private MvcHtmlString LabelFor <TValue>(Expression <Func <TModel, TValue> > expression, object htmlAttributes = null, string expressionTypeName = null)
{
var modelMetadata = ModelMetadata.FromLambdaExpression(expression, _htmlHelper.ViewData);
var expressionText = GetExpressionText(expression);
var labelText = LabelText(modelMetadata, expressionText);
if (string.IsNullOrEmpty(labelText))
{
return(MvcHtmlString.Empty);
}
if (string.IsNullOrEmpty(expressionTypeName))
{
expressionTypeName = GetExpressionTypeName(expression);
}
var templateInfo = _htmlHelper.ViewContext.ViewData.TemplateInfo;
if (!string.IsNullOrEmpty(expressionTypeName))
{
templateInfo.HtmlFieldPrefix = expressionTypeName;
}
var @for = templateInfo.GetFullHtmlFieldId(expressionText);
var labelTag = new TagBuilder("label");
labelTag.MergeAttributes(RouteValueDictionaryExtensions.Convert(htmlAttributes));
labelTag.Attributes.Add("for", Sanitizer.Slug(@for));
labelTag.SetInnerText(labelText);
return(MvcHtmlString.Create(labelTag.ToString(TagRenderMode.Normal)));
}
private MvcHtmlString TextAreaHelper(ModelMetadata modelMetadata, string name, IDictionary <string, object> rowsAndColumns, object htmlAttributes, string expressionTypeName = null)
{
var templateInfo = _htmlHelper.ViewContext.ViewData.TemplateInfo;
if (!string.IsNullOrEmpty(expressionTypeName))
{
templateInfo.HtmlFieldPrefix = expressionTypeName;
}
var fullName = templateInfo.GetFullHtmlFieldName(name);
var textAreaTag = new TagBuilder("textarea");
textAreaTag.MergeAttribute("id", Sanitizer.Slug(fullName));
textAreaTag.MergeAttributes(RouteValueDictionaryExtensions.Convert(htmlAttributes), true);
textAreaTag.MergeAttributes(rowsAndColumns, rowsAndColumns != null);
textAreaTag.MergeAttribute("name", fullName, true);
ModelState modelState;
_htmlHelper.ViewData.ModelState.TryGetValue(fullName, out modelState);
var unobtrusiveValidationAttributes = _htmlHelper.GetUnobtrusiveValidationAttributes(name);
textAreaTag.MergeAttributes(unobtrusiveValidationAttributes);
string value;
if (modelState != null && modelState.Value != null)
{
value = modelState.Value.AttemptedValue;
}
else if (modelMetadata.Model != null)
{
value = modelMetadata.Model.ToString();
}
else
{
value = string.Empty;
}
textAreaTag.SetInnerText(value);
return(textAreaTag.ToMvcHtmlString(TagRenderMode.Normal));
}
public static void InjectMessages(this ModelStateDictionary modelStateDictionary, ServiceOperationResult serviceOperationResult)
{
foreach (var errorMessage in serviceOperationResult.Errors)
{
if (string.IsNullOrEmpty(errorMessage.Key))
{
modelStateDictionary.AddModelError("", errorMessage.Value);
continue;
}
var key = Sanitizer.Slug(errorMessage.Key);
var modelError = modelStateDictionary.Keys.Where(k => k.EndsWith(key)).OrderBy(k => k.Length).FirstOrDefault();
if (modelError == null)
{
return;
}
modelStateDictionary[modelError].Errors.Add(errorMessage.Value);
}
}
private static string CreateSubPropertyName(string propertyName)
{
propertyName = Sanitizer.Slug(propertyName);
return(propertyName);
}
protected static string GetExpressionText <TProperty, TModel>(Expression <Func <TModel, TProperty> > expression)
{
var expressionText = ExpressionHelper.GetExpressionText(expression);
return(Sanitizer.Slug(expressionText));
}
