I am trying to dynamically add grid filters in my view using the html helper via datasource configuration, like this example from the kendo documentation:
#(Html.Kendo().Grid<Product>()
.Name("grid")
.DataSource(dataSource => dataSource
.Ajax()
.Read(read => read.Action("Products_Read", "Home"))
.Filter(filters =>
{
if (someCondition){
// Show products whose ProductName property contains "C"
filters.Add(product => product.ProductName).Contains("C");
// and UnitsInStock is greater than 10
filters.Add(product => product.UnitsInStock).IsGreaterThan(10);
}
})
)
)
The filters are added, but the filterdescriptor.Value in each case is always null (the Member and Operator are fine).
Any help much appreciated.
Thanks!
--Berry
Make sure you have included kendo.aspnetmvc.min.js. Missing it would lead to similar symptoms.
Related
I'm working with a Kendo-UI grid for asp.net MVC (version 2022.2.621.545) and I added multi-checkbox filtering to the columns. The grid items are pulled from the server using a configured ajax call to a controller action, and clicking on a filter button triggers another call to retrieve the full set of items in order to build the checkbox list. In some cases there are too many items returned and the grid appears to hang trying to determine the unique items for the checkbox list.
I was wondering if lazy loading can be configured for multi-checkbox filtering such that paging info is sent to the data source controller action. Alternatively, I've read that there may be a way to hold off on retrieving items for the filter until a minimal search string has been entered, with the search string being sent to the data source controller action.
I've looked at Kendo-UI documentation for multi-checkbox filtering options, but nothing has been abundantly clear that what I need to do is possible, especially within the asp.net MVC directives. I'm hoping someone can provide some guidance as to how to modify my grid setup to configure additional control for retrieving filter options. This is my current working code:
<div style="height:690px" id="warehouseGrid">
#(Html.Kendo().Grid<WarehouseModel>()
.Name("inventoryGrid")
.HtmlAttributes(new { style = "height:100%; width: 100%;" })
.Columns(columns =>
{
columns.Bound("InventoryLineItemID").Title("").Width(35).Filterable(false).ClientTemplate(
"<img src='https://cdn.host/show_detail.png' class='k-icon k-delete' height='45' width='45' onclick='ShowInventoryItemDetails(\"#= InventoryLineItemID #\")' onmouseover='' style='cursor: pointer;' title='Show Inventory Item Details' alt='Show Inventory Item Details' />"
);
foreach (WarehouseField col in fields)
{
if (!string.IsNullOrEmpty(col.Template))
{
columns.Bound(col.PropertyName).Title(col.Title).Width(col.Width).Filterable(false).ClientTemplate(col.Template);
}
else
{
columns.Bound(col.PropertyName).Title(col.Title).Width(col.Width).Filterable(ftb => ftb.Multi(true).Search(true));
}
}
})
.Pageable(pager => pager.PageSizes(new[] { 10, 20, 50, 100 }))
.Excel(excel => excel
.AllPages(true)
)
.ToolBar(
toolbar =>
{
toolbar.Template(#<text>
#ToolbarTemplate()
</text>);
}
)
.Events(e => e.DataBinding(#<text>function(e) { onDataBinding(this) }</text>))
.Events(e => e.DataBound(#<text>function(e) { onDataBound(this) }</text>))
.Resizable(r => r.Columns(true))
.ColumnResizeHandleWidth(5)
.Scrollable()
.Sortable()
.Filterable()
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(100)
.Read(read => read.Action("GetInventory", "Warehouse", new { area = "Rest" }).Data("additionalData"))
)
)
</div>
I've recently purchased a Kendo subscription, I'm having trouble getting an AJAX bound grid to operate as expected, hoping someone here can help.
I have followed the Kendo docs tutorial # http://docs.kendoui.com/getting-started/using-kendo-with/aspnet-mvc/helpers/grid/ajax-binding
and could get the AJAX binding working nicely.
