c# - Return custom dynamic type -

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the dto classes we're returning dapper decorated attributes provide metadata each property (used ui), e.g:

public class person {     [metadata("first name")]     public string firstname { get; set; }     [metadata("last name")]     public string lastname { get; set; } }

in cases objects returned table may vary customer customer. have set of "common" fields , set of custom ones e.g. person.foo.

to facilitate intend use dynamic object (derived system.dynamic.dynamicobject).

public class dynamicperson : dynamicdto {     [metadata("first name")]     public string firstname { get; set; }     [metadata("last name")]     public string lastname { get; set; } }

the idea can reflect on instance properties metadata , use mechanism obtain dynamic property metadata.

when run following test:

var query = "select 'ben' firstname, 'foster' lastname, 25 age"; var people = cn.query<dynamicperson>(query);

only instance properties set (firstname , lastname). can make dapper set dynamic properties don't existing on instance?


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