C# Класс Azavea.Open.DAO.Util.CachingDataReader

A base class to save copying a whole lot of common code for different IDataReader implementations.

Наследование: IDataReader

Защищенные свойства (Protected)

Свойство	Тип	Описание
_config	DataReaderConfig
_indexesByName	int>.IDictionary
_log	log4net.ILog
_namesByIndex	string[]
_numCols	int
_valsByIndex	object[]

Открытые методы

Метод	Описание
Close ( ) : void	Closes the T:System.Data.IDataReader Object.
Dispose ( ) : void	Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
GetBoolean ( int i ) : bool	Gets the value of the specified column as a Boolean.
GetByte ( int i ) : byte	Gets the 8-bit unsigned integer value of the specified column.
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.
GetChar ( int i ) : char	Gets the character value of the specified column.
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.
GetDataTypeName ( int i ) : string	Gets the data type information for the specified field.
GetDateTime ( int i ) : System.DateTime	Gets the date and time data value of the specified field.
GetDecimal ( int i ) : decimal	Gets the fixed-position numeric value of the specified field.
GetDouble ( int i ) : double	Gets the double-precision floating point number of the specified field.
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).
GetFloat ( int i ) : float	Gets the single-precision floating point number of the specified field.
GetGuid ( int i ) : System.Guid	Returns the GUID value of the specified field.
GetInt16 ( int i ) : short	Gets the 16-bit signed integer value of the specified field.
GetInt32 ( int i ) : int	Gets the 32-bit signed integer value of the specified field.
GetInt64 ( int i ) : long	Gets the 64-bit signed integer value of the specified field.
GetName ( int i ) : string	Gets the name for the field to find.
GetOrdinal ( string name ) : int	Return the index of the named field.
GetSchemaTable ( ) : DataTable	Returns a T:System.Data.DataTable that describes the column metadata of the T:System.Data.IDataReader.
GetString ( int i ) : string	Gets the string value of the specified field.
GetValue ( int i ) : object	Return the value of the specified field.
GetValues ( object values ) : int	Gets all the attribute fields in the collection for the current record.
IsDBNull ( int i ) : bool	Return whether the specified field is set to null.
NextResult ( ) : bool	Advances the data reader to the next result, when reading the results of batch SQL statements.
Read ( ) : bool	Advances the T:System.Data.IDataReader to the next record.

Защищенные методы

Метод	Описание
CachingDataReader ( DataReaderConfig config ) : System	Create the data reader.
ClearVals ( ) : void	Resets the values in _valsByIndex.
FetchNextRow ( ) : bool	Moves the cursor (or whatever the implementation equivilent is) to the next row if there is one.
GetCachedValue ( int i ) : object	Will only ever look up the value once.
GetDataObject ( int i ) : object	This method gets the actual data value from the actual data source.

Приватные методы

Метод	Описание
this ( int i ) : objectIDataRecord.System	Gets the column located at the specified index.
this ( string name ) : objectIDataRecord.System	Gets the column with the specified name.

Описание методов

CachingDataReader() защищенный Метод

Create the data reader.

protected CachingDataReader ( DataReaderConfig config ) : System
config	DataReaderConfig	The column indexes in the data, keyed by column name. This may include /// columns not in the mapping.
Результат	System

ClearVals() защищенный Метод

Resets the values in _valsByIndex.

protected ClearVals ( ) : void
Результат	void

Close() публичный абстрактный Метод

Closes the T:System.Data.IDataReader Object.

public abstract Close ( ) : void
Результат	void

Dispose() публичный Метод

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

public Dispose ( ) : void
Результат	void

FetchNextRow() защищенный абстрактный Метод

Moves the cursor (or whatever the implementation equivilent is) to the next row if there is one.

protected abstract FetchNextRow ( ) : bool
Результат	bool

GetBoolean() публичный Метод

Gets the value of the specified column as a Boolean.

The index passed was outside the range of 0 through .

public GetBoolean ( int i ) : bool
i	int	The zero-based column ordinal.
Результат	bool

GetByte() публичный Метод

Gets the 8-bit unsigned integer value of the specified column.

The index passed was outside the range of 0 through .

public GetByte ( int i ) : byte
i	int	The zero-based column ordinal.
Результат	byte

GetBytes() публичный абстрактный Метод

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 abstract 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.
Результат	long

GetCachedValue() защищенный Метод

Will only ever look up the value once.

protected GetCachedValue ( int i ) : object
i	int	0-based column index.
Результат	object

GetChar() публичный Метод

Gets the character value of the specified column.

The index passed was outside the range of 0 through .

public GetChar ( int i ) : char
i	int	The zero-based column ordinal.
Результат	char

GetChars() публичный абстрактный Метод

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 abstract 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.
Результат	long

GetData() публичный абстрактный Метод

Returns an T:System.Data.IDataReader for the specified column ordinal.

