I want to show of summation a column in the kendo grid and I did it with aggregate (Telerik).
but the aggregate result always is null. should I do anything else?
Here is the code
gridBuilder.DataSource(dataSource => dataSource
.Ajax()
.Read(read => read.Action(actionName, controller, listInputModel))
.PageSize(20)
.Model(model => model.Id(p => p.Id))
.Aggregates(a=>a.Add(p=>p.lenght).Sum())
.Destroy(delete => delete.Action("Delete", controller)));
Related
#(Html.Kendo().Grid<...>()
.Columns(columns =>
{
columns.Bound(j => j.Type);
columns.Bound(j => j.Code);
})
.Sortable(s => s.Enabled(true))
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(20)
.Sort(p => { p.Add("Code").Ascending(); p.Add("Type").Ascending(); })
.Model(model => model.Id(j => j.ID))
.Read(...)
.ServerOperation(true)
)
)
I have a Kendo MVC Grid as above and want to sort it first by type, then by code.
I have found such implementation on official Telerik forum: Default Grid Sorting
However it seems it fails to work...
The records are sorted by two columns, and apparently it is sorted by Type, but it fails to sort by Code afterwards...As Default should after CG...
What am I missing and how can I fix the problem?
For anyone else looking for a solution, using the model property names worked for me, i.e.
.Sort(s =>
{
s.Add("Code").Ascending();
s.Add("Type").Ascending();
})
Try this way
.Sort(p=> {p.Add(s=>s.Code).Ascending(); p.Add(s=>s.Type).Ascending();})
I have a Kendo UI GRID (MVC) with 100+ columns.
Not all the columns are visible on load. The default columns visible are 10.
There are checkboxes on the page, next to the grid, which list all the columns. If you click on a checkbox, depending on whether it is checked or unchecked, the column appears or is hidden.
The trouble is that the grid takes almost 20 seconds to render, when the number of rows is also huge (and the time increases).
What is the best way to handle a large number of columns?
I think that bring all the 100 columns for a record is not the best way to work. Maybe you must most important information (10 column at max) for all the records and have a detailed view (with the rest of the information for the specific record you want to inspect)
If you want to see a more detailed example take a look here
my approach is the following
#(Html.Kendo().Grid<YOURCLASS>()
.Name("grid")
.Columns(columns =>
{
columns.Bound(e => e.imporantColumn1);
columns.Bound(e => e.imporantColumn2);
columns.Bound(e => e.imporantColumn3);
})
.Sortable()
.Pageable()
.Scrollable()
.ClientDetailTemplateId("template")
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(5)
.Read(read => read.Action("HierarchyBinding_theBasicData", "Grid"))
)
.Events(events => events.DataBound("dataBound"))
)
and a detailed template
<script id="template" type="text/kendo-tmpl">
#(Html.Kendo().TabStrip()
.Name("tabStrip_#=ID#")
.SelectedIndex(0)
.Items(items =>
{
items.Add().Text("details").Content(#<text>
#(Html.Kendo().Grid<YOURCLASS>()
.Name("grid_#=ID#")
.Columns(columns =>
{
// the order columns
})
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(5)
.Read(read => read.Action("HierarchyBinding_theRestOfInfo", "Grid", new { ID= "#=ID#" }))
)
.Pageable()
.Sortable()
.ToClientTemplate())
</text>
);
})
.ToClientTemplate())
</script>
Hello I am new to Kendo UI, And I have the same question as Kendo UI Foreign Key
but, I cannot grasp the point of the answer. About the Foreign Key, can you tell me about step by step of accessing Foreign Key in the Grid. if you provide me with your example, that would be great!
Thank you for your help.. :))
There is a good documentation with Examples available each component wise in Kendo UI itself. Here is sample about the Foreign Key in the Grid.
In this sample they have two tables category and products. By clicking on the "Add new record" you can add the products based on the "Category" wise. Here the "foreign key relationship" is needed, to identify what are the products comes under which category.
Based on this relationship they add and delete the specific products. This is just to categorize the products rather than mixing all the products.
Sample: see my commented explanations.
#(Html.Kendo().Grid<Kendo.Mvc.Examples.Models.ProductViewModel>()
.Name("grid")
.Columns(columns => // Fetch available categorizes from the table. which will have the relation ship with products table.
{
columns.Bound(p => p.ProductName);
columns.ForeignKey(p => p.CategoryID, // Creating the relationship here
(System.Collections.IEnumerable)ViewData["categories"], "CategoryID", "CategoryName")
.Title("Category").Width(150);
columns.Bound(p => p.UnitPrice).Width(150);
columns.Command(command => command.Destroy()).Width(110);
})
.Editable(editable => editable.Mode(GridEditMode.InCell))
.Filterable()
.Groupable()
.Pageable()
.Scrollable()
.HtmlAttributes(new { style = "height:430px;" })
.DataSource(dataSource => dataSource
.Ajax()
.Batch(true)
.PageSize(20)
.ServerOperation(false)
.Events(events => events.Error("errorHandler"))
.Model(model =>
{
model.Id(p => p.ProductID); // Get/set unique id for the product
model.Field(p => p.ProductID).Editable(false); // 1st column editable. since we are going to add product names.
model.Field(p => p.CategoryID).DefaultValue(1); // Makes default category selection.
