| Description |
The SeekEoln procedure skips past white space characters in the current record in an open text file given by FileHandle.
The file must have been assigned with AssignFile and opened with Reset.
If the end of line (Eoln) of the end of file (Eof) is thereby reached, the return value is True.
This function is normally used when reading unknown numbers of fields in a record in a file.
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| Notes |
SeekEoln is very similar to SeekEof - the only difference is that SeekEof only returns true when Eof is reached; SeekEoln also returns true when the line end is reached after skipping the white spaces.
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| Related commands |
| Eof |
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Returns true if a file opened with Reset is at the end |
| Eoln |
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Returns true if the current text file is pointing at a line end |
| File |
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Defines a typed or untyped file |
| FilePos |
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Gives the file position in a binary or text file |
| Seek |
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Move the pointer in a binary file to a new record position |
| SeekEof |
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Skip to the end of the current line or file |
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| Example code : Reading all fields in a record in a text file |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
// The System unit does not need to be defined
SysUtils,
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
var
myFile : TextFile;
number : Integer;
begin
// Try to open the Test.txt file for writing to
AssignFile(myFile, 'Test.txt');
ReWrite(myFile);
// Write numbers in a string
WriteLn(myFile, '1 2 3 4 '); // White space at the end
// Write numbers as separate parameters
WriteLn(myFile, 5, ' ', 6, ' ', 7, ' '); // Results in '5 6 7 ' text
// Close the file
CloseFile(myFile);
// Reopen the file for reading
Reset(myFile);
// Display the file contents
while not SeekEof(myFile) do
begin
// Read numbers one at a time
ShowMessage('Start of a new line');
while not SeekEoln(myFile) do
begin
Read(myFile, number);
ShowMessage(IntToStr(number));
end;
// Now move to the next line
ReadLn(myFile);
end;
// Close the file for the last time
CloseFile(myFile);
end;
end.
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| Hide full unit code |
Start of a new line
1
2
3
4
Start of a new line
5
6
7
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