Find a record through linq query in c#

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Dear friend these are my entities

C#

public class FileInformation : Entity
        {            
            
            public string FileName { get; set; }            
            public string FilePath { get; set; }            
            public string Clientid { get; set; }
            public List<ChangeInformation> ChangeInformations { get; set; }
            public FileInformation()
            {
                this.ChangeInformations = new List<ChangeInformation>();
            }
        }
        public class ChangeInformation 
        {
                        
            public string FileName { get; set; }            
            public string OldFileName { get; set; }            
            public long FileSize { get; set; }            
            public DateTime ModifiedDate { get; set; }            
            public string HashValue { get; set; }
            public string DeviceID { get; set; }            
            public DateTime CreationDate { get; set; }            
            public string Status { get; set; }
            public ChangeInformation()
            {

            }
        }

how i can find all the files whose status in change information are deleted ?

What I have tried:

i have tried following query
var files = finfo.Where(n => n.ChangeInformations.Where(x=>x.Status=="Deleted");

Posted 10-Feb-16 22:08pm

srilekhamenon

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2 solutions

Solution 2

This place show you how do this

101 LINQ Samples in C#[^]

Posted 10-Feb-16 22:52pm

Beginner Luck

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Andy Lanng · Accepted Answer · 2016-02-10T22:17:00

Solution 1

A Where clause is Func<tinput,bool>. That means that the return must be a boolean. n.ChangeInformations.Where(x=>x.Status=="Deleted") is not a boolean. You should use Any which will return a boolean if any items match the criteria:

C#

var files = finfo.Where(n => n.ChangeInformations.Any(x=>x.Status=="Deleted"));

Posted 10-Feb-16 22:17pm

Andy Lanng

Comments

Maciej Los 11-Feb-16 5:01am

5ed!