We can achieve your requirement by using SelectRow public method.In this method we can pass the index of the row to select.
var obj = $("#Grid").data("ejGrid");
// will select alternative rows
obj.multiSelectCtrlRequest = true;
We have created a sample and the same can be downloaded from the following location:
Please refer to the below KnowledgeBase articles for more details.
Please try the above sample and let us know if it helps.
Query: “Passing array of indexes in select rows method”
Currently we do not have support for select rows method, but we have created an improvement task for that. A support incident has been created under your account to track the status of this requirement. Please log on to our support website to check for further updates.
Prasanna Kumar N.S.V