File: Rendering\HtmlHelperSelectExtensions.cs
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Project: src\src\Mvc\Mvc.ViewFeatures\src\Microsoft.AspNetCore.Mvc.ViewFeatures.csproj (Microsoft.AspNetCore.Mvc.ViewFeatures)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Linq.Expressions;
using Microsoft.AspNetCore.Html;
 
namespace Microsoft.AspNetCore.Mvc.Rendering;
 
/// <summary>
/// Select-related extensions for <see cref="IHtmlHelper"/> and <see cref="IHtmlHelper{TModel}"/>.
/// </summary>
public static class HtmlHelperSelectExtensions
{
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on the <see cref="IHtmlHelper.ViewData"/> entry with full name. Adds a
    /// "selected" attribute to an &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name, or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance this method extends.</param>
    /// <param name="expression">Expression name, relative to the current model.</param>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// <para>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and <paramref name="expression"/> to set
    /// &lt;select&gt; element's "name" attribute. Sanitizes <paramref name="expression"/> to set element's "id"
    /// attribute.
    /// </para>
    /// <para>
    /// The <see cref="IHtmlHelper.ViewData"/> entry with full name must be a non-<c>null</c> collection of
    /// <see cref="SelectListItem"/> objects.
    /// </para>
    /// </remarks>
    public static IHtmlContent DropDownList(this IHtmlHelper htmlHelper, string expression)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
 
        return htmlHelper.DropDownList(expression, selectList: null, optionLabel: null, htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="optionLabel"/> and the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name. Adds a "selected" attribute to an &lt;option&gt; if its
    /// <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or <see cref="SelectListItem.Text"/> matches the
    /// first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name, or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance this method extends.</param>
    /// <param name="expression">Expression name, relative to the current model.</param>
    /// <param name="optionLabel">
    /// The text for a default empty item. Does not include such an item if argument is <c>null</c>.
    /// </param>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// <para>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and <paramref name="expression"/> to set
    /// &lt;select&gt; element's "name" attribute. Sanitizes <paramref name="expression"/> to set element's "id"
    /// attribute.
    /// </para>
    /// <para>
    /// The <see cref="IHtmlHelper.ViewData"/> entry with full name must be a non-<c>null</c> collection of
    /// <see cref="SelectListItem"/> objects.
    /// </para>
    /// </remarks>
    public static IHtmlContent DropDownList(
        this IHtmlHelper htmlHelper,
        string expression,
        string optionLabel)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
 
        return htmlHelper.DropDownList(
            expression,
            selectList: null,
            optionLabel: optionLabel,
            htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="selectList"/>. Adds a "selected" attribute to an
    /// &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name,
    /// the <see cref="IHtmlHelper.ViewData"/> entry with full name (unless used instead of
    /// <paramref name="selectList"/>), or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance this method extends.</param>
    /// <param name="expression">Expression name, relative to the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and <paramref name="expression"/> to set
    /// &lt;select&gt; element's "name" attribute. Sanitizes <paramref name="expression"/> to set element's "id"
    /// attribute.
    /// </remarks>
    public static IHtmlContent DropDownList(
        this IHtmlHelper htmlHelper,
        string expression,
        IEnumerable<SelectListItem> selectList)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
 
        return htmlHelper.DropDownList(expression, selectList, optionLabel: null, htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="selectList"/>. Adds a "selected" attribute to an
    /// &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name,
    /// the <see cref="IHtmlHelper.ViewData"/> entry with full name (unless used instead of
    /// <paramref name="selectList"/>), or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance this method extends.</param>
    /// <param name="expression">Expression name, relative to the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <param name="htmlAttributes">
    /// An <see cref="object"/> that contains the HTML attributes for the &lt;select&gt; element. Alternatively, an
    /// <see cref="IDictionary{String, Object}"/> instance containing the HTML attributes.
    /// </param>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and <paramref name="expression"/> to set
    /// &lt;select&gt; element's "name" attribute. Sanitizes <paramref name="expression"/> to set element's "id"
    /// attribute.
    /// </remarks>
    public static IHtmlContent DropDownList(
        this IHtmlHelper htmlHelper,
        string expression,
        IEnumerable<SelectListItem> selectList,
        object htmlAttributes)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
 
        return htmlHelper.DropDownList(expression, selectList, optionLabel: null, htmlAttributes: htmlAttributes);
    }
 