})
.Read(read => read.Action("ForeignKeyColumn_Read", "Grid"))
.Update(update => update.Action("ForeignKeyColumn_Update", "Grid"))
.Create(create => create.Action("ForeignKeyColumn_Create", "Grid"))
.Destroy(destroy => destroy.Action("ForeignKeyColumn_Destroy", "Grid"))
)
)
hope i have given enough information. :)
I have an ASP.NET MVC Telerik Grid (not Kendo). I have a grid with two columns. The first column is a drop down list of items I can select from, and the second column is just an editable textbox.
I want to set the first column to READ ONLY on edits, meaning I can only edit the second column but not the first column. I set the first column to read only in both the model ([ReadOnly] tag in the model class) and in the view (i.e. Editable(false)).
When I do this, I'm not allowed to edit the first column in edit mode like I want. However, when I go to insert/create a new record... the first column is blank and I can only enter values for the second column.
I've tried everything and looked around, but couldn't find a solution.
try this :
model.Field(p => p.Name).Editable(false)
Example:
#(Html.Kendo().Grid<OrderViewModel>()
.Name("grid")
.Columns(columns =>
{
columns.Bound(p => p.Id).Sortable(false).Visible(false);
columns.Bound(p => p.Name);
columns.Bound(p => p.Notes);
columns.Command(command => { command.Edit(); }).Width(172);
})
.Pageable()
.Sortable()
.Scrollable()
.Filterable()
.HtmlAttributes(new { style = "height:550px;" })
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(20)
.Read(read => read.Action("Orders_Read", "Grid"))
.Model(model => {
model.Id(p => p.Id);
model.Field(p => p.Name).Editable(false);
})
.Update(update => update.Action("EditingInline_Update", "Grid"))
)
)
Ref: http://docs.telerik.com/kendo-ui/aspnet-mvc/helpers/grid/configuration#model
I had a similar issue with a text field. I solved it by hooking the Edit event.
#Html.Kendo().Grid<MyViewModel>()...Events(e => e.Edit("onGridEdit"))
<script type="text/javascript">
function onGridEdit(e) {
if (!e.model.isNew())
e.container.find('input#ID').prop('disabled', true);
}
</script>
In this example I wanted my ID field to be unchangeable after it's created. Your mileage and jQuery may vary, but I suspect the solution would be similar.
TL;DR;
If you are using grid template columns, keep the EditItemTemplate empty as follows:
<telerik:GridTemplateColumn DataField="opt_id" UniqueName="opt_id" DataType="System.Int32">
<ItemTemplate>
<telerik:RadLabel Text='<%# DataBinder.Eval(Container.DataItem, "opt_id") %>' runat="server" />
</ItemTemplate>
<EditItemTemplate></EditItemTemplate>
</telerik:GridTemplateColumn>
So by using above, when entered into edit mode, the item will still be read only.
A little background on how my grid works:
My grid is making use of .Sortable(), .Reorderable(), .Filterable() and .ColumnMenu(). On the dataBound event, the grid saves the state of the grid (column order, items per page, current pagination page, and column sorting [asc and desc]). This is so when a user comes back to that page, their settings are reloaded in the grid when some initializing Javascript makes a query on the grid.
My issue comes into play when I have the same data for two columns:
#(Html.Kendo().Grid<GridDataType>()
.Name("ActiveThreats_Grid")
.AutoBind(false)
.Columns(columns =>
{
columns.Bound(r => r.Id).Title("<input id='checkAll', type='checkbox', class='check-box' />")
.Sortable(false)
.ClientTemplate("<input type='checkbox' class='check_row' id='#= Id#' />")
.Filterable(false);
columns.Bound(r => r.OtherField).Title("Other Field");
columns.Bound(r => r.Id).Title("ID").Hidden(true);
})
.Resizable(resize => resize.Columns(true))
.Scrollable()
.Sortable()
.Reorderable(reorder => reorder.Columns(true))
.Filterable()
.ColumnMenu()
.DataSource(dataSource => dataSource
.Ajax()
// Other HtmlHelpers here
)
What I've noticed, is if I have the same data-field attribute and I am using the .Reorderable() HtmlHelper, the grid reorders the first r.Id column to the same position where the second r.Id column appears.
Q: Is there an HtmlHelper or way to change the data-field attribute output to prevent .Reorderable() from ordering the two identical columns next to each other?