获取最近的时间24:00:00，在C＃的23:00:00到24:00:00之间(Get the closest time to 24:00:00 between less 23:00:00 to greater 24:00:00 in C#)

 我可以通过将属性设置器移动到我的viewmodel构造函数中并确保视图模型设置为xaml中的datacontext来实现此目的。 
 
 视图模型： 
 
public class MainWindowViewModel
{
    private String[] _columnHeaders;
    public String[] ColumnHeaders
    {
        get { return _columnHeaders; }
        set { _columnHeaders = value; }
    }

    private String[] _rowHeaders;
    public String[] RowHeaders
    {
        get { return _rowHeaders; }
        set { _rowHeaders = value; }
    }

    private bool[,] _data2D;
    public bool[,] Data2D
    {
        get { return _data2D; }
        set { _data2D = value; }
    }


    String[] columnHeaders = { "A", "B", "C" };
    String[] rowHeaders = { "1", "2", "3" };
    bool[,] data2D = { { true, true, false }, { true, true, false }, { true, true, false } };

    public MainWindowViewModel()
    {
        ColumnHeaders = columnHeaders;
        RowHeaders = rowHeaders;
        Data2D = data2D;
    }
}
 
 XAML： 
 
<Window x:Class="Application.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:Application"
    xmlns:dataGrid2D="http://gu.se/DataGrid2D"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525">
  <Window.DataContext>
    <local:MainWindowViewModel />
  </Window.DataContext>
  <Grid>
    <DataGrid Name="matrix" 
              dataGrid2D:ItemsSource.Array2D="{Binding Data2D}"
              dataGrid2D:ItemsSource.ColumnHeadersSource="{Binding ColumnHeaders}"
              dataGrid2D:ItemsSource.RowHeadersSource="{Binding RowHeaders}" />
  </Grid>
</Window>

I was able to get this to work by moving the property setters into my viewmodel constructor and ensuring the viewmodel is set as the datacontext in the xaml.
 
ViewModel:
 
public class MainWindowViewModel
{
    private String[] _columnHeaders;
    public String[] ColumnHeaders
    {
        get { return _columnHeaders; }
        set { _columnHeaders = value; }
    }

    private String[] _rowHeaders;
    public String[] RowHeaders
    {
        get { return _rowHeaders; }
        set { _rowHeaders = value; }
    }

    private bool[,] _data2D;
    public bool[,] Data2D
    {
        get { return _data2D; }
        set { _data2D = value; }
    }


    String[] columnHeaders = { "A", "B", "C" };
    String[] rowHeaders = { "1", "2", "3" };
    bool[,] data2D = { { true, true, false }, { true, true, false }, { true, true, false } };

    public MainWindowViewModel()
    {
        ColumnHeaders = columnHeaders;
        RowHeaders = rowHeaders;
        Data2D = data2D;
    }
}
 
Xaml:
 
<Window x:Class="Application.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:Application"
    xmlns:dataGrid2D="http://gu.se/DataGrid2D"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525">
  <Window.DataContext>
    <local:MainWindowViewModel />
  </Window.DataContext>
  <Grid>
    <DataGrid Name="matrix" 
              dataGrid2D:ItemsSource.Array2D="{Binding Data2D}"
              dataGrid2D:ItemsSource.ColumnHeadersSource="{Binding ColumnHeaders}"
              dataGrid2D:ItemsSource.RowHeadersSource="{Binding RowHeaders}" />
  </Grid>
</Window>