以编程方式向datagrid添加带有自定义标题的数据网格列
本文关键字:标题 数据 数据网 网格 自定义 方式 编程 datagrid 添加 | 更新日期: 2023-09-27 18:14:23
在我的Windows。我定义了以下列:
<DataGridTextColumn x:Key="CustomColumn" x:Shared="False">
<DataGridTextColumn.Header>
<StackPanel>
<Label Padding="0" Name="labelA"/>
<Separator HorizontalAlignment="Stretch"/>
<Label Padding="0" Name="labelB"/>
</StackPanel>
</DataGridTextColumn.Header>
</DataGridTextColumn>
我有一个事件从我的ViewModel中触发,并将以下"CustomColumn"添加到我的DataGrid:
var column = FindResource("CustomColumn") as DataGridTextColumn;
var label = FindName("labelA") as Label;
label.Content = string.Format("A {0}", i);
DataGrid1.Columns.Add(column);
问题是,我如何改变CustomColumn标题内的两个标签的内容?上面的代码失败了,因为它无法找到"labelA"。(添加列工作,但我还需要设置这些标签)。我的猜测是,我需要通过VisualTree找到它——但我想确保我没有做错任何其他事情。
谢谢你的帮助
我创建了一些可视树帮助器,我一直使用它们来查找可视树中的对象
例如,你可以这样找到一个名为"LabelA"的标签:
VisualTreeHelpers.FindChild<Label>(column, "LabelA");
如果上面的链接不起作用,这里是FindChild
方法
using System.Windows;
using System.Windows.Media;
namespace MyNamespace
{
public class VisualTreeHelpers
{
/// <summary>
/// Looks for a child control within a parent by name
/// </summary>
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;
}
}
}