Question

我试图找到这个问题的答案, 在每个我发现的文章里, 都有找到孩子的答案, 但没有一个儿童工作隐藏或崩溃的儿童

也有人问这是否可能, 但没有人回答, 所以我开始觉得这是不可能的。

如果任何人有办法这样做,我将永远感激不尽。

我的功能看起来是这样的:

        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;
    }

-EDITED So, I realise my problem is that I was trying to find the item before it was created,

我对Xaml中的一个财产有约束力,该财产会爆炸并找到一个用给定名字的物品, 但该物品不是在那个时候创建的, 如果我在Xaml中重新排列了物品的顺序, 它会起作用, 并且找到... doh!

Answer 1

这里是我的代码, 如果您指定 X: Name 和类型, 它会有效

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;
  }

友情链接