I have TPopupMenu, items added at runtime. I want to sort em by caption: "Abc", "MyItem", "Zztop". I cannot find Sort method in lists of menu items.
Delphi7.
Since you add the items at runtime the preferred way would by adding the already sorted.
If you have to add items to a menu already containing items you might sort them by setting the MenuIndex for the items to the desired value.
An easy way would be to take the Items to a sorted StringList and apply the MenuIndex form the list.
Procedure SortMenuItems(Menu: TPopupMenu);
var
i: Integer;
sl: TStringList;
begin
sl := TStringList.Create;
try
sl.Sorted := true;
for i := 0 to Menu.Items.Count - 1 do
begin
sl.AddObject(Menu.Items[i].Caption, Menu.Items[i]);
end;
for i := 0 to sl.Count - 1 do
TMenuItem(sl.Objects[i]).MenuIndex := i;
finally
sl.Free;
end;
end;
Related
I have a table like this:
id parent_id name
1 1 Root
2 1 Car
3 1 Plane
4 2 BMW
5 4 CLK
How can I dynamically create popup menu with all subitems in Delphi?
This is how it should look like:
Assuming root element has NULL as Parent_ID you can issue the request
Select ID, Parent_ID, Name from all_my_menus
order by Parent_ID nulls first, ID
where Menu_ID = :MenuIDParameter
1 <NULL> Root
8 <NULL> another root
2 1 Car
4 1 Plane
3 2 BMW
5 4 CLK
You would also cache in-memory created menu items: var MI_by_id: TDictionary<integer, TMenuItem>;
The traversing through the results would look like
var MI: TMenuItem;
MI_by_id: TDictionary<integer, TMenuItem>;
begin
MI_by_id := TDictionary<integer, TMenuItem>.Create;
try
While not Query.EOF do begin
MI := TMenuItem.Create(Self);
MI.Caption := Query.Fields[2].AsString;
MI.Tag := Query.Fields[0].AsInteger; // ID, would be helpful for OnClick event
MI.OnClick := ...some click handler
if Query.Fields[1].IsNull {no parent}
then MainMenu.Items.Add(MI)
else MI_by_id.Items[Query.Fields[1].AsInteger].Add(MI);
MI_by_id.Add(MI.Tag, MI); //save shortcut to potential parent for future searching
Query.Next;
end;
finally
MI_by_id.Free;
end;
end;
Actually, since we made sort upon Parent_ID on the query, all the children for given parent make single continuous list, so could be better to remove populated parents from the dictionary after we populated last child (i.e. after parent_ID got new value) and caching previously found parent otherwise in another local variable (instead of making yet another search through the dictionary).
However reasonable size for human-targeted menu should be much less to worth this. But you have to understand this approach most probably scales as O(n*n) thus would start loose speed very fast as the table grows.
http://docwiki.embarcadero.com/Libraries/XE3/en/Vcl.Menus.TMenuItem.Add
http://docwiki.embarcadero.com/CodeExamples/XE2/en/Generics.Collections.TDictionary_(Delphi)
Note: this also requires that for every non-root element ID > ParentID (put CHECK CONSTRAINT on the table)
1 <NULL> Root
8 <NULL> another root
7 1 Plane
3 4 BMW
4 7 CLK
5 8 Car
This would lead to BMW tied to create before its parent CLK created.
Violation for that conditions can be overcome by few means:
recursive load: select <items> where Parent_id is null, then for each of the added menu items do select <items> where Parent_id = :current_memuitem_id and so on that. This is like VirtualTreeView would work
ask SQL server to sort and flatten the tree - this is usually called self-recursive SQL selection and is server-dependant.
introduce one more collection variable - menu items w/o parent. After each new item added to the menu this collection should be searched if there are pending children to extract from it and move into the newly created parent.
