C# 如何循环字典<；IEnumerable<；字符串>；，字典<；IEnumerable<；十进制>>；？

类别：

代码：

---

结果

组

对象在我看来不符合逻辑。这本字典使循环变得容易，而且似乎更符合逻辑：

foreach(var group in groups)
{
    //????
}

然后在组上循环和登录：

var groups = myClasses
    .GroupBy(o => o.processId)
    .ToDictionary(g => g.Key, g => g.Select(x => new {Measurement = x.measurement, Value = x.measurementValue}));

将产生以下结果：

foreach (var item in groups)
{
    Debug.WriteLine($"Key: {item.Key}, Value: {"\t" + string.Join(Environment.NewLine + "\t\t\t\t", item.Value.Select(i => $"{nameof(i.Measurement)}:{i.Measurement},{nameof(i.Value)}:{i.Value}"))}");
}

---

您确定要将IEnumerable作为字典的键吗？@CodeNotFound它是由Linq生成的，因为您=>

.ToDictionary（g=>g.Select（x=>x.measurement），…）

。通常我们这样做=>

.ToDictionary（g=>g.Key，…

var groups = myClasses
    .GroupBy(o => o.processId)
    .ToDictionary(g => g.Key, g => g.Select(x => new {Measurement = x.measurement, Value = x.measurementValue}));

foreach (var item in groups)
{
    Debug.WriteLine($"Key: {item.Key}, Value: {"\t" + string.Join(Environment.NewLine + "\t\t\t\t", item.Value.Select(i => $"{nameof(i.Measurement)}:{i.Measurement},{nameof(i.Value)}:{i.Value}"))}");
}

Key: 1, Value:  Measurement:height,Value:10
                Measurement:length,Value:11
                Measurement:width,Value:12 
Key: 2, Value:  Measurement:height,Value:20
                Measurement:length,Value:21
                Measurement:width,Value:22