Nullable parameter type name

[Andrus]

My type contains constructor with nullable parameter like

public class Iandmed {
public Iandmed(DateTim e? miskuup) {}
}

I tried to get its constructor parameter type name using

Type t = typeof(Iandmed) ;
ConstructorInfo c = t.GetConstructo rs()[0];
ParameterInfo p = c.GetParameters ()[0];

p.ParameterType .Name returns wrong values for nullable types, in this case

"Nullable`1 "

How to get exact type name:

"DateTime?"

Andrus.

[Jon Skeet [C# MVP]]

Andrus <ko********@hot .eewrote:

My type contains constructor with nullable parameter like

public class Iandmed {
public Iandmed(DateTim e? miskuup) {}
}

I tried to get its constructor parameter type name using

Type t = typeof(Iandmed) ;
ConstructorInfo c = t.GetConstructo rs()[0];
ParameterInfo p = c.GetParameters ()[0];

p.ParameterType .Name returns wrong values for nullable types, in this case

"Nullable`1 "

How to get exact type name:

"DateTime?"

Don't use the Name property - use other properties to get specific
parts. In particular, the FullName property gives
System.Nullable `1[[System.DateTime , mscorlib, Version=2.0.0.0 ,
Culture=neutral ,PublicKeyToken =b77a5c561934e0 89]]

Alternatively you can use
p.ParameterType .GetGenericArgu ments()[0]

to get the DateTime part on its own, or
Nullable.GetUnd erlyingType(p.P arameterType)

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Peter Duniho]

On 2007-11-11 15:28:06 -0800, "Andrus" <ko********@hot .eesaid:

[...]
p.ParameterType .Name returns wrong values for nullable types, in this case

"Nullable`1 "

How to get exact type name:

"DateTime?"

I don't have the answer off the top of my head. But I can tell you
that you are getting the correct type name. "DateTime?" is actually
equivalent to "Nullable<DateT ime>", thus the generated generic type
name.

You'll want to research how to obtain the generic paramter type
information from a concrete instance of a generic class. That will
provide the information you're looking for. Unfortunately, I don't use
reflection enough to be able to tell you the exact answer, but
hopefully that gets you pointed in the right direction.

Pete