Table of Contents

Class DsvDataReader

Namespace
Cuemon.Data
Assembly
Cuemon.Data.dll

Provides a way of reading a forward-only stream of rows from a DSV (Delimiter Separated Values) based data source. This class cannot be inherited.

public sealed class DsvDataReader : DataReader<string[]>, IDataReader, IDataRecord, IDisposable
Inheritance
Object
DataReader<String[]>
DsvDataReader
Implements
IDataReader
IDataRecord
IDisposable
Inherited Members

Constructors

DsvDataReader(StreamReader, String, Func<String, Object>, Action<DelimitedStringOptions>)

Initializes a new instance of the DsvDataReader class.

public DsvDataReader(StreamReader reader, string header = null, Func<string, object> parser = null, Action<DelimitedStringOptions> setup = null)

Parameters

reader StreamReader

The System.IO.StreamReader object that contains the DSV data.

header String

The header defining the columns of the DSV data. Default is reading the first line of the reader.

parser Func<String, Object>

The function delegate that returns a primitive object whose value is equivalent to the provided System.String value. Default is FromValueType().

setup Action<DelimitedStringOptions>

The FormattingOptions which may be configured.

Exceptions

ArgumentException

header cannot be empty or consist only of white-space characters -or- header does not contain the Delimiter specified in setup.

System.ArgumentNullException

reader is null.

Properties

Delimiter

Gets the delimiter used to separate fields of this instance.

public string Delimiter { get; }

Property Value

String

The delimiter used to separate fields of this instance.

Header

Gets the header that defines the field names of this instance.

public string[] Header { get; }

Property Value

String[]

The header that defines the field names of this instance.

NullRead

Gets the value that indicates that no more rows exists.

protected override string[] NullRead { get; }

Property Value

String[]

The value that indicates that no more rows exists.

Qualifier

Gets the qualifier that surrounds a field.

public string Qualifier { get; }

Property Value

String

The qualifier that surrounds a field.

RowCount

Gets the currently processed row count of this instance.

public override int RowCount { get; protected set; }

Property Value

Int32

The currently processed row count of this instance.

Remarks

This property is incremented when the invoked Read() method returns true.

Methods

OnDisposeManagedResources()

Called when this object is being disposed by either Dispose() or Dispose(Boolean) having disposing set to true and Disposed is false.

protected override void OnDisposeManagedResources()

Read()

Advances this instance to the next line of the DSV data source.

public override bool Read()

Returns

Boolean

true if there are more lines; otherwise, false.

Exceptions

System.ObjectDisposedException

This instance has been disposed.

ReadAsync()

Asynchronously advances this instance to the next line of the DSV data source.

public Task<bool> ReadAsync()

Returns

Task<Boolean>

true if there are more lines; otherwise, false.

Exceptions

System.ObjectDisposedException

This instance has been disposed.

ReadNext(String[])

Advances this instance to the next record.

protected override string[] ReadNext(string[] columns)

Parameters

columns String[]

Returns

String[]

A string[] for as long as there are rows; NullRead when no more rows exists.

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