Mvvm 使用xamforms.controls.calendar生成日历活动

所以，和大多数人一样，我还是个新手，正在浏览c#和Xamarin.Forms的所有内容，但速度异常缓慢。使用XamarinForms和XamForms.Controls.Calendar插件，我试图构建一个日历，该日历可以获取发生的日期和事件的列表，并在底部放置一个小的颜色代码。我回顾了我能找到的所有源代码和主题，并对其进行了重构，构建了下面的代码版本，它符合我的要求，但很难看……我想让它比之前使用的示例和我所做的更具可重用性和MVVM。本质上，我的计划是基于bool值（应该能够在代码中看到）将颜色绑定到活动。所以，挑战是我真的不知道去哪里或做什么，但下面是我认为需要发生的事情。如果这是一个简单的问题，请原谅我，我只是没有看到

XamlPage

 <?xml version="1.0" encoding="UTF-8"?>
 <ContentPage xmlns="http://xamarin.com/schemas/2014/forms" 
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         xmlns:controls="clr-namespace:XamForms.Controls;assembly=XamForms.Controls.Calendar"
         x:Class="MyApp.View.LogPageViews.LogPage"
         ControlTemplate="{StaticResource MainPageTemplate}">
<ContentPage.Content>
    <ScrollView>
        <StackLayout>
            <controls:Calendar x:Name="calendar Padding="10,0,10,0" SelectedBorderWidth="4" DisabledBorderColor="Black" ShowNumberOfWeek="false" StartDay="Monday TitleRightArrowTextColor="Blue" TitleLabelTextColor="Purple" TitleLeftArrowTextColor="Blue" WeekdaysFontSize="12" SelectedDate="{Binding Date}" SpecialDates="{Binding Workout}" DateCommand="{Binding DateChosen}" >
            </controls:Calendar>
        </StackLayout>
    </ScrollView>
</ContentPage.Content>
</ContentPage>

我尝试过的每一件事都让我在代码中犯了错误…这可能是错误的几件事…我甚至不知道这是不是好代码。我当前的错误是严重性代码说明项目文件行抑制状态 错误CS1503参数1:无法从“MyApp.ViewModel.CalendarActivityVM”转换为“XamForms.Controls.SpecialDate”

namespace MyApp.View.LogPageViews
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class LogPage : ContentPage
    {  
        public LogPage ()
        {
            InitializeComponent ();
                    var Dates = new List<SpecialDate>();
                    NavigationPage.SetHasNavigationBar(this, false);
                    DateTime testdate = new DateTime(2018, 06, 26);
    //This is where I am getting the errors when I try to do anything like this.  Getting errors like "Cannot convert from" and "Cannot use like a method" 
//I did have code here that worked, but refactored it out and got stuck         
            calendar.SpecialDates.Add(new CalendarActivityVM(testdate, true, true, true, true));
            calendar.SelectedDate = (DateTime.Now);
        }
    }
}

名称空间MyApp.View.LogPageViews
{
[XamlCompilation（XamlCompilationOptions.Compile）]
公共部分类日志页：ContentPage
{  
公共日志页（）
{
初始化组件（）；
变量日期=新列表（）；
SetHasNavigationBar（这个，false）；
DateTime testdate=新的日期时间（2018,06,26）；
//这就是我在尝试执行类似操作时遇到的错误。遇到诸如“无法从转换”和“无法像方法一样使用”之类的错误
//我这里的代码确实有效，但经过重构后就卡住了
添加（新的CalendarActivityVM（testdate，true，true，true，true））；
calendar.SelectedDate=（DateTime.Now）；
}
}
}

我的日历活动VM（我不知道这是否正确……这是我学习的地方，我认为这是正确的）

名称空间MyApp.ViewModel
{
公共类CalendarActivityVM
{
公共日期时间日期时间{get；set；}
公共bool A{get；set；}
公共布尔B{get；set；}
公共布尔C{get；set；}
公共bool D{get；set；}
公共日历活动VM（DateTime DateTime、bool a、bool b、bool c、bool d）
{
Datetime=Datetime；
A=A；
B=B；
C=C；
D=D；
var AColor=新颜色（）；
var BColor=新颜色（）；
var CColor=新颜色（）；
var DColor=新颜色（）；
如果（A==true）{AColor=Color.Red；}否则{AColor=Color.Transparent；}；
如果（B==true）{BColor=Color.Yellow；}否则{BColor=Color.Transparent；}；
如果（C==true）{CColor=Color.Green；}否则{CColor=Color.Transparent；}；
如果（D==true）{DColor=Color.Blue；}否则{DColor=Color.Transparent；}；
var white_row=新图案{WidthPercent=.1275f，HightPercent=0.75f，Color=Color.Transparent}；
var white_col=新图案{WidthPercent=0.04f，HightPercent=1f，Color=Color.Transparent}；
var aPattern=新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=AColor}；
var bPattern=新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=BColor}；
var cPattern=新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=CColor}；
var dPattern=新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=DColor}；
风险值活动=新的背景模式（7）
{
模式=新列表
{
白排，白排，白排，白排，白排，白排，白排，白排，白排，
A模式，白色颜色，B模式，白色颜色，C模式，白色颜色，D模式
}
};
}
}
}