The index passed was outside the range of 0 through .

public abstract GetData ( int i ) : IDataReader
i	int	The index of the field to find.
Результат	IDataReader

GetDataObject() защищенный абстрактный Метод

This method gets the actual data value from the actual data source.

protected abstract GetDataObject ( int i ) : object
i	int	Column number to get, zero-based.
Результат	object

GetDataTypeName() публичный Метод

Gets the data type information for the specified field.

The index passed was outside the range of 0 through .

public GetDataTypeName ( int i ) : string
i	int	The index of the field to find.
Результат	string

GetDateTime() публичный Метод

Gets the date and time data value of the specified field.

The index passed was outside the range of 0 through .

public GetDateTime ( int i ) : System.DateTime
i	int	The index of the field to find.
Результат	System.DateTime

GetDecimal() публичный Метод

Gets the fixed-position numeric value of the specified field.

The index passed was outside the range of 0 through .

public GetDecimal ( int i ) : decimal
i	int	The index of the field to find.
Результат	decimal

GetDouble() публичный Метод

Gets the double-precision floating point number of the specified field.

The index passed was outside the range of 0 through .

public GetDouble ( int i ) : double
i	int	The index of the field to find.
Результат	double

GetFieldType() публичный абстрактный Метод

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 abstract GetFieldType ( int i ) : Type
i	int	The index of the field to find.
Результат	System.Type

GetFloat() публичный Метод

Gets the single-precision floating point number of the specified field.

The index passed was outside the range of 0 through .

public GetFloat ( int i ) : float
i	int	The index of the field to find.
Результат	float

GetGuid() публичный абстрактный Метод

Returns the GUID value of the specified field.

The index passed was outside the range of 0 through .

public abstract GetGuid ( int i ) : System.Guid
i	int	The index of the field to find.
Результат	System.Guid

GetInt16() публичный Метод

Gets the 16-bit signed integer value of the specified field.

The index passed was outside the range of 0 through .

public GetInt16 ( int i ) : short
i	int	The index of the field to find.
Результат	short

GetInt32() публичный Метод

Gets the 32-bit signed integer value of the specified field.

The index passed was outside the range of 0 through .

public GetInt32 ( int i ) : int
i	int	The index of the field to find.
Результат	int

GetInt64() публичный Метод

Gets the 64-bit signed integer value of the specified field.

The index passed was outside the range of 0 through .

public GetInt64 ( int i ) : long
i	int	The index of the field to find.
Результат	long

GetName() публичный абстрактный Метод

Gets the name for the field to find.

The index passed was outside the range of 0 through .

public abstract GetName ( int i ) : string
i	int	The index of the field to find.
Результат	string

GetOrdinal() публичный Метод

Return the index of the named field.

public GetOrdinal ( string name ) : int
name	string	The name of the field to find.
Результат	int

GetSchemaTable() публичный абстрактный Метод

Returns a T:System.Data.DataTable that describes the column metadata of the T:System.Data.IDataReader.

The is closed.

public abstract GetSchemaTable ( ) : DataTable
Результат	System.Data.DataTable

GetString() публичный Метод

Gets the string value of the specified field.

The index passed was outside the range of 0 through .

public GetString ( int i ) : string
i	int	The index of the field to find.
Результат	string

GetValue() публичный Метод

Return the value of the specified field.

The index passed was outside the range of 0 through .

public GetValue ( int i ) : object
i	int	The index of the field to find.
Результат	object

GetValues() публичный абстрактный Метод

Gets all the attribute fields in the collection for the current record.

public abstract GetValues ( object values ) : int
values	object	An array of to copy the attribute fields into.
Результат	int

IsDBNull() публичный Метод

Return whether the specified field is set to null.

The index passed was outside the range of 0 through .

public IsDBNull ( int i ) : bool
i	int	The index of the field to find.
Результат	bool

NextResult() публичный абстрактный Метод

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

public abstract NextResult ( ) : bool
Результат	bool

Read() публичный Метод

Advances the T:System.Data.IDataReader to the next record.

public Read ( ) : bool
Результат	bool

Описание свойств

_config защищенное свойство

The config object passed to the constructor. It is available in case the child class needs more data off of it.

protected DataReaderConfig _config
Результат	DataReaderConfig

_indexesByName защищенное свойство

The column indexes, keyed by the column name.

protected IDictionary _indexesByName
Результат	int>.IDictionary

_log защищенное статическое свойство

Logger that may be used by this class or its children.

protected static ILog,log4net _log
Результат	log4net.ILog

_namesByIndex защищенное свойство

The column names, in order from the data source.

protected string[] _namesByIndex
Результат	string[]

_numCols защищенное свойство

The number of columns that the data reader can read.

protected int _numCols
Результат	int

_valsByIndex защищенное свойство

The values for this row, in column order.

protected object[] _valsByIndex
Результат	object[]