WPF查詢指定型別名的控制元件，超簡單的方法

/// <summary>
/// 從當前控制元件開始，查詢指定型別名的控制元件
/// </summary>
/// <param name="obj">當前控制元件</param>
/// <param name="systemTypeName">指定控制元件的型別名</param>
/// <returns></returns>
private object FindControl(DependencyObject obj,string systemTypeName)
{
    if
 
 (obj.DependencyObjectType.SystemType.Name == systemTypeName)
    {
        return obj;
    }

    return FindControl(VisualTreeHelper.GetParent(obj), systemTypeName);
}