Random value from correlation parameter

PerfMatrix Site Link: https://www.perfmatrix.com/random-value-from-correlation-parameter-in-loadrunner/

web_reg_save_param("c_correlateParam",
                   "LB=value=\"",
                   "RB=\"",
                   "Ord=All",
                   LAST);

Hope you all are familiar with the most famous correlation function which is written above i.e. "web_reg_save_param". If you are not, read my old posts on correlation. Now, back to the topic, today I will show you how to pick a random value from the list of all captured correlation values through correlation function. 

Firstly, you need to give "All" as a value of "Ord" attribute of the correlation function so that all the values; match left and right boundary; can be captured. For your knowledge when you choose "Ord=All" then the correction parameter acts as an array. If you want to choose any specific value then you can append "_<number>" in the correlation parameter and use in the script. For example, if you need to pick 2nd value then the correlation parameter will be "c_correlateParam_2".

To pick the random value you need to use the following statement:
lr_save_string(lr_paramarr_random("c_correlateParam"),"randParam");

where:

lr_paramarr_random: This function returns a random value from the parameter array. The return value will be a 'String'. In the above example, a random value (string) will be picked from "c_correlateParam" array.

lr_save_string: This function is used to save a string into a parameter. In the above example, the random value (string) extracted by lr_paramarr_random will be saved in "randParam".

Now, you can use "randParam" as a parameter in the script which will pass a random value extracted from the list of captured correlation values.