如果用户在控制加载之前更改 gridsplitter 的位置，则如何在 wpf c# 中将列/行附加到 GridSplitter

Question

 <Grid Grid.Row="1" Visibility="Collapsed" Name="Main_Grid" > <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" MinWidth="100" MaxWidth="1000"/> <ColumnDefinition Width="2" /> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <Grid Grid.Column="0"> <UserControl/> </Grid> <GridSplitter Grid.Column="1" VerticalAlignment="Stretch" HorizontalAlignment="Left" Margin="0" ResizeDirection="Columns" ShowsPreview="False"> <Grid Grid.Column="2"> </Grid>

Here is my Grid Structure .

After loading application I set Visibility of UserControl Visible/Collapsed depends on DataContext.

First time FirstColumn take width as per need(as Width property of ColumnDefination is define as "Auto").

But if user move GridSplitter and after that if I assign new Datacontext to User control or click something in UserControl which has different with GridSplitter remain at old position where user left.

How to refresh it so that it First GridColumn Take Width as per need and GridSplitter should appear attach to it.

Answer 1

So I understand that once the user had changed the position of GridSplitter manually, it will no longer automatically adjust its position even after the size of adjacent Grid changed. In such case, you can revive Auto settings of ColumnDefinition by setting it again from code behind.

this.Main_Grid.ColumnDefinitions[0].Width = GridLength.Auto;