CSVFileHelper.cs
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using log4net;
using OnlineStore.Common;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Windows.Forms;
namespace OnLineStore.Common
{
public class CSVFileHelper
{
public static readonly ILog LOGGER = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// 将DataTable中数据写入到CSV文件中
/// </summary>
/// <param name="dt">提供保存数据的DataTable</param>
/// <param name="fileName">CSV的文件路径</param>
public static void SaveCSV(DataTable dt, string fullPath)
{
FileInfo fi = new FileInfo(fullPath);
if (!fi.Directory.Exists)
{
fi.Directory.Create();
}
FileStream fs = new FileStream(fullPath, System.IO.FileMode.Create, System.IO.FileAccess.Write);
//StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default);
StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.UTF8);
string data = "";
//写出列名称
for (int i = 0; i < dt.Columns.Count; i++)
{
data += dt.Columns[i].ColumnName.ToString();
if (i < dt.Columns.Count - 1)
{
data += ",";
}
}
sw.WriteLine(data);
//写出各行数据
for (int i = 0; i < dt.Rows.Count; i++)
{
data = "";
for (int j = 0; j < dt.Columns.Count; j++)
{
string str = dt.Rows[i][j].ToString();
str = str.Replace("\"", "\"\"");//替换英文冒号 英文冒号需要换成两个冒号
if (str.Contains(',') || str.Contains('"')
|| str.Contains('\r') || str.Contains('\n')) //含逗号 冒号 换行符的需要放到引号中
{
str = string.Format("\"{0}\"", str);
}
data += str;
if (j < dt.Columns.Count - 1)
{
data += ",";
}
}
sw.WriteLine(data);
}
sw.Close();
fs.Close();
DialogResult result = MessageBox.Show("CSV文件保存成功！");
}
public static string[][] Read(string fullname)
{
if (!File.Exists(fullname)) return new string[][] { };
var lines = File.ReadAllLines(fullname).Skip(1);
var list=new List<string[]>();
var builder = new StringBuilder();
foreach (var line in lines)
{
builder=new StringBuilder ();
var comma = false;
var array = line.ToCharArray();
var values = new List<string>();
var length = array.Length - 1;
var index = 0;
while (index < length)
{
var item = array[index++];
switch (item)
{
case ',':
if (comma)
{
builder.Append(item);
}
else
{
values.Add(builder.ToString());
builder = new StringBuilder();
}
break;
case '"':
comma = !comma;
break;
default:
builder.Append(item);
break;
}
}
var count = values.Count;
if (count == 0) continue;
list.Add(values.ToArray());
}
return list.ToArray();
}
//public static List<StoreBagConfig> ReadList(string fullname)
//{
// List<StoreBagConfig> result = new List<StoreBagConfig>();
// if (!File.Exists(fullname)) {
// return result;
// }
// var lines = File.ReadAllLines(fullname).Skip(1);
// var list = new List<string[]>();
// int index=0;
// foreach (var line in lines)
// {
// var array = line.Split(',');
// var length = array.Length ;
// if (length == 5)
// {
// int col = Int32.Parse(array[0]);
// int row = Int32.Parse(array[1]);
// int axisPosition = Int32.Parse(array[2]);
// int highPosition = Int32.Parse(array[3]);
// int lowPosition = Int32.Parse(array[4]);
// StoreBagConfig config = new StoreBagConfig();
// config.AxisPostion = axisPosition;
// config.BagColoum = col;
// config.CsvRowIndex = index;
// config.HighPostion = highPosition;
// config.LowPosition = lowPosition;
// config.BagRow = row;
// result.Add(config);
// }
// else
// {
// LogUtil.error(LOGGER,"读取csv，index="+index+",数据格式不匹配！，line="+line);
// }
// index++;
// }
// return result;
//}
}
}