/// <summary>
/// 初始化读取流
/// </summary>
/// <param name="stream">要读取的流</param>
/// <param name="dataEncoding">字符编码</param>
/// <param name="flag">csv 字段分隔符与限定符</param>
/// <param name="firstRowIsHead">是否将第一行数据做为标题行</param>
/// <param name="readStreamBufferLength">流读取缓冲大小, 默认为 40960 字节.</param>
public CsvReadHelper(Stream stream, Encoding dataEncoding, CsvFlag flag, bool firstRowIsHead = true, int readStreamBufferLength = 40960)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (dataEncoding == null)
{
throw new ArgumentNullException("dataEncoding");
}
if (flag == null)
{
throw new ArgumentNullException("flag");
}
this.CanRead = true;
this.ColumnCount = 0;
this.TotalRowCount = 0L;
this.DataEncoding = dataEncoding;
this.Flag = flag;
this.FirstRowIsHead = firstRowIsHead;
this.ReadStreamBufferLength = readStreamBufferLength;
this.CsvStream = new StreamReader(stream, this.DataEncoding, false, this.ReadStreamBufferLength);
}
/// <summary>
/// 初始化写入流
/// </summary>
/// <param name="stream">要写入的流</param>
/// <param name="dataEncoding">字符编码</param>
/// <param name="flag">csv 字段分隔符与限定符</param>
/// <param name="cancelToken">取消操作的token</param>
/// <param name="progress">通知事件参数, 每次通返回自上次通知以来写入的行数. 默认为 null, 表示不通知.</param>
/// <param name="writeProgressSize">当写入多少条数据时应触发进度通知事件, 默认为 1000, 此值应大于 0.</param>
public CsvWriteHelper(Stream stream, Encoding dataEncoding, CsvFlag flag
, CancellationToken cancelToken, IProgress <CsvWriteProgressInfo> progress = null, int writeProgressSize = 1000)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (dataEncoding == null)
{
throw new ArgumentNullException("dataEncoding");
}
if (flag == null)
{
throw new ArgumentNullException("flag");
}
if (progress != null)
{
if (writeProgressSize <= 0)
{
throw new ArgumentException("The property 'writeProgressSize' must be greater than 0");
}
}
this.ColumnCount = 0;
this.TotalRowCount = 0L;
this.DataEncoding = dataEncoding;
this.Flag = flag;
this.CancelToken = cancelToken;
this.Progress = progress;
this.WriteProgressSize = writeProgressSize;
this.CsvStream = new StreamWriter(stream, this.DataEncoding);
}
/// <summary>
/// 使用 Encoding.UTF8 编码初始化读取文件
/// </summary>
/// <param name="csvFileName">要读取的文件路径及名称</param>
/// <param name="flag">csv 字段分隔符与限定符</param>
/// <param name="firstRowIsHead">是否将第一行数据做为标题行</param>
/// <param name="readStreamBufferLength">流读取缓冲大小, 默认为 40960 字节.</param>
public CsvReadHelper(string csvFileName, CsvFlag flag, bool firstRowIsHead = true, int readStreamBufferLength = 40960)
: this(csvFileName, Encoding.UTF8, flag, firstRowIsHead, readStreamBufferLength)
{
}
/// <summary>
/// 初始化读取文件
/// </summary>
/// <param name="csvFileName">要读取的文件路径及名称</param>
/// <param name="dataEncoding">字符编码</param>
/// <param name="flag">csv 字段分隔符与限定符</param>
/// <param name="firstRowIsHead">是否将第一行数据做为标题行</param>
/// <param name="readStreamBufferLength">流读取缓冲大小, 默认为 40960 字节.</param>
public CsvReadHelper(string csvFileName, Encoding dataEncoding, CsvFlag flag, bool firstRowIsHead = true, int readStreamBufferLength = 40960)
: this(File.Open(csvFileName, FileMode.Open), dataEncoding, flag, firstRowIsHead, readStreamBufferLength)
{
}
/// <summary>
/// 使用 Encoding.UTF8 编码初始化写入文件
/// </summary>
/// <param name="csvFileName">csv 文件路径及名称</param>
/// <param name="flag">csv 字段分隔符与限定符</param>
/// <param name="cancelToken">取消操作的token</param>
/// <param name="progress">通知事件参数, 每次通返回自上次通知以来写入的行数. 默认为 null, 表示不通知.</param>
/// <param name="writeProgressSize">当写入多少条数据时应触发进度通知事件, 默认为 1000, 此值应大于 0.</param>
public CsvWriteHelper(string csvFileName, CsvFlag flag, CancellationToken cancelToken, IProgress <CsvWriteProgressInfo> progress = null, int writeProgressSize = 1000)
: this(csvFileName, Encoding.UTF8, flag, cancelToken, progress, writeProgressSize)
{
}
/// <summary>
/// 初始化写入文件
/// </summary>
/// <param name="csvFileName">csv 文件路径及名称</param>
/// <param name="dataEncoding">字符编码</param>
/// <param name="flag">csv 字段分隔符与限定符</param>
/// <param name="cancelToken">取消操作的token</param>
/// <param name="progress">通知事件参数, 每次通返回自上次通知以来写入的行数. 默认为 null, 表示不通知.</param>
/// <param name="writeProgressSize">当写入多少条数据时应触发进度通知事件, 默认为 1000, 此值应大于 0.</param>
public CsvWriteHelper(string csvFileName, Encoding dataEncoding, CsvFlag flag
, CancellationToken cancelToken, IProgress <CsvWriteProgressInfo> progress = null, int writeProgressSize = 1000)
: this(File.Open(csvFileName, FileMode.Create), dataEncoding, flag, cancelToken, progress, writeProgressSize)
{
}