导出到csv以忽略注释中的逗号和换行符
本文关键字:换行符 注释 csv | 更新日期: 2023-09-27 18:16:18
我有下面的代码,导出到csv很好,但刚刚意识到它不处理逗号或"评论"字段文本框中的换行符。是否有一种方法可以忽略特定字段或所有字段中的逗号和换行符?
private void saveFileDialogTrack_FileOk(object sender, CancelEventArgs e)
{
StringBuilder str = new StringBuilder();
foreach (DataRow dr in this.trackDataSet.Track)
{
foreach (object field in dr.ItemArray)
{
str.Append(field.ToString() + ",");
}
str.Replace(",", Environment.NewLine, str.Length - 1, 1);
}
string name = saveFileDialogTrack.FileName;
try
{
System.IO.File.WriteAllText(name, str.ToString());
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
str = null;
}
csv样本(前几个字段)Barbagallo,31,39,51.01,
private void openFileDialogTrack_FileOk(object sender, CancelEventArgs e)
{
try
{
using (StreamReader SR = new StreamReader(openFileDialogTrack.FileName))
{
while (!SR.EndOfStream)
{
var CSValues = SR.ReadLine().Split(',');
SqlCeConnection myConnection = new SqlCeConnection("Data Source = Track.sdf");
myConnection.Open();
String str = (@"INSERT INTO Track (Track, StartFinishLineNSDegrees, StartFinishLineNSMinutes,
......................
VALUES (@track, @SFNSD, @SFNSM,
......................
SqlCeCommand cmd = new SqlCeCommand(str, myConnection);
cmd.Parameters.AddWithValue("@track", CSValues[0] == string.Empty ? (object)DBNull.Value : CSValues[0]);
cmd.Parameters.AddWithValue("@SFNSD", CSValues[1] == string.Empty ? (object)DBNull.Value : CSValues[1]);
cmd.Parameters.AddWithValue("@SFNSM", CSValues[2] == string.Empty ? (object)DBNull.Value : CSValues[2]);
根据RFC4180 -逗号分隔值(CSV)文件的通用格式和MIME类型:
包含换行符(CRLF)、双引号和逗号的字段应该用双引号括起来。
为安全起见,并使编码更容易,您可以将所有字段用引号括起来。
替换:
str.Append(field.ToString() + ",");
与这个:
str.Append(string.Format("'"{0}'",", field));
在将字符串添加到stringbuilder
之前,我创建了一个方法来添加引号中的文本。private string HandelQuote(string text)
{
if (string.IsNullOrEmpty(text)) return string.Empty;
var containsQuote = text.Contains('"');
var containsComma = text.Contains(',');
var addQuote = containsComma || containsQuote;
if (addQuote)
{
text = text.Replace("'"", "'"'"");
}
return addQuote ? "'"" + text + "'"" : text;
}