// Helper methods #region Common Helpers private static MvcHtmlString InputHelper(HtmlHelper htmlHelper, InputType inputType, ModelMetadata metadata, string name, object value, bool useViewData, bool isChecked, bool setId, bool isExplicitValue, string format, IDictionary <string, object> htmlAttributes) { //string fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name); string fullName = name; if (String.IsNullOrEmpty(fullName)) { throw new ArgumentException(MvcResources.Common_NullOrEmpty, "name"); } TagBuilder tagBuilder = new TagBuilder("input"); tagBuilder.MergeAttributes(htmlAttributes); tagBuilder.MergeAttribute("type", HtmlHelper.GetInputTypeString(inputType)); tagBuilder.MergeAttribute("name", fullName, true); string valueParameter = htmlHelper.FormatValue(value, format); bool usedModelState = false; switch (inputType) { case InputType.CheckBox: bool?modelStateWasChecked = htmlHelper.GetModelStateValue(fullName, typeof(bool)) as bool?; if (modelStateWasChecked.HasValue) { isChecked = modelStateWasChecked.Value; usedModelState = true; } goto case InputType.Radio; case InputType.Radio: if (!usedModelState) { string modelStateValue = htmlHelper.GetModelStateValue(fullName, typeof(string)) as string; if (modelStateValue != null) { isChecked = String.Equals(modelStateValue, valueParameter, StringComparison.Ordinal); usedModelState = true; } } if (!usedModelState && useViewData) { isChecked = htmlHelper.EvalBoolean(fullName); } if (isChecked) { tagBuilder.MergeAttribute("checked", "checked"); } tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue); break; case InputType.Password: if (value != null) { tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue); } break; default: string attemptedValue = (string)htmlHelper.GetModelStateValue(fullName, typeof(string)); tagBuilder.MergeAttribute("value", attemptedValue ?? ((useViewData) ? htmlHelper.EvalString(fullName, format) : valueParameter), isExplicitValue); break; } if (setId) { tagBuilder.GenerateId(fullName); } // If there are any errors for a named field, we add the css attribute. if (htmlHelper.HasFieldError(fullName)) { tagBuilder.AddCssClass(HtmlHelper.ValidationInputCssClassName); } tagBuilder.MergeAttributes(htmlHelper.GetUnobtrusiveValidationAttributes(name, metadata)); if (inputType == InputType.CheckBox) { // Render an additional <input type="hidden".../> for checkboxes. This // addresses scenarios where unchecked checkboxes are not sent in the request. // Sending a hidden input makes it possible to know that the checkbox was present // on the page when the request was submitted. StringBuilder inputItemBuilder = new StringBuilder(); inputItemBuilder.Append(tagBuilder.ToString(TagRenderMode.SelfClosing)); TagBuilder hiddenInput = new TagBuilder("input"); hiddenInput.MergeAttribute("type", HtmlHelper.GetInputTypeString(InputType.Hidden)); hiddenInput.MergeAttribute("name", fullName); hiddenInput.MergeAttribute("value", "false"); inputItemBuilder.Append(hiddenInput.ToString(TagRenderMode.SelfClosing)); return(MvcHtmlString.Create(inputItemBuilder.ToString())); } return(tagBuilder.ToHtmlString(TagRenderMode.SelfClosing)); }
// Only render attributes if unobtrusive client-side validation is enabled, and then only if we've // never rendered validation for a field with this name in this form. Also, if there's no form context, // then we can't render the attributes (we'd have no <form> to attach them to). public IDictionary <string, object> GetUnobtrusiveValidationAttributes(string name, ModelMetadata metadata) { Dictionary <string, object> results = new Dictionary <string, object>(); //TODO: Awaiting implementation of ViewContext setter /* * // The ordering of these 3 checks (and the early exits) is for performance reasons. * if (!ViewContext.UnobtrusiveJavaScriptEnabled) { * return results; * } * * FormContext formContext = ViewContext.GetFormContextForClientValidation(); * if (formContext == null) { * return results; * } * * string fullName = ViewData.TemplateInfo.GetFullHtmlFieldName(name); * if (formContext.RenderedField(fullName)) { * return results; * } * * formContext.RenderedField(fullName, true); * * IEnumerable<ModelClientValidationRule> clientRules = ClientValidationRuleFactory(name, metadata); * UnobtrusiveValidationAttributesGenerator.GetValidationAttributes(clientRules, results); */ return(results); }
private static MvcHtmlString SelectInternal(this HtmlHelper htmlHelper, ModelMetadata metadata, string optionLabel, string name, IEnumerable <SelectListItem> selectList, bool allowMultiple, IDictionary <string, object> htmlAttributes) { //string fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name); string fullName = name; if (String.IsNullOrEmpty(fullName)) { throw new ArgumentException(MvcResources.Common_NullOrEmpty, "name"); } bool usedViewData = false; // If we got a null selectList, try to use ViewData to get the list of items. if (selectList == null) { selectList = htmlHelper.GetSelectData(name); usedViewData = true; } object defaultValue = (allowMultiple) ? htmlHelper.GetModelStateValue(fullName, typeof(string[])) : htmlHelper.GetModelStateValue(fullName, typeof(string)); // If we haven't already used ViewData to get the entire list of items then we need to // use the ViewData-supplied value before using the parameter-supplied value. if (!usedViewData && defaultValue == null && !String.IsNullOrEmpty(name)) { defaultValue = htmlHelper.ViewData.Eval(name); } if (defaultValue != null) { selectList = GetSelectListWithDefaultValue(selectList, defaultValue, allowMultiple); } // Convert each ListItem to an <option> tag StringBuilder listItemBuilder = StringBuilderCache.Allocate(); // Make optionLabel the first item that gets rendered. if (optionLabel != null) { listItemBuilder.AppendLine(ListItemToOption(new SelectListItem() { Text = optionLabel, Value = String.Empty, Selected = false })); } foreach (SelectListItem item in selectList) { listItemBuilder.AppendLine(ListItemToOption(item)); } TagBuilder tagBuilder = new TagBuilder("select") { InnerHtml = StringBuilderCache.ReturnAndFree(listItemBuilder) }; tagBuilder.MergeAttributes(htmlAttributes); tagBuilder.MergeAttribute("name", fullName, true /* replaceExisting */); tagBuilder.GenerateId(fullName); if (allowMultiple) { tagBuilder.MergeAttribute("multiple", "multiple"); } // If there are any errors for a named field, we add the css attribute. ModelState modelState; if (htmlHelper.ViewData.ModelState.TryGetValue(fullName, out modelState)) { if (modelState.Errors.Count > 0) { tagBuilder.AddCssClass(HtmlHelper.ValidationInputCssClassName); } } tagBuilder.MergeAttributes(htmlHelper.GetUnobtrusiveValidationAttributes(name, metadata)); return(tagBuilder.ToMvcHtmlString(TagRenderMode.Normal)); }
private static MvcHtmlString DropDownListHelper(HtmlHelper htmlHelper, ModelMetadata metadata, string expression, IEnumerable <SelectListItem> selectList, string optionLabel, IDictionary <string, object> htmlAttributes) { return(SelectInternal(htmlHelper, metadata, optionLabel, expression, selectList, allowMultiple: false, htmlAttributes: htmlAttributes)); }
private static MvcHtmlString ListBoxHelper(HtmlHelper htmlHelper, ModelMetadata metadata, string name, IEnumerable <SelectListItem> selectList, IDictionary <string, object> htmlAttributes) { return(SelectInternal(htmlHelper, metadata, optionLabel: null, name: name, selectList: selectList, allowMultiple: true, htmlAttributes: htmlAttributes)); }
private static MvcHtmlString DisplayTextHelper(ModelMetadata metadata) { return(MvcHtmlString.Create(metadata.SimpleDisplayText)); }
public static MvcHtmlString DisplayTextFor <TModel, TResult>(this HtmlHelper <TModel> html, Expression <Func <TModel, TResult> > expression) { return(DisplayTextHelper(ModelMetadata.FromLambdaExpression(expression, html.ViewData))); }
public static MvcHtmlString DisplayText(this HtmlHelper html, string name) { return(DisplayTextHelper(ModelMetadata.FromStringExpression(name, html.ViewData))); }
// Helper methods #region Common Helpers private static MvcHtmlString InputHelper(HtmlHelper htmlHelper, InputType inputType, ModelMetadata metadata, string name, object value, bool useViewData, bool isChecked, bool setId, bool isExplicitValue, string format, IDictionary <string, object> htmlAttributes) { //string fullName = htmlHelper.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name); string fullName = name; if (String.IsNullOrEmpty(fullName)) { throw new ArgumentException(MvcResources.Common_NullOrEmpty, "name"); } TagBuilder tagBuilder = new TagBuilder("input"); tagBuilder.MergeAttributes(htmlAttributes); tagBuilder.MergeAttribute("type", HtmlHelper.GetInputTypeString(inputType)); tagBuilder.MergeAttribute("name", fullName, true); string valueParameter = htmlHelper.FormatValue(value, format); bool usedModelState = false; switch (inputType) { case InputType.CheckBox: bool?modelStateWasChecked = htmlHelper.GetModelStateValue(fullName, typeof(bool)) as bool?; if (modelStateWasChecked.HasValue) { isChecked = modelStateWasChecked.Value; usedModelState = true; } goto case InputType.Radio; case InputType.Radio: if (!usedModelState) { string modelStateValue = htmlHelper.GetModelStateValue(fullName, typeof(string)) as string; if (modelStateValue != null) { isChecked = String.Equals(modelStateValue, valueParameter, StringComparison.Ordinal); usedModelState = true; } } if (!usedModelState && useViewData) { isChecked = htmlHelper.EvalBoolean(fullName); } if (isChecked) { tagBuilder.MergeAttribute("checked", "checked"); } tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue); break; case InputType.Password: if (value != null) { tagBuilder.MergeAttribute("value", valueParameter, isExplicitValue); } break; default: string attemptedValue = (string)htmlHelper.GetModelStateValue(fullName, typeof(string)); tagBuilder.MergeAttribute("value", attemptedValue ?? ((useViewData) ? htmlHelper.EvalString(fullName, format) : valueParameter), isExplicitValue); break; } if (setId) { tagBuilder.GenerateId(fullName); } // If there are any errors for a named field, we add the css attribute. if (htmlHelper.HasFieldError(fullName)) { tagBuilder.AddCssClass(HtmlHelper.ValidationInputCssClassName); } tagBuilder.MergeAttributes(htmlHelper.GetUnobtrusiveValidationAttributes(name, metadata)); return(tagBuilder.ToHtmlString(TagRenderMode.SelfClosing)); }