Too many solutions for such a simple problem. Too bad you got ordered ID's because without ordered ID's things would have been more fun. Here's my own solution. On an empty form drop a button, a TClientDataSet and a TPopupMenu. Make the form's PopupMenu = PopupMenu1 so you can see the result. Add this to Button1.OnClick:
Note: I'm intentionally using TClientDataSet and not a real Query. This question is not about the query and this solution works with whatever TDataSet descendant you throw at it. Just make sure the result set is ordered on id, or else you could see the child nodes before the parents. Also note, half the code is used to fill up the ClientDataSet with the sample data in the question!
procedure TForm16.Button1Click(Sender: TObject);
var Prev: TDictionary<Integer, TMenuItem>; // We will use this to keep track of previously generated nodes so we do not need to search for them
CurrentItem, ParentItem: TMenuItem;
begin
if not ClientDataSet1.Active then
begin
// Prepare the ClientDataSet1 structure
ClientDataSet1.FieldDefs.Add('id', ftInteger);
ClientDataSet1.FieldDefs.Add('parent_id', ftInteger);
ClientDataSet1.FieldDefs.Add('name', ftString, 100);
ClientDataSet1.CreateDataSet;
// Fill the dataset
ClientDataSet1.AppendRecord([1, 1, 'Root']);
ClientDataSet1.AppendRecord([2, 1, 'Car']);
ClientDataSet1.AppendRecord([3, 1, 'Plane']);
ClientDataSet1.AppendRecord([4, 2, 'BMW']);
ClientDataSet1.AppendRecord([5, 4, 'CLK']);
end;
// Clear the existing menu
PopupMenu1.Items.Clear;
// Prepare the loop
Prev := TDictionary<Integer, TMenuItem>.Create;
try
ClientDataSet1.First; // Not required for a true SQL Query, only required here for re-entry
while not ClientDataSet1.Eof do
begin
CurrentItem := TMenuItem.Create(Self);
CurrentItem.Caption := ClientDataSet1['name'];
if (not ClientDataSet1.FieldByName('parent_id').IsNull) and Prev.TryGetValue(ClientDataSet1['parent_id'], ParentItem) then
ParentItem.Add(CurrentItem)
else
PopupMenu1.Items.Add(CurrentItem);
// Put the current Item in the dictionary for future reference
Prev.Add(ClientDataSet1['id'], CurrentItem);
ClientDataSet1.Next;
end;
finally Prev.Free;
end;
end;
Try this
procedure TForm1.MyPopup(Sender: TObject);
begin
with Sender as TMenuItem do ShowMessage(Caption);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
MyItem,MySubItem1: TMenuItem;
begin
Inc(Num);
MyItem:=TMenuItem.Create(Self);
MySubItem1:=TMenuItem.Create(Self);
MyItem.Caption:='Hello'+IntToStr(Num);
MySubItem1.Caption:='Good Bye'+IntToStr(Num);
MainMenu1.Items.Add(MyItem);
MainMenu1.Items[0].Insert(num-1,MySubItem1);
MyItem.OnClick:=MyPopUp;
MySubItem1.OnClick:=MyPopUp;
end;
Taken from http://www.greatis.com/delphicb/tips/lib/components-addmenuitem.html
This solution requires parent_id of root to be 0, tested with
Select 1 as ID, 0 as Parent_ID, 'Root' as Name
union
Select 2, 1, ' Car'
union
Select 3 , 1, 'Plane'
union
Select 4, 2, 'BMW'
union
Select 5, 4, 'CLK'
should by optimized, have just a lack of time ...
Function GetMenu(pop:TPopupmenu;ID:Integer):TMenuItem;
var
i:Integer;
Function CheckItem(mi:TMenuItem):TMenuItem;
var
i:Integer;
begin
Result := nil;
if mi.Name = 'DYN_' + INtToStr(ID) then Result := mi
else for i := 0 to mi.Count-1 do
if not Assigned(Result) then Result := CheckItem(mi[i]);
end;
begin
Result := nil;
for i := 0 to pop.Items.Count-1 do
begin
if not Assigned(Result) then Result := CheckItem(pop.Items[i]);
if Assigned(Result) then Break;
end;
end;
Function InsertMenuItem(pop:TPopupMenu;mi:TMenuItem;ID:Integer;Const caption:String):TMenuItem;
begin
