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I have a 2 Dimensional string array(5*2) like this:
string[,] data= new string[5, 2] {{"F1","LINK1"},
{"F1","LINK2"},
{"F2","LINK3"},
{"F3","LINK4"},
{"F3","LINK5"}};
i want to group and merge the values into new array.
Output :
{"F1","LINK1,LINK2"},
{"F2","LINK3"},
{"F3","LINK4,LINK5"}
The output array 3*2.
Something like that:
string[,] data= new string[5, 2] {{"F1","LINK1"},
{"F1","LINK2"},
{"F2","LINK3"},
{"F3","LINK4"},
{"F3","LINK5"}};
var items = Enumerable.Range(0, data.GetLength(0))
.Select(n => new {Key = data[n, 0], Link = data[n, 1]});
var query =
from i in items
group i by i.Key
into g
select new []
{
g.Key,
string.Join(",", g.Select(x => x.Link))
};
var result = query.ToArray();
Related
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Please I need to implement distinct in a.CompanyName but it doesn't work. What do I need to do ?
try
{
var listCompany = company.CompanyList();
companyList1.DataSource = listCompany.Select(a => new { a.CompanyName, a.CompanyId }).Distinct();
companyList1.DataTextField = "CompanyName";
companyList1.DataValueField = "CompanyId";
companyList1.DataBind();
}
catch (Exception)
{
throw;
}
You can use with .GroupBy()
Groups the elements of a sequence.
companyList1.DataSource = listCompany
.GroupBy(x => x.CompanyName)
.Select(a => new
{ CompanyName = a.First().CompanyName, CompanyId = a.First().CompanyId });
Above query will group your result by company name and then will select CompanyName and CompanyId of first record
Try out online
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I have a list string which has values like below, could you please let me know how to split the list by every 2 character and insert a comma separated and assign the final list to another list.
var list1 = new List<string>() {"DVMNKL"};
var list2 = new List<string>() {"DV","MN","KL"};
Some time list1 can have only 2 character, at that time I should not split, I have to just assign to list2
You can use System.Linq to manage that.
int splitByCount = 2;
string s = new List<string> { "DVMNLS", "DVMNLS" };
var split = s.SelectMant(c => c) //flatten the list of strings to IEnumerable<char>
.Select((c, index) => new {c, index})
.GroupBy(x => x.index/splitByCount)
.Select(group => group.Select(elem => elem.c))
.Select(chars => new string(chars.ToArray()));
Console.WriteLine(string.Join(",", split));
the output
DV,MN,KL,DV,MN,KL
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I have many date in one variable like:
var date = hfAllDates.Value.Split('#');
there are four date(01/01/2016,22/01/2016,18/01/2016,05/01/2016) in date variable .
how to sort date.
Thanks
add namespace using System.Linq;
and use LINQ Query
in ascending order
var orderedDateList = date.OrderBy(x => DateTime.Parse(x)).ToList();
in Descending oreder
var orderedDateList = date.OrderByDescending(x => DateTime.Parse(x)).ToList();
Convert date from string[] to List<DateTime> first:
List<DateTime> dtList = date.Select(x => DateTime.Parse(x)).ToList();
Then you can easily sort it:
dtList.Sort();
Using Linq's OrderBy:
var sortedDates = date.OrderBy(x => DateTime.Parse(x));
or
var sortedDates = date.OrderByDescending(x => DateTime.Parse(x));
if you are needed to sort dates descending
I suggest using Linq:
var date = hfAllDates.Value.Split('#')
.Select(line => DateTime.Parse(x))
.OrderBy(x => x)
.ToList();
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As in title, how to rewrite this linq query into method syntax?
(from row in recordsEpP
where (!string.IsNullOrEmpty(row.Column20)
&& !string.IsNullOrEmpty(row.Column14)
&& string.IsNullOrEmpty(row.Column8))
select new ReportDto{
Status = "P",
ContractNumber = row.ContractNumber,
Count = 1
}).ToList();
You could try something like this:
recordsEpP.Where(row=> !string.IsNullOrEmpty(row.Column20) &&
!string.IsNullOrEmpty(row.Column14) &&
string.IsNullOrEmpty(row.Column8)
).Select(row => new ReportDto{
Status = "P",
ContractNumber = row.ContractNumber,
Count = 1
}).ToList();
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I have an existing List that countains data
List<string>countries
I want to somehow loop through this data an populate the following collection
IEnumerable<SelectListItem> Countries
How would I go about in doing this?
The simplest method I can think off is using a Linq query:
Countries = countries.Select(country => new SelectListItem {Text = country, Value = country});
You won't have the ability to differ the text from the value, however.
Presuming this is related to mvc... try this
IEnumerable<SelectListItem> Countries = countries.Select(c => new SelectListItem { Text = c, Value = c });
Something like this I think.
IEnumerable<SelectListItem> Countries = countries.Select(c => new SelectListItem
{
Text = c,
Value = c
});