Editar

Compartir a través de

BigText.Read(InStream) Method

  • Artículo

Version: Available or changed with runtime version 1.0.

Streams a BigText object that is stored as a BLOB in a table to a BigText variable.

Syntax

[Ok := ]  BigText.Read(InStream: InStream)

Parameters

BigText
 Type: BigText
An instance of the BigText data type.

InStream
 Type: InStream
The InStream object type that you use to stream a BLOB to a BigText variable.

Return Value

[Optional] Ok
 Type: Boolean
true if the read transaction was successful, otherwise false.

Remarks

To delete the content in a BigText variable, use the Clear Method.

Clear(BigText)

Example

This example shows how to stream a BigText that is stored as a BLOB in a table to a BigText variable.

var
    Bstr: BigText;
    Istream: InStream;
    EmployeeRec: Record Employee;
begin
    EmployeeRec.Find('-');  
    EmployeeRec.CalcFields(Picture);  
    EmployeeRec.Picture.CreateInStream(Istream);  
    Bstr.Read(Istream);  
end;

Use the CalcFields Method (Record) to calculate the BlobField. A BlobField is a binary large object (maximum size 2 GB) and must be calculated if you want to use it in AL or display it in the application.

BigText Data Type
Get Started with AL
Developing Extensions