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Endless scrolling of remote data

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                        endless_scrolling_remote.cshtml
                    
                        Endless_Scrolling_RemoteController.cs

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API REFERENCE

kendo.syncReady(function(){jQuery("#Grid").kendoGrid({"columns":[{"title":"Product name","headerAttributes":{"data-field":"ProductName","data-title":"Product\u0026#32;name"},"field":"ProductName","encoded":true,"editor":"\u003cinput data-val=\"true\" data-val-remote=\"\u0026#39;Product name\u0026#39; is invalid.\" data-val-remote-additionalfields=\"*.ProductName\" data-val-remote-url=\"/aspnet-mvc/validation/isproductname_available\" data-val-required=\"The Product name field is required.\" id=\"ProductName\" name=\"ProductName\" /\u003e\u003cscript\u003e\r\n\tkendo.syncReady(function(){jQuery(\"#ProductName\").kendoTextBox({});});\r\n\u003c/script\u003e\u003cspan class=\"field-validation-valid\" data-valmsg-for=\"ProductName\" data-valmsg-replace=\"true\"\u003e\u003c/span\u003e"},{"title":"Unit price","headerAttributes":{"data-field":"UnitPrice","data-title":"Unit\u0026#32;price"},"width":"140px","field":"UnitPrice","format":"{0:C}","encoded":true,"editor":"\u003cinput data-val=\"true\" data-val-number=\"The field Unit price must be a number.\" data-val-range=\"The field Unit price must be between 0 and 2147483647.\" data-val-range-max=\"2147483647\" data-val-range-min=\"0\" data-val-required=\"The Unit price field is required.\" id=\"UnitPrice\" name=\"UnitPrice\" style=\"width:100%\" type=\"text\" value=\"0\" /\u003e\u003cscript\u003e\r\n\tkendo.syncReady(function(){jQuery(\"#UnitPrice\").kendoNumericTextBox({\"enable\":true,\"min\":0,\"max\":2147483647,\"format\":\"c\"});});\r\n\u003c/script\u003e\u003cspan class=\"field-validation-valid\" data-valmsg-for=\"UnitPrice\" data-valmsg-replace=\"true\"\u003e\u003c/span\u003e"},{"title":"Units in stock","headerAttributes":{"data-field":"UnitsInStock","data-title":"Units\u0026#32;in\u0026#32;stock"},"width":"140px","field":"UnitsInStock","encoded":true,"editor":"\u003cinput data-val=\"true\" data-val-number=\"The field Units in stock must be a number.\" data-val-range=\"The field Units in stock must be between 0 and 2147483647.\" data-val-range-max=\"2147483647\" data-val-range-min=\"0\" data-val-required=\"The Units in stock field is required.\" id=\"UnitsInStock\" name=\"UnitsInStock\" style=\"width:100%\" type=\"text\" value=\"0\" /\u003e\u003cscript\u003e\r\n\tkendo.syncReady(function(){jQuery(\"#UnitsInStock\").kendoNumericTextBox({\"enable\":true,\"min\":-2147483648,\"max\":2147483647,\"format\":\"n0\",\"decimals\":0});});\r\n\u003c/script\u003e\u003cspan class=\"field-validation-valid\" data-valmsg-for=\"UnitsInStock\" data-valmsg-replace=\"true\"\u003e\u003c/span\u003e"},{"title":"Discontinued","headerAttributes":{"data-field":"Discontinued","data-title":"Discontinued"},"width":"140px","field":"Discontinued","encoded":true,"editor":"\u003cinput class=\"k-checkbox\" data-val=\"true\" data-val-required=\"The Discontinued field is required.\" id=\"Discontinued\" name=\"Discontinued\" type=\"checkbox\" value=\"true\" /\u003e\u003clabel class=\"k-checkbox-label\" for=\"Discontinued\"\u003e\u003c/label\u003e\u003cinput name=\"Discontinued\" type=\"hidden\" value=\"false\" /\u003e\u003cspan class=\"field-validation-valid\" data-valmsg-for=\"Discontinued\" data-valmsg-replace=\"true\"\u003e\u003c/span\u003e"},{"width":"250px","command":[{"name":"edit","buttonType":"ImageAndText","text":{"edit":"Edit "}},{"name":"destroy","buttonType":"ImageAndText","text":"Delete"}]}],"pageable":{"numeric":false,"previousNext":false,"buttonCount":10},"sortable":true,"scrollable":{"endless":true,"height":"200px"},"editable":{"confirmation":"Are you sure you want to delete this record?","confirmDelete":"Delete","cancelDelete":"Cancel","mode":"inline","create":true,"update":true,"destroy":true},"toolbar":{"command":[{"name":null,"buttonType":"ImageAndText","text":"Add new record"}]},"dataSource":{"type":"odata","transport":{"read":{"url":"https://demos.telerik.com/kendo-ui/service/Northwind.svc/Products","dataType":"jsonp"},"update":{"url":"https://demos.telerik.com/kendo-ui/service/Products/Update","dataType":"jsonp"},"create":{"url":"https://demos.telerik.com/kendo-ui/service/Products/Create","dataType":"jsonp"},"destroy":{"url":"https://demos.telerik.com/kendo-ui/service/Products/Destroy","dataType":"jsonp"},"parameterMap":parameterMap},"pageSize":20,"page":0,"groupPaging":false,"total":0,"serverPaging":true,"serverSorting":true,"schema":{"data":function data(response) { return response.d ? response.d.results : response; },"model":{"id":"ProductID","fields":{"ProductID":{"type":"number"},"ProductName":{"type":"string"},"UnitPrice":{"type":"number"},"UnitsInStock":{"type":"number"},"Discontinued":{"type":"boolean"},"LastSupply":{"type":"date"},"UnitsOnOrder":{"type":"number"},"Category":{"type":"object"},"CategoryID":{"type":"number","defaultValue":null},"QuantityPerUnit":{"type":"string"}}}},"batch":true}});});

Description

The endless scrolling functionality enables the Grid widget to display large amounts of data by appending additional pages of data on demand. Loading of new items happens when the scrollbar of the Grid reaches its end. When the data is returned, only the new items will be rendered and appended to the old ones.

Grid infinite scrolling works with local and remote data. This demo presents binding Grid to remote data. In this scenario only the first page of data is serialized and rendered on the client. When the user reaches the end of the list, an Ajax request is made to fetch the next portion of data.

The endless scroll is compatible with Grouping, Hierarchy and Editing.

Endless scrolling of remote data

Description

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