public override bool TryProvideDefaultValue(ParameterInfo parameter, out object?value)
{
if (parameter.HasDefaultValue)
{
value = parameter.DefaultValue;
return(true);
}
Type resultType = parameter.ParameterType;
if (resultType.IsValueType)
{
try
{
value = Activator.CreateInstance(resultType);
return(true);
}
catch
{
value = default;
return(false);
}
}
else
{
if (parameter.CanBeNull())
{
value = default;
return(true);
}
if (resultType == typeof(string))
{
value = string.Empty;
return(true);
}
try
{
value = Activator.CreateInstance(resultType);
return(true);
}
catch
{
value = default;
return(false);
}
}
}
public override bool TryProvideSpecialValue(ParameterInfo parameter, ICommand command, out Message?value) => command.Update.TryGetMessage(out value) || parameter.CanBeNull();
public override bool TryProvideSpecialValue(ParameterInfo parameter, ICommand command, out ChatId?value) => command.Update.TryGetChatIdOrUserId(out value) || parameter.CanBeNull();
