Question

我有一个简单的类定义如下：

Class Data
{
public datetime DATES {get;set;}
public double ValueA {get;set;}
public double ValueB {get;set;}
}

 Dictionary<double, Data> DictA= new Dictionary<double, Data>();
 Dictionary<double, Data> DictB= new Dictionary<double, Data>();

DictA 中的值如下所示; （日期，价值A）

1/1/2001, 100
2/1/2001, 150
3/1/2001, 400

DictB 中的值如下所示;的（日期，VALUEB）

2/1/2001, 200
3/1/2001, 400
4/1/2001, 300
5/1/2001, 150

我还有一个observable collection：

ObservableCollection<Data> curveResults = new ObservableCollection<Data>();  
 public ObservableCollection<Data> CurveResults
        {
            get { return curveResults; }
            set
            {
                curveResults = value;
                base.OnPropertyChanged("CurveResults");
            }
        }

我希望将该集合填充为

Dates, ValueA, ValueB
1/1/2001, 100, null
2/1/2001, 150, 200
3/1/2001, 400, 400
4/1/2001, null, 300
5/1/2001, null, 150

Answer 1

如果要为双重属性设置空值，则类数据应如下所示：

    class Data
{
    public DateTime DATES { get; set; }
    public double? ValueA { get; set; }
    public double? ValueB { get; set; }
}

以下是代码：

        Dictionary<double, Data> DictA = new Dictionary<double, Data>();
        Dictionary<double, Data> DictB = new Dictionary<double, Data>();

        DictA.Add(0, new Data() { DATES = new DateTime(2001, 1, 1), ValueA = 100 });
        DictA.Add(1, new Data() { DATES = new DateTime(2001, 2, 1), ValueA = 150 });
        DictA.Add(2, new Data() { DATES = new DateTime(2001, 3, 1), ValueA = 400 });

        DictB.Add(0, new Data() { DATES = new DateTime(2001, 2, 1), ValueB = 200 });
        DictB.Add(1, new Data() { DATES = new DateTime(2001, 3, 1), ValueB = 400 });
        DictB.Add(2, new Data() { DATES = new DateTime(2001, 4, 1), ValueB = 300 });
        DictB.Add(3, new Data() { DATES = new DateTime(2001, 5, 1), ValueB = 150 });

        var tempDictA = DictA.Values.ToDictionary(x => x.DATES, x => x.ValueA);
        var tempDictB = DictB.Values.ToDictionary(x => x.DATES, x => x.ValueB);

        ObservableCollection<Data> result 
            = new ObservableCollection<Data>(tempDictB.Select(x => tempDictA.ContainsKey(x.Key) 
            ? new Data() { DATES = x.Key, ValueA = tempDictA[x.Key], ValueB = x.Value }
        : new Data() { DATES = x.Key, ValueA = null, ValueB = x.Value })
        .Concat(DictA.Where(x => !tempDictB.ContainsKey(x.Value.DATES))
        .Select(x => new Data() { DATES = x.Value.DATES, ValueA = x.Value.ValueA, ValueB = null }))
        .OrderBy(x => x.DATES));

将两个词典合并为可观察的集合 - C＃

1 个答案: