// Add the given parameter to the list. Remove if date is null.
private void SetDate(string parameter, DateTimeOffset?date)
{
NameValueHeaderValue dateParameter = NameValueHeaderValue.Find(_parameters, parameter);
if (date == null)
{
// Remove parameter.
if (dateParameter != null)
{
_parameters.Remove(dateParameter);
}
}
else
{
// Must always be quoted.
string dateString = "\"" + HttpRuleParser.DateToString(date.Value) + "\"";
if (dateParameter != null)
{
dateParameter.Value = dateString;
}
else
{
Parameters.Add(new NameValueHeaderValue(parameter, dateString));
}
}
}
internal static void SetQuality(ObjectCollection <NameValueHeaderValue> parameters, double?value)
{
Debug.Assert(parameters != null);
NameValueHeaderValue qualityParameter = NameValueHeaderValue.Find(parameters, qualityName);
if (value.HasValue)
{
// Note that even if we check the value here, we can't prevent a user from adding an invalid quality
// value using Parameters.Add(). Even if we would prevent the user from adding an invalid value
// using Parameters.Add() he could always add invalid values using HttpHeaders.AddWithoutValidation().
// So this check is really for convenience to show users that they're trying to add an invalid
// value.
if ((value < 0) || (value > 1))
{
throw new ArgumentOutOfRangeException(nameof(value));
}
string qualityString = ((double)value).ToString("0.0##", NumberFormatInfo.InvariantInfo);
if (qualityParameter != null)
{
qualityParameter.Value = qualityString;
}
else
{
parameters.Add(new NameValueHeaderValue(qualityName, qualityString));
}
}
else
{
// Remove quality parameter
if (qualityParameter != null)
{
parameters.Remove(qualityParameter);
}
}
}
