/// <summary>
/// create http query string based on properties
/// </summary>
/// <param name="obj">base object</param>
/// <param name="option">formatting options(datetime)</param>
/// <returns>http query string</returns>
public static string ToQueryString(this object obj, HttpQueryStringOption option = null)
{
var properties = obj.GetType()
.GetProperties()
.Where(p => p.GetValue(obj, null) != null)
.ToList();
if (properties.IsNullOrEmpty())
{
return("");
}
var queries = new List <string>();
if (option.IsNotNull())
{
var timeQuery = GetTimeQuery(obj, ref properties, option);
if (timeQuery.IsNotNullOrEmptyOrWhiteSpace())
{
queries.Add(timeQuery);
}
}
var arrayQuery = GetArrayQuery(obj, ref properties);
if (arrayQuery.IsNotNullOrEmptyOrWhiteSpace())
{
queries.Add(arrayQuery);
}
var enumQuery = GetEnumQuery(obj, ref properties);
if (enumQuery.IsNotNullOrEmptyOrWhiteSpace())
{
queries.Add(enumQuery);
}
var parametersQuery = GetPropertiesQuery(obj, properties);
if (parametersQuery.IsNotNullOrEmptyOrWhiteSpace())
{
queries.Add(parametersQuery);
}
return(queries.Join("&"));
}
private static string GetTimeQuery(object obj, ref List <PropertyInfo> properties, HttpQueryStringOption option)
{
var parameters = properties.Where(p =>
p.PropertyType == typeof(DateTime) ||
p.PropertyType == typeof(DateTime?) ||
p.PropertyType == typeof(DateTimeOffset) ||
p.PropertyType == typeof(DateTimeOffset?)
)
.ToList();
properties = properties.Except(parameters).ToList();
var queryItems = new List <string>();
foreach (var parameter in parameters)
{
var queryItem = string.Empty;
var value = parameter.GetValue(obj);
if (value is DateTime? && value.IsNotNull())
{
var nullableDt = (DateTime)value;
queryItem = $"{parameter.Name}={HttpUtility.UrlEncode(nullableDt.ToString(option.DateTimeFormat))}";
}
else
{
queryItem = value switch
{
DateTimeOffset nullableOffset when nullableOffset.IsNotNull() =>
$"{parameter.Name}={HttpUtility.UrlEncode(nullableOffset.ToString(option.DateTimeFormat))}",
DateTime dt =>
$"{parameter.Name}={HttpUtility.UrlEncode(dt.ToString(option.DateTimeFormat))}",
DateTimeOffset offset =>
$"{parameter.Name}={HttpUtility.UrlEncode(offset.ToString(option.DateTimeFormat))}",
_ => queryItem
};
}
queryItems.Add(queryItem);
}
return(queryItems.Join("&"));
}
