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Extender with GridSplitter

I have a grid divider in front of the expander (which exists on the right side of the wpf window), and when I run the application, I need to use the grid divider to see more data from the expander after it has expanded, but the problem is that when I was split drag and drop, I get a full overview of my expander, regardless of the original width, but after clicking on the expander to collapse, it will not go to its original position, maintaining the width of the drag and drop splitter. So anyone can help me how I can send the expander back to its original position.

Thanks, @nagaraju.

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2 answers

Once you use the separator, the width of the grid columns will no longer be “auto”.
One solution is to respond to a collapsed expander event and reset the width of the first column for automatic use with column.Width=GridLength.Auto;

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As the contents of the Expander change, it may make sense to place the GridSplitter inside the Expander , and on the outside you just have a regular grid that makes a cell in which the size of the expander is equal to the content.

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Source: https://habr.com/ru/post/908688/

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