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.

            <ColumnDefinition />
            <ColumnDefinition />
        <ScrollViewer HorizontalScrollBarVisibility="Visible">
            <Grid Width="2100000">
                <TextBlock Margin="10,10,10,10"
                    Text="asdasdasdasdasdasdasdasdasdaasdasdasdasdasdasdasdasdasdasdasdasdasdasdaasdasdasdasdasdasdasdasdasdasdasdasdasdasdaasdasdasdasdasdasdasdasdasdasdasdasdasd" />
        <Grid Grid.Column="1" Background="#aa565656" />

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.

Code https://github.com/lindexi/lindexi_gd/tree/550373c7ee587980a7ecd56e2c03aa40c6972416/TucasurchasGeldiskaycasoohou

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。

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