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POwhy is the json returning null values
 

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    <p>I have a javascript function that calls a method in the code behind for an asp.net c# application. I pass an array into JSON.stringify which returns the string equivalent to the jsonText value below. The values below represent only one of the records returned. </p> <pre><code>var jsonText = "[{\"eacItem\":{\"ID\":\"dc97d510-cd29-4a23-af7f-36c0acfa1914\",\"AP\":\"201407\",\"EAC\":\"0\"}}]"; </code></pre> <p>The string is then passed into the function to call the method in the code behind.</p> <pre><code>$.ajax({ type: "POST", traditional: true, //might be needed for serialization to work properly url: pagePath + "/" + "TestMethod", data: "{'eacArray':" + jsonText + "}", contentType: "application/json; charset=utf-8", dataType: "json", async: false, success: function (data) { alert("successfully posted data"); }, error: function (data) { alert("failed posted data"); alert(postData); } }); </code></pre> <p>This is the method in the code behind that is called.</p> <pre><code>[WebMethod] public static void TestMethod(List&lt;eacItem&gt; eacArray) { //do something } </code></pre> <p>This is the Class associated with the JSON data set as the parameter type for the method.</p> <pre><code>public class eacItem { public string ID { get; set; } public string AP { get; set; } public string EAC { get; set; } } </code></pre> <p>The data passed into the method contains the record(s) but the values are all null as shown in the screenshot below. I am not sure why this is happening and would appreciate any help.</p> <p><img src="https://i.stack.imgur.com/XksZw.jpg" alt="null array"></p> <p><img src="https://i.stack.imgur.com/BSbDU.jpg" alt="in code behind"></p> <p>Additional info that was requested. Here is a screenshot of the value in eacArray. <img src="https://i.stack.imgur.com/V02ae.jpg" alt="eacArray"></p> <p>This is the JSON string in debug <img src="https://i.stack.imgur.com/mhC7Y.jpg" alt="JSON"></p> <p>Result of JSON.stringify(eacArray) in data: "{'eacArray':" + JSON.stringify(eacArray) + "}",</p> <p>"[{\"eacItem\":{\"AP\":\"201407\",\"EAC\":\"0\",\"ID\":\"dc97d510-cd29-4a23-af7f-36c0acfa1914\"}},{\"eacItem\":{\"AP\":\"201304\",\"EAC\":\"0\",\"ID\":\"69326e1b-8d69-431f-8a5b-29f8b279d74c\"}},{\"eacItem\":{\"AP\":\"201305\",\"EAC\":\"0\",\"ID\":\"69326e1b-8d69-431f-8a5b-29f8b279d74c\"}},{\"eacItem\":{\"AP\":\"201306\",\"EAC\":\"0\",\"ID\":\"69326e1b-8d69-431f-8a5b-29f8b279d74c\"}}]"</p> <p><strong>Here is the corrected code in case it can help anyone:</strong></p> <pre><code> //Iterate through elements on page $('ElementContainingValue').each(function () { var ap = this.attributes.ap.value; var id = this.attributes.id.value; var eac = $(this).val(); var eacItem = { "AP": ap, "EAC": eac, "ID": id }; eacArray.push(eacItem); }); var pagePath = window.location.pathname; $.ajax({ type: "POST", traditional: true, //might be needed for serialization to work properly url: pagePath + "/" + "TestMethod", data: "{'eacArray':" + JSON.stringify(eacArray) + "}", // Contents of eacArray after stringify // "[{\"AP\":\"201407\",\"EAC\":\"0\",\"ID\":\"dc97d510"},{\"AP\":\"201408\",\"EAC\":\"0\",\"ID\":\"dc97d510-cd29-4a23-af7f-36c0acfa1914\"}] contentType: "application/json; charset=utf-8", dataType: "json", async: false, success: function (data) { alert("successfully posted data"); }, error: function (data) { alert("failed posted data"); alert(postData); } }); </code></pre> <p>This is the method called in the code behind.</p> <pre><code> [WebMethod] public static void TestMethod(List&lt;eacItem&gt; eacArray) { foreach (var eacItem in eacArray) { string ap = eacItem.AP; string id = eacItem.ID; string eac = eacItem.EAC; } } </code></pre> <p>This is the class associated with the array.</p> <pre><code> public class eacItem { public string ID { get; set; } public string AP { get; set; } public string EAC { get; set; } } </code></pre>
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    1. CODo you control the JSON output... that is, the JSON that you're submitting?
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