ListBox25

ListBox25 is a reusable ASP.NET helper control used to render single-select and multi-select list boxes using standard <select> elements. It supports labels, required indicators, Select2 integration, auto postback, JavaScript callbacks, and configurable widths.

Key Features

• Single and multiple selection list boxes
• Label with required (*) indicator
• Predefined and custom widths
• Select2 CSS class integration
• Auto postback support
• JavaScript callback on change

Public Enums

ListBoxType

Size

SimpleListBox

SimpleListBox is used to render a single-selection dropdown list.

Properties

Sample Code – SimpleListBox

var listBox = new ListBox25.SimpleListBox
{
    ControlId = "Country",
    Label = "Country",
    IsRequired = true,
    ValueList = new List { "India", "USA", "UK" },
    SelectedValue = "India",
    Size = ListBox25.Size.S3
};

@ListBox25.GetHtml(listBox)

MultiListBox

MultiListBox is used to render a multi-selection list box.

Properties

Example – MultiListBox

var multiListBox = new ListBox25.MultiListBox
{
    ControlId = "Roles",
    Label = "User Roles",
    ValueList = new List { "Admin", "Editor", "Viewer" },
    SelectedValues = new List { "Admin", "Viewer" },
    Size = ListBox25.Size.Max
};

@ListBox25.GetHtml(multiListBox)