I find a ununderstandable behavior in UWP. I make a content with a long width in ScrollViewer and the content will out of the panel.
I write a xaml with a ScrollViewer and a Grid. And than I set a content to ScrollViewer and the content is a long width Grid.
<Grid> <Grid.ColumnDefinitions> <ColumnDefinition /> <ColumnDefinition /> </Grid.ColumnDefinitions> <ScrollViewer HorizontalScrollBarVisibility="Visible"> <Grid Width="2100000"> <TextBlock Margin="10,10,10,10" Text="asdasdasdasdasdasdasdasdasdaasdasdasdasdasdasdasdasdasdasdasdasdasdasdaasdasdasdasdasdasdasdasdasdasdasdasdasdasdaasdasdasdasdasdasdasdasdasdasdasdasdasd" /> </Grid> </ScrollViewer> <Grid Grid.Column="1" Background="#aa565656" /> </Grid>
Running the code, and the TextBlock will out of the Grid.
After I set the Grid width to 2000000 that work well.
Do not ask why I can find it. I wrote a code
await "lindexi is doubi"; and my friend pressed my head to the Keyboard. My head pressed the
0 key and set the Grid width. I ran the code and I was surprised to see it.
本文会经常更新，请阅读原文： https://blog.lindexi.com/post/uwp-ScrollViewer-content-out-of-panel-when-set-the-long-width.html ，以避免陈旧错误知识的误导，同时有更好的阅读体验。