from System import String, Char, Int32
def TestCharArray():
    from System import Array
    charArrType = Array[Char]
    ##arrType = charArrType('hello')
    ##for char in arrType:
    ##    print char,
    ## Also works on instances of the type! ##
    strCharArr = String.__overloads__[charArrType]
    s = strCharArr(list('hello'))
    print s
TestCharArray()

On 5/17/2011 12:38 AM, Barton wrote:

def TestCharArray():
    from System import Array
    charArrType = Array[Char]
    ##arrType = charArrType('hello')
    ##for char in arrType:
    ##    print char,
    ## Also works on instances of the type! ##
    strCharArr = s.__overloads__[charArrType]
    s = strCharArr(list('hello'))
    print s

On 5/16/2011 6:29 PM, Adrian Perez wrote:
Hello everyone,

This is probably a total n00b question, but I've been using pythonnet in our toolchain to communicate with a private c# assembly for months now without ever running into a problem I couldn't eventually figure out. This one has me totally stumped, and I'm hoping something obvious will jump out at experienced eyes.

(I did a find/replace for secrecy, besides silly names these are the raw results I get back)

A C# class exposes a method 'WriteByte' that has 5 overloads (note that only one of them takes 2 arguments):

accessor= MyCompany.SomeNamespace.SomeTypeArrayAccessor
accessor.WriteByte.__overloads__
Boolean WriteByte(MyCompany.SomeNamespace.SomeType, Byte[])
Boolean WriteByte(MyCompany.SomeNamespace.SomeType, Byte[], Int32 ByRef)
Boolean WriteByte(MyCompany.SomeNamespace.SomeType, System.Collections.Generic.IEnumerable`1[System.Byte], Int32 ByRef) Boolean WriteByte(MyCompany.SomeNamespace.SomeType, Int32, System.Collections.Generic.IEnumerable`1[System.Byte], Int32 ByRef) Boolean WriteByte(MyCompany.SomeNamespace.SomeType, Int32, Byte[], Int32 ByRef)

I attempt to disambiguate by selecting the 2-arg method I want by type:

desired_method= accessor.WriteByte.__overloads__[MyCompany.SomeNamespace.SomeType, System.Array[System.Byte]]
The problem may be right here - if I print out desired_method.__doc__ I get the same 5 methods listed above. Anyway, then I compute my arguments, and can verify they have the types I expect (If it matters, arg_b is created by a call to System.IO.BinaryReader.ReadBytes()):

arg_a= ...
arg_b= ...
type(arg_a)
<class 'MyCompany.SomeNamespace.SomeType'>
type(arg_b)
<class 'System.Byte[]'>

However, when I try to call the disambiguated method with the correct args, I get no love:

result= desired_method(arg_a, arg_b)
Traceback (most recent call last):
   File "<string>", line 1, in<fragment>
TypeError: No method matches given arguments

Does anyone see the obvious thing I'm doing wrong? Disambiguating can be a pain but I've done it before for other methods and have never had such an impossible time getting the correct method called.

Thanks,

Adrian Perez
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