How to use jquery or ajax to update razor partial

2019-01-03 09:34发布

站内问答 / jQuery
1592 3 6

In a MVC partial view file, I build one Html.TextBox and two submit buttons. These two buttons will increase/decrease the Html.TextBox value once clicked. The Html.TextBox displayed value will change accordingly.However, once I need to update the #refTable div based on the new value after click. The page or section never updated. Codes are below, where some comments are added for explanation purpose. Thanks for your help.

//******* cshtml file **********//

<body>
</body>

<input type="submit" value="PrevY" name="chgYr2" id="pY" />
@{
    var tempItem3 = Model.First(); // just give the first entry from a database, works.
    if (ViewData["curSel"] == null)
    {
    @Html.TextBox("yearSelect3", Convert.ToDateTime(tempItem3.Holiday_date).Year.ToString());  
    ViewBag.selYear = Convert.ToDateTime(tempItem3.Holiday_date).Year; // just initial value, works
    ViewData["curSel"] = Convert.ToDateTime(tempItem3.Holiday_date).Year;
    }
    else
    {
    @Html.TextBox("yearSelect3", ViewData["curSel"].ToString());
    } 
}
<input type="submit" value="NextY" name="chgYr2" id="nY" />


<script type="text/javascript">
    $(document).ready(function () {
        $(document).on("click", "#nY", function () {
            var val = $('#yearSelect3').val();
            $('#yearSelect3').val((val * 1) + 1);
            var dataToSend = {
                id: ((val * 1) + 1)
            }
            // add some jquery or ajax codes to update the #refTable div
            // also ViewBag.selYear need to be updated as ((val * 1) + 1)
            // like:   ViewBag.selYear = ((val * 1) + 1);
            // any similar temp variable is fine
        });

        });
        $(document).on("click", "#pY", function () {
            var val = $('#yearSelect3').val();
            $('#yearSelect3').val((val * 1) - 1);
            var dataToSend = {
                id: ((val * 1) - 1)
            }

        });
    });
</script>



<span style="float: right"><a href="/">Set Holiday Calender for 2013</a></span>
<span id="btnAddHoliday">@Html.ActionLink("Add Holiday", "Create", null, new { id = "addHilBtn" })</span>

<div id="refTable">
    <table class="tblHoliday" style="width: 100%;">
            <th>
                Holiday
            </th>
            <th>
                Dates
            </th>
            <th>Modify</th>
            <th>Delete</th>
        </tr>

        @foreach (var item in Model)
        {

            if (    Convert.ToDateTime(item.Holiday_date).Year == ViewBag.selYear)
            // if the ViewBag.selYear is hard code, this selection "works"
            {
            <tr>                
                <td>
                    @Html.DisplayFor(modelItem => item.Holiday_Name)
                </td>               
                <td>
                    @item.Holiday_date.Value.ToString("MM/dd/yyyy")
                </td>
                <td>
                    @Html.ActionLink("Edit", "Edit", new {  })
                </td>
                <td>
                    @Html.ActionLink("Delete", "Delete", new {  })
                </td>
            </tr>
            }
        }

    </table>
</div>

3条回答
何必那么认真
2楼-- · 2019-01-03 10:07

You'll need AJAX if you want to update a part of your page without reloading the entire page.

main cshtml view

<div id="refTable">
     <!-- partial view content will be inserted here -->
</div>

@Html.TextBox("yearSelect3", Convert.ToDateTime(tempItem3.Holiday_date).Year.ToString());
<button id="pY">PrevY</button>

<script>
    $(document).ready(function() {
        $("#pY").on("click", function() {
            var val = $('#yearSelect3').val();
            $.ajax({
                url: "/Holiday/Calendar",
                type: "GET",
                data: { year: ((val * 1) + 1) }
            })
            .done(function(partialViewResult) {
                $("#refTable").html(partialViewResult);
            });
        });
    });
</script>

You'll need to add the fields I have omitted. I've used a <button> instead of submit buttons because you don't have a form (I don't see one in your markup) and you just need them to trigger javascript on the client side.

The HolidayPartialView gets rendered into html and the jquery done callback inserts that html fragment into the refTable div.

HolidayController Update action

[HttpGet]
public ActionResult Calendar(int year)
{
    var dates = new List<DateTime>() { /* values based on year */ };
    HolidayViewModel model = new HolidayViewModel {
        Dates = dates
    };
    return PartialView("HolidayPartialView", model);
}

This controller action takes the year parameter and returns a list of dates using a strongly-typed view model instead of the ViewBag.

view model

public class HolidayViewModel
{
    IEnumerable<DateTime> Dates { get; set; }
}

HolidayPartialView.csthml

@model Your.Namespace.HolidayViewModel;

<table class="tblHoliday">
    @foreach(var date in Model.Dates)
    {
        <tr><td>@date.ToString("MM/dd/yyyy")</td></tr>
    }
</table>

This is the stuff that gets inserted into your div.

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三岁会撩人
3楼-- · 2019-01-03 10:09

You can also use Url.Action for the path instead like so: 

$.ajax({
        url: "@Url.Action("Holiday", "Calendar", new { area = "", year= (val * 1) + 1 })",                
        type: "GET",           
        success: function (partialViewResult) {            
            $("#refTable").html(partialViewResult);
        }
    });
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神经病院院长
4楼-- · 2019-01-03 10:16

The main concept of partial view is returning the HTML code rather than going to the partial view it self.

[HttpGet]
public ActionResult Calendar(int year)
{
    var dates = new List<DateTime>() { /* values based on year */ };
    HolidayViewModel model = new HolidayViewModel {
        Dates = dates
    };
    return PartialView("HolidayPartialView", model);
}

this action return the HTML code of the partial view ("HolidayPartialView").

To refresh partial view replace the existing item with the new filtered item using the jQuery below.

$.ajax({
                url: "/Holiday/Calendar",
                type: "GET",
                data: { year: ((val * 1) + 1) }
            })
            .done(function(partialViewResult) {
                $("#refTable").html(partialViewResult);
            });
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