I've tried to now implement it into an existing MVC solution, and whenever I click the New or Edit command button, I get a string of JSON returned to the browser. Similiar to issue (JSON data to KENDO UI Grid ASP.NET MVC 4) But the answer in that problem didn't work for me.
Here is my Controller code...
public ActionResult Index()
{
// non-important code removed here //
var viewModel = newReferenceViewModel();
ViewBag.TradeReferences = TradeReferenceWorker.Get(applicationId);
return View(viewModel);
}
public ActionResult TradeReferences_Read([DataSourceRequest]DataSourceRequest request)
{
var applicationId = GetCurrentApplicationId();
DataSourceResult result = TradeReferenceWorker.Get(applicationId).ToDataSourceResult(request);
return Json(result, "text/x-json", JsonRequestBehavior.AllowGet);
}
And the View ....
#(Html.Kendo().Grid((IEnumerable<TradeReference>)ViewBag.TradeReferences)
.Name("gridTradeReference")
.DataSource(dataSource => dataSource
.Ajax()
.Model(model =>
{
model.Id(tradeReference => tradeReference.TradeReferenceId);
model.Field(tradeReference => tradeReference.TradeReferenceId).Editable(false);
})
.Read(read => read.Action("TradeReferences_Read", "References"))
.Create(create => create.Action("TradeReference_Create", "References"))
.Update(update => update.Action("TradeReference_Update", "References"))
.Destroy(destroy => destroy.Action("TradeReference_Destroy", "References"))
)
.Columns(columns =>
{
columns.Bound(tref => tref.TradeReferenceId).Visible(false);
columns.Bound(tref => tref.Name);
columns.Bound(tref => tref.Phone);
columns.Command(commands =>
{
commands.Edit();
commands.Destroy();
}).Title("").Width(200);
})
.ToolBar(toolbar => toolbar.Create())
.Editable(editable => editable.Mode(GridEditMode.InLine))
.Sortable()
)
So to sum up... the Grid will load perfectly the first time. I haven't wired up anything on the Edit / Delete actions, just trying to get Create operational. Clicking Add New, or even Edit for that matter will make the browser simply display Json to the screen.
It is hopefully something simple - thanks in advance
Solved it - the problem was the kendo js files were not being referenced correctly.
In my particular case, the bundling wasn't done 100% correctly so the Kendo javascript files were never getting included in the page.
They must also appear in a certain order, as described in the troubleshooting guide http://docs.kendoui.com/getting-started/using-kendo-with/aspnet-mvc/helpers/grid/troubleshooting
I have a simple kendo grid that I am trying to associate an editor template with. The foreign key is the only property that is sent down to the client so I can't give the editor template a model type of the foreign key property.
Configuration for Kendo Grid
protected override void Configure(GridBuilder<AreaModel> grid)
{
grid.Columns(c =>
{
c.Bound(a => a.Description);
c.Bound(p => p.CompanyId).ClientTemplate("#= CompanyDescription#").EditorTemplateName("DropDown/CompanyId").Width(160);
c.Command(command => command.Edit()).Width(200);
c.Command(command => command.Destroy()).Width(110);
});
grid.ToolBar(toolbar => toolbar.Create().Text("New Area"));
grid.Editable(edit => edit.Mode(GridEditMode.InLine));
grid.DataSource(d => d
.Ajax()
.Model(m => m.Id(p => p.Id))
.Create("GridInsert", "Area")
.Update("GridUpdate", "Area")
.Destroy("GridDelete", "Area"));
}
}
The editor template is straight forward as well. Everything works except that the value is not posted to the server.
#using Kendo.Mvc.UI
#(Html.Kendo().DropDownList()
.Name("CompanyId")
.DataValueField("Id")
.DataTextField("Name")
.DataSource(d => d.Read("CompaniesData", "Company")))
Can anybody help me out on this one?
modelview propoerty name which should maintain dropdownlist's selected value must be the Name of dropdownlist in editorTemplate and the type of datavaluefield and property should be same.
