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Asked: 2026-05-10T21:42:57+00:00

While trying to answer a question in the vicinity ‘ Unit Testing WPF Bindings

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While trying to answer a question in the vicinity ‘Unit Testing WPF Bindings‘ I had the following niggling question..
What’s the best way to find if you have WPF Data Binding wiring setup incorrectly (or you just broke something that was wired up correctly) ?

Although the unit-testing approach seems to be like Joel’s ‘ripping off your arm to remove a splinter’.. I am looking around for easier less Overhead ways to detect this.

Everyone seems to have committed themselves to data binding in a big way with WPF.. and it does have its merits.

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  1. Best I could find… How can I debug WPF Bindings? by Beatriz Stollnitz

    Since everyone can’t always keep one eye on the Output Window looking for Binding errors, I loved Option#2. Which is add this to your App.Config

    <?xml version="1.0" encoding="utf-8" ?> <configuration>   <system.diagnostics>     <sources>       <source name="System.Windows.Data" switchName="SourceSwitch" >         <listeners>           <add name="textListener" />         </listeners>       </source>     </sources>      <switches>       <add name="SourceSwitch" value="All" />     </switches>      <sharedListeners>       <add name="textListener"            type="System.Diagnostics.TextWriterTraceListener"            initializeData="GraveOfBindErrors.txt" />     </sharedListeners>      <trace autoflush="true" indentsize="4"></trace>    </system.diagnostics> </configuration>

    Pair that up with a good regex scan script to extract out relevant info, that you can run occasionally on the GraveOfBindErrors.txt in your output folder

    System.Windows.Data Error: 35 : BindingExpression path error: 'MyProperty' property not found on 'object' ''MyWindow' (Name='')'. BindingExpression:Path=MyProperty; DataItem='MyWindow' (Name=''); target element is 'TextBox' (Name='txtValue2'); target property is 'Text' (type 'String')
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