ExtJS 4.1 Infinite Grid Scrolling doesnt work

Question

I want to get an infinite scrolling grid with extjs4 and a c# backend... i am setting the proxy api in my controller..

My Model:

Ext.define('SCT.model.training.course.TrainingRequirementList', {
    extend: 'Ext.data.Model',
    idProperty: 'ID',
    fields: [
        { name: 'ID', type: 'int', convert: null },
        { name: 'EmployeeName', type: 'string' },
        { name: 'Description', type: 'string' },
        { name: 'StatusText', type: 'string' },
        { name: 'Status', type: 'int' },
        { name: 'Priority', type: 'string' },
        { name: 'Date', type: 'string' },
        { name: 'Cost', type: 'string' },
        { name: 'CanApprove', type: 'bool' },
        { name: 'CanRequest', type: 'bool' },
        { name: 'ConfirmStatus', type: 'string' },
        { name: 'PlanId', type: 'int'}
    ]

});

My Grid:

{
    xtype: 'gridpanel',
    flex: 1,
    padding: '0 10 10 10',
    minHeight: 200,
    verticalScroller: {
        xtype: 'paginggridscroller'
    },
    store: {
        model: 'SCT.model.training.course.TrainingRequirementList',
        pageSize: 200,
        autoLoad: true,

        remoteSort: true,
        sorters: {
            property: 'Date',
            direction: 'DESC'
        },

        proxy: {
            type: 'direct',
            extraParams: {
                total: 50000
            },
            reader: {
                type: 'json',
                root: 'ID',
                totalProperty: 'totalCount'
            },
            simpleSortMode: true
        }
    },
    columns:
        [{
            text: Lang.Main.Employeee,
            dataIndex: 'EmployeeName',
            flex: 1,
            filterable: true
        },
        {
            text: Lang.Main.Course,
            dataIndex: 'Description',
            flex: 1,
            filterable: true
        },
        {
            text: Lang.Main.Status,
            dataIndex: 'StatusText',
            flex: 1,
            filterable: true
        },
        {
            text: Lang.Main.Priority,
            dataIndex: 'Priority',
            flex: 1
        },
        {
            text: Lang.Main.Date,
            dataIndex: 'Date',
            flex: 1
        },
        {
            text: Lang.Main.Cost,
            dataIndex: 'Cost',
            flex: 1,
            filterable: true
        },
        {
            text: Lang.Main.Actions,
            flex: 1,
            align: 'center',
            xtype: 'actioncolumn',
            width: 50,
            items: [{
                icon: 'Design/icons/cog_edit.png',
                tooltip: Lang.Main.Open,
                handler: function (grid, rowIndex, colIndex, item) {
                    this.onGridOpen(grid.getStore().getAt(rowIndex));
                }
            }]
        }],      
    selModel: { mode: 'MULTI', selType: 'checkboxmodel' },
}

setting proxy in controoler:

view.grid.getStore().setProxy({
            type: 'direct', 
            model: 'SCT.model.training.course.TrainingRequirementList', 
            api: { read: SCT.Service.Training.Plan.GetFilteredRequirements }, 
            extraParams: { total: 50000 }, 
            reader: {
                type: 'json',
                root: 'ID',
                totalProperty: 'totalCount'
            },
            simpleSortMode: true
        });

additional information about my view:

Ext.define('SCT.view.training.course.TrainingRequirements',
    {
        extend: 'Ext.panel.Panel',
        require: [ 'Ext.grid.PagingScroller', 'Ext.ux.grid.FiltersFeature'],

My grid is still loading all data at once (about 8000 rows...) ... i've searched for solutions and worked through tutorials.. i still dont get it.

please help me out... i dont get it at all...

UPDATE

this is my srv request:

and the response got 3MB (about 8k datasets... ) ..??

Answer 1

Your request dump shows that Ext effectively sends the limit param, so that's your server that is not handling it...

Just a piece of advice, but you should consider upgrading to last version of Ext, since buffered grid seems to have been simplified, and that will avoid you having to rework it if you eventually upgrade.