使用 CHOETL 将 JSON 转换为 CSV，在一行而不是列中显示值
我正在将 JSON 文件转换为 CSV 文件。JSON 具有多个嵌套对象。转换时，我能够将所有值从 JSON 中获取并放入 CSV 中。但是，所有值都显示为一行，且同一标题重复多次。我正在使用 CHOETL 库。
using (var csv = new ChoCSVWriter("file1.csv").WithFirstLineHeader().WithDelimiter(","))
{
using (var json = new ChoJSONReader("file2.json")
.WithField("RecordID", jsonPath: "$..Events[*].RecordId")
.WithField("RecordType", jsonPath: "$..Events[*].RecordType")
.WithField("EventDate", jsonPath: "$..Events[*].EventDate")
{
csv.Write(json);
}
}
结果显示为
记录 ID_0 记录 ID_1 记录 ID_2
123 456 789
而不是作为
记录ID
123
456
789
这是 JSON 文件
[
{
"Id": "3e399241",
"IdLineage": [
"sfdsfdsfs",
"sdfdsfdsf"
],
"Individuals": [
{
"Id": "1232112",
"IdLineage": [
"fdsfsd1"
],
"Events": [
{
"RecordId": "2132121321",
"RecordType": "SALE",
"EventDate": "2016-01-04T05:00:00Z"
},
{
"RecordId": "123213212",
"RecordType": "SALE",
"EventDate": "2012-07-16T04:00:00Z"
}
]
},
{
"Id": "ssf2112",
"IdLineage": [],
"Events": [
{
"RecordId": "123213ds21",
"RecordType": "ACXIOMRECORD",
"EventDate": "2017-12-17T03:33:54.875Z"
}
]
},
{
"Id": "asadsad",
"IdLineage": [],
"Events": [
{
"RecordId": "213213sa21",
"RecordType": "SALE",
"EventDate": "2018-03-09T05:00:00Z"
}
]
}
]
}
]
墨色风雨1回答
-
汪汪一只猫
根据您发布的示例代码，您正在从 JSON 创建对象，如下所示{ RecordID : Array, RecordType: Array, EventDate: Array}这会生成以下格式的 CSV，这是预期的。RecordID_0, RecordID_1, RecordID_2, RecordType_0, RecordType_1, ....如果您想创建以下格式的 CSV，则必须修复每个记录字段上的 json 路径RecordID, RecordType, EventData示例代码using (var csv = new ChoCSVWriter("file1.csv").WithFirstLineHeader().WithDelimiter(",")){ using (var json = new ChoJSONReader("file2.json") .WithField("RecordID", jsonPath: "$..Events.RecordId") .WithField("RecordType", jsonPath: "$..Events.RecordType") .WithField("EventDate", jsonPath: "$..Events.EventDate") { csv.Write(json); }}更新 #1： 查看示例 JSON 后，您可以通过以下方式提取数据并生成预期格式的 CSV 文件StringBuilder msg = new StringBuilder();using (var w = new ChoCSVWriter(msg) .WithFirstLineHeader() ){ using (var r = new ChoJSONReader("Sample32.json") .WithJSONPath("$..Events[*]") ) { w.Write(r); }}Console.WriteLine(msg.ToString());输出#1：RecordId,RecordType,EventDate2132121321,SALE,1/4/2016 5:00:00 AM123213212,SALE,7/16/2012 4:00:00 AM123213ds21,ACXIOMRECORD,12/17/2017 3:33:54 AM213213sa21,SALE,3/9/2018 5:00:00 AM更新#2：您必须使用 Linq 将 id 与事件成员组合起来。下面的示例展示了如何using (var fw = new StreamWriter("Sample32.csv", true)){ using (var w = new ChoCSVWriter(fw) .WithFirstLineHeader() ) { using (var r = new ChoJSONReader("Sample32.json") .WithJSONPath("$..Individuals[*]") ) { w.Write(r.SelectMany(r1 => ((dynamic[])r1.Events).Select(r2 => new { r1.Id, r2.RecordId, r2.RecordType, r2.EventDate }))); } }}Console.WriteLine(File.ReadAllText("Sample32.csv"));输出#2：Id,RecordId,RecordType,EventDate1232112,2132121321,SALE,1/4/2016 5:00:00 AM1232112,123213212,SALE,7/16/2012 4:00:00 AMssf2112,123213ds21,ACXIOMRECORD,12/17/2017 3:33:54 AMasadsad,213213sa21,SALE,3/9/2018 5:00:00 AM
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