InStream.READTEXT Function

Artikkeli
06/05/2016

Reads text from an InStream object.

Syntax

  
[Read := ] InStream.ReadText(Text[, Length])

Parameters

Text
Type: Text

The variable that receives the characters that were read.

Length
Type: Integer

The number of characters to be read. If you do not specify this parameter, the maximum length of the string is used.

Property Value/Return Value

Type: Integer

The number of characters that were read.

Remarks

READTEXT reads the specified number of bytes, the maximum length of the string, or until the end of the line.

Data is read in text format.

If you do not use the optional return value and the data being read is less than the length requested to be read, an error message is displayed.

If you use the return value, you must verify the validity of the data that has been read.

Example

This example shows how to use the InStream.READTEXT function. This example requires that you create the following variables.

Variable name	DataType
FileTest	File
StreamInTest	InStream
Int	Integer
Txt	Text

FileTest.OPEN('c:\XMLDocs\NewTest.txt');  
FileTest.CREATEINSTREAM(StreamInTest);  
// Starting a loop  
WHILE NOT (StreamInTest.EOS) DO BEGIN  
  Int := StreamInTest.READTEXT(Txt,100);  
  MESSAGE(Txt + '\Size: ' + FORMAT(Int));  
END;  
FileTest.CLOSE();

Jaa