public static string ExtractString(this HttpRequest request, RequestCollectionType requestCollectionType, string key)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
if (string.IsNullOrWhiteSpace(key))
{
throw new ArgumentNullException(key);
}
string value = null;
if (requestCollectionType == RequestCollectionType.Form && request.Form != null && request.Form.ContainsKey(key))
{
value = request.Form[key];
}
else if (requestCollectionType == RequestCollectionType.Query && request.Query != null && request.Query.ContainsKey(key))
{
value = request.Query[key];
}
else if (requestCollectionType == RequestCollectionType.Cookie && request.Cookies != null && request.Cookies.ContainsKey(key))
{
value = request.Cookies[key];
}
return(value);
}
public static T ExtractValue <T>(this HttpRequest request, string key, T defaultValue, RequestCollectionType requestCollectionType = RequestCollectionType.Query)
{
string stringValue = ExtractString(request, requestCollectionType, key);
T value = defaultValue;
if (stringValue != null)
{
TypeConverter typeConverter = TypeDescriptor.GetConverter(typeof(T));
if (typeConverter != null)
{
if (typeConverter.CanConvertFrom(typeof(string)))
{
value = (T)typeConverter.ConvertTo(stringValue, typeof(T));
}
}
}
return(value);
}
