应该是DataGrid中的水平滚动条不会消失 [英] Horizontal scrollbar in DataGrid does not disappear when it should

问题描述

你好，



我有一个DataGrid，它根据附近下拉列表中的类别选择显示数据。在这个DataGrid中，我只有1列。



绑定：ItemsSource =" {Binding SearchResults}"其中SearchResults是ObservableCollection。



Scrollbar：Visibility =" {TemplateBinding ComputedHorizo​​ntalScrollBarVisibility}"来自ScrollViewer



对于第一类水平滚动条，当文本行太长（红色）且水平滚动条显示正确时，工作正常。

Hello,

I have a DataGrid that displays data based on selection of categories from nearby drop-down. In this DataGrid I have only 1 column.

Binding: ItemsSource="{Binding SearchResults}" where SearchResults is ObservableCollection.

Scrollbar: Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" from ScrollViewer

For 1st category horizontal scrollbar works fine when there is a row with text too long (red colour) and horizontal scrollbar appears correctly.

当我用drop更改为第2类时-down没有结果（所以SearchResults为空），滚动条消失。

Also when I change to 2nd category with drop-down with no results (so SearchResults are empty), scrollbar disappears.

但是当我更改为第3个类别且结果超过0时，滚动条会重新出现，其长度与第一个类别相同，长文本，即使没有长文本行！

But when I change to 3rd category with more than 0 results, scrollbar reappears with the same size as was in the 1st category with long text, even though there is no row with long text!

如果我永远不会去第一类（这么长的文字从未显示过）然后它也适用于第三类，滚动条不会出现...
$


我不喜欢垂直滚动条有问题all（两者的设置相同）。
$


这是某种默认行为吗？我在网上找不到任何东西，我试过没有帮助。



感谢您的帮助！
$

$ b $bMiloš ，斯洛伐克

If I never go to 1st category (so long text has never been displayed) then it works fine also for 3rd category and scrollbar doesn't appear...

I don't have a problem with vertical scrollbar at all (settings for both of them are the same).

Is this some kind of default behaviour? I couldn't find anything online and nothing I tried helped.

Thanks for help!

Miloš, Slovakia

推荐答案

嗨Miloš，

Hi Miloš,

请看下面的d uplicate
主题，此处有详细信息e < span class ="x_x_short_text"id ="x_x_result_box"lang ="en"tabindex =" - 1"> xplanation。

Look at following duplicate thread, here have a detail explanation.

所以

So.

当ObservableCollection发生变化时添加以下代码。

Add following code when the ObservableCollection changed.

        public ObservableCollection<category> SearchResults
        {
            get { return _searchResults; }
            set {
                _searchResults = value;

                RaisePropertyChanged("SearchResults");

                foreach (DataGridColumn c in dg.Columns)
                    c.Width = 0;

                // Update your DG's source here

                foreach (DataGridColumn c in dg.Columns)
                    c.Width = DataGridLength.Auto;
            }
        }

或者在ComboBox_SelectionChanged事件中。

Or in ComboBox_SelectionChanged event.

Best问候，

Bob

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