Asp.net mvc 2 无法隐式转换类型';双倍?';至';双倍';
我正在使用asp.net MVC2,下面的代码行出现错误Asp.net mvc 2 无法隐式转换类型';双倍?';至';双倍';,asp.net-mvc-2,Asp.net Mvc 2,我正在使用asp.net MVC2,下面的代码行出现错误 <% double RunningTotal = 0; %> <%foreach (var item in Model) {%> <%var allowedHours = item.tblPerson.tblPersonAllowedHours.Where(x=>x.Semester == item.Semester).Sum(x=>x.AllowedHoursPerWe
<% double RunningTotal = 0; %>
<%foreach (var item in Model)
{%>
<%var allowedHours = item.tblPerson.tblPersonAllowedHours.Where(x=>x.Semester == item.Semester).Sum(x=>x.AllowedHoursPerWeek); %>
<tr>
<td><%: item.Semester %></td>
<td><%: allowedHours.ToString() %></td>
<td><%: item.tblPerson.tblCourseWantedHours.Where(x => x.Semester == item.Semester).Sum(x => x.WantedHoursPerWeek+x.UL+x.UT) %></td>
<td><%: item.tblPerson.tblCourseWantedHours.Where(x => x.Semester == item.Semester).Sum(x => x.WantedHoursPerWeek+x.UL+x.UT) - allowedHours %></td>
<%: RunningTotal += (item.tblPerson.tblCourseWantedHours.Where(x => x.Semester == item.Semester).Sum(x => x.WantedHoursPerWeek + x.UL + x.UT) - allowedHours) %>
<td></td>
你知道我在这里遗漏了什么吗?看起来你试图添加的东西之一可能是一个
可空的
要从double?
转到double
,您需要执行以下操作
double? nullableDouble = 3.0;
if (nullableDouble.HasValue)
double notNullableDouble = nullableDouble.Value;
关于Nullables的更多信息:看起来您试图添加的内容之一可能是Nullables
要从double?
转到double
,您需要执行以下操作
double? nullableDouble = 3.0;
if (nullableDouble.HasValue)
double notNullableDouble = nullableDouble.Value;
有关Nullables的详细信息:
double? nullableDouble = 3.0;
if (nullableDouble.HasValue)
double notNullableDouble = nullableDouble.Value;