c# - 将长度不等的列写入CSV

我在C＃中使用以下数据结构反序列化了JSON文件

[DataContract]
public class SentimentData
{
    [DataMember(Name ="Column1")]
    public IEnumerable<string> Column1 { get; set; }

    [DataMember(Name ="Column-2")]
    public IEnumerable<string> Column2 { get; set; }
}

column1的计数不等于column2的计数。我只想基本上转储第一列中column1的所有数据和第二列中的column2的数据。我尝试了以下操作，但不起作用。

using (var writer = new StreamWriter(@"C:\test.csv"))
{
    var nr = column1data.Select(y => new { Column1= y }).ToList();
    //var nnr = column2data.Select(y => new { Column2 = y }).ToList();

    var csv = new CsvWriter(writer);
    csv.WriteRecords(nr);
    //csv.WriteRecords(nnr);
    writer.Flush();
}

谁能知道该怎么做？

样本json：

{
  "Negative": [
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt"
  ],
  "Non-Negative": [
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt",
    "a.txt",
    "b.txt"
  ]
}

最佳答案

遵循默认Enumerable.Zip的代码的修改版本

派生以下扩展名是允许压缩不等长的集合

public static class MyEnumerablExtensions {

    public static IEnumerable<TResult> ZipOrDefault<TFirst, TSecond, TResult>(this IEnumerable<TFirst> first, IEnumerable<TSecond> second, Func<TFirst, TSecond, TResult> resultSelector) {
        if (first == null) throw Error.ArgumentNull("first");
        if (second == null) throw Error.ArgumentNull("second");
        if (resultSelector == null) throw Error.ArgumentNull("resultSelector");
        using (IEnumerator<TFirst> e1 = first.GetEnumerator()) {
            using (IEnumerator<TSecond> e2 = second.GetEnumerator()) {
                while (e1.MoveNext()) {
                    if (e2.MoveNext()) {
                        yield return resultSelector(e1.Current, e2.Current);
                    } else {
                        yield return resultSelector(e1.Current, default(TSecond));
                    }
                }
                while (e2.MoveNext()) {
                    yield return resultSelector(default(TFirst), e2.Current);
                }
            }
        }
    }
    class Error {
        public static Exception ArgumentNull(string parameter) {
            return new ArgumentNullException(parameter);
        }
    }
}

这将允许您构造所需的对象模型，然后将其写入CSV编写器

using (var writer = new StreamWriter(@"C:\test.csv")) {
    var records = column1data.ZipOrDefault(column2data,
        (Column1, Column2) => new { Column1, Column2 });

    var csv = new CsvWriter(writer);
    csv.WriteRecords(records);
    writer.Flush();
}

关于c# - 将长度不等的列写入CSV，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/52552219/