需要有关datagrid的帮助

Question

我有数据网格（见下文）有一些日期时间的列如何使背景变为红色，其中rooomNumer是2011年1月8日至2011年5月8日的777，代码落后？房间号列与可观察集合绑定

 ObservableCollection<RoomsInfoData> _RoomsInfoCollection = new ObservableCollection<RoomsInfoData>();
        public RoomsInfo()
   public ObservableCollection<RoomsInfoData> RoomsInfoCollection
        {
            get { return _RoomsInfoCollection; }
        }

        public class RoomsInfoData
        {
            public string RoomType { get; set; }
            public string RoomNumber { get; set; }
            public string RoomStatus { get; set; }
        }
HProDataContext db = new HProDataContext();
            var _RoomNumber = (from d in db.SelectRooms select d.roomnumber).ToList();
            var _RoomType = (from d in db.SelectRooms select d.roomtype).ToList();
            var _RoomStatus = (from d in db.SelectRooms select d.status).ToList();

            for (int i = 0; i < _RoomNumber.Count; i++)
            {

                _RoomsInfoCollection.Add(new RoomsInfoData { RoomNumber = _RoomNumber[i], RoomType = _RoomType[i], RoomStatus = _RoomStatus[i] });
            }

Answer 1

假设

1. “this”指的是放置此数据网格的窗口或用户控件。
2. this.dataGrid指的是您在其中添加了代码后面的列的数据网格。

我们将在Window / UserControl的Resources集合中指定一个样式......就像这样

    <UserControl.Resources> <!-- could be Window.Resources if datagrid lies in a Window -->
            <Style x:Key="RoomNumberValidationCellStyle"
                       TargetType="{x:Type DataGridCell}"> <!-- DataGridCell because we need to apply this style to specific columns -->
                    <Style.Triggers>
                            <DataTrigger Binding="{Binding Path=RoomNumber}" Value="777">
                                    <Setter Property="Background" Value="Red" />
                            </DataTrigger>
                    </Style.Triggers>
            </Style>
    </UserControl.Resources>

在将所有列设置为this.dataGrid之后，在代码后面的

...执行此操作...

    foreach(var col in this.dataGrid.Columns)
    {
            var headerText = (string)col.Header;
            if (headerText == "1/8/2011" || headerText.Header == "2/8/2011"
            || headerText.Header == "3/8/2011" || headerText.Header == "4/8/2011"
            || headerText.Header == "5/8/2011")
                    col.CellStyle = this.FindResource("RoomNumberValidationCellStyle") as Style;
    }

如果有帮助，请告诉我。

Answer 2

<Style x:Key="RedRowStyle" TargetType="{x:Type dg:DataGridRow}">
        <Setter Property="Background" Value="Red"/>
        <Style.Triggers>
            <DataTrigger Binding="{Binding PropertyName}" Value="777" >
                <Setter Property="Background" Value="DarkGray" />
                <Setter Property="Foreground" Value="White" />
            </DataTrigger>
        </Style.Triggers>
    </Style>

只需将PropertyName替换为ViewModel中属性为777的属性，并将其应用于正确的行。