Result := TMenuItem.Create(pop);
Result.Caption := caption;
Result.Name := 'DYN_' + INtToStr(ID) ;
if not Assigned(mi) then pop.Items.Add(Result) else mi.Add(Result);
end;
Function AddMenuItem(pop:TPopupmenu;ID:Integer;Ads:TDataset):TMenuItem;
begin
Ads.Locate('ID',ID,[]);
Result := GetMenu(pop,id);
if (not Assigned(Result)) then
begin
if (Ads.FieldByName('parent_ID').AsInteger<>0) then
begin
result := AddMenuItem(pop,Ads.FieldByName('parent_ID').AsInteger,Ads);
Ads.Locate('ID',ID,[]);
end;
Result := InsertMenuItem(pop,Result,ID,Ads.FieldByName('Name').AsString);
end;
Ads.Locate('ID',ID,[]);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
while not ADS.Eof do
begin
AddMenuItem(Popupmenu1,ads.FieldByName('ID').AsInteger,Ads);
Ads.Next
end;
end;
Interesting conundrum ...another late night thought, a practical answer for re-use :)
Make a derived component:
type
TCascadeMenuItem = class(TMenuItem)
private
Id: Integer;
public
function AddItem(const ToId, WithId: Integer; AName: string): Boolean;
end;
with code
function TCascadeMenuItem.AddItem(const ToId, WithId: Integer; AName: string): Boolean;
var
i: Integer;
cmi: TCascadeMenuItem;
begin
if ToId = Id then
begin
cmi := TCascadeMenuItem.Create(Owner);
cmi.Caption := AName;
cmi.Id := WithId;
Add(cmi);
Result := True;
end
else begin
i := 0;
Result := False;
while (i < Count) and (not Result) do
begin
Result := TCascadeMenuItem(Items[i]).AddItem(ToId,WithId, ANAme);
inc(i);
end;
end;
end;
Main form, Assumes your data:
procedure TForm4.Button2Click(Sender: TObject);
var
mi: TCascadeMenuItem;
i: Integer;
Added: Boolean;
begin
cds1.First;
while not cds1.Eof do
begin
i := 0;
Added := False;
while (i < pup.Items.Count) and (not Added) do
begin
Added := TCascadeMenuItem(pup.Items[i]).AddItem(cds1Parent_Id.AsInteger, cds1id.AsInteger, cds1name.AsString);
inc(i);
end;
if not Added then
begin // new root
mi := TCasCadeMenuItem.Create(Self);
mi.Caption := cds1name.AsString;
mi.id := cds1Parent_Id.AsInteger;
pup.Items.Add(mi);
end;
cds1.Next;
end;
end;
You could derive a TCascasePopupMenu and put it on the palette :)
On my system , the main menu is fully dynamic, is builded from data in the database.
I have a specific situation where some menu items need to be assembled before being displayed.
Let's assume that my menu has the following main items:
Files - Customer - Reports - About
When I click in Reports menu item must assemble the items before they are displayed.
I did an analysis of the code in TMainMenu, TMenu and TMenuItem class. Unfortunately I have not found a simple solution to the problem.
Exist a way to create these items before being displayed?
There is a trick you can use. You need to add one dummy TMenuItem under Reports and set its Visible property to False. Then add OnClick event to Reports item and do your populating logic there. Before you add new items you have to delete existing ones, but you should leave your dummy item intact.
Something like:
procedure TForm1.ReportItemClick(Sender: TObject);
var
Item: TMenuItem;
I: Integer;
begin
// Delete all items but first - dummy - one
for I := ReportItem.Count - 1 downto 1 do
ReportItem.Items[I].Free;
Item := TMenuItem.Create(ReportItem);
Item.Caption := 'abc';
// Item.OnClick := ...
// or
// Item.Action := ...
ReportItem.Add(Item);
Item := TMenuItem.Create(ReportItem);
Item.Caption := '123';
// Item.OnClick := ...
// or
// Item.Action := ...
ReportItem.Add(Item);
end;
Lets Suppose that you have an DS (TDataSet) how load all your data reports. And in the moment that you drop Reports Menu you can call UpdateMenuReport.
