protected virtual string GenerateValue(string expression, object value, string format, bool useViewData)
{
var fullName = NameAndIdProvider.GetFullHtmlFieldName(ViewContext, expression);
var attemptedValue =
(string)DefaultHtmlGenerator.GetModelStateValue(ViewContext, fullName, typeof(string));
string resolvedValue;
if (attemptedValue != null)
{
// case 1: if ModelState has a value then it's already formatted so ignore format string
resolvedValue = attemptedValue;
}
else if (useViewData)
{
// case 2: format the value from ViewData
resolvedValue = DefaultHtmlGenerator.EvalString(ViewContext, expression, format);
}
else
{
// case 3: format the explicit value from ModelMetadata
resolvedValue = FormatValue(value, format);
}
return(resolvedValue);
}
/// <inheritdoc />
public string GenerateIdFromName(string fullName)
{
if (fullName == null)
{
throw new ArgumentNullException(nameof(fullName));
}
return(NameAndIdProvider.CreateSanitizedId(ViewContext, fullName, IdAttributeDotReplacement));
}
protected virtual string GenerateName(string expression)
{
var fullName = NameAndIdProvider.GetFullHtmlFieldName(ViewContext, expression);
return(fullName);
}