MultiColumnComboBox in Razor Pages
Razor Pages is an alternative to the MVC pattern that makes page-focused coding easier and more productive. This approach consists of a cshtml file and a cshtml.cs file (by design, the two files have the same name).
You can seamlessly integrate the Telerik UI MultiColumnComboBox for ASP.NET Core in Razor Pages applications.
This article describes how to configure the MultiColumnComboBox component in a Razor Pages scenario.
For the complete project, refer to the MultiColumnComboBox in Razor Pages example.
In order to set up the MultiColumnComboBox component bindings, you need to configure the Read method of its DataSource instance. The URL in this method should refer the name of the method in the PageModel. In this method, you can also pass additional parameters, such as filter string and antiforgery token (see dataFunction).
@inject Microsoft.AspNetCore.Antiforgery.IAntiforgery Xsrf
@Html.AntiForgeryToken()
<h1>MultiColumnComboBox Index</h1>
@(Html.Kendo().MultiColumnComboBox()
.Name("products")
.DataTextField("ShipName")
.DataValueField("ShipCity")
.Filter(FilterType.Contains)
.Columns(columns =>
{
columns.Add().Field("ShipName").Title("Ship Name").Width("200px");
columns.Add().Field("ShipCity").Title("Ship City").Width("200px");
columns.Add().Field("Freight").Title("Freight").Width("200px");
})
.DataSource(ds => ds
.Custom()
.Transport(transport => transport
.Read(r => r
.Url("/MultiColumnComboBox/MultiColumnComboBoxIndex?handler=Read").Data("dataFunction")
))
.ServerFiltering(true)
)
)
<script>
function dataFunction(e) {
var filterValue = '';
if (e.filter.filters[0]) {
filterValue = e.filter.filters[0].value;
}
return {
__RequestVerificationToken: kendo.antiForgeryTokens().__RequestVerificationToken,
filterValue: filterValue
};
}
</script>
@inject Microsoft.AspNetCore.Antiforgery.IAntiforgery Xsrf
@Html.AntiForgeryToken()
<h1>MultiColumnComboBox Index</h1>
<kendo-multicolumncombobox name="products" datatextfield="ShipName" datavaluefield="ShipCity" filter="FilterType.Contains">
<multicolumncombobox-columns>
<column field="ShipName" title="Ship Name" width="200px">
</column>
<column field="ShipCity" title="Ship City" width="200px">
</column>
<column field="Freight" title="Freight" width="200px">
</column>
</multicolumncombobox-columns>
<datasource type="DataSourceTagHelperType.Custom" server-filtering="true">
<transport>
<read url="@Url.Page("/MultiColumnComboBox/MultiColumnComboBoxIndex?handler=Read")" data="dataFunction" />
</transport>
</datasource>
</kendo-multicolumncombobox>
<script>
function dataFunction(e) {
var filterValue = '';
if (e.filter.filters[0]) {
filterValue = e.filter.filters[0].value;
}
return {
__RequestVerificationToken: kendo.antiForgeryTokens().__RequestVerificationToken,
filterValue: filterValue
};
}
</script>
public JsonResult OnGetRead(string filterValue)
{
if (filterValue != null)
{
var filteredData = orders.Where(p => p.ShipName.Contains(filterValue));
return new JsonResult(filteredData);
}
return new JsonResult(orders);
}