type
TMenuArray = array of TMenuItem;
var MyMenu: TMenuArray;
procedure TMain.MyClickPopupMenu(Sender: TObject);
begin
case TMenuItem(TMenuItem(Sender).Parent).Tag of
// do Something
end;
end;
procedure TMain.UpdateMenuReport;
procedure InitMyMenu(var AMenu: TMenuArray);
var i: Integer;
begin
if Length(AMenu)>0 then for i:= 0 to Length(AMenu)-1 do AMenu[i].Free;
SetLength(AMenu, 0);
end;
var j, i: integer;
begin
InitMyMenu(MyMenu);
Reports.Clear;
if DS.Active and (DS.RecordCount > 0) then
begin
SetLength(MyMenu, DS.RecordCount);
for i:= 0 to DS.RecordCount-1 do
begin
MyMenu[i] := TMenuItem.Create(Self);
MyMenu[i].Name := 'Reports_'+ IntToStr(i);
MyMenu[i].Caption := DS.FieldByname('NOM_REPORT').AsString;
MyMenu[i].Tag := DS.FieldByname('ID').AsInteger;
MyMenu[i].OnClick := MyClickPopupMenu;
end;
end;
end;
I have a function to update a cxGrid made with help from answers to Loop through records on a cxgrid and update a field/column
But it is sometimes acting a bit strange. If I open the form with the cxGrid and click the columnheader without doing anything else, the records are updateted OK. But if the 'selectorbar' is moved away from the top, the record marked is not updated.
I am sure it is a property that needs to be changed, but which one.
The variable fSelected is set to False at FormShow and is ther so that the user can unselect records as well.
procedure TfrmContactsSelect.colContactSelectedHeaderClick(Sender: TObject);
var
i: Integer;
Index: Integer;
BookMark : TBookMark;
Contact: variant;
begin
if fMulti = True then
begin
Screen.Cursor := crHourGlass;
fSelected := not fSelected;
BookMark := qryContacts.GetBookmark;
qryContacts.DisableControls;
try
for i := 0 to grdContactsView1.DataController.FilteredRecordCount - 1 do
begin
Index := grdContactsView1.DataController.FilteredRecordIndex[i];
Contact := grdContactsView1.DataController.Values[Index, 4];
if grdContactsView1.DataController.LocateByKey(Contact) then
begin
qryContacts.Edit;
qryContacts.FieldByName('fldcontact_selected').AsBoolean := fSelected;
qryContacts.Post;
end;
end;
finally
qryContacts.EnableControls;
qryContacts.GotoBookmark(BookMark);
qryContacts.FreeBookmark(BookMark);
end;
Screen.Cursor := crDefault;
end;
end;
Delphi XE7, DevExpress 14.2.2, UniDAC 5.5.12 for DB access
Comment:
I have ended up with the following solution based on the answer and input from MartynA
procedure TfrmContactsSelect.colContactSelectedHeaderClick(Sender: TObject);
var
i: Integer;
Index: Integer;
MarkedRecord: variant;
CurrentRecord: variant;
begin
if fMulti = True then
begin
Screen.Cursor := crHourGlass;
fSelected := not fSelected;
Index := grdContactsView1.DataController.FocusedRecordIndex;
MarkedRecord := grdContactsView1.DataController.Values[Index, colContactGuid.ID];
try
for i := 0 to grdContactsView1.DataController.FilteredRecordCount - 1 do
begin
Index := grdContactsView1.DataController.FilteredRecordIndex[i];
CurrentRecord := grdContactsView1.DataController.Values[Index, colContactGuid.ID];
if grdContactsView1.DataController.LocateByKey(CurrentRecord) then
begin
grdContactsView1.DataController.Edit;
grdContactsView1.DataController.SetEditValue(colContactSelected.ID, fSelected, evsText);
grdContactsView1.DataController.Post;
end;
end;
finally
grdContactsView1.DataController.LocateByKey(MarkedRecord);
end;
Screen.Cursor := crDefault;
end;
end;
I can reproduce your problem using the sample project I posted in my answer to your other q.
Try this: Add a TMemo to your form, and inside the 'if grdContactsView1.DataController.LocateByKey(Contact) then' block, write the value of a row-unique datafield and the Selected datafield value to the memo.
Then, what I get when some row other than the top row is selected is that one row is listed twice in the memo, with Selected both false and true, and one of the rows in the filter isn't listed at all, which I think accounts for the behaviour you're seeing. If I then comment out the .Edit .. .Post lines, it correctly lists all the rows in the filter.
So evidently doing the Selected field changes inside a block which iterated the FilteredRecordIndex property of the DBTableView is what's causing the problem.
