Hello,

I am using MVC helpers to configure igGrid.

When I configure LoadOnDemand for Grid in following way, I do not see Type available. I need to set the type to remote.

feature.LoadOnDemand().ChunkSize(10).LoadTrigger(LoadTrigger.Button).Type (OpType.Remote);

PLease help

Thanks,

Rajesh

Hello Martin,

Thanks for the information.

LoadOnDemand is not triggering for me. I tried remote sorting and filtering with this code, that works fine.

Here is my client code

@(Html.Infragistics().Grid(Model.Customers.AsQueryable())
.Width("400px")
.Height("300px")
.AutoGenerateColumns(false)
.Features(feature =>
{
       feature.LoadOnDemand().ChunkSize(10).LoadTrigger(LoadTrigger.Button);
})
.DataSourceUrl(Url.Action("GetAllC"))
.DataBind()
.Render()
)

Here is controller...........

public ActionResult GetAllC()
{

    var viewModel = new CustomersViewModel
   {
              Customers = GetCustomers(),

    };

  return View(viewModel.Customers.AsQueryable<Customer>());
}

Can you please let me know what can be wrong ?

Hello Rajesh,

There is a small issue in LoadOnDemand when used in the Grid MVC wrappers. It sends oData parameters instead of the default MVC ones. I logged this and fixed it, so it will be available in the next 13.2 SR.

The workaround again is to directly modify the igDataSource prototype (keep in mind that this is a global change, so it may affect other grids on the page). Here is the code:

$.ig.DataSource.prototype.settings.paging.pageIndexUrlKey = "page";

This code should be executed before the grid is initialized and after infragistics.datasource.js file is loaded. You can of course return the pageIndexUrlKey back to its original value after the grid is created.

Hope this helps,
Martin Pavlov
Infragistics, Inc. 

Hi Martin,

Thanks for the quick fix.

I have below code now

<script> $.ig.DataSource.prototype.settings.paging.pageIndexUrlKey = "page"</script>
@(Html.Infragistics().Grid(Model.Customers.AsQueryable())
.Width("400px")
.Height("300px")
.AutoGenerateColumns(false)
.ResponseDataKey("Records")
.Features(feature =>
{
    feature.Filtering().Type(OpType.Remote);
    feature.LoadOnDemand().ChunkSize(10).LoadTrigger(LoadTrigger.Button);
})
.DataSourceUrl(Url.Action("GetAllC"))
.DataBind()
.Render()
)

I am still not able to trigger the LoadOnDemand.

But when I execute filter feature for at least once, after that LoadOnDemand works fine. But for the first time it does not work.

Can you please let me know how do I make it work without using filter once.

Also the above fix has resolved one more problem for me, now after filtering is used at least once, grid is not filled with whole data. It is filled with only ChunkSize of LoadOnDemand Feature.

Thanks

Rajesh Varade

Hello Martin,

Can you please let me know what gird events are fired after igGrid LoadOnDemand is triggered and completed?

I am trying to catch iggridrowsrendered event after load on demand and not able to hit it.

Can you please throw some light on this? 

I am struggling to make SelectionPersistense.js work with load on demand. The restoreSelection() function of this .js file is tied with iggridrowrendered.

Thanks,

Rajesh

hi Martin,

I have created another post for clarity.

http://es.infragistics.com/community/forums/p/88078/437959.aspx#437959

Thanks for your inputs

Rajesh