[英]Save List<string> and List<double> to a .txt file's specific column
[英]How to convert csv file's specific column to string List
有誰知道如何將 csv 文件中的特定列轉換為字符串 List ? 我正在嘗試從 csv 文件中獲取“聯系電話”列表。 (請在下面查看我的 csv 文件)
List<string> contactNumberList = new List<string>();
-- contactNumberList.Add("1888714"); (Manual)
---contactNumberList.Add("1888759");(Manual)
"Email","Opt In Date","Opted Out","Opt In Details","Email Type","Opted Out Date","Opt Out Details","Contact Number","Salutation"
"test1@testApp.com","05/01/2014 11:23 AM","F","User Name: capn@goldpop.org.uk. IP Address: 62.213.118.139","0","","","1888714","Mrs Hall"
"test2@testApp.com","05/01/2014 11:23 AM","F","User Name: capntransfer@goldpop.org.uk. IP Address: 62.213.118.139","0","","","1888759","Mrs Heyworth"
對於解析 CSV,我建議使用 ligrary,因為如果值被轉義,簡單地按行 / 列分隔符拆分可能會導致錯誤。
IE
“約翰先生,鮑勃·史密斯”
是一個有效的 CSV,因為它用引號轉義。 但是拆分功能將停止工作。
一個有效的選擇是 LumenWorks(您可以在 NuGet 中找到它)。
IE
using (var csv = new CsvReader(r, false, csvParserConfiguration.ColumnSeparator, '"', '"', '#', ValueTrimmingOptions.None))
{
// Read lines
while (csv.ReadNextRecord())
{
contactNumberList.Add[7];
}
}
逐行讀取文件,用逗號分隔Split()
,選擇所需的列,剪掉引號並添加到列表中?
嘗試這個:
int columnId = 3;
string[] lines = File.ReadAllLines(@"C:\test.csv");
var list = lines.Select(line =>
{ var values = line.Split(';');
return values[columnId];
});
您可以嘗試以下操作:
var reader = new StreamReader(File.OpenRead(@"C:\test.csv"));
List<string> contactNumbersList = new List<string>();
while (!reader.EndOfStream)
{
var line = reader.ReadLine();
var values = line.Split(',');
contactNumbersList.Add(values[7]);
}
但更好的是,您可以使用像CSV Reader這樣的專用庫。
IEnumerable<string> strings = System.IO.File.ReadAllLines({filepath})
.Select(x => x.Split(';')[{columnId}])
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