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POConcatenate values in List
 

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  1. POConcatenate values in List
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    <p>I have DTO consists of List of DeliveryNote, List of Customer. Each Delivery Note contains List of Quotations so that each delivery note have multiple quotations. But only same customer. Customer reference is in Quotations only. </p> <p>I need to select the query like delivery note date, number and Reference in Quotation List separated by comma (if multiple). </p> <p>I write LINQ like below</p> <pre><code> var source = from A in _deliveryNote.DeliveryNoteList select new { A.ID, A.Date, A.Number, Reference = String.Join(", ", from item in A.Quotations select item.Reference), CustomerName = (A.Quotations != null ? _deliveryNote.CustomerList.Find(x =&gt; x.ID == A.Quotations.First().CustomerID).Name : string.Empty) }; </code></pre> <p>This is working nice. But i need some tips like my unhandled case like if no quotations are available how it is handled and also when single wuotation is applicable how to avoid comma.</p> <p>Also i got some other type of query like below. </p> <pre><code>var source = from A in _deliveryNote.DeliveryNoteList from B in A.Quotations select new { A.ID, A.Date, A.Number, //Reference = String.Join(", ", from item in A.Quotations select item.Reference), //CustomerName = (A.Quotations != null ? _deliveryNote.CustomerList.Find(x =&gt; x.ID == A.Quotations.First().CustomerID).Name : string.Empty) //_deliveryNote.CustomerList.Find(x =&gt; x.ID == C.CustomerID).Name : String.Empty) }; </code></pre> <p>But here i don't know how i concatenate references and retrieve customer name</p> <p>Please guide me which is better way and also what is the difference between both approach</p>
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    1. PTQuestion
    1. USSasi Kathimanda
    1. USAkhil
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    1. COThe difference is: One does what you want. The other doesn't. Whats the issue?
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      1. USSimon Whitehead
    2. COThe first is the correct method i think i went in the correct way. I just confused with the second method
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      1. USAkhil
    3. COHow about changing the first a little in case no quotations are available? `Reference = (A.Quotations != null) ? String.Join(", ", from item in A.Quotations select item.Reference) : string.Empty,`
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      1. USuser3093781
 

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