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Using DateTimePicker leads into error #3829

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seba30 opened this issue May 29, 2020 · 2 comments · Fixed by #3830
Closed

Using DateTimePicker leads into error #3829

seba30 opened this issue May 29, 2020 · 2 comments · Fixed by #3830
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@punker76
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Bug
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2.0.1

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@seba30
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seba30 commented May 29, 2020

Hey there,

With using the DateTimePicker, I get an error with the following message:

Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.DatePicker', AncestorLevel='1''. BindingExpression:Path=(0); DataItem=null; target element is 'DatePickerTextBox' (Name='PART_TextBox'); target property is 'HelpText' (type 'String')

Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.DatePicker', AncestorLevel='1''. BindingExpression:Path=(0); DataItem=null; target element is 'DatePickerTextBox' (Name='PART_TextBox'); target property is 'LabeledBy' (type 'UIElement')

Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.DatePicker', AncestorLevel='1''. BindingExpression:Path=(0); DataItem=null; target element is 'DatePickerTextBox' (Name='PART_TextBox'); target property is 'Name' (type 'String')

A repository with the error can be found here.

MahApps.Metro: v2.0.0
Windows: Win10 1909 [Version 10.0.18363.836]
Visual Studio: 2019 16.6.0
Target Framework: v4.8
@seba30 seba30 added the Bug label May 29, 2020
@punker76 punker76 self-assigned this May 29, 2020
@punker76 punker76 added this to the 2.x.x milestone May 29, 2020
punker76 added a commit that referenced this issue May 29, 2020
@punker76
(GH-3829) Fix DateTimePicker BindingExpression:Path errors
42139a6 
We use a DatePickerTextBox inside the TimePickerBase which causes these errors with TargetFramework 4.8 and higher.
The DatePickerTextBox style uses triggers for UseNetFx472CompatibleAccessibilityFeatures, but the Bindings are looking for a DatePicker.
To fix this we added a new style for our DatePickerTextBox called MahApps.Styles.DatePickerTextBox.TimePickerBase.
@punker76 punker76 mentioned this issue May 29, 2020
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punker76 added a commit that referenced this issue May 29, 2020
@punker76
Merge pull request #3830 from MahApps/fix/GH-3829-DatePicker-UseNetFx…
2e39545 
…472CompatibleAccessibilityFeatures

(GH-3829) Fix DateTimePicker BindingExpression errors
@punker76
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@seba30 this has now been fixed, and it will be released in the next version of MahApps.Metro

@seba30
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seba30 commented May 29, 2020

Thank you so much!

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2.0.1
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(GH-3829) Fix DateTimePicker BindingExpression errors MahApps/MahApps.Metro
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@punker76 @seba30