UWP中String类型如何转换为Windows.UI.Color

Posted 2020-09-12

我在学习过程中遇到的，我保存主题色为string，但在我想让StatusBar随着主题色变化时发现没法使用。

1 ThemeColorHelper tc = new ThemeColorHelper();              
2 StatusBar statusbar = StatusBar.GetForCurrentView();
3 statusbar.BackgroundColor = (Color)tc.ThemeColor;
4 statusbar.BackgroundOpacity = 1;
5 statusbar.ForegroundColor = Colors.Black；

这样一运行就会报错，

苦恼了很久都没有解决，最后求助大神说通过创建Dictionary来解决。

 1  if (ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons"))
 2             {
 3                 Dictionary<string, Color> color = new Dictionary<string, Color>()
 4                 {
 5                     ["SkyBlue"] = Colors.SkyBlue,
 6                     ["Pink"] = Colors.Pink,
 7                     ["LightGreen"] = Colors.LightGreen
 8                 };
 9                 ThemeColorHelper tc = new ThemeColorHelper();              
10                 StatusBar statusbar = StatusBar.GetForCurrentView();
11                 statusbar.BackgroundColor = color[tc.ThemeColor.ToString()];
12                 statusbar.BackgroundOpacity = 1;
13                 statusbar.ForegroundColor = Colors.Black;
14             }

这样有点麻烦，所以大神有说了另一种方法。

 if(ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons"))
            {
                ThemeColorHelper tc = new ThemeColorHelper();
                Color color = (Color)typeof(Colors).GetProperty(tc.ThemeColor.ToString()).GetValue(this);         
                StatusBar statusbar = StatusBar.GetForCurrentView();
                statusbar.BackgroundColor = color;
                statusbar.BackgroundOpacity = 1;
                statusbar.ForegroundColor = Colors.Black;
            }

完美解决。但需要注意这个需要引用 using System.Reflection;并且必须使用colors里面有的颜色。否则会报错。