Прочитать данные из другого дочернего окна

{codecitation class=»brush: pascal; gutter: false;» width=»600px»}

Оформил: DeeCo

Автор: http://www.swissdelphicenter.ch

type

TMDIChildForm = class(TForm)

Edit1: TEdit;

private

{ Private declarations }

procedure ReadDataFromOtherMDIChildForm;

end;

var

MDIChildForm: TMDIChildForm;

implementation

{$R *.DFM}

uses

MainForm;

// Property FormStyle of this form is fsMDIForm

procedure TMDIChildForm.ReadDataFromOtherMDIChildForm;

var

i: Integer;

DataFromOtherForm: string;

begin

// Suppose you have created three different MDIChild forms of the same type,

// each with the following caption: «aaa», «bbb», «ccc».

// You are currently on form with caption «aaa» and want to read data

// contained on form with caption «ccc».

// You can find here the code, you have to use the «as» clause and

// properties MDIChildCount and MDIChildren:

// First you have to find where the form «ccc» is in memory;

for i := 0 to MDIForm.MDIChildCount — 1 do

begin

if (Pos(‘ccc’, MDIForm.MDIChildren[i].Caption) 0) then

Break;

end;

// Check to see if the form is the last on MDIChildren array and

// correct I variable

if (i = MDIChildCount) then Dec(i);

// I variable contains the index of the form with caption ‘ccc’

if (Pos(‘ccc’, MDIForm.MDIChildren[i].Caption) 0) then

begin

// If the form with caption ‘ccc’ exists then you access data and show it

// The following line of code is very interesting, look at the «as» clause,

// if you have different types of MDIChild forms, you simply change

// the type of form after the «as» clause

// The data you want is contained on Edit1.Text

with (MDIForm.MDIChildren[I] as TMDIChildForm).Edit1 do

DataFromOtherForm := Text;

ShowMessage(DataFromOtherForm);

end;

end;

{/codecitation}