如何在ASP.NET MVC中处理同一表单上的编辑和删除按钮？

Question

Consider the following markup:

<h2>Edit SAS Program</h2>
@using (Html.BeginForm("Edit", "SasProgram", FormMethod.Post))
{
    <label for="Name">Name</label>
    @Html.TextBoxFor(model => model.Name)

    using (Html.BeginForm("Delete", "SasProgram", FormMethod.Post))
    {
        <input type="submit" class="button" value="Delete" />
    }
    <input type="submit" class="button" value="Save Changes" />
}

I'd like to have the Delete button on the same view as the Edit . However, it's not letting me have nested forms. What is the appropriate way to handle this situation?

I tried leveraging this answer, How to handle nested forms in ASP.NET MVC , but it's a broken link now.

Answer 1

I would use different values for button name in the same form:

@using (Html.BeginForm("Edit", "SasProgram", FormMethod.Post))
{
    <label for="Name">Name</label>
    @Html.TextBoxFor(model => model.Name)

    <button name="action" value="delete">Delete</button>
    <button name="action" value="save">Save Changes</button>
}

and then switch in controller:

[HttpPost]
public ActionResult Edit( SomeModel model, string action )
{
    switch( action ) {
        case "delete":
            // delete action
            break;
        case "save":
            // save action
            break;
    }
}

The code is written from memory but it works in production. Note that buttons are of default type - submit.

Answer 2

The best and easiest way would be to use two forms but don't nest them:

<h2>Edit SAS Program</h2>
@using (Html.BeginForm("Edit", "SasProgram", FormMethod.Post))
{
    <label for="Name">Name</label>
    @Html.TextBoxFor(model => model.Name)

    <input type="submit" class="button" value="Save Changes" />
}

@using (Html.BeginForm("Delete", "SasProgram", FormMethod.Post))
{
    <input type="submit" class="button" value="Delete" />
}

This way you have:

• Two separate forms
• No GET requests
• The delete button below the edit button, which makes more sense when you're on a view that allows you to edit something.

Answer 3

First of all. Every modification request should be use the post method.
I make some R&D and build the basics of a multi submit button handler in a wiki A clean solution to use multiple submit button in ASP.NET MVC .
I think it could solve your problem.

Answer 4

First, you cannot nest <form> element. The specification doesn't allow it. Since you are using the MVC pattern I have two options that came to my mind:

1. You can retain the save button as the submit button of the form, and make the delete button a HTML link. Then the delete button will target to a different route, it could be something like: GET /program/delete/{id} .

2. You can have two buttons inside the same form, then with JavaScript after clicking one of the buttons you will change the action attribute of the form.

Update

There is a third option, that is more clean: using two submit buttons with same name attribute and different values .

Your form will have two buttons:

public ActionResult MyAction(string submitButton) {
    switch (submitButton) {
        case "save":
            // ...
        case "delete":
            // ...
    }
}

For more details check this answer: https://stackoverflow.com/a/443047/439427

Answer 5

You can also use html 5 feature to target a form from an input button. Below I have created both a delete and save form and have the submit buttons outside of the forms but targeting them via the form attribute.

I think most browsers support this except IE.

No javascript required.

@using (Html.BeginForm("Edit", "SasProgram", FormMethod.Post, new { id = "editForm" }))
{
    <label for="Name">Name</label>
    @Html.TextBoxFor(model => model.Name)
}

@using (Html.BeginForm("Delete", "SasProgram", FormMethod.Post, new { id = "deleteForm" }))
{
    <input type="submit" class="button" value="Delete" />
}

<input type="submit" class="button" value="Save" form="editForm"/>
<input type="submit" class="button" value="Delete" form="deleteForm" />

This allows for a nice button layout without any fancy javascript or css styling.

Answer 6

The OLD way to do this but still applicable is to have one form tag and change the action with multiple submit buttons.

<input class="btn btn-default" type="submit" value="Save" />
<input class="btn btn-default" type="submit" value="Delete" onclick="this.form.action='/SasProgram/delete/@Model.Id';" />

Answer 7

Edit : Here's how to do it with ajax using an HttpPost.

//
// POST: /Divisions/Delete
[HttpPost, ActionName("Delete"), Authorize]
public ActionResult DeleteConfirmed(int id)
{
    Division division = _db.Divisions.Single(x => x.DivisionId == id);

    string errorMessage;
    if (DbRelationEnforcer.CanDelete(_db, division, out errorMessage))
    {
        division.SetDeleted(User.Identity.Name);
        _db.SaveChanges();
        return Json(new JsonResponseCreatePartial { Success = true }, JsonRequestBehavior.AllowGet);
    }

    return Json(new JsonResponseCreatePartial { Success = false, Message = errorMessage }, JsonRequestBehavior.AllowGet);
}

Then, on the view, you must use the <input type="submit">Save changes</input> to save your changes (within the form), and a simple link/button to delete, like this:

<h2>Edit SAS Program</h2>
@using (Html.BeginForm("Edit", "SasProgram", FormMethod.Post))
{
    <label for="Name">Name</label>
    @Html.TextBoxFor(model => model.Name)

    <input id='delete-btn' type="button" class="button" value="Delete" />
    <input type="submit" class="button" value="Save Changes" />
}

Finally, you have to use JS to post to your action from the view, when the user clicks on Delete.

<script type='text/javascript'>
    $(function() {
        $("input#delete-btn").click(function(){
            $.post('@Url.Action("Delete")', '@Model.Id', function(data) {
                if(data.Success) {
                    ' ... handle the success case
                } else {
                    ' ... error management
                }
            });
        });
    });
</script>

This will work, but in order to have a better UX, it would be preferable to have the Delete button from the Index/list view, and using a JQuery UI dialog to confirm before doing the ajax post. This will skip having to load the Edit page if/when you want to delete multiple items one after the other.