Void autoFill(ElementTree form, DataSource mainvars, Dict<String, [String]> extravars=Dict::new())
Arguments
form: The form element (or a subset of that if you only wish to automatically fill a part of the form.mainvars: The data source to use (e.g.DataPost)extravars: An optional dictionary mapping keys to lists of values, to allow a form to be automatically filled from a database. You may or may not need to useDataNoneas your main data source in this case.
Usage
Automatically fill a HTML form based on data from a particular data source. This makes it easy to construct web forms with error handling - see the webapp tutorial for more information.
ElementTree OnHello(Int dummy) {
div = anonymousBlock; // we create this temporarily.
fname = incomingValue("fname",DataPost);
lname = incomingValue("lname",DataPost);
if (fname != "" && lname != "") {
p = addParagraph(div,"Hello "+fname+" "+lname);
return p;
} else {
form = HelloForm();
// if they entered one of first and last name, make sure it's still in the form
autoFill(form,DataPost);
return form;
}
}
ElementTree helloForm() {
parent = anonymousBlock;
form = addLocalForm(parent);
f1 = addFieldset(form,"Who are you?");
input = addLabelledInput(f1,"Your First Name",InputText,"fname","",0);
input = addLabelledInput(f1,"Your Last Name",InputText,"lname","",0);
submit = addLocalControlInput(f1,"Say hello",OnHello,1);
return form;
}