I'm building a simple forum where the SQL query changes whats pulled out by what link is clicked and what I thought I could do was just set a varaible to the value of the topic name and it would give each row their own variable value, but it overwrites it everytime it loops through the forEach and only ever pulls out data for the last row it outputs, but with the id of the <a> it sets the value to the right row in the table.
Is there anyway I can set the variable to the value of the <a> id or would I have to populate an array full and set the varaible to the value of the next element of the array
<td><a id="${row.topic_name}" href="ViewPosts.jsp" onclick='<c:set var="post" value="" scope="application"></c:set>'><c:out value="${row.topic_name}"></c:out></a></td>
A bit of a roundabout solution didn't take too much code though, used javascript to get the id passed it to a hidden input and got the javascript to auto submit to a jsp file that forwarded the parameter I needed onto the jsp page that called the query.
Related
i am currently working on to display the value in textboxes after adding row to the table. I am new to angular and seems i could not find the solution. At the moment, everytime i click on the Add button, the table will add new row but somehow the value that i have entered previously are gone. I need to make the value stays in the textbox every time the user adds new row.
Here is the source code that i have done:
https://stackblitz.com/edit/angular-hxduqp
Thank you.
That happens when you have multiple inputs with the same name.
One way to fix it is by giving your input names a suffix of your iterator i:
<input ... [name]="'from' + i" ...>
Here is your StackBlitz corrected:
https://stackblitz.com/edit/angular-bgdgpr?file=src/app/app.component.html
You just remove the name from the form control if not required else you need to provide the unique name to each control.
Working copy is here - https://stackblitz.com/edit/angular-gpq9nc
I am new to jsp in my jsp i have
href="${mainUrl}/userdata?page=1" target="_blank">Next On First Page
href="${mainUrl}/userdata?page=1" target="_blank">Next On 2nd Page
href="${mainUrl}/userdata?page=1" target="_blank">Next On 3rd Page
href="${mainUrl}/userdata?page=1" target="_blank">Next On 4rth Page
However , i want this link on every page
Requirement :
Next
So i applied for-each loop on tag
<c:forEach items="${i}" var="i">
Next
</c:forEach>
${i} : Its an attribute from my controller with int i=0;
However , compiler is saying it cant interate on "i"
How can i fix that? I am doing Pagination
Assuming userdata is your controller. Make the controller set the next page's id, not the current one's, and name it something better than i, like nextPageID.
So in the controller, take the current id received in the request parameter page, if any, and add one to it, and set it in the request attribute nextPageID. I guess if no page id was received, the next id would 2. Then in your JSP:
Next
Because if you are adding one in the JSP, how do you know this isn't the last page? Keep the logic part in the controller. The controller will presumably know which number is the last page.
BTW, you obviously cannot iterate on a simple int; Iteration means traversing over an array or list.
Alright, so I'm pretty new to Spring, but I was asked to resolve a bug. So in our application, we have a page that queries a database based on an id. However, not all entries are unique to the id. The id and date pair, on the other hand, do define unique entries.
So this page takes in an id. If there is only a single entry related to this id, everything works fine. However, if there are multiple entries, the page displays a radio button selection of the various dates that pertain to that id. We use something like:
< form:radiobutton id="loadDate" path="loadDate" value="${date}" label="${date}" />
Later on the same page, we want to display the data for that option. As part of it, we display the date of that selection:
< form:input id="aiLoadDate" path="loadDate" maxlength="22" size="22" class="readonly" readonly="true"/>
The problem is that when this happens, the variable (or bean? I'm not quite sure about Spring yet..) loadDate (a string) ends up being the same date twice, seperated with a comma. I'm guessing the problem here is the "path="loadDate"" that is common to both lines.
Instead of appending the date to the already existing one like a csv, I'd like it to overwrite the current entry intead. Is there a way to do this?
Spring is not the direct cause of your problem. When the elements of an HTML form are submitted, each element will appear in the request as a name=value pair. If two or more elements in the form have the same name (not id, name attribute) then those elements appear in the request as name=value,value (with one value per element with a duplicated name).
Option 1: stop using an input as a display element. Just display the date in a span (or div or paragraph or what ever). If you want the look of an input box (border, etc.) use CSS to create a class that has the look you want and attach the class to the span (or div or paragraph, etc) in which you display the date.
Option2: continue using an input as a display element. Disabled input elements are not added to the request when the form is submitted. in the form:imput set disabled="true".
Currently I am using UiService to create a form and I uses ListBox, from what I understand to pass a value via handler will be something like e.parameter.[Name of ListBox] to access the selected item.
Does anyone know is it possible to use like app.getElementById([Name of ListBox]) to access the selected item. The reason I am using this method is because my list of ListBox-es are dynamic.
I spent some time looking for this answer as well, but finally I tried one idea and it worked.
You can use e.parameter as an array so you can these two will give the same:
e.parameter.LIST_BOX_NAME
and
e.parameter['LIST_BOX_NAME']
So in the second sample any dynamic list box ID can be used. I use same handler for all added dropdown list and have this code to check what dropdown was changed and what value it has now:
if (e.parameter[e.parameter.source] == 'a'){
To change the content of the listBox you can use app.getElementById('ID of the listBox'), from there you can clear() and addItems again but you cannot read the listItems.
When I need to do this I usually store the list of items somewhere else, in a place that I can read anytime, for example the list of items can be stored as a string in the listBox tag itself so I have all items at hand to repopulate the listBox after I have clear it.
I have a simple HTML page with an Unordered list. Is it possible to have an input field where you could add more to the list and it would be saved after you submitted it. What I would like to add would be the content inside of an <li> tag as well as the <li> tags themselves.
Thanks,
Here is a jsfiddle with a demo of what I think you want to achieve: http://jsfiddle.net/mvJNq/25/
Note that I can not answer as to how you should do this on the server, as that depends on how your serverside code, database etc is set up. However, if all you want is to display it as HTML and not have it saved as the user navigates away, you won't need the Submit button at all - then you just need the "Add" functionality.
Yes, it is possible - no, it will not be pretty. Here is what you would do:
create your base form with any default list items/inputs
use jQuery/JavaScript to bind an event handler to a button that you click when you want to add another item (alternatively, you could skip this step and just have another item appear by default)
on your event (be it checking that all input boxes have user-entered text, or the click event in step two) add another list item using jQuery.append(...)
ensure that you have a hidden input field to be used as a "counter" to keep track of the total number of list items and increment the value of this counter each time you add a new list item (note: you may need to use the ParseInt() method, depending on how you design the code for this field)
the page that is receiving the form's inputs should first read the hidden field so that it knows how many items to add, and then you should loop through the items (for or while loop) to add them correctly
Note: I don't know what Server-Side language you are using to handle receiving the form so step 5 is a fairly generic and universally viable option
Sure, it's possible.
The complexity of this comes in when you want to "save" the items. If the user leaves the page and comes back later will that data be available? If so, you will need a database like mySQL or similar. The li tags can be stored as well, but why?
If you just need that information available in that session you can store in a JavaScript variable and have it loop through the variable and spit them out as <li>'s
If you did want to use an add button instead of submit:
$('#addButton').click(function(){
var savedContent = $('#input').val();
}
To create + insert the <li>you can use javascript to create the element and append it to the ul. If you have more than one ul change the index:
var content = document.createElement('li');
content.innerText = savedContent;
document.getElementsByTagName('ul')[0].appendChild(content);