使用linq来压缩数据

Question

如何使用linq压缩以下数据。

这里我想按Column1分组，Column2和Column3是字典的键和值

Pete, small, 2.0
Pete, medium, 3.5
Sbux, small, 2.5
Sbux, medium, 3.0
Mcd, large, 3.0
Mcd, refill, 5.0
Dd, refill, 4.0
Dd, solo, 2.0
cb, xlarge, 4.0
cb, premium, 5.0
Sb, premium, 4.0
Sb, xlarge,refill,extra, 7.0

以下 -

Pete, small, 2.0, medium, 3.5
Sbux, small, 2.5, medium, 3.0
Mcd, large, 3.0, refill, 5.0
Dd, refill, 4.0, solo, 2.0
Cb, xlarge, 4.0, premium, 4.0
Sb, premium, 4.0, xlarge,refill,extra, 7.0

Answer 1

假设Column2组中的Column1值不重复，解决方法如下：

var flat = data
    .GroupBy(item => item.Column1)
    .Select(g => new {
        Column1 = g.Key
    ,   Dict = g.ToDictionary(r => r.Column2, r => r.Column3)
    }).ToList();