private MvcHtmlString ValidationMessageHelper(ModelMetadata modelMetadata, string expression, string validationMessage, IDictionary <string, object> htmlAttributes, out bool hasError, string expressionTypeName = null)
{
hasError = false;
var formContext = _htmlHelper.ViewContext.FormContext;
var templateInfo = _htmlHelper.ViewContext.ViewData.TemplateInfo;
if (!string.IsNullOrEmpty(expressionTypeName))
{
templateInfo.HtmlFieldPrefix = expressionTypeName;
}
var fullName = templateInfo.GetFullHtmlFieldName(expression);
if (!_htmlHelper.ViewData.ModelState.ContainsKey(fullName) && formContext == null)
{
return(null);
}
var modelState = _htmlHelper.ViewData.ModelState[fullName];
var modelErrors = (modelState == null) ? null : modelState.Errors;
var modelError = (((modelErrors == null) || (modelErrors.Count == 0)) ? null : modelErrors.FirstOrDefault(me => !string.IsNullOrEmpty(me.ErrorMessage)) ?? modelErrors[0]);
if (modelError == null && formContext == null)
{
return(null);
}
var builder = new TagBuilder("span");
builder.AddCssClass("help-inline");
builder.MergeAttributes(htmlAttributes);
if (!string.IsNullOrEmpty(validationMessage))
{
builder.SetInnerText(validationMessage);
hasError = true;
}
else if (modelError != null)
{
builder.SetInnerText(GetUserErrorMessageOrDefault(_htmlHelper.ViewContext.HttpContext, modelError, modelState));
hasError = true;
}
if (formContext != null)
{
var replaceValidationMessageContents = string.IsNullOrEmpty(validationMessage);
if (_htmlHelper.ViewContext.UnobtrusiveJavaScriptEnabled)
{
builder.MergeAttribute("data-valmsg-for", fullName);
builder.MergeAttribute("data-valmsg-replace", replaceValidationMessageContents.ToString().ToLowerInvariant());
}
else
{
var fieldMetadata = ApplyFieldValidationMetadata(_htmlHelper, modelMetadata, fullName);
fieldMetadata.ReplaceValidationMessageContents = replaceValidationMessageContents;
builder.MergeAttribute("id", Sanitizer.Slug(fullName + "ValidationMessage"));
fieldMetadata.ValidationMessageId = builder.Attributes["id"];
}
}
return(builder.ToMvcHtmlString(TagRenderMode.Normal));
}
private MvcHtmlString InputHelper(InputType inputType, ModelMetadata modelMetadata, string name, object value, bool useViewData, bool isChecked, bool setId, bool isExplicitValue, object htmlAttributes, string expressionTypeName = null)
{
var templateInfo = _htmlHelper.ViewContext.ViewData.TemplateInfo;
if (!string.IsNullOrEmpty(expressionTypeName))
{
templateInfo.HtmlFieldPrefix = expressionTypeName;
}
var fullName = templateInfo.GetFullHtmlFieldName(name);
var tagBuilder = new TagBuilder("input");
tagBuilder.MergeAttributes(RouteValueDictionaryExtensions.Convert(htmlAttributes));
tagBuilder.MergeAttribute("type", HtmlHelper.GetInputTypeString(inputType));
tagBuilder.MergeAttribute("name", fullName, true);
var valueParameter = Convert.ToString(value, CultureInfo.CurrentCulture);
var usedModelState = false;
switch (inputType)
{
case InputType.CheckBox:
var modelStateWasChecked = GetModelStateValue(fullName, typeof(bool)) as bool?;
if (modelStateWasChecked.HasValue)
{
isChecked = modelStateWasChecked.Value;
usedModelState = true;
}
goto case InputType.Radio;
case InputType.Radio:
if (!usedModelState)
{
var modelStateValue = GetModelStateValue(fullName, typeof(string)) as string;
if (modelStateValue != null)
{
isChecked = string.Equals(modelStateValue, valueParameter, StringComparison.Ordinal);
usedModelState = true;
}
}
