1. Add multiselect: true

**2. Gets the value of the selected row **

var rowData = jQuery('#List').jqGrid('getGridParam','selarrrow');
    if(rowData.length)
    {
        for(var i=0;i<rowData.length;i++)
        {
           var name= jQuery('#List').jqGrid('getCell',rowData[i],'name');//Name is an attribute in the colModel
           alert(name);
        }
    }

**3. Set a row to select **  JQuery (’ # List ’). JqGrid (’ setSelection ’, ‘5’);