CsvHelper ConvertUsing不改变输出 [英] CsvHelper ConvertUsing not changing output
问题描述
我试图使用 ConvertUsing 方法href=\"https://github.com/JoshClose/CsvHelper\" rel=\"nofollow\"> CsvHelper 库(v 2.4.0)。
I'm trying to use the ConvertUsing
method of the CsvHelper library (v 2.4.0).
我读过有关的 ConvertUsing ,但不能让它开始工作。
I've read the documentation about ConvertUsing but can't get it to work.
我用一个简单的类:
public class Test
{
public long Id { get; set; }
public string Title { get; set; }
}
通过这种 ClassMap
:
public class TestClassMap : CsvClassMap<Test>
{
public override void CreateMap()
{
Map(m => m.Id).Name("id").ConvertUsing(row => 11111);
Map(m => m.Title).Name("title").ConvertUsing(row => row.GetField("title") + " 123");
}
}
我的代码,使用这些创建类的实例然后将它写入到CSV:
My code which uses these creates an instance of the class and then writes it to CSV:
var test = new Test() { Id = 99, Title = "Test title" };
using (var streamWriter = new StreamWriter("test.csv"))
{
var csv = new CsvWriter(streamWriter);
csv.Configuration.RegisterClassMap<TestClassMap>();
csv.WriteRecord(test);
}
不过输出文件 test.csv
始终是以下格式:
id,title
99,Test title
我在寻找的输出是:
id,title
11111,Test title 123
而 ConvertUsing
被忽略。我试着只转换编号
,只有标题
,但这并不能工作。
And the ConvertUsing
is being ignored. I've tried only converting the Id
, and only the Title
, but this doesn't work either.
任何想法,我要去哪里错了?
Any ideas where I'm going wrong?
推荐答案
目前 ConvertUsing
阅读时才使用。
您可以使用自定义类型转换器,如果你想自定义输出。您也可以通过类型转换器选项一些有限的能力。
You can use a custom type converter if you want to customize the output. You also have some limited abilities through the type converter options.
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