Example #1
0
        /// <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="dataHandler">通知事件参数, 每次通返回自上次通知以来写入的行数. </param>
        /// <param name="cancelToken">取消操作的token</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>
        /// <param name="writeBufferLength">写入 IO 缓存,默认为 4M.</param>
        public CsvWriteHelper(Stream stream, Encoding dataEncoding, CsvFlag flag, Action <CsvWriteProgressInfo> dataHandler
                              , CancellationToken cancelToken, int writeProgressSize = 1000, int writeBufferLength = 40960)
        {
            if (stream == null)
            {
                throw new ArgumentNullException(nameof(stream));
            }

            if (dataEncoding == null)
            {
                throw new ArgumentNullException(nameof(dataEncoding));
            }

            if (flag == null)
            {
                throw new ArgumentNullException(nameof(flag));
            }

            if (writeProgressSize <= 0)
            {
                throw new ArgumentException("The property 'writeProgressSize' must be greater than 0");
            }

            if (writeBufferLength <= 0)
            {
                throw new ArgumentException("The property 'writeBufferLength' must be greater than 0");
            }

            columnCount       = 0;
            TotalRowCount     = 0L;
            DataEncoding      = dataEncoding;
            Flag              = flag;
            CancelToken       = cancelToken;
            this.dataHandler  = dataHandler;
            WriteProgressSize = writeProgressSize;
            WriteBufferLength = writeBufferLength;
            csvStream         = new StreamWriter(stream, DataEncoding, WriteBufferLength);
        }
Example #2
0
        /// <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="cancelToken">取消用token</param>
        /// <param name="firstRowIsHead">是否将第一行数据做为标题行</param>
        /// <param name="readBufferLength">流读取缓冲大小, 默认为 40960 字节.</param>
        public CsvReadHelper(Stream stream, Encoding dataEncoding, CsvFlag flag, CancellationToken cancelToken, bool firstRowIsHead = true, int readBufferLength = 40960)
        {
            if (stream == null)
            {
                throw new ArgumentNullException(nameof(stream));
            }

            if (dataEncoding == null)
            {
                throw new ArgumentNullException(nameof(dataEncoding));
            }

            if (flag == null)
            {
                throw new ArgumentNullException(nameof(flag));
            }

            DataEncoding          = dataEncoding;
            Flag                  = flag;
            CancelToken           = cancelToken;
            FirstRowIsHead        = firstRowIsHead;
            this.readBufferLength = readBufferLength;
            csvStream             = new StreamReader(stream, DataEncoding, false, this.readBufferLength);
        }
Example #3
0
 /// <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>
 /// <param name="writeBufferLength">写入 IO 缓存,默认为 4M.</param>
 public CsvWriteHelper(string csvFileName, CsvFlag flag, Action <CsvWriteProgressInfo> dataHandler = null
                       , int writeProgressSize = 1000, int writeBufferLength = 40960)
     : this(csvFileName, Encoding.UTF8, flag, dataHandler, CancellationToken.None, writeProgressSize, writeBufferLength)
 {
 }
Example #4
0
 /// <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. </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>
 /// <param name="writeBufferLength">写入 IO 缓存,默认为 4M.</param>
 public CsvWriteHelper(string csvFileName, Encoding dataEncoding, CsvFlag flag, Action <CsvWriteProgressInfo> dataHandler
                       , CancellationToken cancelToken, int writeProgressSize = 1000, int writeBufferLength = 40960)
     : this(File.Open(csvFileName, FileMode.Create), dataEncoding, flag, dataHandler, cancelToken, writeProgressSize, writeBufferLength)
 {
 }
Example #5
0
 /// <summary>
 /// 使用 Encoding.UTF8 编码初始化写入流
 /// </summary>
 /// <param name="stream">要写入的流</param>
 /// <param name="flag">csv 字段分隔符与限定符</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. </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>
 /// <param name="writeBufferLength">写入 IO 缓存,默认为 4M.</param>
 public CsvWriteHelper(Stream stream, CsvFlag flag, Action <CsvWriteProgressInfo> dataHandler
                       , int writeProgressSize = 1000, int writeBufferLength = 40960)
     : this(stream, Encoding.UTF8, flag, dataHandler, CancellationToken.None, writeProgressSize, writeBufferLength)
 {
 }
Example #6
0
 /// <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="readBufferLength">流读取缓冲大小, 默认为 40960 字节.</param>
 public CsvReadHelper(string csvFileName, CsvFlag flag, bool firstRowIsHead = true, int readBufferLength = 40960)
     : this(csvFileName, Encoding.UTF8, flag, CancellationToken.None, firstRowIsHead, readBufferLength)
 {
 }
Example #7
0
 /// <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="cancelToken">取消用token</param>
 /// <param name="firstRowIsHead">是否将第一行数据做为标题行</param>
 /// <param name="readBufferLength">流读取缓冲大小, 默认为 40960 字节.</param>
 public CsvReadHelper(string csvFileName, Encoding dataEncoding, CsvFlag flag, CancellationToken cancelToken, bool firstRowIsHead = true, int readBufferLength = 40960)
     : this(File.Open(csvFileName, FileMode.Open), dataEncoding, flag, cancelToken, firstRowIsHead, readBufferLength)
 {
 }