我试图找到这个问题的答案,在每一篇文章中我都找到了递归查找 child 的答案,但他们都没有与隐藏或崩溃的 child 一起工作
同样在每个帖子中,有人问这是否可能,但没有人回答,所以我开始认为这是不可能的
如果有人有办法做到这一点,我将永远感激不尽。
我的功能如下所示:
public static DependencyObject FindLogicalDescendentByName(this DependencyObject source, string name)
{
DependencyObject result = null;
IEnumerable children = LogicalTreeHelper.GetChildren(source);
foreach (var child in children)
{
if (child is DependencyObject)
{
if (child is FrameworkElement)
{
if ((child as FrameworkElement).Name.Equals(name))
result = (DependencyObject)child;
else
result = (child as DependencyObject).FindLogicalDescendentByName(name);
}
else
{
result = (child as DependencyObject).FindLogicalDescendentByName(name);
}
if (result != null)
return result;
}
}
return result;
}
-编辑
所以,
我意识到我的问题是我试图在创建项目之前找到它,
我正在绑定(bind)到 xaml 中的一个属性,该属性会关闭并按给定名称查找项目,但该项目当时没有创建,如果我在 xaml 中重新订购该项目,它可以工作并找到该项目。 .. 哦!
最佳答案
这是我的代码,如果您指定 X:Name 和类型,它就可以工作
调用示例:
System.Windows.Controls.Image myImage = FindChild<System.Windows.Controls.Image>(this (or parent), "ImageName");
/// <summary>
/// Find specific child (name and type) from parent
/// </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
{
// child element found.
foundChild = (T)child;
break;
}
}
return foundChild;
}
关于wpf - 查找包含隐藏节点和折叠节点的逻辑子节点,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10722791/