xamarin/Xamarin.Forms
Using multiple ToolbarItem or MenuItem instances disables compiled bindings
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#5,762 opened on 2019/03/30
a/binding ⛓a/listviewe/4 :clock4:help wantedinactivet/bug :bug:up-for-grabs
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説明
Description
Using multiple ToolbarItem or MenuItem instances disables compiled bindings.
The following code compiles, as it should:
<ListView.ItemTemplate>
<DataTemplate x:DataType="local:MainPageDataValue">
<TextCell Text="{Binding Value}">
<TextCell.ContextActions>
<MenuItem Text="{Binding ValueMenuItem}" />
</TextCell.ContextActions>
</TextCell>
</DataTemplate>
</ListView.ItemTemplate>
The following code triggers a compiler error, as it should:
<ListView.ItemTemplate>
<DataTemplate x:DataType="local:MainPageDataValue">
<TextCell Text="{Binding Value}">
<TextCell.ContextActions>
<MenuItem Text="{Binding ValueMenuItemBUGBUG}" />
</TextCell.ContextActions>
</TextCell>
</DataTemplate>
</ListView.ItemTemplate>
However, the following code also compiles, because the XAML compiler isn't used when there are multiple MenuItem instances:
<ListView.ItemTemplate>
<DataTemplate x:DataType="local:MainPageDataValue">
<TextCell Text="{Binding Value}">
<TextCell.ContextActions>
<MenuItem Text="{Binding ValueMenuItemBUGBUG}" />
<MenuItem Text="TEXT" /> <!-- Remove this and see a compile error -->
</TextCell.ContextActions>
</TextCell>
</DataTemplate>
</ListView.ItemTemplate>
Steps to Reproduce
In a page with compiled bindings, add multiple ToolbarItem or MenuItem instances.
Expected Behavior
Compiled bindings are enabled. Bindings to non-existent properties will fail at compile time.
Actual Behavior
Compiled bindings are disabled.
Basic Information
- Version with issue:
- Last known good version:
- IDE: VS 2017
- Platform Target Frameworks:
- Android: 8.1