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--- swdev:dotnet:wpf:data_binding [2017/06/27 17:17]
smayr [Debugging]
+++ swdev:dotnet:wpf:data_binding [2017/06/27 17:22] (current)
smayr [Add Tracing to Output Window]
@@ Line 1435: / Line 1435: @@
 = Debugging =
+== Add Tracing to Output Window ==
+. Add ''diag:PresentationTraceSources.TraceLevel=High'' to your binding.  For example:
+<code xml>
+<Window x:Class="WpfApplication1.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
+        Title="MainWindow" Height="350" Width="525">
+    <Grid>
+        <TextBlock Text="{Binding ThereIsNoDataContext,
+            diag:PresentationTraceSources.TraceLevel=High}"/>
+    </Grid>
+</Window>
+</code>
+. Add a value converter to the binding, to be able to put a break point in debugger.
+See more:
+  * [[https://spin.atomicobject.com/2013/12/11/wpf-data-binding-debug/|How To Debug Data Binding Issues in WPF]]
+== Enable Debug Output ==
   * Enable WPF debug output. In Visual Studio, Options > Debugging > Output Window > WPF Trace Settings > Data Binding > All.
   * Add a high TraceLevel to your binding: <code csharp>PresentationTraceSources.SetTraceLevel(NewBinding, PresentationTraceLevel.High);</code>