无法在链接表

时间:2018-03-06 17:23:45

标签: c# asp.net asp.net-mvc datatables

我试图获取数据表中列的总和,其中数据的来源来自与数据表使用的API不同的表。

数据表正在使用“购买”表中的数据,该表与“手机”表相关,其中存在“SalesPoints”数据,您可以从下面的代码段中看到。我想得到SalesPoints列的总和。

<script>
$(document).ready(function () {
    var table = $("#purchases").DataTable({

        rowReorder: {
            selector: 'td:nth-child(2)'
        },


        ajax: {
            url: "/api/purchases",
            dataSrc: ""
        },

        columns: [
            {
                data: "customer.name"
            },
            {
                data: "handset.name"
            },
            {
                data: "handset.salesPoints"
            },
            {
                data: "datePurchased"
            }
        ],
        responsive: true
    });

});

为了得到这笔钱,我在控制器中包含了以下代码:

private void ComputeBySalesSalesID(DataSet dataSet)
{
    // Presumes a DataTable named "purchases" that has a column named "handset.salesPoints."
    DataTable table;
    table = dataSet.Tables["purchases"];

    // Declare an object variable.
    object sumObject;
   sumObject = table.Compute("SUM([handset.salesPoints])", "");

      ViewBag.TotalValue = sumObject.ToString();
}

要显示此总和,我在视图中包含了“@ Html.Label((String)ViewBag.TotalValue)”;当我运行程序时,这个标签会抛出一个异常,说它不能为空。

我会非常感谢对此的任何见解,因为它阻碍了我很快就会完成一个项目。谢谢!

编辑:查看代码

@model IEnumerable<SmashingTargets.Models.Purchase>
@{
ViewBag.Title = "List";
Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Sales</h2>



<p>
@Html.ActionLink("My Profile", "Profiles", "Sales", null, new { @class = 
"btn btn-primary" })
</p>

@*Display Sum total*@
<div class="form-group">
@Html.Label((String)ViewBag.TotalValue)
</div>

<table id="purchases" class="table table-striped table-bordered table-hover     
table-responsive">
<thead>
    <tr>
        <th>Customer</th>
        <th>Handset</th>           
        <th>Points Earned</th>
        <th>Date Purchased</th>
    </tr>
</thead>

<tbody>


</tbody>

</table>

0 个答案:

没有答案