I need to return multiple (two) partial views as an ActionResult from the controller. The first view contains general form elements and the second view contains the igGrid. Since I need to return multiple partialviews,  I was able to create a controller action that returned a JSON object containing the rendering for my two partial views. I also developed a helper method that render each partial view into a string (which is returned in the JSON object).

The problem is that while my first view is getting rendered just fine and the view containing the grid is not rendering. Any ideas how can I accomplish this?

Here's the helper method:

public static string RenderPartialView(ViewDataDictionary viewData, ControllerContext context, TempDataDictionary tempData, string viewName, object model)
{
viewData.Model = model;

using (System.IO.StringWriter writer = new System.IO.StringWriter())
{
ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(context, viewName);
ViewContext viewContext = new ViewContext(context, viewResult.View, viewData, tempData, writer);
viewResult.View.Render(viewContext, writer);

return writer.GetStringBuilder().ToString();
}
}

Here's the code grid defination:

@(Html.Infragistics()
.Grid(Model.MessageQueueRows)
.ID("grid")
.Width("100%")
.PrimaryKey("MessageQId")
.AutoGenerateColumns(false)
.AutoGenerateLayouts(false)
.Columns(column =>
{
column.For(x => x.LastName).HeaderText("Last Name").Width("200");
column.For(x => x.FirstName).HeaderText("First Name").Width("200");
column.For(x => x.CallPhone).HeaderText("Phone").Width("200");
column.For(x => x.TextPhone).HeaderText("Text Phone #").Width("200");
column.For(x => x.PersonId).HeaderText("ID").Width("200");
column.For(x => x.Group).HeaderText("Group").Width("200");
column.For(x => x.Subgroup).HeaderText("Subgroup").Width("200");
column.For(x => x.Sent).HeaderText("Sent Date").Width("200");
})

.Features(features =>
{
features.Sorting().Mode(SortingMode.Single).Type(OpType.Local).ApplyColumnCss(false).ColumnSettings(cs =>
{
cs.ColumnSetting().ColumnKey(Model.ColumnKey).AllowSorting(true).CurrentSortDirection(Model.Direction);
});
features.Paging().Type(OpType.Local).PageSize(Model.PgSize).CurrentPageIndex(Model.PageIndex);
features.Resizing();
})

.DataSource(Model.MessageQueueRows)
.DataBind()
.Render()
)