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POAsp.net MVC3, C#, Figure out Single or Multiple Json paramter?
 

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  1. POAsp.net MVC3, C#, Figure out Single or Multiple Json paramter?
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    <p>I'm passing to single JSON type parameter and multiple JSON type parameters to Asp.Net.</p> <p>and in Asp.Net, I need to figure out the parameter is single data or multiple data to update DB (EF, Repository pattern).</p> <p>[Single]</p> <p><img src="https://i.stack.imgur.com/TgEHe.png" alt="enter image description here"></p> <p>[Multiple]</p> <p><img src="https://i.stack.imgur.com/mfi9k.png" alt="enter image description here"></p> <p>Firstly, I tried like this,</p> <pre><code>[HttpPost] public ActionResult ItemUpdate(WEBORDERLN ln ,IList&lt;WEBORDERLN&gt; lns) { </code></pre> <p><strong>but it comes to ln always. it never go to lns :(</strong></p> <pre><code>[HttpPost] public ActionResult ItemUpdate(WEBORDERLN ln) { // it works for only single update </code></pre> <p>and </p> <pre><code>[HttpPost] public ActionResult ItemUpdate(IList&lt;WEBORDERLN&gt; lns) { // it works for only multiple update </code></pre> <p>How I figure out, the JSON type parameter is single or multiple?</p> <p>anybody know, please advice me.</p> <p>Thank you!</p> <p>[EDIT]</p> <p><img src="https://i.stack.imgur.com/7mGBw.png" alt="enter image description here"></p> <pre><code>[HttpPost] public ActionResult ItemUpdate(WEBORDERLNS lns) { try { EFWebOrderLnRepository webOrderLn = new EFWebOrderLnRepository(); log.Debug("Count : "+lns.lns.Count.ToString()); // Object reference not set to an instance of an object. log.Debug(lns.lns.Count()); //null, error : Value cannot be null log.Debug(lns.lns.Count().ToString()); //null, error : Value cannot be null foreach (WEBORDERLN ln in lns.lns) { webOrderLn.updateWebOrderLn(ln); // Error : Object reference not set to an instance of an object } . . . public class WEBORDERLNS { public IList&lt;WEBORDERLN&gt; lns { get; set; } } </code></pre> <p>[EDIT]</p> <pre><code>Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Encoding gzip, deflate Accept-Language en-us,en;q=0.5 Connection keep-alive Content-Length 875 Content-Type application/json; charset=UTF-8 Cookie user=38C6C07684B04645821CA5273EAB5B34340CE8CCA13A7D67DC748819B02C6963E4AD2A322068FC3090D3FE03EC81E663A5DED6FF2534E2595B40CF57EFF9BB544FFAC95CD79020E8A94019A3DC53B769EFC4049B6B9627E98AD9DBC1431BB5D99A47625B3353FA697A1CC005855C0248E95F61F7BD4A5362D75E5D01B395FB14E078524B8D0C7219AF959F9AED188AB30A16187DE166D5BD008B0013A65D470C52C9408C47FD42672B8FBABDB3524F77 Host localhost:49995 Referer http://localhost:49995/ User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.1 X-Requested-With XMLHttpRequest </code></pre> <p>[EDIT]</p> <p><img src="https://i.stack.imgur.com/z1olO.jpg" alt="enter image description here"></p>
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