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我希望做有文字输入和窗体上的验证/必填字段文件上传文件附件.

该脚本接受输入并允许用户附加文件.提交后,它会将输入字段添加到电子表格并将文件上传到我的驱动器.我想要做的是强制文本输入和下拉列表来回答并需要文件附件.

我发现此链接的示例"示例验证"但我在尝试将其添加到我的代码中的单击处理程序时遇到问题.任何人都可以帮助指出正确的方向吗？

// Script-as-app template.
var submissionSSKey = 'Insert SS Key';

function doGet(e) {
  var app = UiApp.createApplication().setTitle('Loan Registration Processing');
  var panel = app.createFormPanel();
  var grid = app.createGrid(10,2).setId('loanGrid');
  var loanTypeLabel = app.createLabel('Loan Type');
  var loanList = app.createListBox().setName('Loan List').setWidth('120px').setName('LoanType');
      loanList.addItem('Select Option');    
      loanList.addItem('FHA');
      loanList.addItem('Convential');  
      loanList.addItem('VA');
      loanList.addItem('Reverse');
      loanList.addItem('HELOC');
  var borrowerNameLabel = app.createLabel("Borrower's Name");
  var borrowerTextbox = app.createTextBox().setWidth('150px').setName('borrower');
  var loanAmountLabel = app.createLabel('Loan Amount');
  var loanAmountTextbox = app.createTextBox().setWidth('150px').setName('amount');
  var appDateLabel = app.createLabel('Loan Date');
  var appDateTextbox = app.createDateBox().setWidth('150px').setName('date');
  var lienPostition = …