从c#创建CSV文件:excel中的额外字符

Question

我从C#应用程序创建一个CSV文件,但字符显示在第一个单元格中的Excel和OpenOfficeCalc中,但不显示在记事本和Notepad ++中.

这是我的代码:

StreamWriter streamWriter = new StreamWriter(new FileStream(filePath, FileMode.Create), Encoding.UTF8);
List<MyData> myData = GetMyData;

foreach(MyData md in myData)
{
    streamWriter.WriteLine(md.Date + "," + md.Data1 + "," + md.Data2 + "," + md.Data3 + "," + md.Data4);
}
streamWriter.Flush();
streamWriter.Close();

MyData 是

public struct MyData
{
    public float Data1;
    public float Data2;
    public float Data3;
    public float Data4;
    public DateTime Date;
}

这是Notepad和Notepad ++中的结果:

01/12/2010 00:04:00,0.08,78787.4,9.1,5
01/12/2010 00:09:00,0.07,78787.42,9.1,5
01/12/2010 00:14:00,0.06,78787.44,9.1,5
01/12/2010 00:19:00,1.45,78787.58,9.1,5
01/12/2010 00:24:00,2.13,78788.15,9.1,5
01/12/2010 00:29:00,1.72,78788.53,9,5
01/12/2010 00:34:00,0.89,78788.73,9,5

在Excel和Calc中:

01/12/2010 00:04:00   0.08    78787.4     9.1    5
01/12/10 00:09           0.07    78787.42    9.1    5
01/12/10 00:14           0.06    78787.44    9.1    5
01/12/10 00:19           1.45    78787.58    9.1    5
01/12/10 00:24           2.13    78788.15    9.1    5
01/12/10 00:29           1.72    78788.53    9      5
01/12/10 00:34           0.89    78788.73    9      5

这三个字符在文件的开头只出现一次,然后一切都应该是这样.

我的问题是:

来自哪里以及如何删除它？

我试图在StringBuilder中编写输出并调试以查看其内容,但它没有这些字符.

Answer 1

这是UTF8编码的BOM

看看这个问题:编写没有字节顺序标记(BOM)的文本文件？