Passing Nullable To Web Methods C#

Is it possible to pass a nullable parameter to a webservice ?

I tried with this method :

 [WebMethod]
        public Response<bool> IsAColor(bool? isRed, bool? isYellow, bool? isBlue, bool? isBlack)
        {
            ...
        }

And i get this error : System.FormatException: Value 'null' cannot be converted to type 'Boolea开发者_运维知识库n'.

Thanks !

After showing the way you are invoking your web service in SoapUI the problem is the following line:

<num:isRed>null</num:isRed>

That's invalid boolean value. Remove this tag completely if you want to pass null to the isRed parameter.

Like this:

<num:IsAColor>
    <num:isYellow>false</num:isYellow> 
    <num:isBlue>false</num:isBlue> 
    <num:isBlack>true</num:isBlack> 
</num:IsAColor>