绑定到 wpf 中父元素的属性
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原文地址: http://stackoverflow.com/questions/2439593/
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Bind to a property of a parent element in wpf
提问by msfanboy
'I want to bind the Height property of the RichTextBox to the Height Property of the GridView`s Row. How can I do that? I do not know how to get the Row's Height as I can not access the Row in xaml what I would like to do.
'我想将 RichTextBox 的 Height 属性绑定到 GridView 的 Row 的 Height 属性。我怎样才能做到这一点？我不知道如何获得行的高度，因为我无法在 xaml 中访问我想做的行。
The Ancestor type should be GridViewHeaderRow , but I do not know its level...
Ancestor 类型应该是 GridViewHeaderRow ，但我不知道它的级别......
EDIT:
编辑：
<my:RadGridView Height="524" RowHeight="300" ItemsSource="{Binding Lessons}" AutoGenerateColumns="False" Name="dataGrid1" VerticalAlignment="Top" SelectionMode="Single" CanUserSortColumns="False" IsFilteringAllowed="False">
<my:RadGridView.Columns>
<my:GridViewDataColumn DataMemberBinding="{Binding SchoolclassName}" Header="Schoolclass" Width="0.1*" />
<my:GridViewDataColumn DataMemberBinding="{Binding SubjectName}" Header="Subject" Width="0.1*" />
<my:GridViewDataColumn Width="0.3*" Header="Homework">
<my:GridViewDataColumn.CellTemplate>
<DataTemplate>
<RichTextBox Height="{Binding ElementName=dataGrid1,Path=RowHeight}" >
<FlowDocument>
<Paragraph>
<Run Text="{Binding Homework}"/>
</Paragraph>
</FlowDocument>
</RichTextBox>
</DataTemplate>
</my:GridViewDataColumn.CellTemplate>
<my:RadGridView Height="524" ItemsSource="{Binding Lessons}" AutoGenerateColumns="False" Name="dataGrid1" VerticalAlignment="Top" SelectionMode="Single" CanUserSortColumns="False" IsFilteringAllowed="False">
<my:RadGridView.Columns>
<my:GridViewDataColumn Name="ContentColumn" Width="0.3*" Header="Content">
<my:GridViewDataColumn.CellTemplate>
<DataTemplate>
<RichTextBox Height="{Binding ElementName=MyRowNameToBindTo,Path=Height}">
<FlowDocument>
<Paragraph>
<Run Text="{Binding Content}"/>
</Paragraph>
</FlowDocument>
</RichTextBox>
</DataTemplate>
</my:GridViewDataColumn.CellTemplate>
...
...
回答by Travis Heseman
I don't know about your RadGridView here. But the first thing I'd try is using a RelativeSourceBinding with FindAncestor to walk up the visual tree until a GridViewHeaderRow is found and bind to its Height property.
我不知道你的 RadGridView 在这里。但是我要尝试的第一件事是使用带有 FindAncestor的RelativeSourceBinding 沿着可视化树向上走，直到找到 GridViewHeaderRow 并绑定到它的 Height 属性。
... Height="{Binding Height,
RelativeSource={RelativeSource Mode=FindAncestor,
AncestorType={x:Type GridViewHeaderRow }}}" ...
You may have to walk up the tree to find the RadGridView and then walk back down it to the header row.
您可能需要沿着树向上走才能找到 RadGridView，然后再向下走回标题行。
... Height="{Binding HeaderRow.Height,
RelativeSource={RelativeSource Mode=FindAncestor,
AncestorType={x:Type RadGridView }}}" ...
or
或者
... Height="{Binding Rows[0].Height,
RelativeSource={RelativeSource Mode=FindAncestor,
AncestorType={x:Type RadGridView }}}" ...
Depends on the implementation of RadGridView.
取决于 RadGridView 的实现。
