrorTraceListener : DefaultTraceListener
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10 {
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11 private static BindingErrorTraceListener _listener;
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12
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13
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14 private readonly StringBuilder _message = new StringBuilder();
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15
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16 private BindingErrorTraceListener()
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17 {
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18 }
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19
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20 public override void Write(string message)
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21 {
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22 _message.Append(message);
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23 }
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24
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25 public override void WriteLine(string message)
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26 {
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27 _message.Append(message);
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28
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29 var final = _message.ToString();
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30 _message.Length = 0;
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31
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32 MessageBox.Show(final,
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33 "Binding Error",
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34 MessageBoxButton.OK,
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35 MessageBoxImage.Error);
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36 }
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37
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38 public static void CloseTrace()
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39 {
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40 if (_listener == null)
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41 {
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42 return;
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43 }
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44
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45 _listener.Flush();
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46 _listener.Close();
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47 PresentationTraceSources.DataBindingSource.Listeners.Remove(_listener);
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48 _listener = null;
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49 }
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50
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51 [Conditional("DEBUG")]
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52 public static void SetTrace()
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53 {
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54 SetTrace(SourceLevels.Error, TraceOptions.None);
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55 }
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56
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57 public static void SetTrace(SourceLevels level, TraceOptions options)
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58 {
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59 if (_listener == null)
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60 {
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61 _listener = new BindingErrorTraceListener();
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62 PresentationTraceSources.DataBindingSource.Listeners.Add(_listener);
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63 }
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64
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65 _listener.TraceOutputOptions = options;
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66 PresentationTraceSources.DataBindingSource.Switch.Level = level;
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67 }
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68 }
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69 }