/// <summary>
/// Returns the value of a parameter or null if it doesn't exist.
///
/// You should only use this method if you're sure the parameter has only one value.
///
/// If you need to support multiple values use GetParameterValues.
/// </summary>
/// <param name="parser">The multipart form parser.</param>
/// <param name="name">The name of the parameter.</param>
/// <returns>The value of the parameter.</returns>
public static string GetParameterValue(this IMultipartFormDataParser parser, string name)
{
return(parser.GetParameterValues(name).FirstOrDefault());
}
/// <summary>
/// Returns the values of a parameter or an empty enumerable if the parameter doesn't exist.
/// </summary>
/// <param name="parser">The multipart form parser.</param>
/// <param name="name">The name of the parameter.</param>
/// <returns>The values of the parameter.</returns>
public static IEnumerable <string> GetParameterValues(this IMultipartFormDataParser parser, string name)
{
return(parser.Parameters
.Where(p => p.Name == name)
.Select(p => p.Data));
}
/// <summary>
/// Returns true if the parameter has any values. False otherwise.
/// </summary>
/// <param name="parser">The multipart form parser.</param>
/// <param name="name">The name of the parameter.</param>
/// <returns>True if the parameter exists. False otherwise.</returns>
public static bool HasParameter(this IMultipartFormDataParser parser, string name)
{
return(parser.Parameters.Any(p => p.Name == name));
}
