抢占DataGridTemplateColumn中元素的引用 [英] Grabbing reference to element inside DataGridTemplateColumn
问题描述
我已经在这个问题上苦苦挣扎了一段时间，而且似乎无法获得任何答案。我已经模拟了一个简单的XAML文件来演示该问题（我没有提供真正的XAML文件，因为它包含的内容超出了此问题的需要）。
I've been struggling with this problem for a while now and can't seem to get any answers on it. I've mocked up a simple XAML file to demonstrate the problem (I'm not providing my real XAML file since it has more in it than needed for this question).
这是我的问题：给定以下XAML文件，如何在我的代码背后获取对位于DataGridTemplateColumn.CellEditingTemplate DataTemplate中的selectHeight ComboBox的引用？我需要引用，以便可以根据selectAge ComboBox中的选择更改ComboBox的属性。
Here is my question: given the following XAML file how can I get a reference in my codebehind to the selectHeight ComboBox that resides in the DataGridTemplateColumn.CellEditingTemplate DataTemplate? I need the reference so that I can change a property of the ComboBox based on a selection in the selectAge ComboBox.
<Window x:Class="MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<DataGrid Name="grdPeople"
AutoGenerateColumns="False"
AlternatingRowBackground="LightBlue"
CanUserAddRows="True" CanUserDeleteRows="True" IsEnabled="True"
MaxHeight="400" VerticalScrollBarVisibility="Auto">
<DataGrid.Columns>
<!--Name Column-->
<DataGridTemplateColumn Header="MyName" CanUserReorder="False" CanUserResize="False" CanUserSort="False" >
<DataGridTemplateColumn.CellTemplate >
<DataTemplate>
<Label Content="{Binding Path=Name}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate >
<DataTemplate>
<TextBox Text="{Binding Path=Name}"/>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
<!--Age Column-->
<DataGridTemplateColumn Header="MyAge">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Label Content="{Binding Path=Age}"></Label>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox Name="selectAge" ItemsSource="{Binding Path=AgeOpts}">
<ComboBox.ItemTemplate>
<DataTemplate>
<Label Content="{Binding Path=Age}"></Label>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
<!--Height Column-->
<DataGridTemplateColumn Header="MyHeight">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Label Content="{Binding Path=Height}"></Label>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<ComboBox Name="selectHeight" ItemsSource="{Binding Path=HeightOpts}">
<ComboBox.ItemTemplate>
<DataTemplate>
<Label Content="{Binding Path=Height}"></Label>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
我意识到我在做什么我尝试做的可能并非完全是最佳实践，但我正在尝试使用遗留代码中给出的内容。
I realize that what I'm trying to do may not be exactly "best practice" but I'm trying to work with what I've been given in legacy code.
我发现此MSDN页面与我想做的事情有关，但我不知道如何将示例转换为我的方案： http://msdn.microsoft.com/zh-cn/library/system.windows。 frameworktemplate.findname.aspx 。
I found this MSDN page relating to what I want to do but I can't figure out how to translate the example into my scenario: http://msdn.microsoft.com/en-us/library/system.windows.frameworktemplate.findname.aspx.
任何帮助将不胜感激！谢谢！
Any help would be appreciated! Thanks!
推荐答案
这是我喜欢用来浏览WPF可视树并查找控件的库脚本。
Here's a library script I like using to navigate WPF's visual tree and find controls.
您可以这样使用： ComboBox cbx = FindChild< ComboBox>（grdPeople， selectHeight）;
如果找不到任何 ComboBox null c>名为 selectHeight ，因此在使用它之前，请务必检查 cbx == null 。 p>
It will return null if it can't find any ComboBox that is named "selectHeight" so be sure to check if cbx == null before using it.
public static T FindChild<T>(DependencyObject parent, string childName)
where T : DependencyObject
{
// Confirm parent and childName are valid.
if (parent == null) return null;
T foundChild = null;
int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < childrenCount; i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
// If the child is not of the request child type child
T childType = child as T;
if (childType == null)
{
// recursively drill down the tree
foundChild = FindChild<T>(child, childName);
// If the child is found, break so we do not overwrite the found child.
if (foundChild != null) break;
}
else if (!string.IsNullOrEmpty(childName))
{
var frameworkElement = child as FrameworkElement;
// If the child's name is set for search
if (frameworkElement != null && frameworkElement.Name == childName)
{
// if the child's name is of the request name
foundChild = (T)child;
break;
}
else
{
// recursively drill down the tree
foundChild = FindChild<T>(child, childName);
// If the child is found, break so we do not overwrite the found child.
if (foundChild != null) break;
}
}
else
{
// child element found.
foundChild = (T)child;
break;
}
}
return foundChild;
}
public static T FindChild<T>(DependencyObject parent)
where T : DependencyObject
{
// Confirm parent is valid.
if (parent == null) return null;
T foundChild = null;
int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < childrenCount; i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
// If the child is not of the request child type child
T childType = child as T;
if (childType == null)
{
// recursively drill down the tree
foundChild = FindChild<T>(child);
// If the child is found, break so we do not overwrite the found child.
if (foundChild != null) break;
}
else
{
// child element found.
foundChild = (T)child;
break;
}
}
return foundChild;
}
这篇关于抢占DataGridTemplateColumn中元素的引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