if (!usedModelState && useViewData)
{
isChecked = 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:
var attemptedValue = (string)GetModelStateValue(fullName, typeof(string));
tagBuilder.MergeAttribute("value", attemptedValue ?? ((useViewData) ? EvalString(fullName) : valueParameter), isExplicitValue);
break;
}
if (setId)
{
tagBuilder.MergeAttribute("id", Sanitizer.Slug(fullName));
}
ModelState modelState;
_htmlHelper.ViewData.ModelState.TryGetValue(fullName, out modelState);
var unobtrusiveValidationAttributes = _htmlHelper.GetUnobtrusiveValidationAttributes(name, modelMetadata);
tagBuilder.MergeAttributes(unobtrusiveValidationAttributes);
if (inputType == InputType.CheckBox)
{
var inputItemBuilder = new StringBuilder();
inputItemBuilder.Append(tagBuilder.ToString(TagRenderMode.SelfClosing));
var 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.ToMvcHtmlString(TagRenderMode.SelfClosing));
}
private MvcHtmlString SelectInternal(ModelMetadata modelMetadata, string optionLabel, string name, IEnumerable <SelectListItem> selectList, bool allowMultiple, object htmlAttributes, string expressionTypeName = null)
{
var templateInfo = _htmlHelper.ViewContext.ViewData.TemplateInfo;
if (!string.IsNullOrEmpty(expressionTypeName))
{
templateInfo.HtmlFieldPrefix = expressionTypeName;
}
var fullName = templateInfo.GetFullHtmlFieldName(name);
var usedViewData = false;
if (selectList == null)
{
selectList = GetSelectData(fullName);
usedViewData = true;
}
var defaultValue = allowMultiple ? GetModelStateValue(fullName, typeof(string[])) : GetModelStateValue(fullName, typeof(string));
if (!usedViewData)
{
if (defaultValue == null)
{
defaultValue = _htmlHelper.ViewData.Eval(fullName);
}
}
if (defaultValue != null)
{
var defaultValues = allowMultiple ? defaultValue as IEnumerable : new[] { defaultValue };
var values = from object value in defaultValues
select Convert.ToString(value, CultureInfo.CurrentCulture);
var selectedValues = new HashSet <string>(values, StringComparer.OrdinalIgnoreCase);
var newSelectList = new List <SelectListItem>();
if (selectList != null)
{
foreach (var selectListItem in selectList)
{
selectListItem.Selected = selectListItem.Value != null?selectedValues.Contains(selectListItem.Value) : selectedValues.Contains(selectListItem.Text);
newSelectList.Add(selectListItem);
}
}
selectList = newSelectList;
}
var listItemBuilder = new StringBuilder();
if (optionLabel != null)
{
listItemBuilder.AppendLine(ListItemToOption(new SelectListItem {
Text = optionLabel,
Value = string.Empty,
Selected = false
}));
}
if (selectList != null)
{
foreach (var item in selectList)
{
listItemBuilder.AppendLine(ListItemToOption(item));
}
}
var tagBuilder = new TagBuilder("select")
{
InnerHtml = listItemBuilder.ToString()
};
tagBuilder.MergeAttributes(RouteValueDictionaryExtensions.Convert(htmlAttributes));
tagBuilder.MergeAttribute("name", fullName, true);
tagBuilder.MergeAttribute("id", Sanitizer.Slug(fullName));
if (allowMultiple)
{
tagBuilder.MergeAttribute("multiple", "multiple");
}
ModelState modelState;
_htmlHelper.ViewData.ModelState.TryGetValue(fullName, out modelState);
var unobtrusiveValidationAttributes = _htmlHelper.GetUnobtrusiveValidationAttributes(name, modelMetadata);
tagBuilder.MergeAttributes(unobtrusiveValidationAttributes);
return(tagBuilder.ToMvcHtmlString(TagRenderMode.Normal));
}