根据示例，正常的“SpecialDate”看起来是这样的……这就是我尝试重构的原因：

calendar.SpecialDates = new List<SpecialDate>{
                new SpecialDate(DateTime.Now.AddDays(3))
                {
                    BackgroundColor = Color.White,
                    TextColor = Color.Black,
                    Selectable = true,
                    BackgroundPattern = new BackgroundPattern(7)
                {
                    Pattern = new List<Pattern>
                        {
                        new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Red, Text = "X", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Gold, Text = "Y", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Green, Text = "Z", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Purple,Text = "Q", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},

                            white_row,white_row,white_row,white_row,white_row,white_row,white_row,

                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Blue},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Chocolate},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Cyan},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Fuchsia},

                            white_row,white_row,white_row,white_row,white_row,white_row,white_row,

                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Crimson},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Aquamarine},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.OrangeRed},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.DarkOrchid},

                            white_row,white_row,white_row,white_row,white_row,white_row,white_row,

                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Black},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.DeepSkyBlue},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.DarkGoldenrod},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Firebrick},
                        }
                    }
                }

calendar.SpecialDates=新列表{
新的特殊日期（DateTime.Now.AddDays（3））
{
背景颜色=颜色。白色，
TextColor=Color.Black，
可选=真，
背景模式=新背景模式（7）
{
模式=新列表
{
新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=Color.Red，Text=“X”，TextColor=Color.White，TextSize=11，TextAlign=TextAlign.Middle}，
白山，
新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=Color.Gold，Text=“Y”，TextColor=Color.White，TextSize=11，TextAlign=TextAlign.Middle}，
白山，
新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=Color.Green，Text=“Z”，TextColor=Color.White，TextSize=11，TextAlign=TextAlign.Middle}，
白山，
新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=Color.Purple，Text=“Q”，TextColor=Color.White，TextSize=11，TextAlign=TextAlign.Middle}，
白排，白排，白排，白排，白排，白排，白排，白排，白排，
新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=Color.Blue}，
白山，
新图案{WidthPercent=0.22f，HightPercent=0.22f，Color=Color.Chocolate}，
白山，
calendar.SpecialDates = new List<SpecialDate>{
                new SpecialDate(DateTime.Now.AddDays(3))
                {
                    BackgroundColor = Color.White,
                    TextColor = Color.Black,
                    Selectable = true,
                    BackgroundPattern = new BackgroundPattern(7)
                {
                    Pattern = new List<Pattern>
                        {
                        new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Red, Text = "X", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Gold, Text = "Y", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Green, Text = "Z", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Purple,Text = "Q", TextColor=Color.White, TextSize=11, TextAlign=TextAlign.Middle},

                            white_row,white_row,white_row,white_row,white_row,white_row,white_row,

                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Blue},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Chocolate},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Cyan},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Fuchsia},

                            white_row,white_row,white_row,white_row,white_row,white_row,white_row,

                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Crimson},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Aquamarine},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.OrangeRed},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.DarkOrchid},

                            white_row,white_row,white_row,white_row,white_row,white_row,white_row,

                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Black},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.DeepSkyBlue},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.DarkGoldenrod},
                            white_col,
                            new Pattern{ WidthPercent = 0.22f, HightPercent = 0.22f, Color = Color.Firebrick},
                        }
                    }
                }

private static SpecialDate TestMethod(DateTime datetime, bool A, bool B, bool C, bool D)
    {
        var AColor = new Color();
        var BColor = new Color();
        var CColor = new Color();
        var DColor = new Color();

        if (A == true) { AColor = Color.Red; } else { AColor = Color.Transparent; };
        if (B == true) { BColor = Color.Yellow; } else { BColor = Color.Transparent; };
        if (C == true) { CColor = Color.Green; } else { CColor = Color.Transparent; };
        if (D == true) { DColor = Color.Blue; } else { DColor = Color.Transparent; };

        var white_row = new Pattern { WidthPercent = .1275f, HightPercent = 0.75f, Color = Color.Transparent };
        var white_col = new Pattern { WidthPercent = 0.04f, HightPercent = 1f, Color = Color.Transparent };
        var aPattern = new Pattern { WidthPercent = 0.22f, HightPercent = 0.22f, Color = AColor };
        var bPattern = new Pattern { WidthPercent = 0.22f, HightPercent = 0.22f, Color = BColor };
        var cPattern = new Pattern { WidthPercent = 0.22f, HightPercent = 0.22f, Color = CColor };
        var dPattern = new Pattern { WidthPercent = 0.22f, HightPercent = 0.22f, Color = DColor };

        return new SpecialDate(datetime)
        {
            BackgroundColor = Color.White,
            TextColor = Color.Black,
            Selectable = true,
            BackgroundPattern = new BackgroundPattern(7)
            {
                Pattern = new List<Pattern>
                        {

                                white_row, white_row, white_row, white_row, white_row, white_row, white_row,
                                    aPattern, white_col, bPattern, white_col, cPattern, white_col, dPattern

                        }
            }
        };
    }