I am using ASP.Net Mvc 4 with Kendo UI grid.
I would like to perform more advanced features on the kendo UI grid (like exporting the sorted data from the grid to excel, adding filters, etc.). I need to configure the DataSource in my View and the "Read" method in the Controller. The grid is populated from a LINQ query and stored in the ViewBag.
Here is the razor code in my view Index.cshtml
#(Html.Kendo().Grid((IEnumerable<Reports.Models.Company>)ViewBag.ActComp)
.Name("grid")
.Columns(columns =>
{
columns.Bound(comp => comp.Name);
columns.Bound(comp => comp.DateCreated);
columns.Bound(comp => comp.Quarter).Sortable(false);
columns.Bound(comp => comp.Code);
columns.Bound(comp => comp.Enabled).Column.Title = "Active";
})
.Sortable()
.Groupable()
.Scrollable(src => src.Height(500))
)
Here is the Controller ActiveCompController.cs
namespace Reports.Controllers
{
public class ActiveCompController : Controller
{
private FSLContext fslData = new FSLContext();
public ActionResult Index()
{
ViewBag.ActComp = from b in fslData.Companies
where b.Enabled == true
orderby b.Name
select b;
return View();
}
I have seen a couple of different examples with .Ajax() like:
.DataSource(dataSource => dataSource // Configure the grid data source
.Ajax() // Specify that ajax binding is used
.Read(read => read.Action("Products_Read", "Home")) // Set the action method which will return the data in JSON format
However, it didn't work as my data is from a LINQ query not formatted in JSON. Also, I don't know what to write in the "Read" method.
Any thoughts on how to configure the Datasource and the controller with my configuration ?
It looks like your code is similar to the example for the Kendo Grid at
http://demos.kendoui.com/web/grid/index.html
I would start by setting up a ViewModel class for Company that would hold all of your columns for the grid similar to how they have a ProductViewModel in their example. For instance, you would have the following in your ViewModel:
Name, DateCreated, Quarter, Code, Enabled
If you navigate to ASP.NET MVC > IndexController.cs you'll see where they've defined their method:
public ActionResult Products_Read([DataSourceRequest] DataSourceRequest request)
From there you'll see that they wrapped their LINQ results into their ViewModels and returned them in JSON format. You're on the right track for setting up the DataSource for your grid. As far as the Controller goes, you would change
.Read(read => read.Action("Products_Read", "Home"))
to
.Read(read => read.Action("<YourMethodHere>", "Home"))
Which will allow you to modify the logic for the read. However, note the Read operation is simply used for populating the table, any other functionality (such as sorting) would be handled differently. For more information on sorting take a look here
http://demos.kendoui.com/web/grid/sorting.html
My model contains an enumeration that I'd like to filter the grid on when it's loaded via AJAX.
.cshtml Code:
#(Html.Kendo().Grid()
.Name("Grid")
.Columns(columns =>
{
columns.Bound(x => x.Type);
columns.Bound(x => x.Status); #*This is my enum*#
})
.Filterable()
.DataSource(ds => ds
.Ajax()
.ServerOperation(true)
.Filter(filter => filter.Add(x => x.Status).IsEqualTo(MyEnum.Updated))
.Read(read => read.Action("QueryAlerts", "Alert"))))
The filter request on the AJAX POST is going across as Status~eq~'updated' and returns an Input string was not in a correct format error.
I removed the filtering on the data source and used the filtering controls to see how that request is normally passed which looks like this: Status~eq~2.
I've tried casting the filter values to integers (e.g. filter.Add(x => (int)x.Status).IsEqualTo((int)MyEnum.Updated)) and that results in an invalid cast error to Int32 from the model which is expected by the Add method.
Can this problem be solved using Razor or is this a JavaScript fix?
What data type is your x.Status? If it's an int then you don't need to cast it, only the enumeration:
filter.Add(x => x.Status).IsEqualTo((int)MyEnum.Updated)