using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Windows.Forms;
using System.IO;
namespace FileReadAndWrite
{
<summary>
操作CSV存取类
</summary>
public class OutForCVS
{
#region 变量
<summary>
取出配置文件中的分隔符
</summary>
private static string _splitChar = null;
<summary>
取出配置文件中的编码方式
</summary>
private static string _encodeFormat = null;
#endregion
#region 构造方法
<summary>
构造方法获取分隔符、编码方式
</summary> #endregion
#region 写CSV方法
<summary>
写入CSV
</summary>
<param name="hasHeader">列头</param>
<param name="dtOutputCSV">文件内容</param>
public void WriteCSV(bool hasHeader, DataTable dtOutputCSV)
{
Log开始
INGLog.WriteLog(INGLogLevel.Debug, INGConstants.START);
获取写入文件名称以及格式
String strFileName = DateTime.Now.ToString("YYYYMMDDhhmm");
SaveFileDialog savFileDialog = new SaveFileDialog();
savFileDialog.Reset();
savFileDialog.DefaultExt = "csv";
savFileDialog.Filter = "CSV|*.csv";
savFileDialog.ShowDialog();
strFileName = savFileDialog.FileName;
判断文件名
if (string.IsNullOrEmpty(strFileName))
{
信息提示
INGMessage.ShowMessage("M009", "WriteFileName");
}
重载方法调用，写入文件
WriteCSV(hasHeader, dtOutputCSV, strFileName+".csv");
Log结束
INGLog.WriteLog(INGLogLevel.Debug, INGConstants.END);
}
#endregion
#region 写入CSV，附带路径方法
<summary>
写入CSV，附带路径
</summary>
<param name="hasHeader">列头</param>
<param name="dtOutputCSV">文件内容</param>
<param name="strPath">指定文件路径</param>
public static void WriteCSV(bool hasHeader, DataTable dtOutputCSV, string strPath)
{
Log开始
INGLog.WriteLog(INGLogLevel.Debug, INGConstants.START);
DataTable有无判断
if (dtOutputCSV == null)
{
throw new ArgumentNullException("Argument(dtOutputCSV) is null!");
}
StringBuilder初始化
StringBuilder sb = new StringBuilder();
DataTable有无数据判断
if (hasHeader)
{
添加列头
foreach (DataColumn dc in dtOutputCSV.Columns)
{
if (dc.DataType == Type.GetType("System.String"))
{
dc.ColumnName = "'" + dc.ColumnName + "'"; //修改
}
sb.Append(dc.ColumnName).Append(_splitChar);
}
创建新行
sb.Remove(sb.Length - , );
sb.Append(Environment.NewLine);
}
路径为空或者取消保存时
if (strPath == "")
{
return;
}
添加行
foreach (DataRow dr in dtOutputCSV.Rows)
{
foreach (object rowItem in dr.ItemArray)//object rowItem
{
object itemValue = rowItem;
itemValue = "'" + itemValue + "'";
sb.Append(itemValue).Append(_splitChar);
}
创建新行
sb.Remove(sb.Length - , );
sb.Append(Environment.NewLine);
}
using (TextWriter tw = new StreamWriter(strPath, false))
{
tw.Write(sb.ToString());
INGMessage.ShowMessage("M010", "Success");
tw.Flush();
tw.Close();
}
Log结束
INGLog.WriteLog(INGLogLevel.Debug, INGConstants.END);
}
#endregion
#region 读CSV文件方法
/// <summary>
/// 读CSV文件
/// </summary>
/// <param name="hasHeader">列头</param>
/// <returns>返回信息</returns>
public static DataTable ReadCSV(bool hasHeader)
{
// Log开始
//INGLog.WriteLog(INGLogLevel.Debug, INGConstants.START);
String strFileName;
using (OpenFileDialog ofdFileDialog = new OpenFileDialog())
{
ofdFileDialog.Reset();
ofdFileDialog.DefaultExt = "csv";
ofdFileDialog.Filter = "CSV|*.csv";
ofdFileDialog.ShowDialog();
// 文件名取得
strFileName = ofdFileDialog.FileName;
}
// 文件路径取得
String strFilePath = Path.GetFileName(strFileName);
// 文件路径判断
if (string.IsNullOrEmpty(strFilePath))
{
return null;
}
// Log结束
//INGLog.WriteLog(INGLogLevel.Debug, INGConstants.END);
return ReadCSV(hasHeader, strFilePath);
}
#endregion
#region 读指定路径CSV文件方法
<summary>
读指定路径CSV文件
</summary>
<param name="hasHeader">列头</param>
<param name="strPath">指定文件路径</param>
<returns>返回信息</returns>
public static DataTable ReadCSV(bool hasHeader, string strPath)
{
// Log开始
//INGLog.WriteLog(INGLogLevel.Debug, INGConstants.START);
String FileName = Path.GetFileName(strPath);
// 文件路径判断
if (string.IsNullOrEmpty(FileName))
{
return null;
}
DataTable dt = new DataTable(FileName);
// 文本文件分析instance生成
TextFieldParser parser = new TextFieldParser(strPath, Encoding.GetEncoding(_encodeFormat));
// 指定文件形式
parser.TextFieldType = FieldType.Delimited;
// 段落分割
parser.SetDelimiters(_splitChar);
// 设置CSV行计数
int iRowCnt = ;
// 到文件最后边界
while (!parser.EndOfData)
{
// 读入一行
string[] row = parser.ReadFields();
// CSV行判断
if (iRowCnt.Equals())
{
// 判断列头有无
if (hasHeader)
{
int i = ;
// 添加列到行
foreach (string sColumn in row)
{
// DataColumn初始化
DataColumn column = new DataColumn();
column.DataType = Type.GetType("System.String");
string sColumnValue = sColumn;
sColumnValue = sColumnValue.Substring(, sColumnValue.Length - );
column.ColumnName = sColumnValue;
dt.Columns.Add(column);
}
}
}
// 数据
else //修改
{
// 行添加
int rowLength = row.Length;
DataRow dr = dt.NewRow();
for (int j = ; j < rowLength; j++)
{
string columnValue = row.GetValue(j).ToString();
columnValue = columnValue.Substring(, columnValue.Length - );
dr[j] = columnValue;
}
dt.Rows.Add(dr);
}
// CSV行计数
iRowCnt++;
}
// Log结束
INGLog.WriteLog(INGLogLevel.Debug, INGConstants.END);
return dt;
}
#endregion
public void CreateCsv(System.Data.DataTable dt, string strName)
{ 先打印标头
StringBuilder strColu = new StringBuilder();
StringBuilder strValue = new StringBuilder();
int i = ;
try
{
StreamWriter sw = new StreamWriter(new FileStream(strName + ".csv", FileMode.Create), Encoding.GetEncoding("GB2312"));
for (i = ; i <= dt.Columns.Count - ; i++)
{
strColu.Append("\"" + dt.Columns[i].ColumnName + "\"");
strColu.Append(",");
}
strColu.Remove(strColu.Length - , );//移出掉最后一个,字符
sw.WriteLine(strColu);
foreach (DataRow dr in dt.Rows)
{
strValue.Remove(, strValue.Length);//移出
for (i = ; i <= dt.Columns.Count - ; i++)
{
strValue.Append("\"" + dr[i].ToString().Replace("'", "''").Replace(",", "，") + "\"");
strValue.Append(",");
}
strValue.Remove(strValue.Length - , );//移出掉最后一个,字符
sw.WriteLine(strValue);
}
sw.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
} }
}
之前所写，迁移至此
原文链接：http://user.qzone.qq.com/372806800/blog/1345305065