TDANativeDatabaseAccess_Dataset

Overview

The TDANativeDatabaseAccess_Dataset class implements the IDANativeDatabaseAccess interface.

Location

Implements

 

constructor Create

Creates a new instance.

constructor Create(aDADataset: TDAESQLCommand)

Parameters:

  • aDADataset: owner

CanFreeNativeFieldData  protected

Specifies that given field can destroy pointer returned in GetNativeFieldData method

function CanFreeNativeFieldData: Boolean

CanUseNativeFieldData  protected

Specifies that given field can return data in GetNativeFieldData method

function CanUseNativeFieldData(Index: Integer): boolean

Parameters:

  • Index: Required field index

ClearFieldDefs  protected

Clears field definitions

procedure ClearFieldDefs

ControlsDisabled  protected

Indicates whether data-aware controls update their display to reflect changes to the dataset.

function ControlsDisabled: Boolean

Dataset  protected

Returns native object

property Dataset: TDataSet read write

DisableControls  protected

Disables data display in data-aware controls associated with the dataset.

procedure DisableControls

EnableControls  protected

Enables data display in data-aware controls associated with the dataset.

procedure EnableControls

FieldCount  protected

Returns TDataSet of the referred dataset.

function FieldCount: Integer

FindField  protected

Returns an item with the specified name.

function FindField(const FieldName: string): IDANativeField

Parameters:

  • FieldName: name of the searched field

FreeBookmark  protected

Frees the resources allocated for a specified bookmark.

procedure FreeBookmark(Bookmark: TBookmark)

Parameters:

  • Bookmark: bookmark that should be freed

GetActive  protected

Returns TDataSet of the referred dataset.

function GetActive: Boolean

GetBOF  protected

Returns TDataSet of the referred dataset.

function GetBOF: Boolean

GetBookMark  protected

Allocates a bookmark for the active record

function GetBookMark: pointer

GetEOF  protected

Returns TDataSet of the referred dataset.

function GetEOF: Boolean

GetFieldName  protected

Returns the field name assosiated with the field index.

function GetFieldName(Index: Integer): string

Parameters:

  • Index: Index of the field

GetFields  protected

Returns the field on the Index position as IDANativeField.

function GetFields(Index: integer): IDANativeField

Parameters:

  • Index: position.

GetIsEmpty  protected

Returns TDataSet of the referred dataset.

function GetIsEmpty: boolean

GetNativeFieldData  protected

Sets the DataSize to the according field size value, allocates the Data memory and copies the content of the field.

function GetNativeFieldData(Index: Integer; var Buffer: TBytes): Boolean

Parameters:

  • Index: Required field index
  • Buffer:

GetNativeFieldDataType  protected

Returns the field type of the Index field

function GetNativeFieldDataType(Index: Integer): TFieldType

Parameters:

  • Index: Required field

GetNativeFieldValue  protected virtual

Returns the value of the Index field as Variant.

function GetNativeFieldValue(Index: Integer): Variant

Parameters:

  • Index: Required field

GetRecordCount  protected

Returns TDataSet of the referred dataset.

function GetRecordCount: Integer

GetState  protected

Returns TDataSet of the referred dataset.

function GetState: TDatasetState

GotoBookmark  protected

Positions on the record to which a specified bookmark points.

procedure GotoBookmark(Bookmark: TBookmark)

Parameters:

  • Bookmark: record identified by this Bookmark should be active

IsTDatasetCompatible  protected

Returns True.

function IsTDatasetCompatible: Boolean

Locate  protected

Returns TDataSet of the referred dataset.

function Locate(const KeyFields: string; const KeyValues: Variant; Options: TLocateOptions): Boolean

Parameters:

  • KeyFields: The semicolon-separated list of fields.
  • KeyValues: Values specified by the Variant or Variant array.
  • Options: Indicates whether the search is case insensitive and whether partial matches are supported.

Lookup  protected

Returns TDataSet of the referred dataset.

function Lookup(const KeyFields: string; const KeyValues: Variant; const ResultFields: string): Variant

Parameters:

  • KeyFields: the semicolon-separated list of fields
  • KeyValues: Values specified by the Variant or Variant array.
  • ResultFields: The semicolon-separated list of result fields.

