WPF查找子控件和父控件方法
2017-11-14 22:36
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一、查找某种类型的子控件,并返回一个List集合
public List<T> GetChildObjects<T>(DependencyObject obj, Type typename) where T : FrameworkElement
{
DependencyObject child = null;
List<T> childList = new List<T>();
for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
{
child = VisualTreeHelper.GetChild(obj, i);
if (child is T && (((T)child).GetType() == typename))
{
childList.Add((T)child);
}
childList.AddRange(GetChildObjects<T>(child,typename));
}
return childList;
}
调用:
List<Button> listButtons = GetChildObjects<Button>(parentPanel, typeof(Button)); //parentPanel就是xaml里定义的控件的x:name
二、通过名称查找子控件,并返回一个List集合
public List<T> GetChildObjects<T>(DependencyObject obj, string name) where T : FrameworkElement
{
DependencyObject child = null;
List<T> childList = new List<T>();
for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
{
child = VisualTreeHelper.GetChild(obj, i);
if (child is T && (((T)child).GetType() == name |string.IsNullOrEmpty(name)))
{
childList.Add((T)child);
}
childList.AddRange(GetChildObjects<T>(child,name));
}
return childList;
}
调用:
List<Button> listButtons = GetChildObjects<Button>(parentPanel, "button1");
三、通过名称查找某子控件:
public T GetChildObject<T>(DependencyObject obj, string name) where T : FrameworkElement
{
DependencyObject child = null;
T grandChild = null;
for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
{
child = VisualTreeHelper.GetChild(obj, i);
if (child is T && (((T)child).Name == name | string.IsNullOrEmpty(name)))
{
return (T)child;
}
else
{
grandChild = GetChildObject<T>(child, name);
if (grandChild != null)
return grandChild;
}
}
returnnull;
}
调用:
StackPanel sp = GetChildObject<StackPanel>(this.LayoutRoot, "spDemoPanel");
四、通过名称查找父控件
public T GetParentObject<T>(DependencyObject obj, string name) where T : FrameworkElement
{
DependencyObject parent = VisualTreeHelper.GetParent(obj);
while (parent != null)
{
if (parent is T && (((T)parent).Name == name | string.IsNullOrEmpty(name)))
{
return (T)parent;
}
parent = VisualTreeHelper.GetParent(parent);
}
returnnull;
}
调用:
Grid layoutGrid = VTHelper.GetParentObject<Grid>(this.spDemoPanel, "LayoutRoot");
public List<T> GetChildObjects<T>(DependencyObject obj, Type typename) where T : FrameworkElement
{
DependencyObject child = null;
List<T> childList = new List<T>();
for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
{
child = VisualTreeHelper.GetChild(obj, i);
if (child is T && (((T)child).GetType() == typename))
{
childList.Add((T)child);
}
childList.AddRange(GetChildObjects<T>(child,typename));
}
return childList;
}
调用:
List<Button> listButtons = GetChildObjects<Button>(parentPanel, typeof(Button)); //parentPanel就是xaml里定义的控件的x:name
二、通过名称查找子控件,并返回一个List集合
public List<T> GetChildObjects<T>(DependencyObject obj, string name) where T : FrameworkElement
{
DependencyObject child = null;
List<T> childList = new List<T>();
for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
{
child = VisualTreeHelper.GetChild(obj, i);
if (child is T && (((T)child).GetType() == name |string.IsNullOrEmpty(name)))
{
childList.Add((T)child);
}
childList.AddRange(GetChildObjects<T>(child,name));
}
return childList;
}
调用:
List<Button> listButtons = GetChildObjects<Button>(parentPanel, "button1");
三、通过名称查找某子控件:
public T GetChildObject<T>(DependencyObject obj, string name) where T : FrameworkElement
{
DependencyObject child = null;
T grandChild = null;
for (int i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
{
child = VisualTreeHelper.GetChild(obj, i);
if (child is T && (((T)child).Name == name | string.IsNullOrEmpty(name)))
{
return (T)child;
}
else
{
grandChild = GetChildObject<T>(child, name);
if (grandChild != null)
return grandChild;
}
}
returnnull;
}
调用:
StackPanel sp = GetChildObject<StackPanel>(this.LayoutRoot, "spDemoPanel");
四、通过名称查找父控件
public T GetParentObject<T>(DependencyObject obj, string name) where T : FrameworkElement
{
DependencyObject parent = VisualTreeHelper.GetParent(obj);
while (parent != null)
{
if (parent is T && (((T)parent).Name == name | string.IsNullOrEmpty(name)))
{
return (T)parent;
}
parent = VisualTreeHelper.GetParent(parent);
}
returnnull;
}
调用:
Grid layoutGrid = VTHelper.GetParentObject<Grid>(this.spDemoPanel, "LayoutRoot");
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