/// <summary>
/// Get a string value from a dictionary, and convert it to integer. Throw an
/// exception if it's not a valid positive integer string.
/// However, don't complain about null, which simply means the value is not
/// in the dictionary.
/// The value is returned through a REF param (unchanged if null)
/// </summary>
/// <returns>True if attrib exists, false otherwise</returns>
internal static bool GetAndRemoveNonNegativeIntegerAttribute(IDictionary directives, string key, ref int val)
{
string s = ServiceParserUtilities.GetAndRemove(directives, key);
if (s.Length == 0)
{
return(false);
}
val = GetNonNegativeIntegerAttribute(key, s);
return(true);
}
/// <summary>
/// Get a value from a dictionary, and remove it from the dictionary if
/// it exists. Throw an exception if the value is a whitespace string.
/// However, don't complain about null, which simply means the value is not
/// in the dictionary.
/// </summary>
internal static string GetAndRemoveNonEmptyAttribute(IDictionary directives, string key, bool required)
{
string val = ServiceParserUtilities.GetAndRemove(directives, key);
if (val.Length == 0)
{
if (required)
{
throw FxTrace.Exception.AsError(new HttpException(SR.Hosting_BuildProviderAttributeMissing(key)));
}
return(null);
}
return(val);
}
/// <summary>
/// Get a string value from a dictionary, and convert it to bool. Throw an
/// exception if it's not a valid bool string.
/// However, don't complain about null, which simply means the value is not
/// in the dictionary.
/// The value is returned through a REF param (unchanged if null)
/// </summary>
/// <returns>True if attrib exists, false otherwise</returns>
internal static bool GetAndRemoveBooleanAttribute(IDictionary directives, string key, ref bool val)
{
string s = ServiceParserUtilities.GetAndRemove(directives, key);
if (s.Length == 0)
{
return(false);
}
try
{
val = bool.Parse(s);
}
catch (FormatException)
{
throw FxTrace.Exception.AsError(new HttpException(SR.Hosting_BuildProviderInvalidValueForBooleanAttribute(s, key)));
}
return(true);
}