File in Upload control not persisting on Submit button in MVC - asp.net-mvc

Recently, I was asked this question:
When using a file upload control in ASP.Net MVC, why is the selected file not persisting on Submit button click? It does shows up in control when user selects it from hard drive. Other controls of that form are persisting on submit button click, but not this file upload control.
I replied it had got to with Ajax. I am new to Web technologies. Was my answer correct?

It appears, I need to place the file upload control outside of UpdatePanel of Ajax, remaining controls like textboxes, button can go inside UpdatePanel so that their validation takes place. Another option would be to use hidden field for preserving the file value

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split button outlook command add-in

I am designing a menu for an outlook add-in using Node.js
I would like that menu to behave like these SplitButton (a button that can trigger events adjacent to a dropdown menu). If you look at the splitbutton picture, It shows the paste button you see on Office Word as an exemple; if you click paste, it will paste by default but the the dropdown menu next to it has a seperate action that gives you different pasting options in the form of a dropdown menu.
I am using this the manifest found in this tutorial https://learn.microsoft.com/en-us/office/dev/add-ins/outlook/manifests , unfortunately the menu button cannot have any event attached to it, just give the dropdown menu.
A description of what I am trying to achieve can be found here https://www.codeproject.com/Articles/18447/SplitButton-a-NET-WinForm-control-Part-1, the button part and the split part can have their own actions. Is there a way to do this inside the outlook add in manifest? I am using node.js
Currently the whole button works as a dropdown.
Thank you
Currently the feature you requested, is not a part of the product. We track Outlook add-in feature requests on ourĀ user-voice page. Please add your request there. Feature requests on user-voice are considered, when we go through our planning process.

Orbeon Forms - link button

I'm new to this Orbeon forms development.
I want to know how to load or open a PDF on web browser when a link button is clicked.
I have already created a web service to load the PDF, I want to call that web service and open the PDF in a new tab of the web browser when the link button is clicked.
The Link Button in Form Builder is more like a Button than a Link: it is intended to be used to run an HTTP or database service, for instance sending the value of some fields to that service, and using the result to populate other fields, or populate a dropdown. In your case, it looks like you just need a plain link. You can create such a link with the Explanatory Text control:

jquery-mobile dialog without hash change

I am new to jquery mobile. I want to open a dialog containing external page as content. At the same time not want to change hash in url.
I have link
Open dialog
which opens the dialog but changes the hash in url. Need help, thank in advance
From official docs:
Since dialogs are typically used to support actions within a page, the
framework does not include dialogs in the hash state history tracking.
This means that dialogs will not appear in your browsing history
chronology when the Back button is clicked.
http://api.jquerymobile.com/dialog/

asp mvc file upload

I have a form in asp.net mvc 3 project with some properties (a name and some extra properties who need to be filled in).
What i also need is a file to upload in the same form.
I placed an input type "file" and that works when i use Request.File the file is ok.
But i'm also using form validation, so when my name is not filled in, it's not possible to save. That works fine, but then my file is cleared..
Someone who has a good example to use file upload in a form? (with other fields and validation)
In addition to #Neil Knight's excellent references in his answer, if you're using ajax (and you probably are or will be to leverage MVC's ability to facilitate partial page refreshes) the jquery plugin here has proved itself useful in enabling file upload without a full page navigation.

How do I create a confirmation dialog in jQuery Mobile?

I want to have a confirmation dialog (not plain javascript) show when the user clicks a button, but I'd rather have it embeded instead of referencing another page.
How do I embed a dialog for use on a jQuery Mobile page?
You have 2 options really - if you want it to popup and fill the page, you can create a JQM dialog page (even dynamicaly), and switch to it. JQM dialogs are explained more in detail here:
http://jquerymobile.com/demos/1.0b1/docs/pages/docs-dialogs.html
It is quite possible to append a new dialog to the same page (simple append it to the container above the one with data-role="page") and switch to it with $.changePage(...)
Another option, if you want it to popup "over" the existing content (modal mode from UI dialog), this plugin will do that:
http://dev.jtsage.com/jQM-SimpleDialog/
Full disclosure: I wrote the second one, so I am biased. However, it does employ a bit of option 1 above, and you are of course welcome to rip the code apart to see how it works if you'd rather roll your own.
Edit:
Another option is to use the builtin popup interface, added in the last major version (1.2.0 I think). It can be found here, and is included in the default:
http://jquerymobile.com/demos/1.2.0/docs/pages/popup/index.html

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