Personally, I find that it goes a bit against the grain to modify dataset rows in code via a DB-aware control (because you usually end up fighting the DB-awareness of the control), but in this case, it's straightforward to do the processing via the DBTableView of the cxGrid.
procedure TForm1.ProcessFilteredRecords;
var
PrevV,
V : Variant;
i,
Index: Integer;
S : String;
begin
// First, pick up a reference to the current record
// so that we can return to it afterwards
Index := cxGrid1DBTableView1.DataController.FocusedRecordIndex;
PrevV := cxGrid1DBTableView1.DataController.Values[Index, 0];
try
for i := 0 to cxGrid1DBTableView1.DataController.FilteredRecordCount - 1 do begin
Index := cxGrid1DBTableView1.DataController.FilteredRecordIndex[i];
V := cxGrid1DBTableView1.DataController.Values[Index, 0];
if cxGrid1DBTableView1.DataController.LocateByKey(V) then begin
cxGrid1DBTableView1.DataController.Edit;
// 2 is the index of my Selected column in the grid
if cxGrid1DBTableView1.DataController.SetEditValue(2, True, evsText) then
Caption := 'OK'
else
Caption := 'Failed';
cxGrid1DBTableView1.DataController.Post;
end;
end;
finally
if cxGrid1DBTableView1.DataController.LocateByKey(PrevV) then
Caption := 'OK'
else
Caption := 'Failed';
end;
end;
Another way to avoid the problem is to change the Selected states in two steps:
Iterate the FilteredRecordIndex to build a list of rows to change - in your case this would be a list of guids
Then, iterate the list of rows and update their Selected states.
Code:
procedure TForm1.ProcessFilteredRecords;
var
V : Variant;
i,
Index: Integer;
BM : TBookMark;
S : String;
TL : TStringList;
begin
Memo1.Lines.Clear;
TL := TStringList.Create;
try
for i := 0 to cxGrid1DBTableView1.DataController.FilteredRecordCount - 1 do begin
Index := cxGrid1DBTableView1.DataController.FilteredRecordIndex[i];
V := cxGrid1DBTableView1.DataController.Values[Index, 0];
if cxGrid1DBTableView1.DataController.LocateByKey(V) then begin
if CDS1.FieldByName('Selected').AsBoolean then
S := 'True'
else
S := 'False';
S := CDS1.FieldByName('Name').AsString + ' ' + S;
Memo1.Lines.Add(S);
TL.Add(CDS1.FieldByName('Guid').AsString);
end;
end;
try
BM := CDS1.GetBookMark;
CDS1.DisableControls;
for i := 0 to TL.Count - 1 do begin
if CDS1.Locate('guid', TL[i], []) then begin
CDS1.Edit;
CDS1.FieldByName('Selected').AsBoolean := True;
CDS1.Post;
end
end;
finally
CDS1.EnableControls;
CDS1.GotoBookmark(BM);
CDS1.FreeBookmark(BM);
end;
finally
TL.Free;
end;
end;
Like you, I was expecting that changing a property or two of the cxGrid might avoid the problem without any code, but I haven't been able to find anything which does.
i have some list inside a list view i want to prevent Adding items that already exist and allow only items that's not exist i search about that before i post my question i find some codes that removes the duplicated items but thats not my point , a little example of what aim trying to achieve , example
listview1.Items.Add.caption := 'item1'
listview1.Items.Add.subitems.add:= 'content'
listview1.Items.Add.caption := 'item2'
listview1.Items.Add.subitems.add:= 'content2'
listview1.Items.Add.caption := 'item3'
listview1.Items.Add.subitems.add:= 'content3'
//duplicated line
listview1.Items.Add.caption := 'item1'// here what i want to ignore if exist and add any other items comes below
listview1.Items.Add.subitems.add:= 'content'
listview1.Items.Add.caption := 'item4'
listview1.Items.Add.subitems.add:= 'content4'
any idea on how to achieve that ignore exist items and add what ever other items ?
Current code
if Command = 'CallThis' then
begin
if Assigned(MS) then
begin
SL := TStringList.Create;
try
SL.LoadFromStream(MS);
for I := 0 to SL.Count -1 do
begin
Line := SL.Strings[I];
ExplodeLine(Line, item, content, num);
with vieform.list.Items.Add do
begin
Caption := StripHTML(item);
Subitems.Add(content);
Subitems.Add(num)
end;
end;
finally
SL.Free;
end;
MS.Free;
end;
end;
You should not use the visual controls to store and manage your data. Have a list for all the data and present the data in the listview or any other control you like.
