Passing List of Strings or Array of strings into Unity Injection Constructor (Config-Based)

Question

I cannot seem to get unity working when attempting to pass in an array of strings into a constructor parameter list, while using XML configuration.

When I try the following:

<typeConfig ...>
  <constructor ...>
    <param ... parameterType="System.String[]">
     <array>    
      <value.../>
      <value.../>
     </array>
    </param> 
  </constructor>
</typeConfig>

for a c'tor which looks like this:

void Foo(string[] inputParams_){ ... }

It always fails in Unity's FindConstructor(...) method stating that it cannot find a c'tor mathcing the parameter type of String.String

Does anyone know how to pass an array of stings successfully into this type of c'tor? If not, how can I do so with a list of strings, if the c'tor were to accept an IList?

Thanks!

javi · Accepted Answer · 2012-07-31 15:05:15Z

2

You don't need the attribute 'parameterType' for the element 'param'

This will work:

    <constructor>
      <param name="eventsDefinitions">
        <array>
          <value value="PhaseLoss"/>
          <value value="DCRC" />
          <value value="PhaseRotation" />
        </array>
      </param>
    </constructor>

answered Jul 31, 2012 at 15:05

javi

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Comments

Community · Accepted Answer · 2017-05-23 12:19:37Z

1

Typically I prefer to configure Unity in code, so I may not be that helpful if config is a must. But ....

Typically I'd use a ConstructorInjector during registration:

container.Configure() .ConfigureInjectionFor(new InjectionConstructor([value]))

But according to: Can I pass constructor parameters to Unity's Resolve() method?

Unity 2 should now also includes the ability to pass parameters into the constructor dynamically during resolution:

"container.Resolve(new ParameterOverrides { { "name", "bar" }, { "address", 42 } });"

edited May 23, 2017 at 12:19

CommunityBot

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answered May 1, 2010 at 11:20

Doobi

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2 Comments

miguel Over a year ago

thanks, but the questions is specifically about configuratin files

Doobi Over a year ago

No worries. Another worthless try is - I've seen the notation "'1" dotted around text configuration, something like "String'1" usually when referring to some sort of generic collection.

Peter Lillevold · Accepted Answer · 2010-05-01 10:59:42Z

0

Maybe you will have to fully qualify the type name:

System.String[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089

Optionally, you may drop the version if you don't care/know.

answered May 1, 2010 at 10:59

Peter Lillevold

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1 Comment

miguel Over a year ago

hmm, not sure will try it, but system.string doesnt require qualification elsewhere.

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