FastCsvReader

Ecng.IO

Provides fast CSV reading capabilities from various input sources.

构造函数

public FastCsvReader(Stream stream, Encoding encoding, string lineSeparator)

fastCsvReader = FastCsvReader(stream, encoding, lineSeparator)

Initializes a new instance of the FastCsvReader class using a stream, encoding, and line separator.

stream: The input stream to read CSV data from.
encoding: The character encoding to use.
lineSeparator: The string that separates lines.

FastCsvReader

public FastCsvReader(TextReader reader, string lineSeparator, bool leaveOpen)

fastCsvReader = FastCsvReader(reader, lineSeparator, leaveOpen)

Initializes a new instance of the FastCsvReader class using a TextReader and line separator.

reader: The TextReader to read CSV data from.
lineSeparator: The string that separates lines.
leaveOpen: Specifies whether the reader should remain open after the FastCsvReader is disposed.

FastCsvReader

public FastCsvReader(TextReader reader, string lineSeparator)

fastCsvReader = FastCsvReader(reader, lineSeparator)

Initializes a new instance of the FastCsvReader class using a TextReader and line separator.

reader: The TextReader to read CSV data from.
lineSeparator: The string that separates lines.

FastCsvReader

public FastCsvReader(string content, string lineSeparator)

fastCsvReader = FastCsvReader(content, lineSeparator)

Initializes a new instance of the FastCsvReader class using a string content and line separator.

content: The string content to read CSV data from.
lineSeparator: The string that separates lines.

FastCsvReader

public FastCsvReader(Stream stream, Encoding encoding, string lineSeparator, bool leaveOpen)

fastCsvReader = FastCsvReader(stream, encoding, lineSeparator, leaveOpen)

Initializes a new instance of the FastCsvReader class using a stream, encoding, and line separator.

stream: The input stream to read CSV data from.
encoding: The character encoding to use.
lineSeparator: The string that separates lines.
leaveOpen: Specifies whether the stream should remain open after the FastCsvReader is disposed.

属性

ColumnCount

public int ColumnCount { get; }

value = fastCsvReader.ColumnCount

Gets the number of columns in the current CSV line.

ColumnCurr

public int ColumnCurr { get; }

value = fastCsvReader.ColumnCurr

Gets the current column index being processed.

ColumnSeparator

public char ColumnSeparator { get; set; }

value = fastCsvReader.ColumnSeparator
fastCsvReader.ColumnSeparator = value

Gets or sets the character used to separate columns.

CurrentLine

public string CurrentLine { get; }

value = fastCsvReader.CurrentLine

Gets the current CSV line as a string.

Reader

public TextReader Reader { get; }

value = fastCsvReader.Reader

Gets the underlying text reader.

方法

DisposeManaged

protected override void DisposeManaged()

fastCsvReader.DisposeManaged()

Disposes the managed resources. Override this method to add custom clean up of managed resources.

NextLineAsync

public ValueTask<bool> NextLineAsync(CancellationToken cancellationToken)

result = fastCsvReader.NextLineAsync(cancellationToken)

Asynchronously reads the next CSV line from the underlying stream or reader.

cancellationToken: Cancellation token.

返回值: true if a new line was successfully read; otherwise, false.

ReadBool

public bool ReadBool()

result = fastCsvReader.ReadBool()

Reads the next column as a boolean value.

返回值: The boolean value read from the column.

ReadDateTime

public DateTime ReadDateTime(string format)

result = fastCsvReader.ReadDateTime(format)

Reads the next column as a DateTime value using the specified format.

format: The date and time format string.

返回值: The DateTime value read from the column.

ReadDecimal

public decimal ReadDecimal()

result = fastCsvReader.ReadDecimal()

Reads the next column as a decimal value.

返回值: The decimal value read from the column.

ReadDouble

public double ReadDouble()

result = fastCsvReader.ReadDouble()

Reads the next column as a double value.

返回值: The double value read from the column.

ReadEnum``1

public T ReadEnum<T>()

result = fastCsvReader.ReadEnum()

Reads the next column as an enum value of type .

返回值: The enum value read from the column.

ReadInt

public int ReadInt()

result = fastCsvReader.ReadInt()

Reads the next column as an integer value.

返回值: The integer value read from the column.

ReadLong

public long ReadLong()

result = fastCsvReader.ReadLong()

Reads the next column as a long value.

返回值: The long value read from the column.

ReadNullableBool

public bool? ReadNullableBool()

result = fastCsvReader.ReadNullableBool()

Reads the next column as a nullable boolean value.

返回值: A nullable boolean value read from the column, or null if the column is empty.

ReadNullableDateTime

public DateTime? ReadNullableDateTime(string format)

result = fastCsvReader.ReadNullableDateTime(format)

Reads the next column as a nullable DateTime value using the specified format.

format: The date and time format string.

返回值: A nullable DateTime value read from the column, or null if the column is empty.

ReadNullableDecimal

public decimal? ReadNullableDecimal()

result = fastCsvReader.ReadNullableDecimal()

Reads the next column as a nullable decimal value.

返回值: A nullable decimal value read from the column, or null if the column is empty.

ReadNullableDouble

public double? ReadNullableDouble()

result = fastCsvReader.ReadNullableDouble()

Reads the next column as a nullable double value.

返回值: A nullable double value read from the column, or null if the column is empty.

ReadNullableEnum``1

public T? ReadNullableEnum<T>()

result = fastCsvReader.ReadNullableEnum()

Reads the next column as a nullable enum value of type .

返回值: A nullable enum value read from the column, or null if the column is empty.

ReadNullableInt

public int? ReadNullableInt()

result = fastCsvReader.ReadNullableInt()

Reads the next column as a nullable integer value.

返回值: A nullable integer value read from the column, or null if the column is empty.

ReadNullableLong

public long? ReadNullableLong()

result = fastCsvReader.ReadNullableLong()

Reads the next column as a nullable long value.

返回值: A nullable long value read from the column, or null if the column is empty.

ReadNullableTimeSpan

public TimeSpan? ReadNullableTimeSpan(string format)

result = fastCsvReader.ReadNullableTimeSpan(format)

Reads the next column as a nullable TimeSpan value using the specified format.

format: The time span format string.

返回值: A nullable TimeSpan value read from the column, or null if the column is empty.

ReadString

public string ReadString()

result = fastCsvReader.ReadString()

Reads the next column as a string.

返回值: The string read from the column, or null if the column is empty.

ReadTimeSpan

public TimeSpan ReadTimeSpan(string format)

result = fastCsvReader.ReadTimeSpan(format)

Reads the next column as a TimeSpan value using the specified format.

format: The time span format string.

返回值: The TimeSpan value read from the column.

Skip

public void Skip(int count)

fastCsvReader.Skip(count)

Skips the specified number of columns.

count: The number of columns to skip. Defaults to 1.