// 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>();
// 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);
}
public static HtmlString GenerateHtmlAttributes(this IEnumerable <ModelClientValidationRule> clientRules)
{
if (!clientRules.Any <ModelClientValidationRule>())
{
return(null);
}
Dictionary <string, object> results = new Dictionary <string, object>(StringComparer.OrdinalIgnoreCase);
UnobtrusiveValidationAttributesGenerator.GetValidationAttributes(clientRules, results);
StringBuilder builder = new StringBuilder();
foreach (KeyValuePair <string, object> pair in results)
{
string key = pair.Key;
string str2 = HttpUtility.HtmlEncode(Convert.ToString(pair.Value, CultureInfo.InvariantCulture));
builder.Append(key).Append("=\"").Append(str2).Append('"').Append(' ');
}
if (builder.Length > 0)
{
builder.Length--;
}
return(new HtmlString(builder.ToString()));
}
