c# - Why are my KendoGrid "update" parameters always null in the controller? -


i have following code in index.cshtml file:

var datasource = new kendo.data.datasource({     type: "json",     transport: {         read: {             url: '@url.action("readteachers", "educationportal")',             datatype: "json"         },         update: {             url: '@url.action("updateteachers", "educationportal")',             type: "post"         },         parametermap: function (data, operation) {             if (operation != "read"){                  var result = {};                  (var = 0; < data.models.length; i++) {                     var teacher = data.models[i];                     (var member in teacher) {                         result["teacher[" + + "]." + member] = teacher[member];                     }                 }                  return result;             } else {                 return json.stringify(data);             }         }     },     batch: true,     schema: {         model: {             id: "teacherid",             fields: {                 teacherid: { type: "number" },                 fullname: { type: "string" },                 isheadmaster: { type: "boolean" }             }         }     } });  $("#teachers").kendogrid({     datasource: datasource,     toolbar: ["create", "save"],     columns: [         { field: "fullname", title: "teacher" },         { field: "isheadmaster", title: "is headmaster?", width: "120px" },         { command: ["destroy"], title: "&nbsp;", width: "85px" }],     editable: true });

this standard kendogrid "batch" editing. editing , grid both work fine, backend doesn't. when "update" request goes through, goes controller method:

public void updateteachers(string models) {     // method have real code later     console.write(models); }

when put breakpoint in here, visual studio shows models null. so:

enter image description here

why null?

in parametermap: function ()

instead of using 

return json.stringify(data);

use

return { models: kendo.stringify(data) };

here data serialize , attached name models name models used parameter name in action


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