AutoCompleteBoxPropertiesBase.CallbackPageSize Property

Specifies the number of items that the control returns from the server on each callback.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v24.2.dll

Declaration

C#

[DefaultValue(100)]
public int CallbackPageSize { get; set; }

VB.NET

<DefaultValue(100)>
Public Property CallbackPageSize As Integer

Property Value

Type	Default	Description
Int32	100	The number of items.

Remarks

The control loads the number of items specified in the CallbackPageSize property on the initial page load and on subsequent callback requests to the server. For instance, the editor can load items as a user scrolls the list. This number should be greater than or equal to the AutoCompleteBoxPropertiesBase.DropDownRows property value.

This property is in effect if the AutoCompleteBoxPropertiesBase.EnableCallbackMode property is set to true.

Note

The CallbackPageSize property synchronizes its value with the value of the editor’s ASPxAutoCompleteBoxBase.CallbackPageSize property.

Web Forms approach:

ASPX

<dx:ASPxGridView ID="Grid" runat="server" DataSourceID="SqlDataSource1">
    <Columns>
        <dx:GridViewDataComboBoxColumn FieldName="Orders.ShipName">
            <PropertiesComboBox EnableCallbackMode="true" CallbackPageSize="30" />
        </dx:GridViewDataComboBoxColumn>
        <!-- ... -->
    </Columns>
</dx:ASPxGridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ...></asp:SqlDataSource>

Run Demo: Callback Mode

MVC approach:

Razor (View)

@Html.DevExpress().GridView(settings => {
    settings.Name = "grid";   
    settings.Columns.Add(column => {
        column.FieldName = "ShipID";
        column.ColumnType = MVCxGridViewColumnType.ComboBox;
        column.EditorProperties().ComboBox(p => {
            p.CallbackRouteValues = new { Controller = "Home", Action = "ShipsComboBox" };
            p.ValueField = "ShipID";
            p.TextField = "ShipName";
            p.ValueType = typeof(int);
            p.CallbackPageSize = 30;
            p.BindList(MySolution.Models.DataProvider.GetShipName());
        });
    });
}).Bind(Model).GetHtml()

Run Demo: MVC Combo Box - Features

View Example: MVC ComboBox Extension - Cascading Combo Boxes

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the CallbackPageSize property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

asp-net-mvc-grid-cascading-combo-boxes-in-batch-edit-mode/CS/Models/ComboBoxPropertiesProvider.cs#L77

cs.FilterMinLength = 2;
cs.CallbackPageSize = 20;
cs.ClientSideEvents.SelectedIndexChanged = "CountriesCombo_SelectedIndexChanged";

asp-net-mvc-grid-cascading-combo-boxes-in-edit-form/CS/Models/ComboBoxPropertiesProvider.cs#L77

cs.FilterMinLength = 2;
cs.CallbackPageSize = 20;
cs.ClientSideEvents.SelectedIndexChanged = "CountriesCombo_SelectedIndexChanged";

asp-net-mvc-grid-combobox-column-in-callback-mode/CS/Helpers/CallbackComboBoxHelper.cs#L18

p.ValueType = typeof(int);
p.CallbackPageSize = 20;
p.DropDownStyle = DropDownStyle.DropDown;

VB.NET

asp-net-mvc-grid-cascading-combo-boxes-in-batch-edit-mode/VB/Models/ComboBoxPropertiesProvider.vb#L70

cs.FilterMinLength = 2
cs.CallbackPageSize = 20
cs.ClientSideEvents.SelectedIndexChanged = "CountriesCombo_SelectedIndexChanged"

asp-net-mvc-grid-cascading-combo-boxes-in-edit-form/VB/Models/ComboBoxPropertiesProvider.vb#L70

cs.FilterMinLength = 2
cs.CallbackPageSize = 20
cs.ClientSideEvents.SelectedIndexChanged = "CountriesCombo_SelectedIndexChanged"

asp-net-mvc-grid-combobox-column-in-callback-mode/VB/Helpers/CallbackComboBoxHelper.vb#L21

p.ValueType = GetType(Integer)
p.CallbackPageSize = 20
p.DropDownStyle = DropDownStyle.DropDown