Differences

This shows you the differences between two versions of the page.

--- swdev:dotnet:wpf:data_binding [2013/02/18 16:59]
smayr [ObjectDataProvider]
+++ swdev:dotnet:wpf:data_binding [2017/06/27 17:22] (current)
smayr [Add Tracing to Output Window]
@@ Line 391: / Line 391: @@
    </ListBox>
 </Grid>
+</code>
+== Clearing Binding ==
+To clear data binding programmatically (for a ''TextBox'' called ''txtName''):
+<code csharp>
+BindingOperations.ClearBinding(txtName, TextBox.TextProperty);
 </code>
@@ Line 1428: / 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>
@@ Line 1439: / Line 1469: @@
   * [[http://stackoverflow.com/questions/4026543/is-there-a-good-tool-for-debugging-xamls-databinding-behavior-errors-at-runtim|Tools for Debugging Data Binding at runtime]]
   * [[http://bea.stollnitz.com/blog/?p=52|Bea Stollnitz: How can I debug WPF bindings?]]
+  * [[https://spin.atomicobject.com/2013/12/11/wpf-data-binding-debug/|How To Debug Data Binding Issues in WPF]]
 = See Also =
   * [[http://msdn2.microsoft.com/en-us/library/ms752347(VS.85).aspx|MSDN Data Binding Overview]]