希望得到代码的帮助。 我想在一个条形图上显示我的数据，我能够做但我想更专业地做这个和在linq的组，但我无法这样做。 我正在使用Genetella Admin Layout模板来绘制图形。 我在控制器部分的代码如下
public ActionResult Home()
{
int jan = 0,feb = 0,mar = 0,apr = 0,may = 0,jun = 0,jul = 0 ,aug = 0 ,sep = 0,oct = 0 ,nov = 0,dec = 0;
ViewData["Freetrialcompanies"] = admin.getAllCompanies();
List<string> month = new List<string>();
foreach ( var cmpMonth in ViewData["Freetrialcompanies"] as IEnumerable<IntuitiveCrm.ViewModels.CompanyMasterViewModel>)
{
var mth = DateTimeOffset.Parse((cmpMonth.CreatedDate).ToString()).ToString("MMMM");
month.Add(mth);
switch (mth)
{
case "January":
jan = jan + 1;
var Janmth = jan;
if(Janmth != 0)
{
ViewData["jan"] = Janmth;
}
else
{
ViewData["jan"] = 0;
}
break;
case "February":
feb = feb + 1;
var Febmth = feb;
if (Febmth != 0)
{
ViewData["feb"] = Febmth;
}
else
{
ViewData["feb"] = 0;
}
break;
case "March":
mar = mar + 1;
var Marmth = mar;
if (Marmth != 0)
{
ViewData["mar"] = Marmth;
}
else
{
ViewData["mar"] = 0;
}
break;
case "April":
apr = apr + 1;
var Aprmth = apr;
if (Aprmth != 0)
{
ViewData["apr"] = Aprmth;
}
else
{
ViewData["apr"] = 0;
}
break;
case "May":
may = may + 1;
var Maymth = may;
if (Maymth != 0)
{
ViewData["may"] = Maymth;
}
else
{
ViewData["may"] = 0;
}
break;
case "June":
jun = jun + 1;
var Junmth = jun;
if (Junmth != 0)
{
ViewData["jun"] = Junmth;
}
else
{
ViewData["jun"] = 0;
}
break;
case "July":
jul = jul + 1;
var Julmth = jul;
if (Julmth != 0)
{
ViewData["jul"] = Julmth;
}
else
{
ViewData["jul"] = 0;
}
break;
case "August":
aug = aug + 1;
var Augmth = aug;
if (Augmth != 0)
{
ViewData["aug"] = Augmth;
}
else
{
ViewData["aug"] = 0;
}
break;
case "September":
sep = sep + 1;
var Sepmth = sep;
if (Sepmth != 0)
{
ViewData["sep"] = Sepmth;
}
else
{
ViewData["sep"] = 0;
}
break;
case "October":
oct = oct + 1;
var Octmth = oct;
if (Octmth != 0)
{
ViewData["oct"] = Octmth;
}
else
{
ViewData["oct"] = 0;
}
break;
case "November":
nov = nov + 1;
var Novmth = nov;
if (Novmth != 0)
{
ViewData["nov"] = Novmth;
}
else
{
ViewData["nov"] = 0;
}
break;
case "December":
dec = dec + 1;
var Decmth = dec;
if (Decmth != 0)
{
ViewData["dec"] = Decmth;
}
else
{
ViewData["dec"] = 0;
}
break;
}
}
ViewData["Mnth"] = month;
return View();
}
在这里，我从创建日期获取月份名称，该日期名称存储在日期时间偏移格式中＆＃34; mth＆＃34;并将其分开来计算。
我的cs文件代码如下所示admin.getAllCompanies（）;
public List<CompanyMasterViewModel> getAllCompanies()
{
var taskData = (from t in Comp.GetAll()
join p in plan.GetAll()
on t.PlanId equals p.PlanId
join f in freeTrial.GetAll()
on t.CompanyId equals f.CompanyId
where t.Status == 1
select new CompanyMasterViewModel
{
CompanyName = t.CompanyName,
PlanName = p.PlanName,
Email = t.Email,
CreatedDate = f.CreatedDate,
EndDate = f.EndDate,
Status = t.Status,
}).ToList<CompanyMasterViewModel>();
return taskData;
}
