.NET type conversions in LabVIEW

[pawhan11]

Hello,

I need to implement this simple data casting of c# objects in LV

 

    object o = "MyString";
    SqlString t1 = o as String      

 

How this can be done in LV??

 

 

cast.vi

[Rolf Kalbermatter]

You can't do that! Your LabVIEW code really is equivalent to this .Net code which will definitely throw an error!

int stringdata[] = {1, 2};
String string = new String(stringdata);
SqlString sql = (SqlString)string;       // throwing an error

and String is not an SqlString in a long shot and neither is an SqlString a String, as it does not inherit from String at all. It is its own object type.

Maybe .Net does some super magic behind the scenes and the C# code you wrote is valid but purely from a type compatible point of view reinterpreting the String object o as SqlString isn't a direct compatible conversion.

The proper code construct would be something along the lines of:

SqlString sql = new SqlString(o);

In LabVIEW use the SqlString contstructor that allows to pass in a String paremeter for the initialization.

Edited July 17, 2018 by rolfk

[ak_nz]

Just a note that the C# code shown by the OP isn't magically interpreted differently by the C# compiler and will throw an exception at run-time just as rolfk says and for the reason he says.