我有以下代码从CSV文件中读取值并进行处理。我想要跳过输入CSV文件的第一行,因为它包含标题文本,但在处理完成后我希望将其添加回去。
List<string> values = new List<string>();
using (StreamReader sr = new StreamReader(filePath))
{
while (sr.Peek() != -1)
{
string line = sr.ReadLine();
List<string> lineValues = line.Split(',').ToList();
var tempMinInt = 1;
var tempValue = 1;
var tempValInt = Convert.ToInt32(lineValues[4]);
if (lineValues[3] == "1876")
{
if (tempValInt % 60 != 0)
{
tempMinInt = (tempValInt / 60) + 1;
tempValue = tempMinInt * 30;
}
else
{
tempMinInt = tempValInt / 60;
tempValue = tempMinInt * 30;
}
}
else if (lineValues[3] == "1875")
{
if (tempValInt != 0)
{
tempValue = 500;
}
else
tempValue = 0;
}
if (lineValues[3] == "1876")
{
values.Add(string.Join(",", lineValues) + "," + "0" + "," + "30" + "," + tempValue.ToString());
}
else if (lineValues[3] == "1875")
{
values.Add(string.Join(",", lineValues) + "," + "1" + "," + "500" + "," + tempValue.ToString());
}
}
}
示例输入CSV如下所示:
id, datetime, msisdn, num, duration
33083,2011-12-19 05:17:57+06:30,98590149,1875,258
33084,2011-12-19 05:22:28+06:30,98590149,1875,69
33085,2011-12-19 05:23:45+06:30,98590149,1875,151
33086,2011-12-19 05:30:21+06:30,98590149,1875,58
33087,2011-12-19 06:44:19+06:30,949826259,1875,66
我希望我的输出结果是这样的:
id, datetime, msisdn, num, duration, type, ammount, total
33083,2011-12-19 05:17:57+06:30,98590149,1875,258,1,500,500
33084,2011-12-19 05:22:28+06:30,98590149,1875,69,1,500,500
33085,2011-12-19 05:23:45+06:30,98590149,1875,151,1,500,500
33086,2011-12-19 05:30:21+06:30,98590149,1875,58,1,500,500
StreamReader
)的缓冲细节可以保证Peek
的结果与下一次读取一致,但是不必担心这一点会更加清洁。 - Jon Skeet