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="optionLabel"/> and <paramref name="selectList"/>. Adds a
    /// "selected" attribute to an &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name,
    /// the <see cref="IHtmlHelper.ViewData"/> entry with full name (unless used instead of
    /// <paramref name="selectList"/>), or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance this method extends.</param>
    /// <param name="expression">Expression name, relative to the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <param name="optionLabel">
    /// The text for a default empty item. Does not include such an item if argument is <c>null</c>.
    /// </param>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and <paramref name="expression"/> to set
    /// &lt;select&gt; element's "name" attribute. Sanitizes <paramref name="expression"/> to set element's "id"
    /// attribute.
    /// </remarks>
    public static IHtmlContent DropDownList(
        this IHtmlHelper htmlHelper,
        string expression,
        IEnumerable<SelectListItem> selectList,
        string optionLabel)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
 
        return htmlHelper.DropDownList(expression, selectList, optionLabel, htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="selectList"/>. Adds a "selected" attribute to an
    /// &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name, or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper{TModel}.NameFor"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper{TModel}"/> instance this method extends.</param>
    /// <param name="expression">An expression to be evaluated against the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <typeparam name="TModel">The type of the model.</typeparam>
    /// <typeparam name="TResult">The type of the <paramref name="expression"/> result.</typeparam>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and the string representation of the
    /// <paramref name="expression"/> to set &lt;select&gt; element's "name" attribute. Sanitizes the string
    /// representation of the <paramref name="expression"/> to set element's "id" attribute.
    /// </remarks>
    public static IHtmlContent DropDownListFor<TModel, TResult>(
        this IHtmlHelper<TModel> htmlHelper,
        Expression<Func<TModel, TResult>> expression,
        IEnumerable<SelectListItem> selectList)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
        ArgumentNullException.ThrowIfNull(expression);
 
        return htmlHelper.DropDownListFor(expression, selectList, optionLabel: null, htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="selectList"/>. Adds a "selected" attribute to an
    /// &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name, or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper{TModel}.NameFor"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper{TModel}"/> instance this method extends.</param>
    /// <param name="expression">An expression to be evaluated against the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <param name="htmlAttributes">
    /// An <see cref="object"/> that contains the HTML attributes for the &lt;select&gt; element. Alternatively, an
    /// <see cref="IDictionary{String, Object}"/> instance containing the HTML attributes.
    /// </param>
    /// <typeparam name="TModel">The type of the model.</typeparam>
    /// <typeparam name="TResult">The type of the <paramref name="expression"/> result.</typeparam>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and the string representation of the
    /// <paramref name="expression"/> to set &lt;select&gt; element's "name" attribute. Sanitizes the string
    /// representation of the <paramref name="expression"/> to set element's "id" attribute.
    /// </remarks>
    public static IHtmlContent DropDownListFor<TModel, TResult>(
        this IHtmlHelper<TModel> htmlHelper,
        Expression<Func<TModel, TResult>> expression,
        IEnumerable<SelectListItem> selectList,
        object htmlAttributes)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
        ArgumentNullException.ThrowIfNull(expression);
 
        return htmlHelper.DropDownListFor(
            expression,
            selectList,
            optionLabel: null,
            htmlAttributes: htmlAttributes);
    }
 
    /// <summary>
    /// Returns a single-selection HTML &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="optionLabel"/> and <paramref name="selectList"/>. Adds a
    /// "selected" attribute to an &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name, or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper{TModel}.NameFor"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper{TModel}"/> instance this method extends.</param>
    /// <param name="expression">An expression to be evaluated against the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <param name="optionLabel">
    /// The text for a default empty item. Does not include such an item if argument is <c>null</c>.
    /// </param>
    /// <typeparam name="TModel">The type of the model.</typeparam>
    /// <typeparam name="TResult">The type of the <paramref name="expression"/> result.</typeparam>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and the string representation of the
    /// <paramref name="expression"/> to set &lt;select&gt; element's "name" attribute. Sanitizes the string
    /// representation of the <paramref name="expression"/> to set element's "id" attribute.
    /// </remarks>
    public static IHtmlContent DropDownListFor<TModel, TResult>(
        this IHtmlHelper<TModel> htmlHelper,
        Expression<Func<TModel, TResult>> expression,
        IEnumerable<SelectListItem> selectList,
        string optionLabel)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
        ArgumentNullException.ThrowIfNull(expression);
 
