Mega Code Archive
Looking for text in any part of a field
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Title: Looking for text in any part of a field
Question: A function to search text in part of a field of any dataset
Answer:
Looking for text in any part of a field
The following function searches for text in any part of a field of any dataset (it can be for example a TTable, TQuery, TADOTable, TADOQuery, TIBTable, TIBQuery, etc.)
type
TLocateStrOption = (loCaseSensitive, loContinue);
TLocateStrOptions = set of TLocateStrOption;
function LocateStr(Dataset: TDataset; Field: TField; Str: String;
LocateOptions: TLocateStrOptions): boolean;
// Searches text in any part of a dataset field. The search can be
// case sensitive (option loCaseSensitive) and can start from the
// beginning or from the current record (option loContinue).
//
// Returns True if the string was found (the dataset is positioned
// in that record) and False otherwise (the dataset is left in EOF)
var
ControlsDisabled: boolean;
begin
ControlsDisabled := Dataset.ControlsDisabled;
if not ControlsDisabled then Dataset.DisableControls;
try
if loContinue in LocateOptions then begin
if not Dataset.Eof then Dataset.Next;
end else
Dataset.First; // Start from the beginning
if not (loCaseSensitive in LocateOptions) then
Str := UpperCase(Str);
while not Dataset.Eof do begin
if loCaseSensitive in LocateOptions then begin
if Pos(Str, Field.AsString) 0 then break;
end else begin
if Pos(Str, UpperCase(Field.AsString)) 0 then break;
end;
Dataset.Next;
end;
Result := Dataset.Eof;
finally
if not ControlsDisabled then Dataset.EnableControls;
end;
end;
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