Kendo grid post and delete send null to controller - asp.net-web-api

Question

I'm posting a kendoui web grid and it isn't sending data and I can't see what I'm doing different from the sample that's failing. I'm posting to the controller, but it's either empty (if batch: true or null if batch: false)
var crudServiceBaseUrl = "api/Certifications/",
dataSource = new kendo.data.DataSource({
transport: {
read: {
url: crudServiceBaseUrl + member.id,
dataType: "json"
},
update: {
url: crudServiceBaseUrl,
type: "Post",
dataType: "json"
},
destroy: {
url: crudServiceBaseUrl,
type: "Delete",
contentType: "application/json; charset=utf-8",
dataType: "json"
},
create: {
url: crudServiceBaseUrl,
type: "Post",
dataType: "json"
},
parameterMap: function (options, operation) {
if (operation !== "read" && options.models) {
return {models: kendo.stringify(options.models)};
}
}
},
editable: { //disables the deletion functionality
update: true,
destroy: true
},
batch: true,
pageSize: 30,
schema: {
model: {
id: "Id",
fields: {
Id: { editable: false, nullable: true },
MemberId: { editable: false, nullable: true },
Name: { validation: { required: true} },
AuthorityName: { validation: { required: true} },
StartDate: { type: "date", validation: { required: true} },
EndDate: { type: "date" }
}
}
}
});
$("#certifications").kendoGrid({
dataSource: dataSource,
pageable: true,
height: 300,
toolbar: ["create"],
columns: [
{ field: "Name", title: "Product Name", width: 250 },
{ field: "AuthorityName", title: "Authority", format: "{0:c}", width: "140px" },
{ field: "StartDate", title: "Earned", template: '#= kendo.toString(StartDate,"MM/dd/yyyy") #', width: 50 },
{ field: "EndDate", title: "Expired", template: '#= kendo.toString(EndDate,"MM/dd/yyyy") #', width: 50 },
{ command: ["edit", "destroy"], title: " ", width: "130px" }],
editable: "popup"
});
the web api:
public Certification DeleteCertification(CertificationVm cert)
{
var model = Uow.Certifications.Get(cert.Id);
if (model == null)
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NoContent));
Uow.Certifications.Delete(model);
Uow.Commit();
return model;
}

Answer 1

I'd figured it out, although I had to depart from the example http://demos.kendoui.com/web/grid/editing-popup.html
The fix was add the content type, correctly use dataType: "json" as noted above, change from batch: true to batch: false and change the parameter map to the below
destroy: {
url: crudServiceBaseUrl,
type: "Delete",
contentType: "application/json; charset=utf-8",
dataType: "json"
},
parameterMap: function (model, operation) {
if (operation !== "read" && model) {
return kendo.stringify(model) ;
}
}

Answer 2

There is no such thing as jsonp + POST - it is discussed here.
Do not use jsonp unless you really know why you need it.