        return htmlHelper.DropDownListFor(expression, selectList, optionLabel, htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a multi-selection &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on the <see cref="IHtmlHelper.ViewData"/> entry with full name. Adds a
    /// "selected" attribute to an &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name, or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance this method extends.</param>
    /// <param name="expression">Expression name, relative to the current model.</param>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// <para>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and <paramref name="expression"/> to set
    /// &lt;select&gt; element's "name" attribute. Sanitizes <paramref name="expression"/> to set element's "id"
    /// attribute.
    /// </para>
    /// <para>
    /// The <see cref="IHtmlHelper.ViewData"/> entry with full name must be a non-<c>null</c> collection of
    /// <see cref="SelectListItem"/> objects.
    /// </para>
    /// </remarks>
    public static IHtmlContent ListBox(this IHtmlHelper htmlHelper, string expression)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
 
        return htmlHelper.ListBox(expression, selectList: null, htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a multi-selection &lt;select&gt; element for the <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="selectList"/>. Adds a "selected" attribute to an
    /// &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name,
    /// the <see cref="IHtmlHelper.ViewData"/> entry with full name (unless used instead of
    /// <paramref name="selectList"/>), or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper"/> instance this method extends.</param>
    /// <param name="expression">Expression name, relative to the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and <paramref name="expression"/> to set
    /// &lt;select&gt; element's "name" attribute. Sanitizes <paramref name="expression"/> to set element's "id"
    /// attribute.
    /// </remarks>
    public static IHtmlContent ListBox(
        this IHtmlHelper htmlHelper,
        string expression,
        IEnumerable<SelectListItem> selectList)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
 
        return htmlHelper.ListBox(expression, selectList, htmlAttributes: null);
    }
 
    /// <summary>
    /// Returns a multi-selection &lt;select&gt; element for the  <paramref name="expression"/>. Adds
    /// &lt;option&gt; elements based on <paramref name="selectList"/>. Adds a "selected" attribute to an
    /// &lt;option&gt; if its <see cref="SelectListItem.Value"/> (if non-<c>null</c>) or
    /// <see cref="SelectListItem.Text"/> matches the first non-<c>null</c> value found in:
    /// the <see cref="ActionContext.ModelState"/> entry with full name, or
    /// the <paramref name="expression"/> evaluated against <see cref="ViewFeatures.ViewDataDictionary.Model"/>.
    /// See <see cref="IHtmlHelper.Name"/> for more information about a "full name".
    /// </summary>
    /// <param name="htmlHelper">The <see cref="IHtmlHelper{TModel}"/> instance this method extends.</param>
    /// <param name="expression">An expression to be evaluated against the current model.</param>
    /// <param name="selectList">
    /// A collection of <see cref="SelectListItem"/> objects used to populate the &lt;select&gt; element with
    /// &lt;optgroup&gt; and &lt;option&gt; elements. If <c>null</c>, uses the <see cref="IHtmlHelper.ViewData"/>
    /// entry with full name and that entry must be a collection of <see cref="SelectListItem"/> objects.
    /// </param>
    /// <typeparam name="TModel">The type of the model.</typeparam>
    /// <typeparam name="TResult">The type of the <paramref name="expression"/> result.</typeparam>
    /// <returns>A new <see cref="IHtmlContent"/> containing the &lt;select&gt; element.</returns>
    /// <remarks>
    /// Combines <see cref="ViewFeatures.TemplateInfo.HtmlFieldPrefix"/> and the string representation of the
    /// <paramref name="expression"/> to set &lt;select&gt; element's "name" attribute. Sanitizes the string
    /// representation of the <paramref name="expression"/> to set element's "id" attribute.
    /// </remarks>
    public static IHtmlContent ListBoxFor<TModel, TResult>(
        this IHtmlHelper<TModel> htmlHelper,
        Expression<Func<TModel, TResult>> expression,
        IEnumerable<SelectListItem> selectList)
    {
        ArgumentNullException.ThrowIfNull(htmlHelper);
        ArgumentNullException.ThrowIfNull(expression);
 
        return htmlHelper.ListBoxFor(expression, selectList, htmlAttributes: null);
    }
}