C# Class Azavea.Open.DAO.CSV.CsvDataReader

A datareader that reads CSV files.
Inheritance: UnqueryableDataReader
Afficher le fichier Open project: azavea/net-dao-csv Class Usage Examples

Méthodes publiques

Méthode Description
Close ( ) : void

Closes the T:System.Data.IDataReader Object.
CsvDataReader ( CsvDaLayer layer, ClassMapping mapping, DaoCriteria criteria ) : System

Create the data reader.
GetBytes ( int i, long fieldOffset, byte buffer, int bufferoffset, int length ) : long

Reads a stream of bytes from the specified column offset into the buffer as an array, starting at the given buffer offset.
GetChars ( int i, long fieldoffset, char buffer, int bufferoffset, int length ) : long

Reads a stream of characters from the specified column offset into the buffer as an array, starting at the given buffer offset.
GetData ( int i ) : IDataReader

Returns an T:System.Data.IDataReader for the specified column ordinal.
GetFieldType ( int i ) : Type

Gets the T:System.Type information corresponding to the type of T:System.Object that would be returned from M:System.Data.IDataRecord.GetValue(System.Int32).
GetGuid ( int i ) : System.Guid

Returns the GUID value of the specified field.
GetName ( int i ) : string

Gets the name for the field to find.
GetSchemaTable ( ) : DataTable

Returns a T:System.Data.DataTable that describes the column metadata of the T:System.Data.IDataReader.
GetValues ( object values ) : int

Gets all the attribute fields in the collection for the current record.
NextResult ( ) : bool

Advances the data reader to the next result, when reading the results of batch SQL statements.

Méthodes protégées

Méthode Description
GetColumnIndex ( string colName ) : int

Helper so the data access layer can be efficient in reading/rewriting CSVs.
ReadRawRow ( ) : IList

This reads the row from the CSV. It basically just tokenizes it, it does not verify that there are any particular number of values or anything else.

Private Methods

Méthode Description
GetConfig ( CsvDaLayer layer, ClassMapping mapping ) : DataReaderConfig
ReadRawCsvRow ( TextReader reader ) : IList

Method Details

Close() public méthode

Closes the T:System.Data.IDataReader Object.
public Close ( ) : void
Résultat void

CsvDataReader() public méthode

Create the data reader.
public CsvDataReader ( CsvDaLayer layer, ClassMapping mapping, DaoCriteria criteria ) : System
layer CsvDaLayer Data access layer that will give us the TextReader we need.
mapping ClassMapping ClassMapping for the type we're returning.
criteria Azavea.Open.DAO.Criteria.DaoCriteria Since there is no way to filter before we read the file, /// the reader checks each row read to see if it matches the /// criteria, if not, it is skipped.
Résultat System

GetBytes() public méthode

Reads a stream of bytes from the specified column offset into the buffer as an array, starting at the given buffer offset.
The index passed was outside the range of 0 through .
public GetBytes ( int i, long fieldOffset, byte buffer, int bufferoffset, int length ) : long
i int The zero-based column ordinal.
fieldOffset long The index within the field from which to start the read operation.
buffer byte The buffer into which to read the stream of bytes.
bufferoffset int The index for to start the read operation.
length int The number of bytes to read.
Résultat long

GetChars() public méthode

Reads a stream of characters from the specified column offset into the buffer as an array, starting at the given buffer offset.
The index passed was outside the range of 0 through .
public GetChars ( int i, long fieldoffset, char buffer, int bufferoffset, int length ) : long
i int The zero-based column ordinal.
fieldoffset long The index within the row from which to start the read operation.
buffer char The buffer into which to read the stream of bytes.
bufferoffset int The index for to start the read operation.
length int The number of bytes to read.
Résultat long

GetColumnIndex() protected méthode

Helper so the data access layer can be efficient in reading/rewriting CSVs.
protected GetColumnIndex ( string colName ) : int
colName string
Résultat int

GetData() public méthode

Returns an T:System.Data.IDataReader for the specified column ordinal.
The index passed was outside the range of 0 through .
public GetData ( int i ) : IDataReader
i int The index of the field to find.
Résultat IDataReader

GetFieldType() public méthode

Gets the T:System.Type information corresponding to the type of T:System.Object that would be returned from M:System.Data.IDataRecord.GetValue(System.Int32).
The index passed was outside the range of 0 through .
public GetFieldType ( int i ) : Type
i int The index of the field to find.
Résultat System.Type

GetGuid() public méthode

Returns the GUID value of the specified field.
The index passed was outside the range of 0 through .
public GetGuid ( int i ) : System.Guid
i int The index of the field to find.
Résultat System.Guid

GetName() public méthode

Gets the name for the field to find.
The index passed was outside the range of 0 through .
public GetName ( int i ) : string
i int The index of the field to find.
Résultat string

GetSchemaTable() public méthode

Returns a T:System.Data.DataTable that describes the column metadata of the T:System.Data.IDataReader.
The is closed.
public GetSchemaTable ( ) : DataTable
Résultat System.Data.DataTable

GetValues() public méthode

Gets all the attribute fields in the collection for the current record.
public GetValues ( object values ) : int
values object An array of to copy the attribute fields into.
Résultat int

NextResult() public méthode

Advances the data reader to the next result, when reading the results of batch SQL statements.
public NextResult ( ) : bool
Résultat bool

ReadRawRow() protected méthode

This reads the row from the CSV. It basically just tokenizes it, it does not verify that there are any particular number of values or anything else.
protected ReadRawRow ( ) : IList
Résultat IList