Linq Query to get Group By Date wise From Start and End Dates.

Question

1.00/5 (1 vote)

See more:

C#

public IEnumerable<LoanReportViewModel> GetGroupByLoansOnDailyBasis(DateTime? StartDate, DateTime? EndDate)
        {
            var circulationLoans = _circulation.All().Where(l => l.CreatedDate >= StartDate && l.CreatedDate <= EndDate).ToList()
                .GroupBy(c => new DateTime(c.CreatedDate.Year, c.CreatedDate.Month, 1)).ToDictionary(g => g.Key.Date, g => g.Count());
            
            return circulationLoans.Select(g => new LoanReportViewModel()

            {
                LoanCreatedDate = g.Key.ToString(),
                LoansCount = g.Value
            });

        }

i want to see the result like
Date = 01/06/2015, Count=2
Date = 02/06/2015, Count=3
Date = 03/06/2015, Count=10
Date = 04/06/2015, Count=5

but i am Getting only The Loan Date as
Date = 01/06/2015 and total count =20 because it is looping all the counts Inside GroupBy Function() and sum it up at the end and than it populates the Key and Value Count to Query Result. i also want to Group these Results by Weekly and Monthly Basis From the Date Ranges.

Posted 15-Jun-15 22:52pm

Qasim Sarwar

Updated 15-Jun-15 23:01pm

v4

Add a Solution

Comments

Timberbird 16-Jun-15 6:46am

Excuse me, but how do you want to see the results like "Date = 01/06/2015, Date = 02/06/2015, Date = 03/06/2015" and so on if you group loans by year and month, not year, month and day? .GroupBy(c => new DateTime(c.CreatedDate.Year, c.CreatedDate.Month, 1)) effectively groups your loans using "First day of loan's month" as a key, so loans made on 01/06/2015, 02/06/2015 and 03/06/2015 will fall under the same group with "01/06/2015" key

Qasim Sarwar 16-Jun-15 7:58am

Actually I am using code first approach in mvc I need to population through view model to pass results to crystal report so i am Assigning like this

var loanRecords = from records in _circulation.All().Where(x => x.CreatedDate >= StartDate && x.CreatedDate <= EndDate).ToList()
group records by records.CreatedDate into groupRecords
select new LoanReportViewModel
{
LoanCreatedDate = groupRecords.First().CreatedDate,
LoansCount = groupRecords.Count(),
};
return Resuts;

Still i am geting the Same Count as a total count after Adding Watch to loadRecords.

This is My ViewModel

public class LoanReportViewModel
{
public int LoansCount { get; set; }
public string LoanCreatedDate { get; set; }

}

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Jitesh Hirani · Answer 1 · 2015-06-16T01:10:00

var loanRecords = from records in _circulation.Where(x => x.CreatedDate.Date >= x.StartDate.Date && x.CreatedDate.Date <= EndDate.Date)
group records by records.CreatedDate.Date into groupRecords
select new
{
LoanDate = groupRecords.First().CreatedDate.Date,
LoanCount = groupRecords.Count()
}.ToList();

Maciej Los · Answer 2 · 2015-06-21T00:33:00

Try this:

C#

return _circulation.All()
    .Where(l => l.CreatedDate >= StartDate && l.CreatedDate <= EndDate)
    .GroupBy(c => c.CreatedDateToString("yyyy/MM/dd"))
    .Select(g => new LoanReportViewModel()
        {
            LoanCreatedDate = g.Key,
            LoansCount = g.Count()
        }).ToList();

Linq Query to get Group By Date wise From Start and End Dates.

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0