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POcalling an Action in the Controller through JQuery from the cshtml and returning a value back
 

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  1. POcalling an Action in the Controller through JQuery from the cshtml and returning a value back
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    <p>I have a cshtml page, with 3 text boxes and 3 dropdowns.</p> <p>My idea is to have the user make a decision on the first question dropdown (YES/NO), and depending on this answer, populate the second text box, and enable the second dropdown (YES/NO), and same process for the third textbox.</p> <p>I have the following at the moment:-</p> <pre><code>&lt;script type="text/javascript"&gt; $(document).ready(function () { //disable the textboxes $("#T_FirstQuestion").attr('disabled', true); $("#T_SecondQuestion").attr('disabled', true); $("#T_ThirdQuestion").attr('disabled', true); //and the dropdowns intially $("#SecondQuestYesNo").attr('disabled', true); $("#ThirdQuestYesNo").attr('disabled', true); $("#FirstQuestYesNo").change(function () { val = $("#FirstQuestYesNo").val(); PostValue(val); }); function PostValue(val) { var url = "/Home/DecisionFirstQuest"; $("#T_SecondQuestion").attr('enabled', true); $.ajax({ type: "POST", url: url, data: { value: val } }).done(function (msg) { alert("Data Saved: " + msg); }); } }); &lt;/script&gt; @using (Html.BeginForm("Decision", "Home", FormMethod.Post, new { enctype = "multipart/form-data" })) { &lt;table&gt; &lt;tr&gt; &lt;td&gt; &lt;font face="Arial" size="2"&gt;&lt;b&gt;1&lt;/b&gt;&lt;/font&gt; &lt;/td&gt; &lt;td&gt; @Html.TextBox("T_FirstQuestion", ViewData["T_FirstQuestion"], new { @class = "NormalTextBox" }) &lt;/td&gt; &lt;td&gt; @Html.DropDownList("FirstQuestYesNo", ViewData["FirstQuestYesNoData"] as SelectList, new { @class = "normalDropdowns" }) &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; &lt;font face="Arial" size="2"&gt;&lt;b&gt;1&lt;/b&gt;&lt;/font&gt; &lt;/td&gt; &lt;td&gt; @Html.TextBox("T_SecondQuestion", ViewData["T_SecondQuestion"], new { @class = "NormalTextBox" }) &lt;/td&gt; &lt;td&gt; @Html.DropDownList("SecondQuestYesNo", ViewData["SecondQuestYesNoData"] as SelectList, new { @class = "normalDropdowns" }) &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; &lt;font face="Arial" size="2"&gt;&lt;b&gt;1&lt;/b&gt;&lt;/font&gt; &lt;/td&gt; &lt;td&gt; @Html.TextBox("T_ThirdQuestion", ViewData["T_ThirdQuestion"], new { @class = "NormalTextBox" }) &lt;/td&gt; &lt;td&gt; @Html.DropDownList("ThirdQuestYesNo", ViewData["ThirdQuestYesNoData"] as SelectList, new { @class = "normalDropdowns" }) &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; } </code></pre> <p>and my Controller is as follows :-</p> <pre><code> public ActionResult DecisionFirstQuest(string value) { string strMessage = ""; if (value == "Yes") { strMessage = "You have chosen YES!"; } else { strMessage = "You have chosen NO!"; } ViewData["T_SecondQuestion"] = strMessage; return RedirectToAction("Decision"); } public ActionResult DecisionSecondQuest(string value) { string strMessage = ""; if (value == "Yes") { strMessage = "You have chosen YES!"; } else { strMessage = "You have chosen NO!"; } ViewData["T_ThirdQuestion"] = strMessage; return RedirectToAction("Decision"); } public ActionResult Decision() { string FirstQuestYesNo = HttpContext.Request["FirstQuestYesNo"]; ViewData["T_FirstQuestion"] = "First Question Text"; var ddlYesNoData = new SelectList(new[] { new {ID="",Name="Please Select"}, new {ID="Yes",Name="Yes"}, new{ID="No",Name="No"}, }, "ID", "Name", 1); if (!String.IsNullOrEmpty(FirstQuestYesNo)) ViewData["FirstQuestYesNoData"] = FirstQuestYesNo; else ViewData["FirstQuestYesNoData"] = "Yes"; ViewData["FirstQuestYesNoData"] = ddlYesNoData; ViewData["SecondQuestYesNoData"] = ddlYesNoData; ViewData["ThirdQuestYesNoData"] = ddlYesNoData; return View(); } </code></pre> <p>I am managing to get the value of the first dropdown, and redirecting to the Decision action, however I am not getting the second question textbox filled up. Also I am getting like a popup with some HTML code, which I would like to avoid.</p> <p>So basically my question is, how can I fill up the second text box, and after the user chooses the (YES/NO), then fill up the third textbox.</p> <p>Also, am I using the correct approach or is there a better way to do this using MVC?</p> <p>Thanks for your help and time!</p> <p>-------------------UPDATE-------------------------------------------- I decided to go for a more easy example</p> <pre><code>&lt;script type="text/javascript"&gt; $(document).ready(function () { $("#YesNo").change(function () { val = $("#YesNo").val(); var url = "../Home/Decision"; $.post(url, { value: val}); }); }); &lt;/script&gt; @using (Html.BeginForm("Decision", "Home", FormMethod.Post, new { enctype = "multipart/form-data", id="Decision" })) { @Html.DropDownList("YesNo", new List&lt;SelectListItem&gt; { new SelectListItem{ Text="Select", Value = "" }, new SelectListItem{ Text="Yes", Value = "Yes" }, new SelectListItem{ Text="No", Value = "No" } }) string FirstQuestText = ViewBag.FirstQuestData; @Html.TextBox("T_FirstQuestion", FirstQuestText, new { @class = "NormalTextBox" }) } </code></pre> <p>And the Controller Actions:-</p> <pre><code> [HttpPost] public ActionResult Decision(string value) { string strMessage = ""; if (value == "Yes") { strMessage = "This is the Second Yes Question"; } else { strMessage = "This is the Second No Question"; } ViewBag.FirstQuestData = strMessage; return View(); } </code></pre> <p>The problem now is that I am getting the ViewBag.FirstQuestData populating correctly, however it is not displayed in the @Html.TextBox</p> <p>-----------------------------------JSON UPDATE--------------------------------------- cshtml</p> <pre><code> $("#YesNoQuest1").change(function () { alert('change'); val = $("#YesNoQuest1").val(); var url = "../Home/Decisions1"; $.getJSON(url, function(data) { alert(data.message); }); </code></pre> <p>controller</p> <pre><code> [HttpPost] public JsonResult Decisions1(string value) { string strMessage = ""; if (value == "Yes") { strMessage = "This is the Second Yes Question"; } else { strMessage = "This is the Second No Question"; } return Json(new { message = strMessage }, JsonRequestBehavior.AllowGet); } </code></pre>
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    1. COWhy not use JsonResult in your controller, instead of redirecting to actions? Your calls are ajax, you probably want to stick to returning JSON and interpreting that in your javascript.
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    2. COcan you give me an example of how to do that? Never used JSON
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