Delphi loop through components
WebSep 29, 2014 · as an "alternative" you could use two variables and absolute: var X: Pointer; y:TMyObject absolute x;. Now you can do for x in List do y.doSomeThing (); – Ritsaert Hornstra Sep 30, 2014 at 5:40 Add a comment 3 Answers Sorted by: 5 Using generics you can have a typed objectlist (just noticed the comment but ill finish this anyhow) WebSep 26, 2024 · However, for the sake of learning purposes, I am trying to figure out how I am able to loop thru this array of products components (rendered in App) to only display, for example, prices that are greater than 10 or descriptions that are longer than 10 characters, for example.
Delphi loop through components
Did you know?
WebJul 16, 1998 · Looping Through the Controls and Components Arrays. Technical Information Database TI1567D.txt Looping Through the Controls and Components … WebOct 12, 2016 · List of Delphi controls on a form – Tree hierarchy and flat list (VCL) Get a list of all controls in your Delphi VCL form. Examples included a flat list and a hierarchical …
WebDec 4, 2013 · You don't really want the Components array (which is what the for - in loop iterates over) since it has nothing to do, in general, with the parent-child relationship. Components can own things that have no child relationship, and controls can have … WebMar 12, 2015 · Crucially however, a Form is not considered to be the parent of directly placed non-visual components. Therefore, if HasParent is FALSE for a non-visual component on a form (an item in Form.Components) then it is a directly placed component, not a child of some other component. Simply modify your if condition as …
WebOct 20, 2024 · 1 I have a Delphi packed record: type PFileList = ^TFileList; TFileList = Packed Record ProfileName: string; ProfileDescription: string; ProfileMemo: string; CustomURL: string; SSOProperties: string; end; type TArrOfFileList = array of TFileList; I have a variable FProfileModel that is of type TArrOfFileList. WebMar 19, 2003 · puts the found buttons captions in a list box procedure TForm1.Button2Click (Sender: TObject); var Loop: Integer; begin for Loop:= 0 to Pred (ComponentCount) do if Components [Loop] is TButton then Listbox1.Items.Add ( (Components [Loop] as TButton).Caption); end; Alter this to look for combo boxes and store there selected text …
WebOct 12, 2016 · 2. Loop through the frame's Components [] list. Tag is a public property of TComponent. var Comp: TComponent; I: Integer; begin for i := 0 to frame.ComponentCount-1 do begin Comp := frame.Components [i]; if Comp.Tag = 1 then begin (Comp as TWinControl).SetFocus; break; end; end; end; An alternative would be to define an …
WebApr 17, 2012 · if you are an Delphi 2010 (and higher) user then there is a new RTTI unit (rtti.pas). you can use it to get runtime information about your class and its properties (public properties by default, but you can use {$RTTI} compiler directive to include protected and private fields information). how to microwave frozen ravioliWebMar 19, 2013 · Author Topic: Iterate through components on TTabSheet (Read 11761 times) ProgEd. New Member; Posts: 25; ... Not sure, if it's true for Lazarus, but in Delphi the control is not in the list if it's placed on the child container, like TPanel ot TTabSheet. So iterating through Components on the form will give you everything on the form, but ... multiple startup class in .net coremultiple stages of ckd documentedWebJul 27, 2001 · Loop throu controls in form. 3. Using a loop to control components. 4. Iterate through edit controls text property. 5. Iterate through multiple controls. 6. Iterating … multiple ssid google wifiWebJul 16, 1998 · Basically, this process involves iterating through the FieldDefs property of the TTable, TQuery, or TStoredProc component. The FieldDefs property is essentially an array of records, one record for each field in the structure. Each field record contains information about the field, including its name, type, and size. multiple statements found whileWeb5. You can write the source component into a stream and read it back into the target component. MemStream := TMemoryStream.Create; try MemStream.WriteComponent (Source); MemStream.Position := 0; MemStream.ReadComponent (Target); finally MemStream.Free; end; You may get problems with duplicate component names though. how to microwave frozen vegetablesWebAug 27, 2024 · Installation. Menu Tools->Options->Language->Delphi->Library. Download latest version here, and unzip downloaded file to your default components folder. This is a non-visual library, so you don’t need to install it on IDE. Add folder according your Delphi version and Platform in Tools->Options->Language->Delphi->Library to Library Path. multiple stable states in natural ecosystems