Next  protected

Calls TDataSet of the referred dataset.

procedure Next

Prepare  protected

Sets the property Prepared of the referred dataset to AValue.

procedure Prepare(const AValue: Boolean)

Parameters:

  • AValue: state

SetActive  protected virtual

Calls TDataSet of the referred dataset to aValue. If aValue is true, it fills the internal list of IDANativeField proxies.

procedure SetActive(const aValue: Boolean)

Parameters:

  • aValue: state

 

Dataset  protected

Returns native object

property Dataset: TDataSet read write

 

constructor Create

Creates a new instance.

constructor Create(aDADataset: TDAESQLCommand)

Parameters:

  • aDADataset: owner

CanFreeNativeFieldData  protected

Specifies that given field can destroy pointer returned in GetNativeFieldData method

function CanFreeNativeFieldData: Boolean

CanUseNativeFieldData  protected

Specifies that given field can return data in GetNativeFieldData method

function CanUseNativeFieldData(Index: Integer): boolean

Parameters:

  • Index: Required field index

ClearFieldDefs  protected

Clears field definitions

procedure ClearFieldDefs

ControlsDisabled  protected

Indicates whether data-aware controls update their display to reflect changes to the dataset.

function ControlsDisabled: Boolean

DisableControls  protected

Disables data display in data-aware controls associated with the dataset.

procedure DisableControls

EnableControls  protected

Enables data display in data-aware controls associated with the dataset.

procedure EnableControls

FieldCount  protected

Returns TDataSet of the referred dataset.

function FieldCount: Integer

FindField  protected

Returns an item with the specified name.

function FindField(const FieldName: string): IDANativeField

Parameters:

  • FieldName: name of the searched field

FreeBookmark  protected

Frees the resources allocated for a specified bookmark.

procedure FreeBookmark(Bookmark: TBookmark)

Parameters:

  • Bookmark: bookmark that should be freed

GetActive  protected

Returns TDataSet of the referred dataset.

function GetActive: Boolean

GetBOF  protected

Returns TDataSet of the referred dataset.

function GetBOF: Boolean

GetBookMark  protected

Allocates a bookmark for the active record

function GetBookMark: pointer

GetEOF  protected

Returns TDataSet of the referred dataset.

function GetEOF: Boolean

GetFieldName  protected

Returns the field name assosiated with the field index.

function GetFieldName(Index: Integer): string

Parameters:

  • Index: Index of the field

GetFields  protected

Returns the field on the Index position as IDANativeField.

function GetFields(Index: integer): IDANativeField

Parameters:

  • Index: position.

GetIsEmpty  protected

Returns TDataSet of the referred dataset.

function GetIsEmpty: boolean

GetNativeFieldData  protected

Sets the DataSize to the according field size value, allocates the Data memory and copies the content of the field.

function GetNativeFieldData(Index: Integer; var Buffer: TBytes): Boolean

Parameters:

  • Index: Required field index
  • Buffer:

GetNativeFieldDataType  protected

Returns the field type of the Index field

function GetNativeFieldDataType(Index: Integer): TFieldType

Parameters:

  • Index: Required field

GetNativeFieldValue  protected virtual

Returns the value of the Index field as Variant.

function GetNativeFieldValue(Index: Integer): Variant

Parameters:

  • Index: Required field

GetRecordCount  protected

Returns TDataSet of the referred dataset.

function GetRecordCount: Integer

GetState  protected

Returns TDataSet of the referred dataset.

function GetState: TDatasetState

GotoBookmark  protected

Positions on the record to which a specified bookmark points.

procedure GotoBookmark(Bookmark: TBookmark)

Parameters:

  • Bookmark: record identified by this Bookmark should be active

IsTDatasetCompatible  protected

Returns True.

function IsTDatasetCompatible: Boolean

Locate  protected

Returns TDataSet of the referred dataset.

function Locate(const KeyFields: string; const KeyValues: Variant; Options: TLocateOptions): Boolean

Parameters:

  • KeyFields: The semicolon-separated list of fields.
  • KeyValues: Values specified by the Variant or Variant array.
  • Options: Indicates whether the search is case insensitive and whether partial matches are supported.

Lookup  protected

Returns TDataSet of the referred dataset.

function Lookup(const KeyFields: string; const KeyValues: Variant; const ResultFields: string): Variant

Parameters:

  • KeyFields: the semicolon-separated list of fields
  • KeyValues: Values specified by the Variant or Variant array.
  • ResultFields: The semicolon-separated list of result fields.

Next  protected

Calls TDataSet of the referred dataset.

procedure Next

Prepare  protected

Sets the property Prepared of the referred dataset to AValue.

procedure Prepare(const AValue: Boolean)

Parameters:

  • AValue: state

SetActive  protected virtual

Calls TDataSet of the referred dataset to aValue. If aValue is true, it fills the internal list of IDANativeField proxies.

procedure SetActive(const aValue: Boolean)

Parameters:

  • aValue: state