/// <summary>
/// 深层递归遍历，查找特定类型、特定名称的子对象
/// </summary>
public static T GetChildObject <T>(DependencyObject objReference, string strName) where T : FrameworkElement
{
T objRetval = null;
do
{
if (null == objReference)
{
break;
}
if (String.IsNullOrEmpty(strName))
{
objRetval = VisualTreeHelperEx.GetChildObject <T>(objReference);
break;
}
int iChildrenCount = VisualTreeHelper.GetChildrenCount(objReference);
if (0 >= iChildrenCount)
{
break;
}
for (int i = 0; i < iChildrenCount; ++i)
{
DependencyObject objChild = VisualTreeHelper.GetChild(objReference, i);
if (objChild is T && ((T)objChild).Name == strName)
{
objRetval = (T)objChild;
break;
}
T objGrandChild = VisualTreeHelperEx.GetChildObject <T>(objChild, strName);
if (null != objGrandChild)
{
objRetval = objGrandChild;
break;
}
}
}while (false);
return(objRetval);
}
/// <summary>
/// 深层递归遍历，查找特定类型、特定名称的子对象集合
/// </summary>
public static List <T> GetChildObjects <T>(DependencyObject objReference, string strName) where T : FrameworkElement
{
List <T> listChilds = new List <T>();
do
{
if (null == objReference)
{
break;
}
if (String.IsNullOrEmpty(strName))
{
listChilds = VisualTreeHelperEx.GetChildObjects <T>(objReference);
break;
}
int iChildrenCount = VisualTreeHelper.GetChildrenCount(objReference);
if (0 >= iChildrenCount)
{
break;
}
for (int i = 0; i < iChildrenCount; ++i)
{
DependencyObject objChild = VisualTreeHelper.GetChild(objReference, i);
if (objChild is T && ((T)objChild).Name == strName)
{
listChilds.Add((T)objChild);
}
List <T> listGrandChilds = VisualTreeHelperEx.GetChildObjects <T>(objChild, strName);
if (null != listGrandChilds && listGrandChilds.Count > 0)
{
listChilds.AddRange(listGrandChilds);
}
}
}while (false);
return(listChilds);
}
/// <summary>
/// 在指定根类型的情况下，从当前层级开始逐层往上查找特定类型、指定名称的对象
/// </summary>
public static T1 GetAncestorOrSelf <T1, T2>(DependencyObject objReference, string strName) where T1 : FrameworkElement where T2 : FrameworkElement
{
T1 objRetval = null;
do
{
if (null == objReference)
{
break;
}
if (objReference is T2)
{
break;
}
if (String.IsNullOrEmpty(strName))
{
objRetval = VisualTreeHelperEx.GetAncestorOrSelf <T1, T2>(objReference);
break;
}
if (objReference is T1 && ((T1)objReference).Name == strName)
{
objRetval = objReference as T1;
break;
}
if (objReference is FrameworkContentElement)
{
objRetval = VisualTreeHelperEx.GetAncestorOrSelf <T1, T2>((objReference as FrameworkContentElement).Parent, strName);
break;
}
var objParent = VisualTreeHelper.GetParent(objReference);
objRetval = VisualTreeHelperEx.GetAncestorOrSelf <T1, T2>(objParent, strName);
}while (false);
return(objRetval);
}
/// <summary>
/// 深层递归遍历，查找特定类型的子对象
/// </summary>
public static T GetChildObject <T>(DependencyObject objReference) where T : DependencyObject
{
T objRetval = null;
do
{
if (null == objReference)
{
break;
}
int iChildrenCount = VisualTreeHelper.GetChildrenCount(objReference);
if (0 >= iChildrenCount)
{
break;
}
for (int i = 0; i < iChildrenCount; ++i)
{
DependencyObject objChild = VisualTreeHelper.GetChild(objReference, i);
if (null != objChild && objChild is T)
{
objRetval = (T)objChild;
break;
}
T objGrandChild = VisualTreeHelperEx.GetChildObject <T>(objChild);
if (null != objGrandChild)
{
objRetval = objGrandChild;
break;
}
}
}while (false);
return(objRetval);
}
