In .cshtml file we must to use this code:
<head>
@Html.Stimulsoft().RenderMvcDesignerScripts()
</head>
@(Html.Stimulsoft().StiMvcDesigner(new StiMvcDesignerOptions()
{
ActionGetReportTemplate = "GetCardReportSs",
LocalizationDirectory = Server.MapPath("~/Content/Localization/"), // Necessary to get a list of available localization files
ActionDataProcessing = "DataProcessing",
Width = Unit.Percentage(300),
Height = Unit.Pixel(800)
})
)