System.CopyStream(OutStream, InStream [, Integer]) Method

  • Article

Version: Available or changed with runtime version 1.0.

Copies the information that is contained in an InStream to an OutStream.

Syntax

[Ok := ]  System.CopyStream(OutStream: OutStream, InStream: InStream [, BytesToRead: Integer])

Note

This method can be invoked without specifying the data type name.

Parameters

OutStream
 Type: OutStream
The OutStream object to which you will copy the information; the destination stream.

InStream
 Type: InStream
The InStream object from which you want to copy; the source stream.

[Optional] BytesToRead
 Type: Integer

Return Value

[Optional] Ok
 Type: Boolean
true if the operation was successful; otherwise false. If you omit this optional return value and the operation does not execute successfully, a runtime error will occur.

Example

var
    F1: File;
    F2: File;
    InS: InStream;
    OutS: OutStream;
begin
    F1.Open('c:\Test.txt');  
    F1.CreateInStream(InS);  
    F2.Create('c:\CopyTest.txt');  
    F2.CreateOutStream(OutS);  
    CopyStream(OutS,InS);  
    F1.Close();  
    F2.Close();  
end;

System Data Type
Get Started with AL
Developing Extensions