topic Re: what different between Set Control Value [Variant] and Set Control Value Method in LabVIEW

what different between Set Control Value [Variant] and Set Control Value Method

菊花烧饼 — Fri, 03 Nov 2006 08:35:29 GMT

I wanna to read many input parameter(more than one subvi) from ini file.

And input parameter will be different type (number,bool sting)

so how I can use "Set Control Value [Variant]" or" Set Control Value" to do it.

I do not know how to input different type parameter ?

thanks for your helps!

sonic

Re: what different between Set Control Value [Variant] and Set Control Value Method

Dennis_Knutson — Fri, 03 Nov 2006 14:45:35 GMT

With Set Control Value, you had to use a Variant to Flattened String function or Flatten to String function to provide the type descriptor and flattened data inputs. This was the original method LabVIEW provided to set a control. In LabVIEW 7.0, Set Control Value [Variant] was introduced and the old method was left for compatability reasons. The new method determines the data type and flatens the data for you so you can just wire your data in. The data type that you wire must match the data type of the control you are trying to set with either method. So, if you wire a number (i.e. 1.234) to either Set Control Value or Set Control Value [Variant] and the control is a string, you will get an error.

Re: what different between Set Control Value [Variant] and Set Control Value Method

菊花烧饼 — Mon, 06 Nov 2006 01:09:50 GMT

thanks Dennis !

if i wanna input many type of input parameter,I can not change the input type toilless.

I wanna read the data from a ini file ,the data include many type of input parameter,then I use set Set Control Value [Variant} to change the control value.but it hardly come true by differnet type parameter.

sonic

Re: what different between Set Control Value [Variant] and Set Control Value Method

Dennis_Knutson — Mon, 06 Nov 2006 15:29:44 GMT

I'm not really sure what you are asking. I think you want to use the ini file functions from OpenG. There are functions to read/write panels with variants and makes it all pretty simple.

Re: what different between Set Control Value [Variant] and Set Control Value Method

菊花烧饼 — Tue, 07 Nov 2006 07:00:31 GMT

Thanks!!!

I will try.....