Pass data Jquery function to MVC Controller

Question

4.00/5 (1 vote)

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Hi I am trying to pass information to my controller.
This is my jquery function:

JavaScript

$("#Add").click(function () {
            var jsonText = JSON.stringify({ tagName: getPTag(), start: getPStart(), end: getPEnd() });
            $.ajax({
                url: '@Url.Action("Data", "TagValues")',
                dataType: 'JSON',
                data: jsonText,
                contentType: "application/json; charset=utf-8",
                success: function (data) {
                    alert(data.toString());
                },
                error: function () {
                    alert("Tag or Times aren't formatted right");
                }
            });
        });

This is in the RouteConfig:

C#

routes.MapRoute(
                "TagValuesdata",
                "TagValues/Data/{tagName}/{start}/{end}",
                new { controller = "TagValues", action = "Data", tagName = "", start = "", end = "" }
                );

This is in my controller:

C#

public class TagValuesController : Controller
    {
        //
        // GET: /TagValues/

        public JsonResult Data(string tagName, string start, string end)
        {
            return Json(tagName, behavior: JsonRequestBehavior.AllowGet);
}

When ever I run the function. I get an alert message that is blank. Why is my parameter an empty string or null? Is it a routing problem? I tested my getPTag() with an alert, and getPTag returns the string.

Posted 27-Jun-12 12:28pm

Member 8336910

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Wonde Tadesse · Accepted Answer · 2012-06-27T13:00:00

Here is simple Ajax with post. Assuming that you do have an html table with a name called AjaxGrid and a div with a name bio

JavaScript

$(document).ready(function () {
        $('#AjaxGrid tbody tr').click(function () {
            var selectedraw = $(this).closest("tr");
            var id = selectedraw.find("td:first").text(); // Id value
            var url = "FamousFolks/GetFamousFolk/" + id;
            $.post(url,
                   null,
                   function (folk) {
                       $('#bio').html(folk.Bio);
                   }
            );
        });

HTML

<table id="AjaxGrid">
    <thead>
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.ID)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Name)
            </th>           
        </tr>
    </thead>
    @foreach (var item in Model)
    {
        <tr>
            <td style="visibility: hidden">
                @Html.DisplayFor(modelItem => item.ID)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Name)
            </td>           
        </tr>
    }
    <td>
        <div id="bio">
        </div>
    </td>
</table>

And here is the controller.

C#

/// <summary>
/// Get Bio of Folk
/// </summary>
/// <param name="id">Id Value</param>
/// <returns></returns>
[HttpPost]
public ActionResult GetFamousFolk(int? id = null)
{

    // Folk a database table mapped to EF entity with ID,Name and Bio attributes and comes from the model
    // Folks is a collection of Folk class
    Folks folk = folksRepository.Load(id); // Load folk by Id
    return Json(folk);// Get Folk data as JSON format
}

And register the routing like this

C#

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");            
    routes.MapRoute(
      "FamousFolks", // Route name
      "{controller}/{action}/{id}", // URL with parameters
      new { controller = "FamousFolks", action = "Index", id = UrlParameter.Optional } // Parameter defaults
  );          
}