Kendo & Web API using OData: ODataActionParameters is null - asp.net-web-api

Question

Using OData v3, trying to bind Kendo Grid to OData Actions.
Problem
ODataActionParameters is always null...
Here are my actions:
[EnableQuery]
[HttpPost]
public virtual IQueryable<ComparitiveLocalizableString> GetComparitiveTable(ODataActionParameters parameters)
{
string cultureCode = (string)parameters["cultureCode"];
var query = Repository.Table
.Where(x => x.CultureCode == null || x.CultureCode == cultureCode)
.GroupBy(x => x.TextKey)
.Select(grp => new ComparitiveLocalizableString
{
Key = grp.Key,
InvariantValue = grp.FirstOrDefault(x => x.CultureCode == null).TextValue,
LocalizedValue = grp.FirstOrDefault(x => x.CultureCode == cultureCode) == null ? "" : grp.FirstOrDefault(x => x.CultureCode == cultureCode).TextValue
});
return query;
}
[HttpPost]
public virtual IHttpActionResult PutComparitive(ODataActionParameters parameters)
{
string cultureCode = (string)parameters["cultureCode"];
string key = (string)parameters["key"];
var entity = (ComparitiveLocalizableString)parameters["entity"];
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
if (!key.Equals(entity.Key))
{
return BadRequest();
}
var existing = Repository.Table.FirstOrDefault(x => x.CultureCode == cultureCode && x.TextKey == key);
if (existing == null)
{
return NotFound();
}
existing.TextValue = entity.LocalizedValue;
Repository.Update(existing);
return Updated(entity);
}
[HttpPost]
public virtual IHttpActionResult DeleteComparitive(ODataActionParameters parameters)
{
string cultureCode = (string)parameters["cultureCode"];
string key = (string)parameters["key"];
var entity = Repository.Table.FirstOrDefault(x => x.CultureCode == cultureCode && x.TextKey == key);
if (entity == null)
{
return NotFound();
}
Repository.Delete(entity);
return StatusCode(HttpStatusCode.NoContent);
}
My OData route configuration:
var getComparitiveTableAction = builder.Entity<LocalizableString>().Collection.Action("GetComparitiveTable");
getComparitiveTableAction.Parameter<string>("cultureCode");
getComparitiveTableAction.Returns<IQueryable<ComparitiveLocalizableString>>();
var putComparitiveAction = builder.Entity<LocalizableString>().Collection.Action("PutComparitive");
putComparitiveAction.Parameter<string>("cultureCode");
putComparitiveAction.Parameter<string>("key");
putComparitiveAction.Parameter<ComparitiveLocalizableString>("entity");
putComparitiveAction.Returns<IHttpActionResult>();
var deleteComparitiveAction = builder.Entity<LocalizableString>().Collection.Action("DeleteComparitive");
deleteComparitiveAction.Parameter<string>("cultureCode");
deleteComparitiveAction.Parameter<string>("key");
deleteComparitiveAction.Returns<IHttpActionResult>();
and the config for my Kendo Grid:
var odataBaseUrl = "/odata/cms/LocalizableStrings/";
$(document).ready(function () {
$("#Grid").kendoGrid({
data: null,
dataSource: {
type: "odata",
transport: {
read: {
url: odataBaseUrl + "GetComparitiveTable",
dataType: "json",
type: "POST"
},
update: {
url: odataBaseUrl + "PutComparitive",
dataType: "json",
type: "POST"
},
destroy: {
url: odataBaseUrl + "DeleteComparitive",
dataType: "json",
type: "POST"
},
parameterMap: function (options, operation) {
if (operation === "read") {
alert(cultureCode);
return JSON.stringify({
cultureCode: cultureCode
});
}
else if (operation === "update") {
var model = models[0];
return {
cultureCode: cultureCode,
key: model.Key,
entity: model
};
}
else if (operation === "destroy") {
var model = models[0];
return {
cultureCode: cultureCode,
key: model.Key
};
}
}
},
schema: {
data: function (data) {
return data.value;
},
total: function (data) {
return data["odata.count"];
},
model: {
fields: {
Key: { type: "string", editable: false },
InvariantValue: { type: "string", editable: false },
LocalizedValue: { type: "string" }
}
}
},
batch: true,
//etc......
Where am I going wrong? How can I fix this?

Answer 1

It seems I just needed to add, contentType: "application/json" as per the following:
read: {
url: odataBaseUrl + "GetComparitiveTable",
dataType: "json",
contentType: "application/json",
type: "POST"
},
update: {
url: odataBaseUrl + "PutComparitive",
dataType: "json",
contentType: "application/json",
type: "POST"
},
destroy: {
url: odataBaseUrl + "DeleteComparitive",
dataType: "json",
contentType: "application/json",
type: "POST"
}