How to access the attributes of an object using TestStand. ?

Hello

I have a class named status in c# that has 2 data members. There is another class named parameter and it has functions that return objects of type status.

I did the DLL from the parameter class. Then I added this class to NI TestStand and calls a function and this function returns an object of type status.

Is there a way by which I can access the data members of the object returned in TestStand?

Thanks in advance

Yes, there is another alternative. If you state a value type (i.e. a struct in c#) then you can tell teststand to store it in a corresponding data structure TestStand rather than an object reference variable. It works even for the private fields in your structure. To do this:

(1) first to report a type value and no matter what other changes are needed in your code to take account of this (value types are copied when it is passed by value to another method, if this isn't what you want you will have to pass by reference - i.e. the c# ref keyword).

(2) recompile your assembly.

(3) in the specification of module Panel TestStand .NET, you should now see a new button next to the expression for the return value of type status resembling TestStand data type icon. Press this button and it will prompt you to create a TestStand custom data type that matches the type .NET. Select this option to save the type in the type palette file MyTypes.ini. Just do it once. Once the type is in your palette file type MyTypes.ini it will be available then and you must only update if you change the type .NET.

(4) create a local variable of the TestStand Custom data type instead of the object reference. Note that you can expand and see the properties under.

(5) use this new local variable to store the return value of status. TestStand will be copy/update the properties of the variable to match those of the .NET structure that the method returns.

NOTE: You can also simply store the fields of a struct in separate variables increase the return value of type status once it is a struct and specify a separate variable for each field instead of creating a custom data type TestStand.

Don't forget that TestStand makes a copy when you store a struct that this way replaces the struct when this will not appear in the copy.

Hope this helps,

-Doug

Tags: NI Software

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