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How to determine if a given TTable has a restricted view Turn on/off line numbers in source code. Switch to Orginial background IDE or DSP color Comment or reply to this aritlce/tip for discussion. Bookmark this article to my favorite article(s). Print this article
Determine if a given TTable has a restricted view 25-Aug-02
Category
DB-General
Language
Delphi 2.x
Views
86
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Publisher:
DSP, Administrator
Reference URL:
DKB
			Author: Tomas Rutkauskas

I am trying to write a function to determine if a given TTable has a restricted 
view. The filtered and master-detail views are easy. Is there a way to determine if 
SetRange / ApplyRange, etc. have been used for a table? This is for Paradox tables.

Answer:

1   TMyTable = class(TTable)
2   public
3     function IsRangeActive: Boolean;
4   end;
5   
6   function TMyTable.IsRangeActive: Boolean;
7   begin
8     Result := BuffersEqual(GetKeyBuffer(kiRangeStart), GetKeyBuffer(kiCurRangeStart),
9       SizeOf(TKeyBuffer) + RecordSize) and BuffersEqual(GetKeyBuffer(kiRangeEnd),
10      GetKeyBuffer(kiCurRangeEnd), SizeOf(TKeyBuffer) + RecordSize);
11  end;


			
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