我正在使用ASP.NET MVC 3。
我有文本框,我有一个控件,显示这些文本框总和的计算值。我使用jQuery来计算这些结果。
我正在努力回发,然后总数被清除,我不知道它如何保留计算结果。所以我认为如果我的视图模型中有一个属性,那么它将保留回发后的值。我尝试使用Html.TextboxFor作为总数,这似乎在我点击提交按钮时保持该值。但我不希望它成为文本框,只是文本,但我仍然需要将它绑定到视图模型。
我的观点模型的一部分:
public class EditGrantApplicationViewModel
{
public decimal? GrossMonthlySalary { get; set; }
public decimal? SpouseGrossMonthlySalary { get; set; }
public decimal? AdditionalIncome { get; set; }
public decimal? ChildSupportIncome { get; set; }
public decimal? TotalMonthlyIncome
{
get { return totalMonthlyIncome; }
set
{
totalMonthlyIncome = GrossMonthlySalary +
SpouseGrossMonthlySalary +
AdditionalIncome +
ChildSupportIncome;
}
}
}
我的部分HTML:
<td><label>Gross Monthly Salary:</label> <span class="red">**</span></td>
<td>@Html.TextBoxFor(x => x.GrossMonthlySalary, new { @class = "income", maxlength = "10", size = "20" })
@Html.ValidationMessageFor(x => x.GrossMonthlySalary)
</td>
<td><label>Spouse Gross Monthly Salary:</label></td>
<td>@Html.TextBoxFor(x => x.SpouseGrossMonthlySalary, new { @class = "income", maxlength = "10", size = "20" })
@Html.ValidationMessageFor(x => x.SpouseGrossMonthlySalary)
</td>
<td><label>Any Additional Income:</label></td>
<td>@Html.TextBoxFor(x => x.AdditionalIncome, new { @class = "income", maxlength = "10", size = "20" })
@Html.ValidationMessageFor(x => x.AdditionalIncome)
</td>
<td><label>Child Support Received:</label></td>
<td>@Html.TextBoxFor(x => x.ChildSupportIncome, new { @class = "income", maxlength = "10", size = "20" })
@Html.ValidationMessageFor(x => x.ChildSupportIncome)
</td>
<td><label class="total">Total Monthly Income:</label></td>
<td>
<label id="TotMonthlyIncome" class="total-amount">@Html.DisplayTextFor(x => x.TotalMonthlyIncome)</label>
@Html.HiddenFor(x => x.TotalMonthlyIncome)
</td>
增加的jQuery:
$('.income').keyup(function () {
var incomes = $('.income'),
totDisplay = $('#TotMonthlyIncome'),
totalDisplay = $('#TotalMonthlyIncome'),
totalVal = 0;
incomes.each(function () {
var matches = null;
// find the number to add to total
matches = $(this).val().match(/\d+/);
// not bothering with the regex on totalVal because we set it
totalVal = (matches !== null ? parseInt(matches[0], 10) : 0) + parseInt(totalVal, 10);
});
totalVal = totalVal === 0 ? '' : totalVal;
totDisplay.text(totalVal);
$('#TotalMonthlyIncome').val(totalVal);
});
当我在文本框中输入值时,它会正确计算。如果我在4个文本框中键入值,则会正确计算。如果我在一个文本框中输入一个值,则TotalMonthlyIncome为null,但是当所有4个文本框中都有值时,它具有文本框添加的值。它为什么这样做?这是我的代码中不对的东西吗?
答案 0 :(得分:1)
您可以创建隐藏的输入并将其与viewmodel属性绑定。
<%: Html.HiddenFor(m => m.CalculatedValue) %>
<div id="DisplayCalculatedValue"><%: Model.CalculatedValue %></div>
<script type="text/javascript">
var value = // calculate it
$('#CalculatedValue').val(value);
$('#DisplayCalculatedValue').html(value);
</script>
答案 1 :(得分:0)
在TotalMonthlyIncome
属性的setter中,您必须考虑到您的小数可能为null:
private decimal? totalMonthlyIncome;
public decimal? TotalMonthlyIncome
{
get { return totalMonthlyIncome; }
set
{
totalMonthlyIncome =
(GrossMonthlySalary.HasValue ? GrossMonthlySalary.Value : 0m) +
(SpouseGrossMonthlySalary.HasValue ? SpouseGrossMonthlySalary.Value : 0m) +
(AdditionalIncome.HasValue ? AdditionalIncome.Value : 0m) +
(ChildSupportIncome.HasValue ? ChildSupportIncome.Value : 0m);
}
}