How do I pass null to a nullable parameter of a ASP.NET web service method via javascript

Question

Given the following ASP.NET code:

[System.Web.Script.Services.ScriptService]
public class Quotes : System.Web.Services.WebService
{
    [WebMethod]
    public void Calculate(int param1, int? param2)
    {

etc.. How can I pass a null value to param2? If I don't pass the parameter at all, or I pass undefined, my error handler fires with "Invalid web service call, missing value for parameter: 'param2'".

score 2 · Accepted Answer · edited May 23 '17 at 12:01

2

Ok I was being stupid. I simply pass null!

Why is null an object and what's the difference between null and undefined?

edited May 23 '17 at 12:01

Community

1
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answered Aug 24 '10 at 14:58

Sprintstar

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score 1 · Answer 2 · answered Aug 24 '10 at 17:16

1

If you're using C# 4.0 you could set a default value on the parameter.

ie

[WebMethod]
    public void Calculate(int param1, int? param2 = null)
    {...}

answered Aug 24 '10 at 17:16

Dave

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How do I pass null to a nullable parameter of a ASP.NET web service method via javascript

2 Answers2