有了这个我生成以下条形图 enter image description here
任何人都可以帮助我更好地使用这些代码以及如何编写linq查询，这样我就可以按月订购createdate（它存储在datetimeoffset中）。
谢谢。
答案 0 :(得分：0)
我可以想象几种不同的解决方案，但您可以尝试以下方法。我不知道你是否在更多的地方使用library(dplyr)
library(lubridate)
# Setting up a data.frame
df_stackOverflow <- data.frame(ID = c(1,1,
2,2,2,2,
3,3,
4,4,
5,5,5,
6,6,6),
time = c("2016-11-11 10:25:07", "2016-11-11 11:13:09",
"2016-11-16 21:13:28", "2016-11-29 19:18:58", "2016-12-01 18:44:41", "2016-12-04 12:46:44",
"2016-12-26 20:49:07", "2016-12-30 11:41:51",
"2016-11-25 10:25:52", "2016-12-26 22:04:36",
"2016-12-07 21:27:53", "2016-12-07 21:52:58", "2016-12-09 18:32:23",
"2016-11-25 14:10:24", "2016-11-25 20:06:43", "2016-11-25 21:07:33"),
Factor = c("A","B",
"C","B","B","C",
"B","B",
"A","D",
"D","D","D",
"B","E","B"))
# My try to save a data.frame
# I want to save all ros where the previous value for that ID was "B".
# And also the the time difference between this and the previous value need to be under a certain threshold.
# This threshold will be looped for different values
df_res <- list()
for(i in 1:15) {
df_res[[i]] <- df_stackOverflow %>%
group_by(ID) %>%
filter(lag(Factor) == "B" & as.period(interval(as.POSIXct(time), as.POSIXct(lag(time))), units = "day") < days(i))
}
方法，但我认为是这样的，所以我不打算改变这种方法。您可以在业务层中添加另一种方法，如下所示：
getAllCompanies()CompanyCountView类是我为保持整洁而创建的新视图模型：
public IEnumerable<CompanyCountView> companyCountByMonth()
{
List<CompanyMasterViewModel> companies = this.getAllCompanies();
ILookup<int, Company> byMonths = companies.ToLookup(key => key.CreatedDate.Month);
for (var i = 1; i <= 12; i++)
{
yield return new CompanyCountView
{
Date = new DateTime(2016, i, 1),
Count = months[i].Count()
};
}
}
，您只需调用此函数即可。我建议在视图中使用视图模型，并将ViewData限制为最小值。这对维护来说更好。
public class CompanyCountView
{
public DateTime Date { get; set; }
public int Count { get; set; }
}
在视图中，您需要显示3个字母的缩写。只需使用：
public ActionResult Home()
{
IEnumerable<CompanyCountView> model = admin.companyCountByMonth();
return View(model);
}
我不确定你是怎么处理多年的。如果图表应该在一年或几个月内显示所有条目的月份 - 某种统计数据。如果它只是某一年，只需将我的硬编码值“2016”替换为您需要的年份。
如果是另一种情况，并且您不想创建DateTime类型的实例只是为了存储一个月，或者您需要考虑本地化。然后你可以使用略有不同的方法。您只需要创建枚举
@item.Date.ToString("MMM")
并更新模型视图public enum Months {
Jan = 1,
Feb = 2,
Mar = 3
// etc.
}
：
CompanyCountview和public class CompanyCountView
{
public Months Date { get; set; }
public int Count { get; set; }
}
函数：
companyCountByMonth()最后一个注释是关于public IEnumerable<CompanyCountView> companyCountByMonth()
{
List<CompanyMasterViewModel> companies = this.getAllCompanies();
ILookup<int, Company> byMonths = companies.ToLookup(key => key.CreatedDate.Month);
for (var i = 1; i <= 12; i++)
{
yield return new CompanyCountView
{
Date = (Months)i,
Count = months[i].Count()
};
}
}
功能。如果仅为此特定视图创建此函数，我会考虑在将所有内容加载到内存之前对查询执行getAllCompanies()。但在这种情况下，我的解决方案必须进行调整:)我希望你能得到一个如何简化它的要点。