required

问题 I have a TextBox where i add a number and at a buttonclick i create new textboxes depending on what number i put in my first TextBox. For example i put 5 in the TextBox and press button i get 5 new textboxes on my page. Now im trying to make a RequiredFieldValidator on all of this textboxes thats created but i can't get it to work. I have another button that makes an insert to my db and this values from all the new textboxes are required. Can someone take a look at my code to see if im on the

问题 required attribute doesn't work on my form. What am I doing wrong? Here is my code in HTML: <form id="main-contact-form" method="POST"> <fieldset class="form-group"> <input id="name" placeholder="Nome" class="form-control" type="text" tabindex="1" required /></fieldset> <fieldset class="form-group"> <input id="email" placeholder="E-mail" class="form-control" type="email" tabindex="2" required /></fieldset> <fieldset class="form-group"> <input id="phone" placeholder="Numero di telefono" class=

问题 I'm Andrew from Italy, I'm trying to adapt a script I've found on line. It's a script that creates an HTML form and uploads answers in a spreadsheet. This is the tutorial from wich I've started: GS CODE: var dropBoxId = "XXXXXXXXXXXXXXXX"; // Drive ID of 'dropbox' folder var logSheetId = "XXXXXXXXXXXXXXXXX"; // Drive ID of log spreadsheet function doGet(e) { return HtmlService.createHtmlOutputFromFile('form.html'); } function uploadFiles(formObject) { try { // Create a file in Drive from the

问题 I don't really understand how @required works. For example I've seen this code: class Test{ final String x; Test({ @required this.x }); factory Test.initial(){ return Test(x: ""); } } But what should @required do here? Seems like it makes an optional parameter a non optional parameter. 回答1: @required is needed when you have more than 1 named parameters and you want some of the parameters to be mandatory, you annotate it using @required . Example class Test { final String a; // say a is

问题 I have this schema var StuffSchema = new mongoose.Schema({ _id: { type: String, required: true, unique: true }, name: { type: String, required: true } }); mongoose.model('Stuff', StuffSchema); Works fine. Now I need to add another schema "Cargo" containing this mystuff: { type:[String], ref: 'Stuff', required:true}, that is, I want mystuff to contain array of ids of Stuff, but this fails with validation error when running this code mongoose.model('Cargo').create( some data...) if I use an

问题 I have specific use case for JSF validation. For example I have an inputText field: <p:inputText id="input" required="#{myBean.required}" value="#{myBean.value}" maxlength="20" disabled="#{myBean.disabled}"> <p:ajax event="blur" process="@this" update="name" listener="#{myBean.listener}"/> </p:inputText> Value of input is number (in some cases it can also be a string, because this is part of composite component, but problem is better described if we assume this is a number). This input is

问题 int main() { int x[3]={4,5,6}; int *p=x; p +1=p;/*compiler shows error saying lvalue required as left operand of assignment*/ cout<<p 1; getch(); } 回答1: When you have an assignment operator in a statement, the LHS of the operator must be something the language calls an lvalue . If the LHS of the operator does not evaluate to an lvalue , the value from the RHS cannot be assigned to the LHS. You cannot use: 10 = 20; since 10 does not evaluate to an lvalue . You can use: int i; i = 20; since i

问题 Is it possible to style the hint that appears on a HTML5 input field when using the required attribute. If you're not sure what I'm talking about click submit on this form without filling anything in. You should have a hint popup. http://24ways.org/examples/have-a-field-day-with-html5-forms/24ways-form.html I've checked the CSS source and couldn't see anything regarding the hint. I have found that styling the div element in a reset fashion affects how it appears. But I do not know how to

问题 I'm curious to know what's the difference between code like this: class MyClass { @Autowired MyService myService; } and code like this: class MyClass { MyService myService; @Required public void setMyService(MyService val) { this.myService = val; } } 回答1: @Autowired annotation is used when you want to autowire a bean. @Autowired is not limited to setter. It can be used with a constructor and a field as well. If you use @Autowired annotation on a field, that field will be autowired with bean

问题 Here is my html code <form id="form1" runat="server"> <input id="q" required /> <input id="btn" type="submit" value="Search"> </form> I have used html5 required field validators, it works but with a post back. so modified the code as follows to avoid postback <form id="form1" runat="server"> <input id="q" required /> <input id="btn" type="button" value="Search"> </form> But the required validator doesn't work 回答1: That's because the required validator is only called on submit, and the type