private static IHtmlContent RenderBootstrapFormCheck <TModel>(this IHtmlHelper <TModel> helper,
Expression <Func <TModel, bool> > expression,
FormCheckType formCheckType = FormCheckType.CheckBox,
string?label = null,
string?additionalCssClass = null)
{
var inputTag = new TagBuilder("input")
{
TagRenderMode = TagRenderMode.SelfClosing
};
inputTag.Attributes.Add("id", helper.IdFor(expression));
inputTag.Attributes.Add("name", helper.NameFor(expression));
inputTag.Attributes.Add("type", "checkbox");
inputTag.Attributes.Add("value", "true");
if (helper.ViewData.Model != null)
{
try {
var value = expression.Compile().Invoke(helper.ViewData.Model);
if (value)
{
inputTag.Attributes.Add("checked", "checked");
}
}
catch (NullReferenceException) { }
catch { throw; }
}
var formCheck = BootstrapFormCheck(inputTag, formCheckType, label ?? helper.DisplayNameFor(expression), additionalCssClass);
return(new HtmlString(formCheck));
}
private static IHtmlContent RenderBootstrapFormCheckGroup <TModel, TResult>(this IHtmlHelper <TModel> helper,
Expression <Func <TModel, TResult> > expression,
FormCheckType formCheckType,
IEnumerable <SelectListItem> selectListItems,
LayoutDirection layoutDirection = LayoutDirection.Horizontal,
object?htmlAttributes = null)
{
var result = new HtmlContentBuilder();
foreach (var item in selectListItems)
{
var inputTag = new TagBuilder("input")
{
TagRenderMode = TagRenderMode.SelfClosing
};
inputTag.Attributes.Add("id", "_" + Crypto.RandomString());
inputTag.Attributes.Add("name", helper.NameFor(expression));
inputTag.Attributes.Add("value", item.Value);
inputTag.Attributes.Add("type", formCheckType == FormCheckType.Switch ? "checkbox" : formCheckType.ToLower());
if (item.Selected)
{
inputTag.Attributes.Add("checked", "checked");
}
inputTag.MergeAttributes(htmlAttributes);
var additionalCssClass = (layoutDirection == LayoutDirection.Horizontal ? "form-check-inline custom-control-inline" : "");
var formCheck = BootstrapFormCheck(inputTag, formCheckType, item.Text, additionalCssClass);
result.AppendHtml(formCheck);
}
return(result);
}
private static string BootstrapFormCheck(TagBuilder inputTag, FormCheckType formCheckType, string?label, string?additionalCssClass = null)
{
if (!inputTag.Attributes.TryGetValue("class", out var cssClass) || !cssClass.Contains("form-check-input"))
{
inputTag.AddCssClass("form-check-input");
inputTag.AddCssClass("custom-control-input");
}
return($@"<div class='form-check {(formCheckType == FormCheckType.Switch ? "form-switch" : "")} custom-control custom-{formCheckType.ToLower()} {additionalCssClass}'>
{inputTag.ToHtml()}
<label class='form-check-label custom-control-label' for='{inputTag.Attributes.GetValueOrDefault("id")}'>{label}</span>
</div>" );
}