// class to store data (shortend)
TMyData = class
constructor Create( const Item, Content : string );
property Item : string;
property Content : string;
end;
// list to organize the data
MyList := TObjectList<TMyData>.Create(
// comparer, tell the list, when are items equal
TComparer<TMyData>.Construct(
function ( const L, R : TMyData ) : integer
begin
Result := CompareStr( L.Item, R.Item );
end ) );
// create an item
MyData := TMyData.Create( 'item1', 'content1' );
// check for duplicate in list
if not MyList.Contains( MyData ) then
MyList.Add( MyData )
else
MyData.Free;
// present the list in a ListView
ListView1.Clear;
for MyData in MyList do
begin
ListItem := ListView1.Items.Add;
ListItem.Data := MyData; // store a reference to the data item
ListItem.Caption := MyData.Item;
ListItem.SubItems.Add( MyData.Content );
end;
Thats all
Just write your own procedure which does all the work for you. Also helps with your sub items, except I'm not sure what you were trying to do in your code (This is what I'm assuming you were attempting to do)...
procedure TForm1.Add(const Caption, Sub: String);
var
I: TListItem;
X: Integer;
begin
for X := 0 to ListView1.Items.Count-1 do
if SameText(ListView1.Items[X].Caption, Caption) then Exit;
I:= ListView1.Items.Add;
I.Caption:= Caption;
I.SubItems.Add(Sub);
end;
Then, you simply call it like this:
Add('Item1', 'Content');
Add('Item2', 'Content2');
Add('Item3', 'Content3');
Add('Item1', 'Content1');
That would result in 3 items in the list, because the 4th already exists.
Please note however that this may not actually solve your real underlying issue. If you feel the need to perform this check, then it's probably a good time to re-think your design. The approach you're using makes me believe you're using the TListView to store data. UI controls should never be the container of actual data, it should only provide the interface to the user.
i have a problem on how to retrieve the items in memo from table into tchecklistbox...before this i do the procedure to insert the items that have been checked into memo in tbl POS_CatBreakDownValue..but now i want to know how to retrieve items from table and automatic check in tchecklistbox...thanks..here my procedure to insert the checklist into memo in table..i hope anyone can help me..thanks
procedure TfrmSysConfig.saveCatBreakDownValue;
var
lstCat:TStringList;
i :integer;
begin
lstcat := TStringList.Create;
try
for i:=0 to clCat.Items.Count-1 do begin
if clCat.Checked[i] then begin
lstcat.Add(clcat.Items.Strings[i]);
end;
end;
tblMainPOS_CatBreakDownValue.Value := lstCat.Text;
finally
lstcat.Free;
end;
end;
procedure TfrmSysConfig.saveCatBreakDownValue;
var
lstCat: TStringList;
i:integer;
begin
lstcat := TStringList.Create;
try
for i:=0 to clCat.Items.Count-1 do begin
if clCat.Checked[i] then begin
lstcat.Add(clcat.Items.Strings[i]);
end;
end;
tblMainPOS_CatBreakDownValue.Value := lstCat.Text;
finally
lstcat.Free;
end;
end;
Reading your code I'm guessing you've got a MemoField in a database that you are reading and writing the checked values from/to. You also have a predefined list of checkable items.
So you'll need to create a new string list and read the field back into it (Revesing the writing code). for each item in the list get the Index and check it.
Something like..
procedure TfrmSysConfig.saveCatBreakDownValue;
var
lstCat: TStringList;
i, Index:integer;
begin
lstcat := TStringList.Create;
try
lstcat.Text = tblMainPOS_CatBreakDownValue.Value;
for i:=0 to lstcat.Count-1 do
begin
Index := clCat.Items.IndexOf(lstcat.Items[i])
if Index > -1 then
begin
clCat.Checked[Index] := True;
end;
end;
finally
lstcat.Free;
end;
end;
Not sure I understand your question 100%
TCheckListBox can check or uncheck items using the Checked Property.
CheckListBox.Checked[Index] := True/False;
Since you sound like your comparing strings you may need to determine the index in the TCheckListBox based on the string this can be done like this:
CheckListBox1.Items.IndexOf('StringToFind')
If the string is not found then the result is -1;
If you want to check lines in a TMemo Control and see if they exists as rows in a table you can do the following.
While not Table.EOF do
begin
if Memo1.lines.IndexOf(Table.FieldByName('MyField').AsString) = -1 then
begin
// What you want to do if not found
end
else
begin
// what you want to do if it is found.
end;
Table.Next;
end;