动画时网格列更改宽度 [英] Grid Column changing Width when animating

问题描述

我有一个 Grid 元素，它有两列和三行.最后一行的高度为 0...我使用自定义动画类为 height 属性设置动画，因为 gridheight 属性不是整数..

I have a Grid element that has two columns and three rows. The last row has a height of 0... and I animate the height property using a custom animation class because the gridheight property isnt an integer..

动画效果很好，但是当我激活它时，它似乎随机地改变了第二列的宽度.有时只是大几个像素，有时是宽度的两倍……

The animation works just fine, but when I activate it, it changes the width of the second column seemingly randomly.. sometimes just a few pixels bigger and sometimes over double as wide...

这里是网格代码

<Grid >
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition />
                            <ColumnDefinition Width="50"/>
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="1*" />
                            <RowDefinition Height="7"/>
                            <RowDefinition Name="LyricsRow" Height="1">

                                <RowDefinition.Style>
                                    <Style>
                                        <Style.Triggers>
                                            <DataTrigger Binding="{Binding Path=IsTrayOpen}" Value="True">
                                                <DataTrigger.EnterActions>
                                                    <BeginStoryboard>
                                                        <Storyboard>
                                                            <local:GridLengthAnimation
                                                              Storyboard.TargetProperty="Height"
                                                              From="0" To="150" Duration="0:0:0.3" >
                                                            </local:GridLengthAnimation>
                                                        </Storyboard>
                                                    </BeginStoryboard>
                                                </DataTrigger.EnterActions>
                                                <DataTrigger.ExitActions>
                                                    <BeginStoryboard>
                                                        <Storyboard>
                                                            <local:GridLengthAnimation
                                                              Storyboard.TargetProperty="Height"
                                                              From="150" To="0" Duration="0:0:0.5" />
                                                        </Storyboard>
                                                    </BeginStoryboard>
                                                </DataTrigger.ExitActions>
                                            </DataTrigger>
                                        </Style.Triggers>
                                    </Style>
                                </RowDefinition.Style>

                            </RowDefinition>
                        </Grid.RowDefinitions>

这有什么原因吗?

推荐答案

可能取决于单元格"的内容

It probably depends on the content of the "cells"

除了 Width="50" 之外，尝试在 columnDefinition 上设置 MaxWidth="50"

try setting MaxWidth="50" on your columnDefinition in addition to Width="50"

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