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冥界3大法王 发表于 2021-5-15 13:02

Memo1里扔啥代码能正常运行？

unit Unit3;

interface

uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs,
Vcl.StdCtrls;

type
TForm3 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
private
    { Private declarations }
public
    m_OLE: Variant;
    { Public declarations }
end;

var
Form3: TForm3;

implementation

{$R *.dfm}

uses
ComObj;

function RunJs(const JsCode, JsVar: string): string;
var
script: OleVariant;
begin
try
    script := CreateOleObject('ScriptControl');
    script.Language := 'JavaScript';
    script.ExecuteStatement(JsCode);
    Result := script.Eval(JsVar);
except
    Result := '';
end;
end;

procedure TForm3.Button1Click(Sender: TObject);
var
OpenDlg: TOpenDialog;
FileName: string;
begin
OpenDlg := TOpenDialog.Create(nil);
try
    OpenDlg.Filter := 'JavaScript脚本|*.*';
    OpenDlg.DefaultExt := '*.*';
    if OpenDlg.Execute then
    begin
      FileName := Trim(OpenDlg.FileName);
      if FileName <> '' then
      begin
      Memo1.Lines.LoadFromFile(FileName, TEncoding.UTF8);
      end;
    end;
finally
    FreeAndNil(OpenDlg);
end;
end;

procedure TForm3.Button2Click(Sender: TObject);
var
s: string;
begin
s := RunJs(Memo1.Text, 'str');
ShowMessage(s);
end;

procedure TForm3.Button3Click(Sender: TObject);
var
js: OleVariant;
begin
js := CreateOleObject('ScriptControl'); //创建组件
js.Language := 'JavaScript'; //指定组件所使用的语言，也可以是VBScript
ShowMessage(js.Eval('100+1')); //计算100+1的值
js := Unassigned;
end;

end.

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