Can i use an anchor tag to submit a form? In this code i am using a submit button which is standard but how to use a anchor tag <a href=Cart?removeId=${cartItem.productId>Remove</a>
I tried this, but the doGet() method is being called in the servlet. I want to call the doPost() method obviously. So could i use a better approach.
<c:forEach items="${lstCart}" var="cartItem" varStatus="count">
<form action="Cart" method=Post>
<tr height="40px">
<td>${count.count}</td>
<td>${cartItem.productName}</td>
<td>${cartItem.quantity}</td>
<td>${cartItem.unitPrice}</td>
<td>${cartItem.totalPrice}</td>
<td>
<input type="hidden" name="id" value="${cartItem.productId}" />
<input type=submit value="x"></td>
</tr>
</form>
</c:forEach>
You need to use JavaScript to make an anchor link do a post. You might use CSS to style your submit button and make it look more like a link, though.
Yep as #JB said you can post the form using JScript. One example that comes to my mind is below with struts, here you are actually passing the product id as a variable to JS method (I changed the names so it matches your example).
<a href="#" onclick="removeProduct(${cartItem.productId})">
Remove
</a>
You can then have JS method to be
function removeProduct(productId) {
document.forms["formname"].elements["productId"].value =
productId;
document.forms["formname"].submitTestPost.click();
}
This also assumes the following is defined in the page (so JS can set it) and the submit property (tag SubmitTag). I am not sure in your case the setup but perhaps you can draw some points.
<input type="hidden" name="productId"/>
Related
If I create a form using form tag helper the submit button triggers the OnPost event
<form method="post" asp-page="login">
However if I use
<form method="post" action="/auth/login">
The OnPost event is not fired.
And yes, asp-page="login" translates tp "/auth/login".
Even if I use asp-page="login" and copy the url from the console inspector and paste onto my cshtml page, a blank page is returned.
Any thoughts?
You can try to add #Html.AntiForgeryToken() into the second form.When you use the second form,it will lose a hidden input which contains the antiforgery token.
<form method="post" action="/auth/login">
#Html.AntiForgeryToken()
<input type="submit" value="submit" />
</form>
I have a simple (mostly-working) submission form:
<form action="http://127.0.0.1:3000/books" method="POST" class="addBook">
<input type="text" placeholder="Title" name="title" required>
<input type="text" placeholder="ISBN" name="isbn" required>
<button id="submitBook" type="submit" onclick="addingBooks()">Submit</button>
</form>
My form properly adds the input values to my database and it then appears in the DOM when I go back and refresh the page.
I have applied an preventDefault() function in my JavaScript code for the 'addingBooks()' function to stop it from submitting twice, but I am still unable to stop it from forwarding to the action page after submission which only shows the JSON of the submitted data.
If you need more then please let me know.
To prevent the default action of an event you'll need an event object to call preventDefault on. Some browser do in fact have a global event object but that might not be reliable.
The simplest option would be to return false from the onlick event, not from a function you call in it
<button id="submitBook" type="submit" onclick="addingBooks();return false;">Submit</button>
another simple and better solution would be to make the button be a regular button instead of a submit button and remove the preventDefault from addingBooks.
<button id="submitBook" type="button" onclick="addingBooks()">Submit</button>
another and even better solution would be to not use the onclick attribute at all, use the addEventListener function
document.getElementById('submitBook').addEventListener("click", function(e){
e.preventDefault();
//other stuff
});
This prevent enter submit,but at the moment prevent enter in inputs.
I need that enterkey work in inputs but not submit form.
<template id="form-template">
<form action="save-passport" #keypress.enter.prevent method="post" enctype="application/x-www-form-urlencoded" >
<input type="submit" v-show="loaded" v-on:click="saveForm" value="Save" />
<input type="text" required="required" name="field-11" >
<select required="required" name="field-13"><option value=""></option>
</select>
</form>
</template>
Had the same problem. Solution I did was to put the submit method on the opening form tag. Then no need for the input/button type="submit" inside the form at the bottom.
<form class="form" action="" method="POST" #submit.enter.prevent="createForm()">
Also other options available on inputs:
#keydown.enter.prevent
#keyup.enter.prevent
#submit.enter.prevent
I did it this way
first i removed vue modifiers from form tag.
second i chaged type of input from submit to button
and third this my saveForm function
saveForm:function(){
if (someCondition){
event.preventDefault();
}else{
document.forms[0].submit();
}
}
You need to use the prevent modifier. Another thing, your webpage itself must have the focus. Meaning, if you just visit the webpage, prevent won't work. But, if you click somewhere in the form, prevent will work for you.
You can still submit the form via JavaScript using something like document.forms[0].submit();
i would like to have full control over the webview control. for instance, i would like to know if it is navigating or if it has completed navigating to the desired page. I would then wish to push same data from the app like the user name and password to a field on the page that was opened by the webview.
Could you point me to some examples or tutorials please?
Thank you!
Rely on the following post for javascript injection:
Inject javascript into WebChromeClient
Now just change the underlying javascript. It is important to understand that the Javascript directly is affected by the HTML, so if the HTML is changed, the Javascript (and probably also your app, require an update).
So in case you got the following HTML:
<form action="#" autocomplete="on">
<input type="text" name="username" placeholder="Username" />
<input type="password" name="password" placeholder="Password" />
<button type="submit">Login</button>
</form>
The javascript would look like the following, to
set the username
set the password
autologin by clicking login button
$('input[name=\"username\"]').val('%#'); // 1.
$('input[name=\"password\"]').val('%#'); // 2.
$('.login').click(); // 3.
Now just load this by the webview:
public void onPageFinished(WebView view, String url)
{
String loadPasswordJS = "$('input[name=\"username\"]').val('%#'); $('input[name=\"password\"]').val('%#'); $('.login').click();";
view.loadUrl(loadPasswordJS);
}
I know how to detect which submit button was clicked when I know the name values of each of the buttons. But what if the names are dynamic or defined by another component?
For example, here I can simply check the POST data from this <form> for either alpha or bravo:
<form>
<input type="submit" name="alpha" value="Alpha">
<input type="submit" name="bravo" value="Bravo">
</form>
But that's only because I know I should be looking for those names.
Is there a best practice for handling this type of situation? (Perhaps by rendering an element <input type="hidden" name="submit-button-names" value="dynamic_name1|dynamic_name2|etc">.) I would like a solution that doesn't require JavaScript.
Presuming you have control over the JSP displaying these buttons, just prefix the button names with a string you can look for in the POSTed data. For example prepending "dynamicbutton_" to all of the names like this
<form>
<input type="submit" name="dynamicbutton_alpha" value="Alpha">
<input type="submit" name="dynamicbutton_bravo" value="Bravo">
</form>
Then in your Servlet, look for values with this prefix by calling ServletRequest.getAttributeNames()
You could write a custom tag to set the different inputs to your form based on a list of parameters you give to the tag.
You would end up with the HTML looking something like this:
<form method="POST" action="SelectColour.do">
<p>Select your favorite colour: </p>
<formTags:select name='colour' size='1' optionsList='${applicationScope.colourList}'/>
<input type="SUBMIT" value="Click here to submit">
</form>
Here's a decent guide to creating custom tags.