WPF遍历当前容器中某种控件的方法

原文: WPF遍历当前容器中某种控件的方法 版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/m0_37591671/article/details/79528845

• • • 1.目的：
    • 2.实现思路：

在设计界面的时候遇到了这样一个问题：一个窗口中有六个按钮，我希望点击某一个按钮的时候，该按钮能够高亮显示，即：更换该按钮的背景图片，点击第二个的时候，第二个高亮显示，其他按钮还是显示为普通按钮颜色，如图：

2.1 在每一次点击的时候，遍历当前容器中所有Button，但是我们这里只需要下面六个，然后根据按钮的名称，来依次给按钮背景图片赋予相应的路径，即还原到普通普片的路径；在给点击的按钮背景图片赋予高亮图片的路径。

2.2 还原到普通普片的路径

//还原到普通普片的路径
 public static void BackToUsedPicture(UIElement uIElement)
        {
             //遍历当前容器中所有Button
            List<Button> btnList=FindChirldHelper.FindVisualChild<Button>(uIElement);
            foreach (var item in btnList)
            {
                Image img = new Image();
                if (item.Name== "Weather_btn")
                {
                    img.Source = new BitmapImage(new Uri("../../Images/MonitorData/weatherBUTTON.jpg", UriKind.Relative));                 
                }
                else if (item.Name == "Temperature_btn")
                {
                    img.Source = new BitmapImage(new Uri("../../Images/MonitorData/temperatureBUTTON.jpg", UriKind.Relative));
                }
                else if (item.Name == "Vibration_btn")
                {
                    img.Source = new BitmapImage(new Uri("../../Images/MonitorData/virbrationBUTTON.jpg", UriKind.Relative));
                }
                else if (item.Name == "Stress_btn")
                {
                    img.Source = new BitmapImage(new Uri("../../Images/MonitorData/stressBUTTON.jpg", UriKind.Relative));
                }
                else if (item.Name == "Deformation_btn")
                {
                    img.Source = new BitmapImage(new Uri("../../Images/MonitorData/DeformationBUTTON.jpg", UriKind.Relative));
                }
                else if (item.Name == "Pedestria_btn")
                {
                    img.Source = new BitmapImage(new Uri("../../Images/MonitorData/peopleBUTTON.jpg", UriKind.Relative));
                }
                item.Content = img;
            }                                                
        }           

2.3 寻找当前容器中某种控件的 方法：

public static class FindChirldHelper
    {
       public static List<T> FindVisualChild<T>(DependencyObject obj) where T : DependencyObject
        {
            try
            {
                List<T> TList = new List<T> { };
                for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
                {
                    DependencyObject child = VisualTreeHelper.GetChild(obj, i);
                    if (child != null && child is T)
                    {
                        TList.Add((T)child);
                        List<T> childOfChildren = FindVisualChild<T>(child);
                        if (childOfChildren != null)
                        {
                            TList.AddRange(childOfChildren);
                        }
                    }
                    else
                    {
                        List<T> childOfChildren = FindVisualChild<T>(child);
                        if (childOfChildren != null)
                        {
                            TList.AddRange(childOfChildren);
                        }
                    }
                }
                return TList;
            }
            catch (Exception ee)
            {
                MessageBox.Show(ee.Message);
                return null;
            }
        }
    }           

3.3 上端使用：

private void Weather_btn_Click(object sender, RoutedEventArgs e)
        {            

            ChangeButtonToLight((Button)sender);
        }

  public void ChangeButtonToLight(Button button)
        {
            ChangeButtonImage.BackToUsedPicture(this);
            Image img = new Image();
            if (button.Name == "Weather_btn")
            {
                img.Source = new BitmapImage(new Uri("../../Images/MonitorData/weatherBUTTONLight.png", UriKind.Relative));
            }
            else if (button.Name == "Temperature_btn")
            {
                img.Source = new BitmapImage(new Uri("../../images/MonitorData/temperatureBUTTONLight.png", UriKind.Relative));
            }
            else if (button.Name == "Vibration_btn")
            {
                img.Source = new BitmapImage(new Uri("../../Images/MonitorData/virbrationBUTTON.jpg", UriKind.Relative));
            }
            else if (button.Name == "Stress_btn")
            {
                img.Source = new BitmapImage(new Uri("../../Images/MonitorData/stressBUTTON.jpg", UriKind.Relative));
            }
            else if (button.Name == "Deformation_btn")
            {
                img.Source = new BitmapImage(new Uri("../../Images/MonitorData/DeformationBUTTON.jpg", UriKind.Relative));
            }
            else if (button.Name == "Pedestria_btn")
            {
                img.Source = new BitmapImage(new Uri("../../Images/MonitorData/peopleBUTTON.jpg", UriKind.Relative));
            }
            button.Content = img;
        }