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Dynamics 365 Community / Forums / Microsoft Dynamics AX (Archived) / Clr Interop Marshal: U...
Microsoft Dynamics AX (Archived)

Clr Interop Marshal: Unsupported type

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Posted on by Naresh Kumar 362

Hi All,

i have written the below method inside a c# class library , i have build it successfully and added it to AOT ,

i'm  able to access the class and method in X++ , but not able to loop through the string array which is returned by the dotnet code.

can some one help me with some code snippet 

public string[] customersinfo()
{

string city, firstname, lastname, custid;
string[] details = new string[4];

firstname = "";
lastname = "";
city = "";
custid = "";

details[0] = firstname;
details[1] = lastname;
details[2] = city;
details[3] = custid;

return details;
}

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I have the same question (0)
  • Martin Dráb Profile Picture
    Martin Dráb 236,320 Most Valuable Professional on at
    RE: Clr Interop Marshal: Unsupported type

    The bug must be in how you work with the array in X++, so please show us the right piece of code. The code above is fine, although you can greatly simplify it, if you want:

    return new[] { "", "", "", "" };

    Note that using an object representing the customer would be a better design, because you would get IntelliSense, you could use different types and so on.

  • Vilmos Kintera Profile Picture
    Vilmos Kintera 46,149 on at
    RE: Clr Interop Marshal: Unsupported type

    Your piece of code does not seem to be connected to .Net values.

    Didn't you mean to use the .Net string array as System.String[] instead, and associate/extract values from there?

  • Martin Dráb Profile Picture
    Martin Dráb 236,320 Most Valuable Professional on at
    RE: Clr Interop Marshal: Unsupported type

    It actually is C# code; string is in alias of System.String (it would be str in X++).

  • Vilmos Kintera Profile Picture
    Vilmos Kintera 46,149 on at
    RE: Clr Interop Marshal: Unsupported type

    I was referring to his looping through piece of code inside AX which consumes his C# method pasted above, that he failed to show. That is why I tried to suggest to marshal it to the same type in X++, then extract values from there.

  • Naresh Kumar Profile Picture
    Naresh Kumar 362 on at
    RE: Clr Interop Marshal: Unsupported type

    Hi Martin ,

    Below is the piece of code that you have written

    CustomerDetails.Customers obj = new CustomerDetails.Customers();

    System.String[] _details = new System.String[30]();

    int i ;

       _details = obj.customersinfo();

    for(i=0;i<_details.get_Count();i++)

       {

          info(_details.get_Item(i);

       }

    Regards,

    Naresh

  • Naresh Kumar Profile Picture
    Naresh Kumar 362 on at
    RE: Clr Interop Marshal: Unsupported type

    Hi Vilmos,

    how to marshall the code

    this is the below piece of code i have written and im getting the error

    Error executing code : wrong argument types for comaprison

    CustomerDetails.Customers obj = new CustomerDetails.Customers();

    System.String[] _details = new System.String[30]();

    int i ;

       _details = obj.customersinfo();

    for(i=0;i<_details.get_Count();i++)

       {

          info(_details.get_Item(i));

       }

  • Martin Dráb Profile Picture
    Martin Dráb 236,320 Most Valuable Professional on at
    RE: Clr Interop Marshal: Unsupported type

    There is no need to initialize _details and immediately throw the value away and replace it with the value from customersinfo(), therefore your code can be simplified to this:

    CustomerDetails.Customers obj = new CustomerDetails.Customers();
System.String[] details = obj.customersinfo();
int i;

for (i = 0; I < details.get_Count(); i++)
{
    info(_details.get_Item(i));
}

    Now please tell us which line is throwing the error. Isn't the one with info()?

  • Naresh Kumar Profile Picture
    Naresh Kumar 362 on at
    RE: Clr Interop Marshal: Unsupported type

    Yes martin ,info statement is giving the error

    _details.get_count() is giving the correct count (i.e 4)

    could you please tell me where is the error

  • Verified answer
    Martin Dráb Profile Picture
    Martin Dráb 236,320 Most Valuable Professional on at
    RE: Clr Interop Marshal: Unsupported type

    It's related to marshalling (the conversion from .NET types to X++), not the number of array elements.

    One solution is using clr2XppStr(), such as info(clr2XppStr(_details.get_Item(i)));.

    Alternatively your can assign the value to a local str variable and then use this X++ string variable in info().

    It's a certain limitation of how marshalling of .NET types in implemented in AX.

  • Verified answer
    Vilmos Kintera Profile Picture
    Vilmos Kintera 46,149 on at
    RE: Clr Interop Marshal: Unsupported type

    Try to marshal it like:

    str strValue;

    strValue = ClrInterop::getAnyTypeForObject(_details.get_Item(i));

    info(strValue);

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