根据在多个单元格中拆分字符串将一行拆分为多行

Question

尝试根据两个单元格中的字符串将一行分成多行。它类似于问题 LINQ to separate column value of a row to different rows in .net 但我需要根据产品和成本列进行拆分，而不是仅根据产品列进行拆分

SNo.	Product	Cost
1	colgate,closeup,pepsodent	50,100,150
2	rin,surf	100

进入

SNo.	Product	Cost
1	colgate	50
1	closeup	100
1	pepsodent	150
2	rin	100
2	surf	100

我正在使用 Linq to Object Entity Framework

Answer 1

尝试以下操作。由于您没有提供任何模型，因此名称可能不准确。

var loaded = ctx.Products.ToList();

var query = 
    from p in loaded
    from sp in p.Product.Split(',').Zip(p.Cost.Split(','), (p, c) => (p, c))
    select new 
    {
        Sno = p.Sno,
        Product = sp.p,
        Cost = sp.c
    };

var splitted = query.ToList();

Answer 2

使用@SvyatoslavDanyliv 命名，这里是一个答案：

var loaded = ctx.Products.ToList();

var query = 
    from p in loaded
    from sp in p.Product.Split(',').Zip(p.Cost.Split(','), (p, c) => (p, c))
    select new 
    {
        Sno = p.Sno,
        Product = sp.p,
        Cost = sp.c
    };

var splitted = query.ToList();

我觉得有点复杂。我更喜欢使用扩展方法来创建 Zip 的变体，它重复较短序列的最后一个元素以匹配较长序列：

public static class EnumerableExt {
    public static IEnumerable<(T1 First,T2 Second)> ZipExtend<T1,T2>(this IEnumerable<T1> s1, IEnumerable<T2> s2) {
        var s1e = s1.GetEnumerator();
        var s2e = s2.GetEnumerator();

        T1 s1eLast = default;
        T2 s2eLast = default;
        bool has_s2 = false;
        if (s1e.MoveNext()) {
            do {
                s1eLast = s1e.Current;
                if (s2e.MoveNext()) {
                    s2eLast = s2e.Current;
                    has_s2 = true;
                }
                else if (!has_s2)
                    yield break;
                yield return (s1eLast, s2eLast);
            } while (s1e.MoveNext());
            if (has_s2)
                while (s2e.MoveNext())
                    yield return (s1eLast, s2e.Current);
        }

        yield break;
    }
}

那么答案是：

var query = 
    from p in loaded
    from pr in p.Product.Split(',').ZipExtend(p.Cost.Split(','))
    select new 
    {
        Sno = p.Sno,
        Product = pr.First,
        Cost = pr.Second
    };

var splitted = query.ToList();

根据在多个单元格中拆分字符串将一行拆分为多行

Split One Row into many based on splitting string in multiple cells

linq

entity-framework