使用 IntraWeb (45) - 活用 IntraWeb

//在新建 IW 主窗体上放置 IWTemplateProcessorHTML1、IWLabel1 两个控件.

unit Unit1;

interface

uses
  Classes, SysUtils, IWAppForm, IWApplication, IWColor, IWTypes, IWVCLComponent, IWBaseLayoutComponent, IWBaseContainerLayout, IWContainerLayout,
  IWTemplateProcessorHTML, IWCompLabel, Vcl.Controls, IWVCLBaseControl, IWBaseControl, IWBaseHTMLControl, IWControl, IWCompButton, IWCompEdit;

type
  TIWForm1 = class(TIWAppForm)
    IWLabel1: TIWLabel;
    IWTemplateProcessorHTML1: TIWTemplateProcessorHTML;
    procedure IWAppFormCreate(Sender: TObject);
  public
    procedure DoCallBack1(EventParams: TStringList); //这是 IWForm1.js 将要调用的方法; 下面还需要通过 WebApplication.RegisterCallBack 注册一下
  end;

implementation

{$R *.dfm}

uses IW.Common.AppInfo; //获取路径需要

var gPath: string;

procedure TIWForm1.IWAppFormCreate(Sender: TObject);
begin
  LayoutMgr := IWTemplateProcessorHTML1;          //关联模板(IWForm1.html) 
  IWTemplateProcessorHTML1.RenderStyles := False; //禁用 IW 的样式设置

  WebApplication.RegisterCallBack(‘IWCallBack1‘, DoCallBack1); //注册回调

  gPath := TIWAppInfo.GetAppPath + ‘Data.txt‘; //用于测试文件的路径

  if not FileExists(gPath) then //初始化测试文件
  begin
    with TStringList.Create do begin
      Add(DateTimeToStr(Now));
      SaveToFile(gPath, TEncoding.UTF8);
      Free;
    end;
  end;

  IWLabel1.RawText := True; //指定以 Html 的方式呈现其内容; 具有 RawText 属性的几个控件中, 发现 IWLabel1 最灵活.
  IWLabel1.StyleRenderOptions.RenderSize := False;     //既然前面已经指定了 IWTemplateProcessorHTML1.RenderStyles := False; 下面这些就应该不需要了, 但在 IE 下不行
  IWLabel1.StyleRenderOptions.RenderPosition := False;
  IWLabel1.StyleRenderOptions.RenderFont := False;
  IWLabel1.StyleRenderOptions.RenderZIndex := False;
  IWLabel1.StyleRenderOptions.RenderVisibility := False;
  IWLabel1.StyleRenderOptions.RenderStatus := False;
  IWLabel1.StyleRenderOptions.RenderAbsolute := False;
  IWLabel1.StyleRenderOptions.RenderPadding := False;
  IWLabel1.StyleRenderOptions.RenderBorder := False;
end;

procedure TIWForm1.DoCallBack1(EventParams: TStringList);
var
  List: TStringList;
  x: Integer;
begin
  x := EventParams.Values[‘x‘].ToInteger; //获取 js 传来的参数

  List := TStringList.Create;
  List.LoadFromFile(gPath, TEncoding.UTF8);

  case x of
    1: List.Add(DateTimeToStr(Now));          //参数是 1 表示添加
    2: if List.Count > 0 then List.Delete(0); //参数是 2 表示删除
  end;

  IWLabel1.Text := List.Text.Replace(sLineBreak, ‘
‘); //呈现; 

  List.SaveToFile(gPath, TEncoding.UTF8);
  List.Free;
end;

initialization
  TIWForm1.SetAsMainForm;

end.

使用 IntraWeb (45) - 活用 IntraWeb

原文：http://www.cnblogs.com/del/p/3977660.html