Mega Code Archive
Aranan alan, tabloda var mi
<![CDATA[
Alan, belirtilen tabloda varsa fonksiyondan TRUE degeri döner.
Function IsField(DatabaseName, TableName, FieldName: String): Boolean;
Var
Query : TQuery;
T : TTable;
i : Integer;
UpperFN : String;
TestFN : String;
Begin
Result := False;
UpperFN := UpperCase(FieldName);
If Not IsTable(DatabaseName, TableName) Then Exit;
Query := TQuery.Create(nil);
T := TTable.Create(nil);
Try
Try
Query.DatabaseName := DatabaseName;
Query.Sql.Clear;
Query.Sql.Add('Select ');
Query.Sql.Add('a.'+FieldName+' XYZ');
Query.Sql.Add('From');
If (Pos('.DB', UpperCase(TableName)) > 0) Or
(Pos('.DBF',UpperCase(TableName)) > 0) Then
Begin
Query.Sql.Add('"'+TableName+'" a');
End
Else
Begin
Query.Sql.Add(TableName+' a');
End;
Query.Active := True;
Result := True;
Except
Try
T.Active := False;
T.DatabaseName := DatabaseName;
T.TableName := TableName;
T.Active := True;
If T.FieldDefs.IndexOf(FieldName) > -1 Then
Begin
Result := True;
End
Else
Begin
For i := 0 To T.FieldDefs.Count -1 Do
Begin
TestFN := UpperCase(T.FieldDefs[i].Name);
If TestFN = UpperFN Then
Begin
Result := True;
Break;
End;
End;
End;
T.Active := False;
Except
End;
End;
Finally
Query.Free;
T.Free;
End;
End;
]]>