[英]c# csvhelper how to parse string to datetime object
我有以下 csv
Date,Stage,Count,Time,Index
20151231,4,3,9:45:3991,1527.23510
20150903,4,613,12:18:0483,1605.56522
和以下代码
public List<DailyData> ReadDailyData(string dataFolder)
{
using (var sr = new StreamReader(dataFolder))
{
var reader = new CsvReader(sr);
return reader.GetRecords<DailyData>().ToList();
}
}
public class DailyData
{
public string Date { get; set; }
public string Stage { get; set; }
public string Count { get; set; }
public string Time { get; set; }
public string Index { get; set; }
}
CsvHelper 在转换为字符串时工作正常但是当我尝试解析为 DateTime 时出现异常
即
public class DailyData
{
public DateTime Date { get; set; } // should be Date obj
public string Stage { get; set; }
public string Count { get; set; }
public DateTime Time { get; set; } // should be Time obj
public string Index { get; set; }
}
我得到:“字符串未被识别为有效的日期时间。”
您可以使用地图类来提供所需的日期和时间格式。
class DailyData
{
public DateTime Date { get; set; } // should be Date obj
public string Stage { get; set; }
public string Count { get; set; }
public DateTime Time { get; set; } // should be Time obj
public string Index { get; set; }
}
public class DailyDataMap: ClassMap<DailyData> {
Map(m => m.Date).TypeConverterOption.Format("yyyyMMdd");
Map(m => m.Stage);
Map(m => m.Count);
Map(m => m.Time).TypeConverterOption.Format("H:mm:ffff");
Map(m => m.Index);
}
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