public static IHtmlContent GenerateHtml <TModel, TProperty>(
IHtmlHelper <TModel> htmlHelper,
Expression <Func <TModel, TProperty> > propertyLambdaExpression,
FieldsetViewModel fieldsetOptions = null,
HintViewModel hintOptions = null)
where TModel : GovUkViewModel
{
PropertyInfo property = ExpressionHelpers.GetPropertyFromExpression(propertyLambdaExpression);
ThrowIfPropertyTypeIsNotNullableEnum(property);
string propertyName = property.Name;
TModel model = htmlHelper.ViewData.Model;
TProperty currentlySelectedValue =
ExpressionHelpers.GetPropertyValueFromModelAndExpression(model, propertyLambdaExpression);
Type enumType = Nullable.GetUnderlyingType(typeof(TProperty));
Array allEnumValues = Enum.GetValues(enumType);
List <ItemViewModel> radios = allEnumValues
.OfType <object>()
.Select(enumValue =>
{
bool isEnumValueCurrentlySelected = enumValue.ToString() == currentlySelectedValue.ToString();
string radioLabelText = GetRadioLabelText(enumType, enumValue);
return(new RadioItemViewModel
{
Value = enumValue.ToString(),
Id = $"GovUk_Radio_{propertyName}_{enumValue}",
Checked = isEnumValueCurrentlySelected,
Label = new LabelViewModel
{
Text = radioLabelText
}
});
})
.Cast <ItemViewModel>()
.ToList();
var radiosViewModel = new RadiosViewModel
{
Name = $"GovUk_Radio_{propertyName}",
IdPrefix = $"GovUk_{propertyName}",
Items = radios,
Fieldset = fieldsetOptions,
Hint = hintOptions
};
if (model.HasErrorFor(property))
{
radiosViewModel.ErrorMessage = new ErrorMessageViewModel
{
Text = model.GetErrorFor(property)
};
}
return(htmlHelper.Partial("/GovUkDesignSystemComponents/Radios.cshtml", radiosViewModel));
}
public static IHtmlContent GovUkRadiosFor <TModel, TProperty>(
this IHtmlHelper <TModel> htmlHelper,
Expression <Func <TModel, TProperty> > propertyLambdaExpression,
FieldsetViewModel fieldsetOptions = null,
HintViewModel hintOptions = null)
where TModel : GovUkViewModel
{
return(RadiosHtmlGenerator.GenerateHtml(
htmlHelper,
propertyLambdaExpression,
fieldsetOptions,
hintOptions));
}
public static IHtmlContent GovUkCheckboxesFor <TModel, TPropertyListItem>(
this IHtmlHelper <TModel> htmlHelper,
Expression <Func <TModel, List <TPropertyListItem> > > propertyLambdaExpression,
FieldsetViewModel fieldsetOptions = null,
HintViewModel hintOptions = null,
Dictionary <TPropertyListItem, Func <object, object> > conditionalOptions = null
)
where TModel : GovUkViewModel
where TPropertyListItem : struct, IConvertible // A fairly good check that TPropertyListItem is an Enum
{
return(CheckboxesHtmlGenerator.GenerateHtml(
htmlHelper,
propertyLambdaExpression,
fieldsetOptions,
hintOptions,
conditionalOptions));
}
public static IHtmlContent GovUkRadiosFor <TModel, TProperty>(
this IHtmlHelper <TModel> htmlHelper,
Expression <Func <TModel, TProperty> > propertyLambdaExpression,
FieldsetViewModel fieldsetOptions = null,
HintViewModel hintOptions = null,
Dictionary <TProperty, LabelViewModel> itemLabelOptions = null,
Dictionary <TProperty, HintViewModel> itemHintOptions = null,
string classes = null,
Dictionary <TProperty, Func <object, object> > conditionalOptions = null)
where TModel : GovUkViewModel
{
return(RadiosHtmlGenerator.GenerateHtml(
htmlHelper,
propertyLambdaExpression,
fieldsetOptions,
hintOptions,
itemLabelOptions,
itemHintOptions,
conditionalOptions,
classes));
}
public static IHtmlContent GovUkFieldset(
this IHtmlHelper htmlHelper,
FieldsetViewModel fieldsetViewModel)
{
return(htmlHelper.Partial("/GovUkDesignSystemComponents/Fieldset.cshtml", fieldsetViewModel));
}
public static IHtmlContent GenerateHtml <TModel, TPropertyListItem>(
IHtmlHelper <TModel> htmlHelper,
Expression <Func <TModel, List <TPropertyListItem> > > propertyLambdaExpression,
FieldsetViewModel fieldsetOptions = null,
HintViewModel hintOptions = null,
Dictionary <TPropertyListItem, Func <object, object> > conditionalOptions = null)
where TModel : GovUkViewModel
where TPropertyListItem : struct, IConvertible
{
PropertyInfo property = ExpressionHelpers.GetPropertyFromExpression(propertyLambdaExpression);
ThrowIfPropertyTypeIsNotListOfEnums <TPropertyListItem>(property);
string propertyName = property.Name;
TModel model = htmlHelper.ViewData.Model;
List <TPropertyListItem> currentlySelectedValues =
ExpressionHelpers.GetPropertyValueFromModelAndExpression(model, propertyLambdaExpression);
List <TPropertyListItem> allEnumValues =
Enum.GetValues(typeof(TPropertyListItem))
.Cast <TPropertyListItem>()
.ToList();
List <ItemViewModel> checkboxes = allEnumValues
.Select(enumValue =>
{
var isEnumValueInListOfCurrentlySelectedValues =
currentlySelectedValues != null && currentlySelectedValues.Contains(enumValue);
string checkboxLabelText = GetCheckboxLabelText(enumValue);
var checkboxItemViewModel = new CheckboxItemViewModel
{
Value = enumValue.ToString(),
Id = $"GovUk_Checkbox_{propertyName}_{enumValue}",
Checked = isEnumValueInListOfCurrentlySelectedValues,
Label = new LabelViewModel
{
Text = checkboxLabelText
}
};
if (conditionalOptions != null && conditionalOptions.TryGetValue(enumValue, out Func <object, object> conditionalHtml))
{
checkboxItemViewModel.Conditional = new Conditional {
Html = conditionalHtml
};
}
return(checkboxItemViewModel);
})
.Cast <ItemViewModel>()
.ToList();
var checkboxesViewModel = new CheckboxesViewModel
{
Name = $"GovUk_Checkbox_{propertyName}",
IdPrefix = $"GovUk_{propertyName}",
Items = checkboxes,
Fieldset = fieldsetOptions,
Hint = hintOptions
};
if (model.HasErrorFor(property))
{
checkboxesViewModel.ErrorMessage = new ErrorMessageViewModel
{
Text = model.GetErrorFor(property)
};
}
return(htmlHelper.Partial("/GovUkDesignSystemComponents/Checkboxes.cshtml", checkboxesViewModel));
}
public static IHtmlContent GovUkFieldset(
this IHtmlHelper htmlHelper,
FieldsetViewModel fieldsetViewModel)
{
return(htmlHelper.Partial("~/Partials/Fieldset.cshtml", fieldsetViewModel));
}
