Component: "AdoDb.Stream" instructions

zhaozj2021-02-16  78

Component: "AdoDb.Stream"

Have the following methods:

CANCEL method

How to use

Object.cancel

Description: Cancel the call to the pending asynchronous EXECUTE or OPEN method.

Close method

How to use

Object.close

: Close the right image

COPYTO method

How to use

Object.copyto (Deststream, [Charnumber])

Description: Copy the data of the object, DestStream points to the object to be copied, charnumber is an optional parameter, and the number of bytes must be copied, and is not selected as all replication.

FLUSH method

How to use

Object.flush

Description:

LoadFromfile method

How to use

Object.loadFromfile (filename)

Description: Load FileName The file specified in the object, the parameter filename is the specified username.

Open method

How to use

Object.open (Source, [Mode], [OPTIONS], [UserName], [Password])

Description: Open the object,

Parameter Description: Sourece Alignment, may not be specified

Mode specifies that the open mode is open, can be specified, the optional parameters are as follows:

AdmodeRead = 1

AdmodeReadwrite = 3

AdmodeRecursive = 4194304

Admodesharedenynone = 16

AdmodesharedenyRead = 4

Admodesharednywrite = 8

AdmodeshareExClusive = 12

AdmodeunkNown = 0

AdmodeWrite = 2

Options Specifies the option to open, may not be specified, the optional parameters are as follows:

AdoPenStreamasync = 1

AdoPenStreamFromRecord = 4

AdoPenStreamunSpecified = -1

UserName Specifies the username, not specified.

Password Specifies the password of the username

Read method

The method is as follows:

Object.read (NumBytes)

Description: Read binary content of the specified length.

Parameter Description: Numbytes Specifies the Land to read, not specified, read all.

ReadText method

The method is as follows:

Object.readtext (Numchars)

Description: Read the text of the specified length

Parameter Description: Numchars specified by the Land to read, not specified, read all.

Savetofile method

The method is as follows:

Object.savetofile (FileName, [Options])

Description: Write the contents of the object to the file specified in the filename

Parameter Description: FileName Specifies the file

Options Access options, may not be specified, optional parameters are as follows:

Adsavecreatenotexist = 1

AdsavecreateOverWrite = 2

Seteos method

The method is as follows:

Object.seteos ()

Description:

Skipline method

The method is as follows:

Object.skipline ()

Description:

Write method

The method is as follows:

Object.write (buffer)

Description: Load the specified data into the object.

Parameter Description: Buffer is the content you want to write.

WriteText method

The method is as follows:

Object.write (data, [options])

Description: Load the specified text data into the object.

Parameter Description: DATA is the content you want to write.

Options written in Options, may not be specified, optional parameters are as follows:

AdWriteChar = 0

AdWriteline = 1

Have the following properties:

Charset

EOS returns to whether the data is empty within the object.

LINESEPARATOR specifies a changing format, optional parameters have

ADCR = 13

ADCRLF = -1

ADLF = 10

Mode specifies or returns mode.

Position specifies or returns the current pointer to the image within the image.

SIZE returns the size of the data within the object.

State returns to whether the object state is opened.

Type specified or returned data type, optional parameters are:

ADTYPEBINARY = 1

ADTYPETEXT = 2

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