如何在谷歌应用程序脚本中编写if /和语句

Question

我试图基于两个不同的下拉列表编写if /和语句.是否有可能用下面的逻辑写一些东西？"if &&"语句不能正常工作,但只需一个"if"语句就能正常工作.我理解这是一些代码,但这是我能够准确显示正在发生的事情的唯一方法.

    function doGet(e) {
  var app = UiApp.createApplication();

  var containerSizeList = app.createListBox().setId('containerSizeList').setName('containerSizeList');
  containerSizeList.addItem("20ft Long");
  containerSizeList.addItem("40ft Long");

  var loadingStyleList = app.createListBox().setId('loadingStyleList').setName('loadingStyleList');
  loadingStyleList.addItem("On Pallets");
  loadingStyleList.addItem("Floor Loaded");

    var tenPalletPanel = app.createHorizontalPanel().setId('tenPalletPanel').setVisible(true);
    var tenPalletLabel = app.createLabel('10 Pallets Available').setId('tenPalletLabel');
    var twentyPalletPanel = app.createHorizontalPanel().setId('twentyPalletPanel').setVisible(false);
    var twentyPalletLabel = app.createLabel('20 Pallets Available').setId('twentyPalletLabel');
    var loadingNotePanel = app.createHorizontalPanel().setId('loadingNotePanel').setVisible(false);
    var loadingNoteLabel = app.createLabel('Note: Only certain products may be floor loaded')
    .setId('loadingNoteLabel');

    var containerGrid = app.createGrid(1, 2);
    containerGrid.setWidget(0, 0, containerSizeList);
    containerGrid.setWidget(0, 1, loadingStyleList);

    var handlerJ = app.createServerClickHandler('palletChangeMe'); 
    containerSizeList.addChangeHandler(handlerJ);
    loadingStyleList.addChangeHandler(handlerJ);
    handlerJ.addCallbackElement(containerGrid);       

  app.add(containerGrid);
  app.add(tenPalletPanel);
  tenPalletPanel.add(tenPalletLabel);
  app.add(twentyPalletPanel);
  twentyPalletPanel.add(twentyPalletLabel);
  app.add(loadingNotePanel);
  loadingNotePanel.add(loadingNoteLabel);

  return app;
}

function palletChangeMe(e){
  var app = UiApp.getActiveApplication();

  if (e.parameter.containerSizeList == "40ft Long" && e.parameter.loadingStyleList == "On Pallets"){
    app.getElementById('tenPalletPanel').setVisible(false);
    app.getElementById('twentyPalletPanel').setVisible(true);
    app.getElementById('loadingNotePanel').setVisible(false);
}

  return app;
}

Answer 1

代替:

if (e.parameter.containerSizeList == "20ft Long"){
  and if (e.parameter.loadingStyleList == "On Pallets"){

应该:

if (e.parameter.containerSizeList == "20ft Long" && e.parameter.loadingStyleList == "On Pallets"){

注意:&&表示逻辑AND.阅读有关MDN逻辑运算符的更多信息.

并且你需要}在每个if语句中删除last ,所以最终的代码如下:

if (e.parameter.containerSizeList == "20ft Long" && e.parameter.loadingStyleList == "On Pallets"){
    app.getElementById('tenPalletPanel').setVisible(true);
    app.getElementById('twentyPalletPanel').setVisible(false);
}

if (e.parameter.containerSizeList == "40ft Long" && e.parameter.loadingStyleList == "On Pallets"){
    app.getElementById('tenPalletPanel').setVisible(false);
    app.getElementById('twentyPalletPanel').setVisible(true);
}