kendo ui how to filter dataSource requestStart - kendo-ui

Question

Main Problem
My current problem is the refresh progress when updating a grid datasource. I have change my code use the kendo.ui.progress in that way when requestStart event starts I ser the kendo.ui.progress to true. This activates the loading image when it end it calls the requestEnd.
The problem is that this event is hapenning for sorting and filtering. And I want it to only trigger for the read function of the dataSource. This problem makes the grid to use the progress endlessly.
Is there some way to filter in the requestStart and requestEnd only activate on the transport read?
My DataSource Code
dataSource = new kendo.data.DataSource({
transport: {
read: {
url: url_Obtener_Periodo,
type: "POST"
},
parameterMap: function (options, operation) {
if (operation == "read" && options) {
return {
"periodo.Year": $("#periodo-anio").val(),
"periodo.Month": $("#periodo-mes").val(),
"Filtro": $("#Filtro").val()
};
}
}
},
requestStart: function (e) {
kendo.ui.progress($("#grid-container"), true);
},
requestEnd: function (e) {
kendo.ui.progress($("#grid-container"), false);
},
schema:{
model: {
id: "Codigo_De_Pedido",
fields: {
Codigo_De_Pedido: { type: "number" },
Fecha_Y_Hora_De_Creacion: { type: "date" },
UserName: { type: "string" },
Nombre_Del_Usuario: { type: "string" },
Codigo_Del_Vendedor: { type: "number" },
Nombre_Del_Vendedor: { type: "string" },
Is_Pedido_Closed: { type: "bool" },
Estado: { type: "string" }
}
}
},
pageSize: 10
});

Answer 1

The changes I did to solve the progress endlessly problem where 2.
Removing requestEnd function from the dataSource
Adding dataBound function to the Grid
Data Source Code
dataSource = new kendo.data.DataSource({
transport: {
read: {
url: url_Obtener_Periodo,
type: "POST"
},
parameterMap: function (options, operation) {
if (operation == "read" && options) {
return {
"periodo.Year": $("#periodo-anio").val(),
"periodo.Month": $("#periodo-mes").val(),
"Filtro": $("#Filtro").val()
};
}
}
},
schema:{
model: {
id: "Codigo_De_Pedido",
fields: {
Codigo_De_Pedido: { type: "number" },
Fecha_Y_Hora_De_Creacion: { type: "date" },
UserName: { type: "string" },
Nombre_Del_Usuario: { type: "string" },
Codigo_Del_Vendedor: { type: "number" },
Nombre_Del_Vendedor: { type: "string" },
Is_Pedido_Closed: { type: "bool" },
Estado: { type: "string" }
}
}
},
pageSize: 10,
requestStart: function (e) {
kendo.ui.progress($("#grid-container"), true);
}
});
Kendo Grid Code
kendoGrid = $("#selectable-pedidos").kendoGrid({
dataSource: dataSource,
pageable: true,
sortable: true,
filterable: {
extra: false,
operators: {
string: {
startswith: "Comienza Con",
eq: "Es Igual A",
neq: "No Es Igual A"
}
}
},
dataBound: function (e) {
kendo.ui.progress($("#grid-container"), false);
},
columns: [
{ field: "Fecha_Y_Hora_De_Creacion", title: "Fecha y Hora", template: "#= kendo.toString(Fecha_Y_Hora_De_Creacion, 'dd/MM/yyyy hh:mm:ss tt') #" },
{ field: "Codigo_De_Pedido", title: "Código de Pedido" },
{ field: "Estado", filterable: true, title: "Estado" },
{ field: "Codigo_Del_Vendedor", title: "Código de Vendedor" },
{ field: "Nombre_Del_Vendedor", title: "Nombre de Vendedor" },
{
command: {
text: "Ver Detalle de Pedido",
click: function (e) {
$("#empty").append("<form method='POST' action='/HojaDeRuta/GetById/'><input type='hidden' name='Codigo_Pedido' value='"
+ this.dataItem($(e.currentTarget).closest("tr")).Codigo_De_Pedido + "' /><input type='submit' /></form>");
$("#empty input[type='submit']").click();
}
},
title: " "
}
]
}).data("kendoGrid");

Answer 2

There are a few things about your questions worth mentioning for those who read this:
Is there some way to filter in the requestStart and requestEnd only
activate on the transport read?
Yes, but it will not help you. The parameter of the event has a type property that will contain read, update, destroy or create.
statementEntriesDS.bind("requestStart", function (e) {
switch (e.type) {
case "create":
alert('-> event, type "create".');
break;
case "read":
alert('-> event, type "read".');
break;
case "update":
alert('-> event, type "update".');
break;
case "destroy":
alert('-> event, type "destroy".');
break;
}
});
Your example code doesn't specify serverFiltering or serverSorting so sorting and filtering wouldn't cause an remote action. You'll only get client-side sorting and filtering. However, if they are specified they're all going to result in a read and that wouldn't really help you.
That you would not have the requestEnd event fire sounds odd. You should probably add a handler for the error event and see if something is failing.
If you really want complete control over what's happening, you can specify a function for your read:
transport: {
read: function (options) {
kendo.ui.progress($gridContainer, true);
$.ajax({
url: carrierServiceBaseUrl + "/GetManualStatementsCarrierList",
contentType: 'application/json; charset=utf-8',
dataType: "json",
type: "POST",
success: function (result) {
// notify the data source that the request succeeded
options.success(result);
kendo.ui.progress($gridContainer, false); },
error: function (result) {
options.error(result); // Call the DataSource's "error" method with the results
kendo.ui.progress($gridContainer, false);
notification.show({
title: "ERROR:",
message: result.statusText
}, "error");
}
});
}
}