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How to suppress the System.Windows.Data Error warning message

, 13 Nov 2010 CPOL
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Suppress the System.Windows.Data Error warning message in Library
When we use FindAncesstor in custom control template for binding internal elements property into its ancestor element, Visual Studio displays data warning messages in output window when binding engine meets unmatched target type during visual tree traversal though it does the proper binding when it receives expected target type during visual tree traversal. To suppress these data error warning messages, you should mention level of warning message trace in your library class.
 
Here is the simple data error that I am getting when I bind some commands in rich text box.
 
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.RichTextBox', AncestorLevel='1''. BindingExpression:Path=Content; DataItem=null; target element is 'Button' (Name=''); target property is 'CommandTarget' (type 'IInputElement')
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.RichTextBox', AncestorLevel='1''. BindingExpression:Path=Content; DataItem=null; target element is 'Button' (Name=''); target property is 'CommandTarget' (type 'IInputElement')
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.RichTextBox', AncestorLevel='1''. BindingExpression:Path=Content; DataItem=null; target element is 'Button' (Name=''); target property is 'CommandTarget' (type 'IInputElement')
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.RichTextBox', AncestorLevel='1''. BindingExpression:Path=Content; DataItem=null; target element is 'Button' (Name=''); target property is 'CommandTarget' (type 'IInputElement')
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.RichTextBox', AncestorLevel='1''. BindingExpression:Path=Content; DataItem=null; target element is 'Button' (Name=''); target property is 'CommandTarget' (type 'IInputElement')
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.RichTextBox', AncestorLevel='1''. BindingExpression:Path=Content; DataItem=null; target element is 'Button' (Name=''); target property is 'CommandTarget' (type 'IInputElement')
 
The solution is, set data binding source switch level as critical in constructor of the class.
 
System.Diagnostics.PresentationTraceSources.DataBindingSource.Switch.Level = System.Diagnostics.SourceLevels.Critical;
 
Enjoy !!!

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

venugopalm
Software Developer (Senior) Logitech Engineering & Design (India) Pvt. Ltd.
India India
Venugopal works as a Senior Software Engineer in Logitech Engineering & Design (India) Pvt. Ltd. He hold a Masters in Computer Applications and has 4+ years experience in C#, XAML, Silverlight & WPF.
 
Venugopal firmly believes "technology is impermanent, change is not"!. While he has strong technical inclination towards MS technologies, he is deeply passionate about pursuing his career in Windows7-WPF and Silverlight Technology.
 
Venu engages in a wide gamut of temperamental hobbies ranging from making friends, traveling, helping his friends studies. To murmuring songs and watching movies in leisure time.

Comments and Discussions

 
QuestionAnswer : How to suppress the System.Windows.Data Error warning message PinmemberAmolb5213-Nov-14 3:23 
GeneralMy vote of 5 PinmemberGlenn Slayden1-Nov-13 22:35 

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